chore: bump version to 0.3.0

- move JLPT/frequency dictionary init off sync fs APIs and add cooperative yielding during entry processing

- decouple first tokenization from full warmup by gating only on Yomitan readiness while MeCab/dictionary warmups continue in parallel

- update mpv pause-until-ready OSD copy to tokenization-focused wording and refresh gate regression assertions

.github/workflows/release.yml

@@ -278,45 +278,70 @@ jobs:
           echo "$CHANGES" >> $GITHUB_OUTPUT
           echo "EOF" >> $GITHUB_OUTPUT
 
-      - name: Create Release
+      - name: Publish Release
-        uses: softprops/action-gh-release@v2
+        env:
-        with:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          name: ${{ steps.version.outputs.VERSION }}
+        run: |
-          body: |
+          set -euo pipefail
-            ## Changes
-            ${{ steps.changelog.outputs.CHANGES }}
 
-            ## Installation
+          cat > release-body.md <<'EOF'
+          ## Changes
+          ${{ steps.changelog.outputs.CHANGES }}
 
-            ### AppImage (Recommended)
+          ## Installation
-            1. Download the AppImage below
-            2. Make it executable: `chmod +x SubMiner.AppImage`
-            3. Run: `./SubMiner.AppImage`
 
-            ### macOS
+          ### AppImage (Recommended)
-            1. Download `subminer-*.dmg`
+          1. Download the AppImage below
-            2. Open the DMG and drag `SubMiner.app` into `/Applications`
+          2. Make it executable: `chmod +x SubMiner.AppImage`
-            3. If needed, use the ZIP artifact as an alternative
+          3. Run: `./SubMiner.AppImage`
 
-            ### Manual Installation
+          ### macOS
-            See the [README](https://github.com/${{ github.repository }}#installation) for manual installation instructions.
+          1. Download `subminer-*.dmg`
+          2. Open the DMG and drag `SubMiner.app` into `/Applications`
+          3. If needed, use the ZIP artifact as an alternative
 
-            ### Optional Assets (config example + mpv plugin + rofi theme)
+          ### Manual Installation
-            1. Download `subminer-assets.tar.gz`
+          See the [README](https://github.com/${{ github.repository }}#installation) for manual installation instructions.
-            2. Extract and copy `config.example.jsonc` to `~/.config/SubMiner/config.jsonc`
-            3. Copy `plugin/subminer/` directory contents to `~/.config/mpv/scripts/`
-            4. Copy `plugin/subminer.conf` to `~/.config/mpv/script-opts/`
-            5. Copy `assets/themes/subminer.rasi` to:
-               - Linux: `~/.local/share/SubMiner/themes/subminer.rasi`
-               - macOS: `~/Library/Application Support/SubMiner/themes/subminer.rasi`
 
-            Note: the `subminer` wrapper script uses Bun (`#!/usr/bin/env bun`), so `bun` must be installed and on `PATH`.
+          ### Optional Assets (config example + mpv plugin + rofi theme)
-          files: |
+          1. Download `subminer-assets.tar.gz`
+          2. Extract and copy `config.example.jsonc` to `~/.config/SubMiner/config.jsonc`
+          3. Copy `plugin/subminer/` directory contents to `~/.config/mpv/scripts/`
+          4. Copy `plugin/subminer.conf` to `~/.config/mpv/script-opts/`
+          5. Copy `assets/themes/subminer.rasi` to:
+             - Linux: `~/.local/share/SubMiner/themes/subminer.rasi`
+             - macOS: `~/Library/Application Support/SubMiner/themes/subminer.rasi`
+
+          Note: the `subminer` wrapper script uses Bun (`#!/usr/bin/env bun`), so `bun` must be installed and on `PATH`.
+          EOF
+
+          if gh release view "${{ steps.version.outputs.VERSION }}" >/dev/null 2>&1; then
+            gh release edit "${{ steps.version.outputs.VERSION }}" \
+              --title "${{ steps.version.outputs.VERSION }}" \
+              --notes-file release-body.md \
+              --prerelease false
+          else
+            gh release create "${{ steps.version.outputs.VERSION }}" \
+              --title "${{ steps.version.outputs.VERSION }}" \
+              --notes-file release-body.md \
+              --prerelease false
+          fi
+
+          shopt -s nullglob
+          artifacts=(
             release/*.AppImage
             release/*.dmg
             release/*.zip
             release/*.tar.gz
             release/SHA256SUMS.txt
             dist/launcher/subminer
-          draft: false
+          )
-          prerelease: false
+
+          if [ "${#artifacts[@]}" -eq 0 ]; then
+            echo "No release artifacts found for upload."
+            exit 1
+          fi
+
+          for asset in "${artifacts[@]}"; do
+            gh release upload "${{ steps.version.outputs.VERSION }}" "$asset" --clobber
+          done

README.md

@@ -25,6 +25,7 @@
 SubMiner is an Electron overlay that sits on top of mpv. It turns your video player into a full sentence-mining workstation:
 
 - **Hover to look up** — Yomitan dictionary popups directly on subtitles
+- **Keyboard-driven lookup mode** — Navigate token-by-token, keep lookup open across tokens, and control popup scrolling/audio/mining without leaving the overlay
 - **One-key mining** — Creates Anki cards with sentence, audio, screenshot, and translation
 - **Instant auto-enrichment** — Optional local AnkiConnect proxy enriches new Yomitan cards immediately
 - **Reading annotations** — Combines N+1 targeting, frequency-dictionary highlighting, and JLPT underlining while you read

backlog/milestones/m-0 - codebase-health-remediation.md

@@ -0,0 +1,8 @@
+---
+id: m-0
+title: 'Codebase Health Remediation'
+---
+
+## Description
+
+Follow-up work from the March 6, 2026 codebase review: strengthen the runnable test gate, remove confirmed dead architecture, and continue decomposition of oversized runtime entrypoints.

backlog/tasks/task-71 - Anki-integration-add-local-AnkiConnect-proxy-transport-for-push-based-auto-enrichment.md

@@ -6,7 +6,7 @@ title: >-
 status: Done
 assignee: []
 created_date: '2026-02-28 02:38'
-updated_date: '2026-02-28 22:36'
+updated_date: '2026-03-04 13:55'
 labels: []
 dependencies: []
 references:
@@ -49,4 +49,10 @@ Risk/impact context:
 
 Completed implementation in branch working tree; ready to merge once local changes are committed and test gate passes.
 
+Follow-up fix (2026-03-04):
+
+- Updated bundled Yomitan server-sync behavior to target `profileCurrent` instead of hardcoded `profiles[0]`.
+- Added proxy-mode force override so bundled Yomitan always points at SubMiner proxy URL when `ankiConnect.proxy.enabled=true`; this ensures mined cards pass through proxy and trigger auto-enrichment.
+- Added regression tests for blocked existing-server case and force-override injection path.
+
 <!-- SECTION:FINAL_SUMMARY:END -->

backlog/tasks/task-77 - Subtitle-hover-auto-pause-config-and-runtime-behavior.md

@@ -4,7 +4,7 @@ title: 'Subtitle hover: auto-pause playback with config toggle'
 status: Done
 assignee: []
 created_date: '2026-02-28 22:43'
-updated_date: '2026-02-28 22:43'
+updated_date: '2026-03-04 12:07'
 labels: []
 dependencies: []
 priority: medium
@@ -18,6 +18,7 @@ ordinal: 8000
 Add a user-facing subtitle config option to pause mpv playback when the cursor hovers subtitle text and resume playback when the cursor leaves.
 
 Scope:
+
 - New config key: `subtitleStyle.autoPauseVideoOnHover`.
 - Default should be enabled.
 - Hover pause/resume must not unpause if playback was already paused before hover.
@@ -42,4 +43,11 @@ Scope:
 
 Implemented `subtitleStyle.autoPauseVideoOnHover` with default `true`, wired through config defaults/resolution/types, renderer state/style, and mouse hover handlers. Added playback pause-state IPC (`getPlaybackPaused`) to avoid false resume when media was already paused. Added renderer hover behavior tests (including race/cancel case) and config/resolve tests. Updated config examples and docs (`README`, usage, shortcuts, mining workflow, configuration) to document default hover pause/resume behavior and disable path.
 
+Follow-up adjustments (2026-03-04):
+
+- Hover pause now resumes immediately when leaving subtitle text (no Yomitan-popup hover retention).
+- Added `subtitleStyle.autoPauseVideoOnYomitanPopup` (default `false`) to optionally keep playback paused while Yomitan popup is open, with auto-resume on close only when SubMiner initiated the popup pause.
+- Yomitan popup control keybinds added while popup is open: `J/K` scroll, `M` mine, `P` audio play, `[` previous audio variant, `]` next audio variant (within selected source).
+- Extension copy drift detection widened so popup runtime changes are reliably re-copied on launch (`popup.js`, `popup-main.js`, `display.js`, `display-audio.js`).
+
 <!-- SECTION:FINAL_SUMMARY:END -->

backlog/tasks/task-78 - Launcher-and-mpv-plugin-auto-start-pause-until-ready-and-single-start-guard.md

@@ -18,6 +18,7 @@ ordinal: 9000
 Add startup gating behavior for wrapper + mpv plugin flow so playback starts paused when visible overlay auto-start is enabled, then auto-resumes only after subtitle tokenization is ready.
 
 Scope:
+
 - Plugin option `auto_start_pause_until_ready` (default `yes`).
 - Launcher reads plugin runtime config and starts mpv paused when `auto_start=yes`, `auto_start_visible_overlay=yes`, and `auto_start_pause_until_ready=yes`.
 - Main process signals readiness via mpv script message after tokenized subtitle delivery.
@@ -43,6 +44,7 @@ Scope:
 <!-- SECTION:FINAL_SUMMARY:BEGIN -->
 
 Implemented startup pause gate across launcher/plugin/main runtime:
+
 - Added plugin runtime config parsing in launcher (`auto_start`, `auto_start_visible_overlay`, `auto_start_pause_until_ready`) and mpv start-paused behavior for eligible runs.
 - Added plugin auto-play gate state, timeout fallback, and readiness release via `subminer-autoplay-ready` script message.
 - Added main-process readiness signaling after tokenization delivery, including unpause fallback command path.

backlog/tasks/task-79 - Jimaku-modal-auto-close-after-successful-subtitle-load.md

@@ -18,10 +18,12 @@ ordinal: 10000
 Fix Jimaku modal UX so selecting a subtitle file closes the modal automatically once subtitle download+load succeeds.
 
 Current behavior:
+
 - Subtitle file downloads and loads into mpv.
 - Jimaku modal remains open until manual close.
 
 Expected behavior:
+
 - On successful `jimakuDownloadFile` result, close modal immediately.
 - Keep error behavior unchanged (stay open + show error).
 

backlog/tasks/task-80 - Jimaku-download-rename-subtitle-to-match-current-video.md

@@ -18,11 +18,13 @@ ordinal: 11000
 When user selects a Jimaku subtitle, save subtitle with filename derived from currently playing media filename instead of Jimaku release filename.
 
 Example:
+
 - Current media: `anime.mkv`
 - Downloaded subtitle extension: `.srt`
 - Saved subtitle path: `anime.ja.srt`
 
 Scope:
+
 - Apply in Jimaku download IPC path before writing file.
 - Preserve collision-avoidance behavior (suffix with jimaku entry id/counter when target exists).
 - Keep mpv load flow unchanged except using renamed path.

backlog/tasks/task-81 - Tokenization-performance-disable-yomitan-mecab-and-persistent-local-mecab.md

@@ -0,0 +1,58 @@
+---
+id: TASK-81
+title: 'Tokenization performance: disable Yomitan MeCab parser, gate local MeCab init, and add persistent MeCab process'
+status: Done
+assignee: []
+created_date: '2026-03-02 07:44'
+updated_date: '2026-03-02 20:44'
+labels: []
+dependencies: []
+priority: high
+ordinal: 9001
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+
+Reduce subtitle annotation latency by:
+
+- disabling Yomitan-side MeCab parser requests (`useMecabParser=false`);
+- initializing local MeCab only when POS-dependent annotations are enabled (N+1 / JLPT / frequency);
+- replacing per-line local MeCab process spawning with a persistent parser process that auto-shuts down after idle time and restarts on demand.
+
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+
+<!-- AC:BEGIN -->
+
+- [x] #1 Yomitan parse requests disable MeCab parser path.
+- [x] #2 MeCab warmup/init is skipped when all POS-dependent annotation toggles are off.
+- [x] #3 Local MeCab tokenizer uses persistent process across subtitle lines.
+- [x] #4 Persistent MeCab process auto-shuts down after idle timeout and restarts on next tokenize activity.
+- [x] #5 Tests cover parser flag, warmup gating, and persistent MeCab lifecycle behavior.
+
+<!-- AC:END -->
+
+## Final Summary
+
+<!-- SECTION:FINAL_SUMMARY:BEGIN -->
+
+Implemented tokenizer latency optimizations:
+
+- switched Yomitan parse requests to `useMecabParser: false`;
+- added annotation-aware MeCab initialization gating in runtime warmup flow;
+- added persistent local MeCab process (default idle shutdown: 30s) with queued requests, retry-on-process-end, idle auto-shutdown, and automatic restart on new work;
+- added regression tests for Yomitan parse flag, MeCab warmup gating, and persistent/idle lifecycle behavior;
+- fixed tokenization warmup gate so first-use warmup completion is sticky (`tokenizationWarmupCompleted`) and sequential `tokenizeSubtitle` calls no longer re-run Yomitan/dictionary warmup path;
+- added regression coverage in `src/main/runtime/composers/mpv-runtime-composer.test.ts` for sequential tokenize calls (`warmup` side effects run once);
+- post-review critical fix: treat Yomitan default-profile Anki server sync `no-change` as successful check, so `lastSyncedYomitanAnkiServer` is cached and expensive sync checks do not repeat on every subtitle line;
+- added regression assertion in `src/core/services/tokenizer/yomitan-parser-runtime.test.ts` for `updated: false` path returning sync success;
+- post-review performance fix: refactored POS enrichment to pre-index MeCab tokens by surface plus character-position overlap index, replacing repeated active-candidate filtering/full-scan behavior with direct overlap candidate lookup per token;
+- added regression tests in `src/core/services/tokenizer/parser-enrichment-stage.test.ts` for repeated distant-token scan access and repeated active-candidate filter scans; both fail on scan-based behavior and pass with indexed lookup;
+- post-review startup fix: moved JLPT/frequency dictionary initialization from synchronous FS APIs to async `fs/promises` path inspection/read and cooperative chunked entry processing to reduce main-thread stall risk during cold start;
+- post-review first-line latency fix: decoupled tokenization warmup gating so first `tokenizeSubtitle` only waits on Yomitan extension readiness, while MeCab check + dictionary prewarm continue in parallel background warmups;
+- validated with targeted tests and `tsc --noEmit`.
+
+<!-- SECTION:FINAL_SUMMARY:END -->

backlog/tasks/task-82 - Subtitle-frequency-highlighting-fixes-for-noisy-readings-and-known-token-color-priority.md

@@ -0,0 +1,60 @@
+---
+id: TASK-82
+title: 'Subtitle frequency highlighting: fix noisy Yomitan readings and restore known/N+1 color priority'
+status: Done
+assignee: []
+created_date: '2026-03-02 20:10'
+updated_date: '2026-03-02 01:44'
+labels: []
+dependencies: []
+priority: high
+ordinal: 9002
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+
+Address frequency-highlighting regressions:
+
+- tokens like `断じて` missed rank assignment when Yomitan merged-token reading was truncated/noisy;
+- known/N+1 tokens were incorrectly colored by frequency color instead of known/N+1 color.
+
+Expected behavior:
+
+- known/N+1 color always wins;
+- if token is frequent and within `topX`, frequency rank label can still appear on hover/metadata.
+
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+
+<!-- AC:BEGIN -->
+
+- [x] #1 Frequency lookup succeeds for noisy/truncated merged-token readings via robust fallback behavior.
+- [x] #2 Merged-token reading normalization restores missing kana suffixes where safe (`headword === surface` path).
+- [x] #3 Known/N+1 tokens keep known/N+1 color classes; frequency color class does not override them.
+- [x] #4 Frequency rank hover label remains available for in-range frequent tokens, including known/N+1.
+- [x] #5 Regression tests added for tokenizer and renderer behavior.
+
+<!-- AC:END -->
+
+## Final Summary
+
+<!-- SECTION:FINAL_SUMMARY:BEGIN -->
+
+Implemented and validated:
+
+- tokenizer now normalizes selected Yomitan merged-token readings by appending missing trailing kana suffixes when safe (`headword === surface`);
+- frequency lookup now does lazy fallback: requests `{term, reading}` first, and only requests `{term, reading: null}` for misses;
+- this removes eager `(term, null)` payload inflation on medium-frequency lines and reduces extension RPC payload/load;
+- renderer restored known/N+1 color priority over frequency class coloring;
+- frequency rank label display remains available for frequent known/N+1 tokens;
+- added regression tests covering noisy-reading fallback, lazy fallback-query behavior, and renderer class/label precedence.
+
+Related commits:
+
+- `17a417e` (`fix(subtitle): improve frequency highlight reliability`)
+- `79f37f3` (`fix(subtitle): prioritize known and n+1 colors over frequency`)
+
+<!-- SECTION:FINAL_SUMMARY:END -->

backlog/tasks/task-83 - Jellyfin-subtitle-delay-shift-to-adjacent-cue-without-seek-jumps.md

@@ -0,0 +1,53 @@
+---
+id: TASK-83
+title: 'Jellyfin subtitle delay: shift to adjacent cue without seek jumps'
+status: Done
+assignee: []
+created_date: '2026-03-02 00:06'
+updated_date: '2026-03-02 00:06'
+labels: []
+dependencies: []
+priority: high
+ordinal: 9003
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+
+Add keybinding-friendly special commands that shift `sub-delay` to align current subtitle start with next/previous cue start, without `sub-seek` probing (avoid playback jump).
+
+Scope:
+
+- add special commands for next/previous line alignment;
+- compute delta from active subtitle cue timeline (external subtitle file/URL, including Jellyfin-delivered URLs);
+- apply `add sub-delay <delta>` and show OSD value;
+- keep existing proxy OSD behavior for direct `sub-delay` keybinding commands.
+
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+
+<!-- AC:BEGIN -->
+
+- [x] #1 New special commands exist for subtitle-delay shift to next/previous cue boundary.
+- [x] #2 Shift logic parses active external subtitle source timings (SRT/VTT/ASS) and computes delta from current `sub-start`.
+- [x] #3 Runtime applies delay shift without `sub-seek` and shows OSD feedback.
+- [x] #4 Direct `sub-delay` proxy commands also show OSD current value.
+- [x] #5 Tests added for cue parsing/shift behavior and IPC dispatch wiring.
+
+<!-- AC:END -->
+
+## Final Summary
+
+<!-- SECTION:FINAL_SUMMARY:BEGIN -->
+
+Implemented no-jump subtitle-delay alignment commands:
+
+- added `__sub-delay-next-line` and `__sub-delay-prev-line` special commands;
+- added `createShiftSubtitleDelayToAdjacentCueHandler` to parse cue start times from active external subtitle source and apply `add sub-delay` delta from current `sub-start`;
+- wired command handling through IPC runtime deps into main runtime;
+- retained/extended OSD proxy feedback for `sub-delay` keybindings;
+- updated configuration docs and added regression tests for subtitle-delay shift and IPC command routing.
+
+<!-- SECTION:FINAL_SUMMARY:END -->

backlog/tasks/task-84 - Docs-Plausible-endpoint-uses-api-event-path.md

@@ -0,0 +1,37 @@
+---
+id: TASK-84
+title: 'Docs Plausible endpoint uses /api/event path'
+status: Done
+assignee: []
+created_date: '2026-03-03 00:00'
+updated_date: '2026-03-03 00:00'
+labels: []
+dependencies: []
+priority: medium
+ordinal: 12000
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+
+Fix VitePress docs Plausible tracker config to post to hosted worker API event endpoint instead of worker root URL.
+
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+
+<!-- AC:BEGIN -->
+
+- [x] #1 Docs theme Plausible `endpoint` points to `https://worker.subminer.moe/api/event`.
+- [x] #2 Plausible docs test asserts `/api/event` endpoint path.
+
+<!-- AC:END -->
+
+## Final Summary
+
+<!-- SECTION:FINAL_SUMMARY:BEGIN -->
+
+Updated docs Plausible tracker endpoint to `https://worker.subminer.moe/api/event` and updated regression test expectation accordingly.
+
+<!-- SECTION:FINAL_SUMMARY:END -->

backlog/tasks/task-84 - Migrate-AniSkip-metadatalookup-orchestration-to-launcher-Electron.md

@@ -0,0 +1,70 @@
+---
+id: TASK-84
+title: Migrate AniSkip metadata+lookup orchestration to launcher/Electron
+status: Done
+assignee:
+  - Codex
+created_date: '2026-03-03 08:31'
+updated_date: '2026-03-03 08:35'
+labels:
+  - enhancement
+  - aniskip
+  - launcher
+  - mpv-plugin
+dependencies: []
+references:
+  - launcher/aniskip-metadata.ts
+  - launcher/mpv.ts
+  - plugin/subminer/aniskip.lua
+  - plugin/subminer/options.lua
+  - plugin/subminer/state.lua
+  - plugin/subminer/lifecycle.lua
+  - plugin/subminer/messages.lua
+  - plugin/subminer.conf
+  - launcher/aniskip-metadata.test.ts
+documentation:
+  - docs/mpv-plugin.md
+  - launcher/aniskip-metadata.ts
+  - plugin/subminer/aniskip.lua
+  - docs/architecture.md
+priority: medium
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+
+Move AniSkip MAL/title-to-MAL lookup and intro payload resolution from mpv Lua to launcher Electron flow, while keeping mpv-side intro skip UX and chapter/chapter prompt behavior in plugin. Launcher should infer/analyze file metadata, fetch AniSkip payload when launching files, and pass resolved skip window via script options; plugin should trust launcher payload and fall back only when absent.
+
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+
+<!-- AC:BEGIN -->
+
+- [x] #1 Launcher infers AniSkip metadata for file targets using existing guessit/fallback logic and performs AniSkip MAL + payload resolution during mpv startup.
+- [x] #2 Launcher injects script options containing resolved MAL id and intro window fields (or explicit lookup-failure status) into mpv startup.
+- [x] #3 Lua plugin consumes launcher-provided AniSkip intro data and skips all network lookups when payload is present.
+- [x] #4 Standalone mpv/plugin usage without launcher payload continues to function using existing async in-plugin lookup path.
+- [x] #5 Docs and defaults are updated to document new script-option contract.
+- [x] #6 Launcher tests cover payload generation contract and fallback behavior where metadata is unavailable.
+<!-- AC:END -->
+
+## Implementation Plan
+
+<!-- SECTION:PLAN:BEGIN -->
+
+1. Add launcher-side AniSkip payload resolution helpers in launcher/aniskip-metadata.ts (MAL prefix lookup + AniSkip payload fetch + result normalization).
+2. Wire launcher/mpv.ts + buildSubminerScriptOpts to pass resolved AniSkip fields/mode in --script-opts for file playback.
+3. Update plugin/subminer/aniskip.lua plus options/state to consume injected payload: if intro_start/end present, apply immediately and skip network lookup; otherwise retain existing async behavior.
+4. Ensure fallback for standalone mpv usage remains intact for no-launcher/manual refresh.
+5. Add/update tests/docs/config references for new script-opt contract and edge cases.
+<!-- SECTION:PLAN:END -->
+
+## Final Summary
+
+<!-- SECTION:FINAL_SUMMARY:BEGIN -->
+
+Executed end-to-end migration so launcher resolves AniSkip title/MAL/payload before mpv start and injects it via --script-opts. Plugin now parses and consumes launcher payload (JSON/url/base64), applies OP intro from payload, tracks payload metadata in state, and keeps legacy async lookup path for non-launcher/absent payload playback. Added launcher config key aniskip_payload and updated launcher/aniskip-metadata tests for resolve/payload behavior and contract validation.
+
+<!-- SECTION:FINAL_SUMMARY:END -->

backlog/tasks/task-85 - Remove-docs-plausible-analytics-integration.md

@@ -0,0 +1,38 @@
+---
+id: TASK-85
+title: 'Remove docs Plausible analytics integration'
+status: Done
+assignee: []
+created_date: '2026-03-03 00:00'
+updated_date: '2026-03-03 00:00'
+labels: []
+dependencies: []
+priority: medium
+ordinal: 12001
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+
+Remove Plausible analytics integration from docs theme and dependency graph. Keep docs build/runtime analytics-free.
+
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+
+<!-- AC:BEGIN -->
+
+- [x] #1 Docs theme no longer imports or initializes Plausible tracker.
+- [x] #2 `@plausible-analytics/tracker` removed from dependencies and lockfile.
+- [x] #3 Docs analytics test reflects absence of Plausible wiring.
+
+<!-- AC:END -->
+
+## Final Summary
+
+<!-- SECTION:FINAL_SUMMARY:BEGIN -->
+
+Deleted Plausible runtime wiring from VitePress theme, removed tracker package via `bun remove`, and updated docs test to assert no Plausible integration remains.
+
+<!-- SECTION:FINAL_SUMMARY:END -->

backlog/tasks/task-86 - Renderer-keyboard-driven-Yomitan-lookup-mode-and-popup-key-forwarding.md

@@ -0,0 +1,68 @@
+---
+id: TASK-86
+title: 'Renderer: keyboard-driven Yomitan lookup mode and popup key forwarding'
+status: Done
+assignee:
+  - Codex
+created_date: '2026-03-04 13:40'
+updated_date: '2026-03-05 11:30'
+labels:
+  - enhancement
+  - renderer
+  - yomitan
+dependencies:
+  - TASK-77
+references:
+  - src/renderer/handlers/keyboard.ts
+  - src/renderer/handlers/mouse.ts
+  - src/renderer/renderer.ts
+  - src/renderer/state.ts
+  - src/renderer/yomitan-popup.ts
+  - src/core/services/overlay-window.ts
+  - src/preload.ts
+  - src/shared/ipc/contracts.ts
+  - src/types.ts
+  - vendor/yomitan/js/app/frontend.js
+  - vendor/yomitan/js/app/popup.js
+  - vendor/yomitan/js/display/display.js
+  - vendor/yomitan/js/display/popup-main.js
+  - vendor/yomitan/js/display/display-audio.js
+documentation:
+  - README.md
+  - docs/usage.md
+  - docs/shortcuts.md
+priority: medium
+ordinal: 13000
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+
+Add true keyboard-driven token lookup flow in overlay:
+
+- Toggle keyboard token-selection mode and navigate tokens by keyboard (`Arrow` + `HJKL`).
+- Toggle Yomitan lookup window for selected token via fixed accelerator (`Ctrl/Cmd+Y`) without requiring mouse click.
+- Preserve keyboard-only workflow while popup is open by forwarding popup keys (`J/K`, `M`, `P`, `[`, `]`) and restoring overlay focus on popup close.
+- Ensure selection styling and hover metadata tooltips (frequency/JLPT) work for keyboard-selected token.
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+
+<!-- AC:BEGIN -->
+
+- [x] #1 Keyboard mode toggle exists and shows visual selection outline for active token.
+- [x] #2 Navigation works via arrows and vim keys while keyboard mode is enabled.
+- [x] #3 Lookup window toggles from selected token with `Ctrl/Cmd+Y`; close path restores overlay keyboard focus.
+- [x] #4 Popup-local controls work via keyboard forwarding (`J/K`, `M`, `P`, `[`, `]`), including mine action.
+- [x] #5 Frequency/JLPT hover tags render for keyboard-selected token.
+- [x] #6 Renderer/runtime tests cover new visibility/selection behavior, and docs are updated.
+<!-- AC:END -->
+
+## Final Summary
+
+<!-- SECTION:FINAL_SUMMARY:BEGIN -->
+
+Implemented keyboard-driven Yomitan workflow end-to-end in renderer + bundled Yomitan runtime bridge. Added overlay-level keyboard mode state, token selection sync, lookup toggle routing, popup command forwarding, and focus recovery after popup close. Follow-up fixes kept lookup open while moving between tokens, made popup-local `J/K` and `ArrowUp/ArrowDown` scroll work from overlay-owned focus with key repeat, skipped keyboard/token annotation flow for parser groups that have no dictionary-backed headword, and preserved paused playback when token navigation jumps across subtitle lines. Updated user docs/README to document the final shortcut behavior.
+
+<!-- SECTION:FINAL_SUMMARY:END -->

backlog/tasks/task-87 - Codebase-health-harden-verification-and-retire-dead-architecture-identified-in-the-March-2026-review.md

@@ -0,0 +1,71 @@
+---
+id: TASK-87
+title: >-
+  Codebase health: harden verification and retire dead architecture identified
+  in the March 2026 review
+status: To Do
+assignee: []
+created_date: '2026-03-06 03:19'
+updated_date: '2026-03-06 03:20'
+labels:
+  - tech-debt
+  - tests
+  - maintainability
+milestone: m-0
+dependencies: []
+references:
+  - package.json
+  - README.md
+  - src/main.ts
+  - src/anki-integration.ts
+  - src/core/services/immersion-tracker-service.test.ts
+  - src/translators/index.ts
+  - src/subsync/engines.ts
+  - src/subtitle/pipeline.ts
+documentation:
+  - docs/reports/2026-02-22-task-100-dead-code-report.md
+priority: high
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+
+Track the remediation work from the March 6, 2026 code review. The review found that the default test gate only exercises 53 of 241 test files, the dedicated subtitle test lane is a no-op, SQLite-backed immersion tracking tests are conditionally skipped in the standard Bun run, src/main.ts still contains a large dead-symbol backlog, several registry/pipeline modules appear unreferenced from live execution paths, and src/anki-integration.ts remains an oversized orchestration file. This parent task should coordinate a safe sequence: improve verification first, then remove dead code and continue decomposition with good test coverage in place.
+
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+
+<!-- AC:BEGIN -->
+
+- [ ] #1 Child tasks are created for each remediation workstream with explicit dependencies and enough context for an isolated agent to execute them.
+- [ ] #2 The parent task records the recommended sequencing and parallelization strategy so replacement agents can resume without conversation history.
+- [ ] #3 Completion of the parent task leaves the repository with a materially more trustworthy test gate, less dead architecture, and clearer ownership boundaries for the main runtime and Anki integration surfaces.
+<!-- AC:END -->
+
+## Implementation Plan
+
+<!-- SECTION:PLAN:BEGIN -->
+
+Recommended sequencing:
+
+1. Run TASK-87.1, TASK-87.2, TASK-87.3, and TASK-87.7 first. These are the safety-net and tooling tasks and can largely proceed in parallel.
+2. Start TASK-87.4 once TASK-87.1 lands so src/main.ts cleanup happens under a more trustworthy test matrix.
+3. Start TASK-87.5 after TASK-87.1 and TASK-87.2 so dead subsync/pipeline cleanup happens with stronger subtitle and runtime verification.
+4. Start TASK-87.6 after TASK-87.1 so Anki refactors happen with broader default coverage in place.
+5. Keep PRs focused: do not combine verification work with architectural cleanup unless a narrow dependency requires it.
+
+Parallelization guidance:
+
+- Wave 1 parallel: TASK-87.1, TASK-87.2, TASK-87.3, TASK-87.7
+- Wave 2 parallel: TASK-87.4, TASK-87.5, TASK-87.6
+
+Shared review context to restate in child tasks:
+
+- Standard test scripts currently reference only 53 unique test files out of 241 discovered test and type-test files under src/ and launcher/.
+- test:subtitle is currently a placeholder echo even though subtitle sync is a user-facing feature.
+- SQLite-backed immersion tracker tests are conditionally skipped in the standard Bun run.
+- src/main.ts trips many noUnusedLocals/noUnusedParameters diagnostics.
+- src/translators/index.ts, src/subsync/engines.ts, src/subtitle/pipeline.ts, src/tokenizers/index.ts, and src/token-mergers/index.ts appeared unreferenced during review and must be re-verified before deletion.
+<!-- SECTION:PLAN:END -->

backlog/tasks/task-87.1 - Testing-workflow-make-standard-test-commands-reflect-the-maintained-test-surface.md

@@ -0,0 +1,53 @@
+---
+id: TASK-87.1
+title: >-
+  Testing workflow: make standard test commands reflect the maintained test
+  surface
+status: To Do
+assignee: []
+created_date: '2026-03-06 03:19'
+updated_date: '2026-03-06 03:21'
+labels:
+  - tests
+  - maintainability
+milestone: m-0
+dependencies: []
+references:
+  - package.json
+  - src/main-entry-runtime.test.ts
+  - src/anki-integration/anki-connect-proxy.test.ts
+  - src/main/runtime/jellyfin-remote-playback.test.ts
+  - src/main/runtime/registry.test.ts
+documentation:
+  - docs/reports/2026-02-22-task-100-dead-code-report.md
+parent_task_id: TASK-87
+priority: high
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+
+The current package scripts hand-enumerate a small subset of test files, which leaves the standard green signal misleading. A local audit found 241 test/type-test files under src/ and launcher/, but only 53 unique files referenced by the standard package.json test scripts. This task should redesign the runnable test matrix so maintained tests are either executed by the standard commands or intentionally excluded through a documented rule, instead of silently drifting out of coverage.
+
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+
+<!-- AC:BEGIN -->
+
+- [ ] #1 The repository has a documented and reproducible test matrix for standard development commands, including which suites belong in the default lane versus slower or environment-specific lanes.
+- [ ] #2 The standard test entrypoints stop relying on a brittle hand-maintained allowlist for the currently covered unit and integration suites, or an explicit documented mechanism exists that prevents silent omission of new tests.
+- [ ] #3 Representative tests that were previously outside the standard lane from src/main/runtime, src/anki-integration, and entry/runtime surfaces are executed by an automated command and included in the documented matrix.
+- [ ] #4 Documentation for contributors explains which command to run for fast verification, full verification, and environment-specific verification.
+<!-- AC:END -->
+
+## Implementation Plan
+
+<!-- SECTION:PLAN:BEGIN -->
+
+1. Inventory the current test surface under src/ and launcher/ and compare it to package.json scripts to classify fast, full, slow, and environment-specific suites.
+2. Replace or reduce the brittle hand-maintained allowlist so new maintained tests do not silently miss the standard matrix.
+3. Update contributor docs with the intended fast/full/environment-specific commands.
+4. Verify the new matrix by running the relevant commands and by demonstrating at least one previously omitted runtime/Anki/entry test now belongs to an automated lane.
+<!-- SECTION:PLAN:END -->

backlog/tasks/task-87.2 - Subtitle-sync-verification-replace-the-no-op-subtitle-lane-with-real-automated-coverage.md

@@ -0,0 +1,53 @@
+---
+id: TASK-87.2
+title: >-
+  Subtitle sync verification: replace the no-op subtitle lane with real
+  automated coverage
+status: To Do
+assignee: []
+created_date: '2026-03-06 03:19'
+updated_date: '2026-03-06 03:21'
+labels:
+  - tests
+  - subsync
+milestone: m-0
+dependencies: []
+references:
+  - package.json
+  - README.md
+  - src/core/services/subsync.ts
+  - src/core/services/subsync.test.ts
+  - src/subsync/utils.ts
+documentation:
+  - docs/reports/2026-02-22-task-100-dead-code-report.md
+parent_task_id: TASK-87
+priority: high
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+
+SubMiner advertises subtitle syncing with alass and ffsubsync, but the dedicated test:subtitle command currently does not run any tests. There is already lower-level coverage in src/core/services/subsync.test.ts, but the test matrix and contributor-facing commands do not reflect that reality. This task should replace the no-op lane with real verification, align scripts with the existing subsync test surface, and make the user-facing docs honest about how subtitle sync is verified.
+
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+
+<!-- AC:BEGIN -->
+
+- [ ] #1 The test:subtitle entrypoint runs real automated verification instead of echoing a placeholder message.
+- [ ] #2 The subtitle verification lane covers both alass and ffsubsync behavior, including at least one non-happy-path scenario relevant to current functionality.
+- [ ] #3 Contributor-facing documentation points to the real subtitle verification command and no longer implies a dedicated test lane exists when it does not.
+- [ ] #4 The resulting verification strategy integrates cleanly with the repository-wide test matrix without duplicating or hiding existing subsync coverage.
+<!-- AC:END -->
+
+## Implementation Plan
+
+<!-- SECTION:PLAN:BEGIN -->
+
+1. Audit the existing subtitle-sync test surface, especially src/core/services/subsync.test.ts, and decide whether test:subtitle should reuse or regroup that coverage.
+2. Replace the placeholder script with a real automated command and keep the matrix legible alongside TASK-87.1 work.
+3. Update README or related docs so the advertised subtitle verification path matches reality.
+4. Verify both alass and ffsubsync behavior remain covered by the resulting lane.
+<!-- SECTION:PLAN:END -->

backlog/tasks/task-87.3 - Immersion-tracking-verification-make-SQLite-backed-persistence-tests-visible-and-reproducible.md

@@ -0,0 +1,52 @@
+---
+id: TASK-87.3
+title: >-
+  Immersion tracking verification: make SQLite-backed persistence tests visible
+  and reproducible
+status: To Do
+assignee: []
+created_date: '2026-03-06 03:19'
+updated_date: '2026-03-06 03:21'
+labels:
+  - tests
+  - immersion-tracking
+milestone: m-0
+dependencies: []
+references:
+  - src/core/services/immersion-tracker-service.test.ts
+  - src/core/services/immersion-tracker/storage-session.test.ts
+  - src/core/services/immersion-tracker-service.ts
+  - package.json
+documentation:
+  - docs/reports/2026-02-22-task-100-dead-code-report.md
+parent_task_id: TASK-87
+priority: medium
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+
+The immersion tracker is persistence-heavy, but its SQLite-backed tests are conditionally skipped in the standard Bun run when node:sqlite support is unavailable. That creates a blind spot around session finalization, telemetry persistence, and retention behavior. This task should establish a reliable automated verification path for the database-backed cases and make the prerequisite/runtime behavior explicit to contributors and CI.
+
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+
+<!-- AC:BEGIN -->
+
+- [ ] #1 Database-backed immersion tracking tests run in at least one documented automated command that is practical for contributors or CI to execute.
+- [ ] #2 If the current runtime cannot execute the SQLite-backed tests, the repository exposes that limitation clearly instead of silently reporting a misleading green result.
+- [ ] #3 Contributor-facing documentation explains how to run the immersion tracker verification lane and any environment prerequisites it depends on.
+- [ ] #4 The resulting verification covers session persistence or finalization behavior that is not exercised by the pure seam tests alone.
+<!-- AC:END -->
+
+## Implementation Plan
+
+<!-- SECTION:PLAN:BEGIN -->
+
+1. Confirm which SQLite-backed immersion tests are currently skipped and why in the standard Bun environment.
+2. Establish a reproducible command or lane for the DB-backed cases, or make the unsupported-runtime limitation explicit and actionable.
+3. Document prerequisites and expected behavior for contributors and CI.
+4. Verify at least one persistence/finalization path beyond the seam tests is exercised by the new lane.
+<!-- SECTION:PLAN:END -->

backlog/tasks/task-87.4 - Runtime-composition-root-remove-dead-symbols-and-tighten-module-boundaries-in-src-main.ts.md

@@ -0,0 +1,53 @@
+---
+id: TASK-87.4
+title: >-
+  Runtime composition root: remove dead symbols and tighten module boundaries in
+  src/main.ts
+status: To Do
+assignee: []
+created_date: '2026-03-06 03:19'
+updated_date: '2026-03-06 03:21'
+labels:
+  - tech-debt
+  - runtime
+  - maintainability
+milestone: m-0
+dependencies:
+  - TASK-87.1
+references:
+  - src/main.ts
+  - src/main/runtime
+  - package.json
+documentation:
+  - docs/reports/2026-02-22-task-100-dead-code-report.md
+parent_task_id: TASK-87
+priority: high
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+
+A noUnusedLocals/noUnusedParameters compile pass reports a large concentration of dead imports and dead locals in src/main.ts. The file is also far beyond the repo’s preferred size guideline, which makes the runtime composition root difficult to review and easy to break. This task should remove confirmed dead symbols, continue extracting coherent slices where that improves readability, and leave the entrypoint materially easier to understand without changing behavior.
+
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+
+<!-- AC:BEGIN -->
+
+- [ ] #1 src/main.ts no longer emits dead-symbol diagnostics under a noUnusedLocals/noUnusedParameters compile pass for the areas touched by this cleanup.
+- [ ] #2 Unused imports, destructured values, and stale locals identified in the current composition root are removed or relocated without behavior changes.
+- [ ] #3 The resulting composition root has clearer ownership boundaries for at least one runtime slice that is currently buried in the monolith.
+- [ ] #4 Relevant runtime and startup verification commands pass after the cleanup, and any command changes are documented if needed.
+<!-- AC:END -->
+
+## Implementation Plan
+
+<!-- SECTION:PLAN:BEGIN -->
+
+1. Re-run the noUnusedLocals/noUnusedParameters compile pass and capture the src/main.ts diagnostics cluster before editing.
+2. Remove dead imports, destructured values, and stale locals in small reviewable slices; extract a coherent helper/module only where that materially reduces coupling.
+3. Keep changes behavior-preserving and avoid mixing unrelated cleanup outside src/main.ts unless required to compile.
+4. Verify with the updated runtime/startup test commands from TASK-87.1 plus a noUnused compile pass.
+<!-- SECTION:PLAN:END -->

backlog/tasks/task-87.5 - Dead-architecture-cleanup-delete-unused-registry-and-pipeline-modules-that-are-off-the-live-path.md

@@ -0,0 +1,57 @@
+---
+id: TASK-87.5
+title: >-
+  Dead architecture cleanup: delete unused registry and pipeline modules that
+  are off the live path
+status: To Do
+assignee: []
+created_date: '2026-03-06 03:20'
+updated_date: '2026-03-06 03:21'
+labels:
+  - tech-debt
+  - dead-code
+milestone: m-0
+dependencies:
+  - TASK-87.1
+  - TASK-87.2
+references:
+  - src/translators/index.ts
+  - src/subsync/engines.ts
+  - src/subtitle/pipeline.ts
+  - src/tokenizers/index.ts
+  - src/token-mergers/index.ts
+  - src/core/services/subsync.ts
+  - src/core/services/tokenizer.ts
+documentation:
+  - docs/reports/2026-02-22-task-100-dead-code-report.md
+parent_task_id: TASK-87
+priority: high
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+
+The review found several modules that appear self-contained but unused from the application’s live execution paths: src/translators/index.ts, src/subsync/engines.ts, src/subtitle/pipeline.ts, src/tokenizers/index.ts, and src/token-mergers/index.ts. At the same time, the real runtime behavior is implemented elsewhere. This task should verify those modules are truly unused, remove or consolidate them, and clean up any stale exports, docs, or tests so contributors are not misled by duplicate architecture.
+
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+
+<!-- AC:BEGIN -->
+
+- [ ] #1 Each candidate module identified in the review is either removed as dead code or justified and reconnected to a real supported execution path.
+- [ ] #2 Any stale exports, imports, or tests associated with the removed or consolidated modules are cleaned up so the codebase has a single obvious path for the affected behavior.
+- [ ] #3 The cleanup does not regress live tokenization or subtitle sync behavior and the relevant verification commands remain green.
+- [ ] #4 Contributor-facing documentation or internal notes no longer imply that removed duplicate architecture is part of the current design.
+<!-- AC:END -->
+
+## Implementation Plan
+
+<!-- SECTION:PLAN:BEGIN -->
+
+1. Re-verify each candidate module is off the live path by tracing imports from current runtime entrypoints before deleting anything.
+2. Remove or consolidate truly dead modules and clean associated exports/imports/tests so only the supported path remains obvious.
+3. Pay special attention to subtitle sync and tokenization surfaces, since duplicate architecture exists near active code.
+4. Verify the relevant tokenization and subsync commands/tests still pass and update any stale docs or notes.
+<!-- SECTION:PLAN:END -->

backlog/tasks/task-87.6 - Anki-integration-maintainability-continue-decomposing-the-oversized-orchestration-layer.md

@@ -0,0 +1,57 @@
+---
+id: TASK-87.6
+title: >-
+  Anki integration maintainability: continue decomposing the oversized
+  orchestration layer
+status: To Do
+assignee: []
+created_date: '2026-03-06 03:20'
+updated_date: '2026-03-06 03:21'
+labels:
+  - tech-debt
+  - anki
+  - maintainability
+milestone: m-0
+dependencies:
+  - TASK-87.1
+references:
+  - src/anki-integration.ts
+  - src/anki-integration/field-grouping-workflow.ts
+  - src/anki-integration/note-update-workflow.ts
+  - src/anki-integration/card-creation.ts
+  - src/anki-integration/anki-connect-proxy.ts
+  - src/anki-integration.test.ts
+documentation:
+  - docs/reports/2026-02-22-task-100-dead-code-report.md
+  - docs/anki-integration.md
+parent_task_id: TASK-87
+priority: medium
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+
+src/anki-integration.ts remains an oversized orchestration file even after earlier extractions. It still mixes config normalization, polling setup, media generation, duplicate resolution, field grouping workflows, and user feedback coordination in one class. This task should continue the decomposition so the remaining orchestration surface is smaller and easier to reason about, while preserving existing Anki, proxy, field grouping, and note update behavior.
+
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+
+<!-- AC:BEGIN -->
+
+- [ ] #1 The responsibilities currently concentrated in src/anki-integration.ts are split into clearer modules or services with narrow ownership boundaries.
+- [ ] #2 The resulting orchestration surface is materially smaller and easier to review, with at least one mixed-responsibility cluster extracted behind a well-named interface.
+- [ ] #3 Existing Anki integration behavior remains covered by automated verification, including note update, field grouping, and proxy-related flows that the refactor touches.
+- [ ] #4 Any developer-facing docs or notes needed to understand the new structure are updated in the same task.
+<!-- AC:END -->
+
+## Implementation Plan
+
+<!-- SECTION:PLAN:BEGIN -->
+
+1. Map the remaining responsibility clusters inside src/anki-integration.ts and choose one or more extraction seams that reduce mixed concerns without changing behavior.
+2. Move logic behind narrow interfaces/modules rather than creating another giant helper; keep orchestration readable.
+3. Preserve coverage for field grouping, note update, proxy, and card creation flows touched by the refactor.
+4. Update docs or internal notes if the new structure changes where contributors should look for a given behavior.
+<!-- SECTION:PLAN:END -->

backlog/tasks/task-87.7 - Developer-workflow-hygiene-make-docs-watch-reproducible-and-remove-stale-small-surface-drift.md

@@ -0,0 +1,51 @@
+---
+id: TASK-87.7
+title: >-
+  Developer workflow hygiene: make docs watch reproducible and remove stale
+  small-surface drift
+status: To Do
+assignee: []
+created_date: '2026-03-06 03:20'
+updated_date: '2026-03-06 03:21'
+labels:
+  - tooling
+  - tech-debt
+milestone: m-0
+dependencies: []
+references:
+  - package.json
+  - bun.lock
+  - src/anki-integration/field-grouping-workflow.ts
+documentation:
+  - docs/reports/2026-02-22-task-100-dead-code-report.md
+parent_task_id: TASK-87
+priority: low
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+
+The review found a few low-risk but recurring hygiene issues: docs:watch depends on bunx concurrently even though concurrently is not declared in package metadata, and small stale API surface remains after recent refactors, such as unused parameters in field-grouping workflow code. This task should make the developer workflow reproducible and clean up low-risk stale symbols that do not warrant a dedicated architecture task.
+
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+
+<!-- AC:BEGIN -->
+
+- [ ] #1 The docs:watch workflow runs through declared project tooling or is rewritten to avoid undeclared dependencies.
+- [ ] #2 Small stale symbols or parameters identified during the review outside the main composition-root cleanup are removed without behavior changes.
+- [ ] #3 Any contributor-facing command changes are reflected in repository documentation.
+- [ ] #4 The cleanup remains scoped to low-risk workflow and hygiene fixes rather than expanding into large architectural refactors.
+<!-- AC:END -->
+
+## Implementation Plan
+
+<!-- SECTION:PLAN:BEGIN -->
+
+1. Fix the docs:watch workflow so it relies on declared project tooling or an equivalent checked-in command path.
+2. Clean up low-risk stale symbols surfaced by the review outside the main.ts architecture task, such as unused parameters left behind by refactors.
+3. Keep the task scoped: avoid pulling in main composition-root cleanup or larger Anki/runtime refactors.
+4. Verify the affected developer commands still work and document any usage changes.
+<!-- SECTION:PLAN:END -->

config.example.jsonc

@@ -88,6 +88,7 @@
     "alass_path": "", // Alass path setting.
     "ffsubsync_path": "", // Ffsubsync path setting.
     "ffmpeg_path": "", // Ffmpeg path setting.
+    "replace": true, // Replace active subtitle file when synchronization succeeds.
   }, // Subsync engine and executable paths.
 
   // ==========================================

docs/.vitepress/theme/index.ts

@@ -188,7 +188,9 @@ export default {
       });
     };
 
-    onMounted(render);
+    onMounted(() => {
+      render();
+    });
     watch(() => route.path, render);
   },
 };

docs/anki-integration.md

@@ -44,12 +44,15 @@ Polling mode uses the query `"deck:<your-deck>" added:1` to find recently added
 
 Then point Yomitan/clients to `http://127.0.0.1:8766` instead of `8765`.
 
-When SubMiner loads the bundled Yomitan extension, it also attempts to update the **default Yomitan profile** (`profiles[0].options.anki.server`) to the active SubMiner endpoint:
+When SubMiner loads the bundled Yomitan extension, it also attempts to update the **active bundled Yomitan profile** (`profiles[profileCurrent].options.anki.server`) to the active SubMiner endpoint:
 
 - proxy URL when `ankiConnect.proxy.enabled` is `true`
 - direct `ankiConnect.url` when proxy mode is disabled
 
-To avoid clobbering custom setups, this auto-update only changes the default profile when its current server is blank or the stock Yomitan default (`http://127.0.0.1:8765`).
+Server update behavior differs by mode:
+
+- Proxy mode (`ankiConnect.proxy.enabled: true`): SubMiner force-syncs the bundled active profile to the proxy URL so `addNote` traffic goes through the local proxy and auto-enrichment can trigger.
+- Direct mode (`ankiConnect.proxy.enabled: false`): SubMiner only replaces blank/default server values (`http://127.0.0.1:8765`) to avoid overwriting custom direct-server setups.
 
 For browser-based Yomitan or other external clients (for example Texthooker in a normal browser profile), set their Anki server to the same proxy URL separately: `http://127.0.0.1:8766` (or your configured `proxy.host` + `proxy.port`).
 
@@ -69,7 +72,7 @@ In Yomitan, go to Settings → Profile and:
 3. Set server to `http://127.0.0.1:8766` (or your configured proxy URL).
 4. Save and make that profile active when using SubMiner.
 
-This is only for non-bundled, external/browser Yomitan or other clients. The bundled profile auto-update logic only targets `profiles[0]` when it is blank or still default.
+This is only for non-bundled, external/browser Yomitan or other clients. Bundled Yomitan profile sync behavior is described above (force-sync in proxy mode, conservative sync in direct mode).
 
 ### Proxy Troubleshooting (quick checks)
 

docs/configuration.md

@@ -125,8 +125,8 @@ Control the minimum log level for runtime output:
 }
 ```
 
-| Option  | Values                              | Description                                      |
+| Option  | Values                                   | Description                                               |
-| ------- | ----------------------------------- | ------------------------------------------------ |
+| ------- | ---------------------------------------- | --------------------------------------------------------- |
 | `level` | `"debug"`, `"info"`, `"warn"`, `"error"` | Minimum log level for runtime logging (default: `"info"`) |
 
 ### Auto-Start Overlay
@@ -258,7 +258,8 @@ See `config.example.jsonc` for detailed configuration options.
 | `backgroundColor`                  | string      | Any CSS color, including `"transparent"` (default: `"rgb(30, 32, 48, 0.88)"`)                                              |
 | `enableJlpt`                       | boolean     | Enable JLPT level underline styling (`false` by default)                                                                   |
 | `preserveLineBreaks`               | boolean     | Preserve line breaks in visible overlay subtitle rendering (`false` by default). Enable to mirror mpv line layout.         |
-| `autoPauseVideoOnHover`            | boolean     | Pause playback while mouse hovers subtitle text, then resume on leave (`true` by default).                                  |
+| `autoPauseVideoOnHover`            | boolean     | Pause playback while mouse hovers subtitle text; resume after leaving subtitle area (`true` by default).                   |
+| `autoPauseVideoOnYomitanPopup`     | boolean     | Pause playback while Yomitan popup is open; resume when popup closes (`false` by default).                                 |
 | `hoverTokenColor`                  | string      | Hex color used for hovered subtitle token highlight in mpv (default: catppuccin mauve)                                     |
 | `hoverTokenBackgroundColor`        | string      | CSS color used for hovered subtitle token background highlight (default: semi-transparent dark)                            |
 | `frequencyDictionary.enabled`      | boolean     | Enable frequency highlighting from dictionary lookups (`false` by default)                                                 |
@@ -322,6 +323,7 @@ Set the initial vertical subtitle position (measured from the bottom of the scre
 | Option     | Values           | Description                                                            |
 | ---------- | ---------------- | ---------------------------------------------------------------------- |
 | `yPercent` | number (0 - 100) | Distance from the bottom as a percent of screen height (default: `10`) |
+
 In the overlay, you can fine-tune subtitle position at runtime with `Right-click + drag` on subtitle text.
 
 ### Secondary Subtitles
@@ -364,21 +366,23 @@ See `config.example.jsonc` for detailed configuration options and more examples.
 
 **Default keybindings:**
 
-| Key               | Command                      | Description                           |
+| Key                  | Command                      | Description                           |
-| ----------------- | ---------------------------- | ------------------------------------- |
+| -------------------- | ---------------------------- | ------------------------------------- |
-| `Space`           | `["cycle", "pause"]`         | Toggle pause                          |
+| `Space`              | `["cycle", "pause"]`         | Toggle pause                          |
-| `KeyJ`            | `["cycle", "sid"]`           | Cycle primary subtitle track          |
+| `KeyJ`               | `["cycle", "sid"]`           | Cycle primary subtitle track          |
-| `Shift+KeyJ`      | `["cycle", "secondary-sid"]` | Cycle secondary subtitle track        |
+| `Shift+KeyJ`         | `["cycle", "secondary-sid"]` | Cycle secondary subtitle track        |
-| `ArrowRight`      | `["seek", 5]`                | Seek forward 5 seconds                |
+| `ArrowRight`         | `["seek", 5]`                | Seek forward 5 seconds                |
-| `ArrowLeft`       | `["seek", -5]`               | Seek backward 5 seconds               |
+| `ArrowLeft`          | `["seek", -5]`               | Seek backward 5 seconds               |
-| `ArrowUp`         | `["seek", 60]`               | Seek forward 60 seconds               |
+| `ArrowUp`            | `["seek", 60]`               | Seek forward 60 seconds               |
-| `ArrowDown`       | `["seek", -60]`              | Seek backward 60 seconds              |
+| `ArrowDown`          | `["seek", -60]`              | Seek backward 60 seconds              |
-| `Shift+KeyH`      | `["sub-seek", -1]`           | Jump to previous subtitle             |
+| `Shift+KeyH`         | `["sub-seek", -1]`           | Jump to previous subtitle             |
-| `Shift+KeyL`      | `["sub-seek", 1]`            | Jump to next subtitle                 |
+| `Shift+KeyL`         | `["sub-seek", 1]`            | Jump to next subtitle                 |
-| `Ctrl+Shift+KeyH` | `["__replay-subtitle"]`      | Replay current subtitle, pause at end |
+| `Shift+BracketLeft`  | `["__sub-delay-prev-line"]`  | Shift subtitle delay to previous cue  |
-| `Ctrl+Shift+KeyL` | `["__play-next-subtitle"]`   | Play next subtitle, pause at end      |
+| `Shift+BracketRight` | `["__sub-delay-next-line"]`  | Shift subtitle delay to next cue      |
-| `KeyQ`            | `["quit"]`                   | Quit mpv                              |
+| `Ctrl+Shift+KeyH`    | `["__replay-subtitle"]`      | Replay current subtitle, pause at end |
-| `Ctrl+KeyW`       | `["quit"]`                   | Quit mpv                              |
+| `Ctrl+Shift+KeyL`    | `["__play-next-subtitle"]`   | Play next subtitle, pause at end      |
+| `KeyQ`               | `["quit"]`                   | Quit mpv                              |
+| `Ctrl+KeyW`          | `["quit"]`                   | Quit mpv                              |
 
 **Custom keybindings example:**
 
@@ -402,11 +406,11 @@ See `config.example.jsonc` for detailed configuration options and more examples.
 { "key": "Space", "command": null }
 ```
 
-**Special commands:** Commands prefixed with `__` are handled internally by the overlay rather than sent to mpv. `__replay-subtitle` replays the current subtitle and pauses at its end. `__play-next-subtitle` seeks to the next subtitle, plays it, and pauses at its end. `__runtime-options-open` opens the runtime options palette. `__runtime-option-cycle:<id>[:next|prev]` cycles a runtime option value.
+**Special commands:** Commands prefixed with `__` are handled internally by the overlay rather than sent to mpv. `__replay-subtitle` replays the current subtitle and pauses at its end. `__play-next-subtitle` seeks to the next subtitle, plays it, and pauses at its end. `__sub-delay-next-line` shifts subtitle delay so the active line aligns to the next cue start in the active subtitle source. `__sub-delay-prev-line` shifts subtitle delay so the active line aligns to the previous cue start. `__runtime-options-open` opens the runtime options palette. `__runtime-option-cycle:<id>[:next|prev]` cycles a runtime option value.
 
 **Supported commands:** Any valid mpv JSON IPC command array (`["cycle", "pause"]`, `["seek", 5]`, `["script-binding", "..."]`, etc.)
 
-For subtitle-position and subtitle-track proxy commands (`sub-pos`, `sid`, `secondary-sid`), SubMiner also shows an mpv OSD notification after the command runs.
+For subtitle-position and subtitle-track proxy commands (`sub-pos`, `sid`, `secondary-sid`) and subtitle delay commands (`sub-delay`), SubMiner also shows an mpv OSD notification after the command runs.
 
 **See `config.example.jsonc`** for more keybinding examples and configuration options.
 
@@ -768,17 +772,19 @@ Sync the active subtitle track using `alass` (preferred) or `ffsubsync`:
     "defaultMode": "auto",
     "alass_path": "",
     "ffsubsync_path": "",
-    "ffmpeg_path": ""
+    "ffmpeg_path": "",
+    "replace": true
   }
 }
 ```
 
-| Option           | Values               | Description                                                                                                 |
+| Option           | Values               | Description                                                                                                               |
-| ---------------- | -------------------- | ----------------------------------------------------------------------------------------------------------- |
+| ---------------- | -------------------- | ------------------------------------------------------------------------------------------------------------------------- |
-| `defaultMode`    | `"auto"`, `"manual"` | `auto`: try `alass` against secondary subtitle, then fallback to `ffsubsync`; `manual`: open overlay picker |
+| `defaultMode`    | `"auto"`, `"manual"` | `auto`: try `alass` against secondary subtitle, then fallback to `ffsubsync`; `manual`: open overlay picker               |
-| `alass_path`     | string path          | Path to `alass` executable. Empty or `null` falls back to `/usr/bin/alass`.                                 |
+| `alass_path`     | string path          | Path to `alass` executable. Empty or `null` falls back to `/usr/bin/alass`.                                               |
-| `ffsubsync_path` | string path          | Path to `ffsubsync` executable. Empty or `null` falls back to `/usr/bin/ffsubsync`.                         |
+| `ffsubsync_path` | string path          | Path to `ffsubsync` executable. Empty or `null` falls back to `/usr/bin/ffsubsync`.                                       |
-| `ffmpeg_path`    | string path          | Path to `ffmpeg` (used for internal subtitle extraction). Empty or `null` falls back to `/usr/bin/ffmpeg`.  |
+| `ffmpeg_path`    | string path          | Path to `ffmpeg` (used for internal subtitle extraction). Empty or `null` falls back to `/usr/bin/ffmpeg`.                |
+| `replace`        | `true`, `false`      | When `true` (default), overwrite the active subtitle file on successful sync. When `false`, write `<name>_retimed.<ext>`. |
 
 Default trigger is `Ctrl+Alt+S` via `shortcuts.triggerSubsync`.
 Customize it there, or set it to `null` to disable.

docs/launcher-script.md

@@ -79,18 +79,18 @@ Use `subminer <subcommand> -h` for command-specific help.
 
 ## Options
 
-| Flag                    | Description                                         |
+| Flag                  | Description                                         |
-| ----------------------- | --------------------------------------------------- |
+| --------------------- | --------------------------------------------------- |
-| `-d, --directory`       | Video search directory (default: cwd)               |
+| `-d, --directory`     | Video search directory (default: cwd)               |
-| `-r, --recursive`       | Search directories recursively                      |
+| `-r, --recursive`     | Search directories recursively                      |
-| `-R, --rofi`            | Use rofi instead of fzf                             |
+| `-R, --rofi`          | Use rofi instead of fzf                             |
-| `--start`               | Explicitly start overlay after mpv launches         |
+| `--start`             | Explicitly start overlay after mpv launches         |
-| `-S, --start-overlay`   | Explicitly start overlay after mpv launches         |
+| `-S, --start-overlay` | Explicitly start overlay after mpv launches         |
-| `-T, --no-texthooker`   | Disable texthooker server                           |
+| `-T, --no-texthooker` | Disable texthooker server                           |
-| `-p, --profile`         | mpv profile name (default: `subminer`)              |
+| `-p, --profile`       | mpv profile name (default: `subminer`)              |
-| `-b, --backend`         | Force window backend (`hyprland`, `sway`, `x11`)    |
+| `-b, --backend`       | Force window backend (`hyprland`, `sway`, `x11`)    |
-| `--log-level`           | Logger verbosity (`debug`, `info`, `warn`, `error`) |
+| `--log-level`         | Logger verbosity (`debug`, `info`, `warn`, `error`) |
-| `--dev`, `--debug`      | Enable app dev-mode (not tied to log level)         |
+| `--dev`, `--debug`    | Enable app dev-mode (not tied to log level)         |
 
 With default plugin settings (`auto_start=yes`, `auto_start_visible_overlay=yes`, `auto_start_pause_until_ready=yes`), explicit start flags are usually unnecessary.
 

docs/mining-workflow.md

@@ -34,6 +34,7 @@ The visible overlay renders subtitles as tokenized, clickable word spans. Each w
 
 - Word-level click targets for Yomitan lookup
 - Auto pause/resume on subtitle hover (enabled by default via `subtitleStyle.autoPauseVideoOnHover`)
+- Optional auto-pause while Yomitan popup is open (`subtitleStyle.autoPauseVideoOnYomitanPopup`)
 - Right-click to pause/resume
 - Right-click + drag to reposition subtitles
 - Modal dialogs for Jimaku search, field grouping, subsync, and runtime options

docs/mpv-plugin.md

@@ -120,27 +120,28 @@ aniskip_button_duration=3
 
 ### Option Reference
 
-| Option                       | Default                       | Values                                     | Description                                                            |
+| Option                         | Default                       | Values                                     | Description                                                                                |
-| ---------------------------- | ----------------------------- | ------------------------------------------ | ---------------------------------------------------------------------- |
+| ------------------------------ | ----------------------------- | ------------------------------------------ | ------------------------------------------------------------------------------------------ |
-| `binary_path`                | `""` (auto-detect)            | file path                                  | Path to SubMiner binary                                                |
+| `binary_path`                  | `""` (auto-detect)            | file path                                  | Path to SubMiner binary                                                                    |
-| `socket_path`                | `/tmp/subminer-socket`        | file path                                  | MPV IPC socket path                                                    |
+| `socket_path`                  | `/tmp/subminer-socket`        | file path                                  | MPV IPC socket path                                                                        |
-| `texthooker_enabled`         | `yes`                         | `yes` / `no`                               | Enable texthooker server                                               |
+| `texthooker_enabled`           | `yes`                         | `yes` / `no`                               | Enable texthooker server                                                                   |
-| `texthooker_port`            | `5174`                        | 1–65535                                    | Texthooker server port                                                 |
+| `texthooker_port`              | `5174`                        | 1–65535                                    | Texthooker server port                                                                     |
-| `backend`                    | `auto`                        | `auto`, `hyprland`, `sway`, `x11`, `macos` | Window manager backend                                                 |
+| `backend`                      | `auto`                        | `auto`, `hyprland`, `sway`, `x11`, `macos` | Window manager backend                                                                     |
-| `auto_start`                 | `yes`                         | `yes` / `no`                               | Auto-start overlay on file load when mpv socket matches `socket_path`  |
+| `auto_start`                   | `yes`                         | `yes` / `no`                               | Auto-start overlay on file load when mpv socket matches `socket_path`                      |
-| `auto_start_visible_overlay` | `yes`                         | `yes` / `no`                               | Show visible layer on auto-start when mpv socket matches `socket_path` |
+| `auto_start_visible_overlay`   | `yes`                         | `yes` / `no`                               | Show visible layer on auto-start when mpv socket matches `socket_path`                     |
-| `auto_start_pause_until_ready` | `yes`                       | `yes` / `no`                               | Pause mpv on visible auto-start; resume when SubMiner signals tokenization-ready |
+| `auto_start_pause_until_ready` | `yes`                         | `yes` / `no`                               | Pause mpv on visible auto-start; resume when SubMiner signals tokenization-ready           |
-| `osd_messages`               | `yes`                         | `yes` / `no`                               | Show OSD status messages                                               |
+| `osd_messages`                 | `yes`                         | `yes` / `no`                               | Show OSD status messages                                                                   |
-| `log_level`                  | `info`                        | `debug`, `info`, `warn`, `error`           | Log verbosity                                                          |
+| `log_level`                    | `info`                        | `debug`, `info`, `warn`, `error`           | Log verbosity                                                                              |
-| `aniskip_enabled`            | `yes`                         | `yes` / `no`                               | Enable AniSkip intro detection                                         |
+| `aniskip_enabled`              | `yes`                         | `yes` / `no`                               | Enable AniSkip intro detection                                                             |
-| `aniskip_title`              | `""`                          | string                                     | Override title used for lookup                                         |
+| `aniskip_title`                | `""`                          | string                                     | Override title used for lookup                                                             |
-| `aniskip_season`             | `""`                          | numeric season                             | Optional season hint                                                   |
+| `aniskip_season`               | `""`                          | numeric season                             | Optional season hint                                                                       |
-| `aniskip_mal_id`             | `""`                          | numeric MAL id                             | Skip title lookup; use fixed id                                        |
+| `aniskip_mal_id`               | `""`                          | numeric MAL id                             | Skip title lookup; use fixed id                                                            |
-| `aniskip_episode`            | `""`                          | numeric episode                            | Skip episode parsing; use fixed                                        |
+| `aniskip_episode`              | `""`                          | numeric episode                            | Skip episode parsing; use fixed                                                            |
-| `aniskip_show_button`        | `yes`                         | `yes` / `no`                               | Show in-range intro skip prompt                                        |
+| `aniskip_payload`              | `""`                          | JSON / base64-encoded JSON                 | Optional pre-fetched AniSkip payload for this media. When set, plugin skips network lookup |
-| `aniskip_button_text`        | `You can skip by pressing %s` | string                                     | OSD prompt format (`%s`=key)                                           |
+| `aniskip_show_button`          | `yes`                         | `yes` / `no`                               | Show in-range intro skip prompt                                                            |
-| `aniskip_button_key`         | `y-k`                         | mpv key chord                              | Primary key for intro skip action (`y-k` always works as fallback)     |
+| `aniskip_button_text`          | `You can skip by pressing %s` | string                                     | OSD prompt format (`%s`=key)                                                               |
-| `aniskip_button_duration`    | `3`                           | float seconds                              | OSD hint duration                                                      |
+| `aniskip_button_key`           | `y-k`                         | mpv key chord                              | Primary key for intro skip action (`y-k` always works as fallback)                         |
+| `aniskip_button_duration`      | `3`                           | float seconds                              | OSD hint duration                                                                          |
 
 ## Binary Auto-Detection
 
@@ -208,7 +209,8 @@ script-message subminer-start backend=hyprland socket=/custom/path texthooker=no
   - You explicitly call `script-message subminer-aniskip-refresh`.
 - Lookups are asynchronous (no blocking `ps`/`curl` on `file-loaded`).
 - MAL/title resolution is cached for the current mpv session.
-- When launched via `subminer`, launcher runs `guessit` first (file targets) and passes title/season/episode to the plugin; fallback is filename-derived title.
+- When launched via `subminer`, launcher can pass `aniskip_payload` (pre-fetched AniSkip `skip-times` payload) and the plugin applies it directly without making API calls.
+- If the payload is absent or invalid, lookup falls back to title/MAL-based async fetch.
 - Install `guessit` for best detection quality (`python3 -m pip install --user guessit`).
 - If OP interval exists, plugin adds `AniSkip Intro Start` and `AniSkip Intro End` chapters.
 - At intro start, plugin shows an OSD hint for the first 3 seconds (`You can skip by pressing y-k` by default).

docs/plausible.test.ts

@@ -0,0 +1,15 @@
+import { expect, test } from 'bun:test';
+import { readFileSync } from 'node:fs';
+
+const docsThemePath = new URL('./.vitepress/theme/index.ts', import.meta.url);
+const docsThemeContents = readFileSync(docsThemePath, 'utf8');
+
+test('docs theme has no plausible analytics wiring', () => {
+  expect(docsThemeContents).not.toContain('@plausible-analytics/tracker');
+  expect(docsThemeContents).not.toContain('initPlausibleTracker');
+  expect(docsThemeContents).not.toContain('worker.subminer.moe');
+  expect(docsThemeContents).not.toContain('domain:');
+  expect(docsThemeContents).not.toContain('outboundLinks: true');
+  expect(docsThemeContents).not.toContain('fileDownloads: true');
+  expect(docsThemeContents).not.toContain('formSubmissions: true');
+});

docs/public/config.example.jsonc

@@ -88,6 +88,7 @@
     "alass_path": "", // Alass path setting.
     "ffsubsync_path": "", // Ffsubsync path setting.
     "ffmpeg_path": "", // Ffmpeg path setting.
+    "replace": true, // Replace active subtitle file when synchronization succeeds.
   }, // Subsync engine and executable paths.
 
   // ==========================================
@@ -106,7 +107,8 @@
   "subtitleStyle": {
     "enableJlpt": false, // Enable JLPT vocabulary level underlines. When disabled, JLPT tagging lookup and underlines are skipped. Values: true | false
     "preserveLineBreaks": false, // Preserve line breaks in visible overlay subtitle rendering. When false, line breaks are flattened to spaces for a single-line flow. Values: true | false
-    "autoPauseVideoOnHover": true, // Automatically pause mpv playback while hovering subtitle text, then resume on leave. Values: true | false
+    "autoPauseVideoOnHover": true, // Automatically pause mpv playback while hovering subtitle text; resume after leaving subtitle area. Values: true | false
+    "autoPauseVideoOnYomitanPopup": false, // Automatically pause mpv playback while Yomitan popup is open; resume when popup closes. Values: true | false
     "hoverTokenColor": "#f4dbd6", // Hex color used for hovered subtitle token highlight in mpv.
     "hoverTokenBackgroundColor": "rgba(54, 58, 79, 0.84)", // CSS color used for hovered subtitle token background highlight in mpv.
     "fontFamily": "M PLUS 1 Medium, Source Han Sans JP, Noto Sans CJK JP", // Font family setting.

docs/shortcuts.md

@@ -46,6 +46,8 @@ These control playback and subtitle display. They require overlay window focus.
 | `ArrowDown`          | Seek backward 60 seconds                           |
 | `Shift+H`            | Jump to previous subtitle                          |
 | `Shift+L`            | Jump to next subtitle                              |
+| `Shift+[`            | Shift subtitle delay to previous subtitle cue      |
+| `Shift+]`            | Shift subtitle delay to next subtitle cue          |
 | `Ctrl+Shift+H`       | Replay current subtitle (play to end, then pause)  |
 | `Ctrl+Shift+L`       | Play next subtitle (jump, play to end, then pause) |
 | `Q`                  | Quit mpv                                           |
@@ -56,7 +58,32 @@ These control playback and subtitle display. They require overlay window focus.
 
 These keybindings can be overridden or disabled via the `keybindings` config array.
 
-Mouse-hover playback behavior is configured separately from shortcuts: `subtitleStyle.autoPauseVideoOnHover` defaults to `true` (pause on subtitle hover, resume on leave).
+Mouse-hover playback behavior is configured separately from shortcuts: `subtitleStyle.autoPauseVideoOnHover` defaults to `true` (pause on subtitle hover; resume after leaving subtitle area). Optional popup behavior: set `subtitleStyle.autoPauseVideoOnYomitanPopup` to `true` to keep playback paused while Yomitan popup is open.
+
+When a Yomitan popup is open, SubMiner also provides popup control shortcuts:
+
+| Shortcut    | Action                                          |
+| ----------- | ----------------------------------------------- |
+| `J`         | Scroll definitions down                         |
+| `K`         | Scroll definitions up                           |
+| `ArrowDown` | Scroll definitions down                         |
+| `ArrowUp`   | Scroll definitions up                           |
+| `M`         | Mine/add selected term                          |
+| `P`         | Play selected term audio                        |
+| `[`         | Play previous available audio (selected source) |
+| `]`         | Play next available audio (selected source)     |
+
+## Keyboard-Driven Lookup Mode
+
+These shortcuts are fixed (not configurable) and require overlay focus.
+
+| Shortcut                       | Action                                                                                       |
+| ------------------------------ | -------------------------------------------------------------------------------------------- |
+| `Ctrl/Cmd+Shift+Y`             | Toggle keyboard-driven token selection mode on/off                                           |
+| `Ctrl/Cmd+Y`                   | Toggle lookup popup for selected token (open when closed, close when open)                   |
+| `ArrowLeft/Right`, `H`, or `L` | Move selected token (previous/next); if lookup is open, refresh definition for the new token |
+
+Keyboard-driven mode draws a selection outline around the active token. Use `Ctrl/Cmd+Y` to open or close lookup for that token. While the popup is open, popup-local controls still work from the overlay (`J/K`, `ArrowUp/ArrowDown`, `M`, `P`, `[`, `]`) and focus is forced back to the overlay so token navigation can continue without clicking subtitle text again. Moving left/right past the start or end of the line jumps to the previous or next subtitle line and keeps playback paused if it was already paused.
 
 ## Subtitle & Feature Shortcuts
 

docs/usage.md

@@ -209,7 +209,13 @@ Notes:
 
 These keybindings only work when the overlay window has focus. See [Configuration](/configuration) for customization.
 
-By default, hovering over subtitle text pauses mpv playback and leaving the subtitle area resumes playback. Set `subtitleStyle.autoPauseVideoOnHover` to `false` to disable this behavior.
+By default, hovering over subtitle text pauses mpv playback. Playback resumes as soon as the cursor leaves subtitle text. Set `subtitleStyle.autoPauseVideoOnHover` to `false` to disable this behavior.
+
+If you want playback to stay paused while a Yomitan popup is open, set `subtitleStyle.autoPauseVideoOnYomitanPopup` to `true`. When enabled, SubMiner auto-resumes on popup close only if SubMiner paused playback for that popup.
+
+Keyboard-driven lookup mode is available with fixed shortcuts: `Ctrl/Cmd+Shift+Y` toggles token-selection mode, `ArrowLeft/Right` (or `H/L`) moves the selected token, and `Ctrl/Cmd+Y` opens or closes lookup for that token.
+
+If the Yomitan popup is open, you can control it directly from the overlay without moving focus into the popup: `J/K` or `ArrowUp/ArrowDown` scroll definitions, `M` mines/adds the selected term, `P` plays term audio, `[` plays the previous available audio, and `]` plays the next available audio in the selected source. While lookup stays open, `ArrowLeft/Right` (or `H/L`) moves to the previous or next token and refreshes the definition for the new token. If you move past the start or end of the current subtitle line, SubMiner jumps to the previous or next subtitle line, moves the selector to the edge token on that line, and keeps playback paused if it was already paused.
 
 ### Drag-and-drop Queueing
 

launcher/aniskip-metadata.test.ts

@@ -4,8 +4,38 @@ import {
   inferAniSkipMetadataForFile,
   buildSubminerScriptOpts,
   parseAniSkipGuessitJson,
+  resolveAniSkipMetadataForFile,
 } from './aniskip-metadata';
 
+function makeMockResponse(payload: unknown): Response {
+  return {
+    ok: true,
+    status: 200,
+    json: async () => payload,
+  } as Response;
+}
+
+function normalizeFetchInput(input: string | URL | Request): string {
+  if (typeof input === 'string') return input;
+  if (input instanceof URL) return input.toString();
+  return input.url;
+}
+
+async function withMockFetch(
+  handler: (input: string | URL | Request) => Promise<Response>,
+  fn: () => Promise<void>,
+): Promise<void> {
+  const original = globalThis.fetch;
+  (globalThis as { fetch: typeof fetch }).fetch = (async (input: string | URL | Request) => {
+    return handler(input);
+  }) as typeof fetch;
+  try {
+    await fn();
+  } finally {
+    (globalThis as { fetch: typeof fetch }).fetch = original;
+  }
+}
+
 test('parseAniSkipGuessitJson extracts title season and episode', () => {
   const parsed = parseAniSkipGuessitJson(
     JSON.stringify({ title: 'My Show', season: 2, episode: 7 }),
@@ -16,6 +46,10 @@ test('parseAniSkipGuessitJson extracts title season and episode', () => {
     season: 2,
     episode: 7,
     source: 'guessit',
+    malId: null,
+    introStart: null,
+    introEnd: null,
+    lookupStatus: 'lookup_failed',
   });
 });
 
@@ -34,6 +68,10 @@ test('parseAniSkipGuessitJson prefers series over episode title', () => {
     season: 1,
     episode: 10,
     source: 'guessit',
+    malId: null,
+    introStart: null,
+    introEnd: null,
+    lookupStatus: 'lookup_failed',
   });
 });
 
@@ -60,16 +98,80 @@ test('inferAniSkipMetadataForFile falls back to anime directory title when filen
   assert.equal(parsed.source, 'fallback');
 });
 
-test('buildSubminerScriptOpts includes aniskip metadata fields', () => {
+test('resolveAniSkipMetadataForFile resolves MAL id and intro payload', async () => {
+  await withMockFetch(
+    async (input) => {
+      const url = normalizeFetchInput(input);
+      if (url.includes('myanimelist.net/search/prefix.json')) {
+        return makeMockResponse({
+          categories: [
+            {
+              items: [
+                { id: '9876', name: 'Wrong Match' },
+                { id: '1234', name: 'My Show' },
+              ],
+            },
+          ],
+        });
+      }
+      if (url.includes('api.aniskip.com/v1/skip-times/1234/7')) {
+        return makeMockResponse({
+          found: true,
+          results: [{ skip_type: 'op', interval: { start_time: 12.5, end_time: 54.2 } }],
+        });
+      }
+      throw new Error(`unexpected url: ${url}`);
+    },
+    async () => {
+      const resolved = await resolveAniSkipMetadataForFile('/media/Anime.My.Show.S01E07.mkv');
+      assert.equal(resolved.malId, 1234);
+      assert.equal(resolved.introStart, 12.5);
+      assert.equal(resolved.introEnd, 54.2);
+      assert.equal(resolved.lookupStatus, 'ready');
+      assert.equal(resolved.title, 'Anime My Show');
+    },
+  );
+});
+
+test('resolveAniSkipMetadataForFile emits missing_mal_id when MAL search misses', async () => {
+  await withMockFetch(
+    async () => makeMockResponse({ categories: [] }),
+    async () => {
+      const resolved = await resolveAniSkipMetadataForFile('/media/NopeShow.S01E03.mkv');
+      assert.equal(resolved.malId, null);
+      assert.equal(resolved.lookupStatus, 'missing_mal_id');
+    },
+  );
+});
+
+test('buildSubminerScriptOpts includes aniskip payload fields', () => {
   const opts = buildSubminerScriptOpts('/tmp/SubMiner.AppImage', '/tmp/subminer.sock', {
     title: "Frieren: Beyond Journey's End",
     season: 1,
     episode: 5,
     source: 'guessit',
+    malId: 1234,
+    introStart: 30.5,
+    introEnd: 62,
+    lookupStatus: 'ready',
   });
+  const payloadMatch = opts.match(/subminer-aniskip_payload=([^,]+)/);
   assert.match(opts, /subminer-binary_path=\/tmp\/SubMiner\.AppImage/);
   assert.match(opts, /subminer-socket_path=\/tmp\/subminer\.sock/);
   assert.match(opts, /subminer-aniskip_title=Frieren: Beyond Journey's End/);
   assert.match(opts, /subminer-aniskip_season=1/);
   assert.match(opts, /subminer-aniskip_episode=5/);
+  assert.match(opts, /subminer-aniskip_mal_id=1234/);
+  assert.match(opts, /subminer-aniskip_intro_start=30.5/);
+  assert.match(opts, /subminer-aniskip_intro_end=62/);
+  assert.match(opts, /subminer-aniskip_lookup_status=ready/);
+  assert.ok(payloadMatch !== null);
+  assert.equal(payloadMatch[1].includes('%'), false);
+  const payloadJson = Buffer.from(payloadMatch[1], 'base64url').toString('utf-8');
+  const payload = JSON.parse(payloadJson);
+  assert.equal(payload.found, true);
+  const first = payload.results?.[0];
+  assert.equal(first.skip_type, 'op');
+  assert.equal(first.interval.start_time, 30.5);
+  assert.equal(first.interval.end_time, 62);
 });

launcher/aniskip-metadata.ts

@@ -2,11 +2,22 @@ import path from 'node:path';
 import { spawnSync } from 'node:child_process';
 import { commandExists } from './util.js';
 
+export type AniSkipLookupStatus =
+  | 'ready'
+  | 'missing_mal_id'
+  | 'missing_episode'
+  | 'missing_payload'
+  | 'lookup_failed';
+
 export interface AniSkipMetadata {
   title: string;
   season: number | null;
   episode: number | null;
   source: 'guessit' | 'fallback';
+  malId: number | null;
+  introStart: number | null;
+  introEnd: number | null;
+  lookupStatus?: AniSkipLookupStatus;
 }
 
 interface InferAniSkipDeps {
@@ -14,6 +25,50 @@ interface InferAniSkipDeps {
   runGuessit: (mediaPath: string) => string | null;
 }
 
+interface MalSearchResult {
+  id?: unknown;
+  name?: unknown;
+}
+
+interface MalSearchCategory {
+  items?: unknown;
+}
+
+interface MalSearchResponse {
+  categories?: unknown;
+}
+
+interface AniSkipIntervalPayload {
+  start_time?: unknown;
+  end_time?: unknown;
+}
+
+interface AniSkipSkipItemPayload {
+  skip_type?: unknown;
+  interval?: unknown;
+}
+
+interface AniSkipPayloadResponse {
+  found?: unknown;
+  results?: unknown;
+}
+
+const MAL_PREFIX_API = 'https://myanimelist.net/search/prefix.json?type=anime&keyword=';
+const ANISKIP_PAYLOAD_API = 'https://api.aniskip.com/v1/skip-times/';
+const MAL_USER_AGENT = 'SubMiner-launcher/ani-skip';
+const MAL_MATCH_STOPWORDS = new Set([
+  'the',
+  'this',
+  'that',
+  'world',
+  'animated',
+  'series',
+  'season',
+  'no',
+  'on',
+  'and',
+]);
+
 function toPositiveInt(value: unknown): number | null {
   if (typeof value === 'number' && Number.isFinite(value) && value > 0) {
     return Math.floor(value);
@@ -27,6 +82,227 @@ function toPositiveInt(value: unknown): number | null {
   return null;
 }
 
+function toPositiveNumber(value: unknown): number | null {
+  if (typeof value === 'number' && Number.isFinite(value) && value > 0) {
+    return value;
+  }
+  if (typeof value === 'string') {
+    const parsed = Number.parseFloat(value);
+    if (Number.isFinite(parsed) && parsed > 0) {
+      return parsed;
+    }
+  }
+  return null;
+}
+
+function normalizeForMatch(value: string): string {
+  return value
+    .toLowerCase()
+    .replace(/[^\w]+/g, ' ')
+    .replace(/\s+/g, ' ')
+    .trim();
+}
+
+function tokenizeMatchWords(value: string): string[] {
+  const words = normalizeForMatch(value)
+    .split(' ')
+    .filter((word) => word.length >= 3);
+  return words.filter((word) => !MAL_MATCH_STOPWORDS.has(word));
+}
+
+function titleOverlapScore(expectedTitle: string, candidateTitle: string): number {
+  const expected = normalizeForMatch(expectedTitle);
+  const candidate = normalizeForMatch(candidateTitle);
+
+  if (!expected || !candidate) return 0;
+
+  if (candidate.includes(expected)) return 120;
+
+  const expectedTokens = tokenizeMatchWords(expectedTitle);
+  if (expectedTokens.length === 0) return 0;
+
+  const candidateSet = new Set(tokenizeMatchWords(candidateTitle));
+  let score = 0;
+  let matched = 0;
+
+  for (const token of expectedTokens) {
+    if (candidateSet.has(token)) {
+      score += 30;
+      matched += 1;
+    } else {
+      score -= 20;
+    }
+  }
+
+  if (matched === 0) {
+    score -= 80;
+  }
+
+  const coverage = matched / expectedTokens.length;
+  if (expectedTokens.length >= 2) {
+    if (coverage >= 0.8) score += 30;
+    else if (coverage >= 0.6) score += 10;
+    else score -= 50;
+  } else if (coverage >= 1) {
+    score += 10;
+  }
+
+  return score;
+}
+
+function hasAnySequelMarker(candidateTitle: string): boolean {
+  const normalized = ` ${normalizeForMatch(candidateTitle)} `;
+  if (!normalized.trim()) return false;
+
+  const markers = [
+    'season 2',
+    'season 3',
+    'season 4',
+    '2nd season',
+    '3rd season',
+    '4th season',
+    'second season',
+    'third season',
+    'fourth season',
+    ' ii ',
+    ' iii ',
+    ' iv ',
+  ];
+  return markers.some((marker) => normalized.includes(marker));
+}
+
+function seasonSignalScore(requestedSeason: number | null, candidateTitle: string): number {
+  const season = toPositiveInt(requestedSeason);
+  if (!season || season < 1) return 0;
+
+  const normalized = ` ${normalizeForMatch(candidateTitle)} `;
+  if (!normalized.trim()) return 0;
+
+  if (season === 1) {
+    return hasAnySequelMarker(candidateTitle) ? -60 : 20;
+  }
+
+  const numericMarker = ` season ${season} `;
+  const ordinalMarker = ` ${season}th season `;
+  if (normalized.includes(numericMarker) || normalized.includes(ordinalMarker)) {
+    return 40;
+  }
+
+  const romanAliases = {
+    2: [' ii ', ' second season ', ' 2nd season '],
+    3: [' iii ', ' third season ', ' 3rd season '],
+    4: [' iv ', ' fourth season ', ' 4th season '],
+    5: [' v ', ' fifth season ', ' 5th season '],
+  } as const;
+
+  const aliases = romanAliases[season] ?? [];
+  return aliases.some((alias) => normalized.includes(alias))
+    ? 40
+    : hasAnySequelMarker(candidateTitle)
+      ? -20
+      : 5;
+}
+
+function toMalSearchItems(payload: unknown): MalSearchResult[] {
+  const parsed = payload as MalSearchResponse;
+  const categories = Array.isArray(parsed?.categories) ? parsed.categories : null;
+  if (!categories) return [];
+
+  const items: MalSearchResult[] = [];
+  for (const category of categories) {
+    const typedCategory = category as MalSearchCategory;
+    const rawItems = Array.isArray(typedCategory?.items) ? typedCategory.items : [];
+    for (const rawItem of rawItems) {
+      const item = rawItem as Record<string, unknown>;
+      items.push({
+        id: item?.id,
+        name: item?.name,
+      });
+    }
+  }
+  return items;
+}
+
+function normalizeEpisodePayload(value: unknown): number | null {
+  return toPositiveNumber(value);
+}
+
+function parseAniSkipPayload(payload: unknown): { start: number; end: number } | null {
+  const parsed = payload as AniSkipPayloadResponse;
+  const results = Array.isArray(parsed?.results) ? parsed.results : null;
+  if (!results) return null;
+
+  for (const rawResult of results) {
+    const result = rawResult as AniSkipSkipItemPayload;
+    if (
+      result.skip_type !== 'op' ||
+      typeof result.interval !== 'object' ||
+      result.interval === null
+    ) {
+      continue;
+    }
+    const interval = result.interval as AniSkipIntervalPayload;
+    const start = normalizeEpisodePayload(interval?.start_time);
+    const end = normalizeEpisodePayload(interval?.end_time);
+    if (start !== null && end !== null && end > start) {
+      return { start, end };
+    }
+  }
+
+  return null;
+}
+
+async function fetchJson<T>(url: string): Promise<T | null> {
+  const response = await fetch(url, {
+    headers: {
+      'User-Agent': MAL_USER_AGENT,
+    },
+  });
+  if (!response.ok) return null;
+  try {
+    return (await response.json()) as T;
+  } catch {
+    return null;
+  }
+}
+
+async function resolveMalIdFromTitle(title: string, season: number | null): Promise<number | null> {
+  const lookup = season && season > 1 ? `${title} Season ${season}` : title;
+  const payload = await fetchJson<unknown>(`${MAL_PREFIX_API}${encodeURIComponent(lookup)}`);
+  const items = toMalSearchItems(payload);
+  if (!items.length) return null;
+
+  let bestScore = Number.NEGATIVE_INFINITY;
+  let bestMalId: number | null = null;
+
+  for (const item of items) {
+    const id = toPositiveInt(item.id);
+    if (!id) continue;
+    const name = typeof item.name === 'string' ? item.name : '';
+    if (!name) continue;
+
+    const score = titleOverlapScore(title, name) + seasonSignalScore(season, name);
+    if (score > bestScore) {
+      bestScore = score;
+      bestMalId = id;
+    }
+  }
+
+  return bestMalId;
+}
+
+async function fetchAniSkipPayload(
+  malId: number,
+  episode: number,
+): Promise<{ start: number; end: number } | null> {
+  const payload = await fetchJson<unknown>(
+    `${ANISKIP_PAYLOAD_API}${malId}/${episode}?types=op&types=ed`,
+  );
+  const parsed = payload as AniSkipPayloadResponse;
+  if (!parsed || parsed.found !== true) return null;
+  return parseAniSkipPayload(parsed);
+}
+
 function detectEpisodeFromName(baseName: string): number | null {
   const patterns = [
     /[Ss]\d+[Ee](\d{1,3})/,
@@ -133,6 +409,10 @@ export function parseAniSkipGuessitJson(stdout: string, mediaPath: string): AniS
       season,
       episode: episodeFromDirect ?? episodeFromList,
       source: 'guessit',
+      malId: null,
+      introStart: null,
+      introEnd: null,
+      lookupStatus: 'lookup_failed',
     };
   } catch {
     return null;
@@ -171,9 +451,70 @@ export function inferAniSkipMetadataForFile(
     season: detectSeasonFromNameOrDir(mediaPath),
     episode: detectEpisodeFromName(baseName),
     source: 'fallback',
+    malId: null,
+    introStart: null,
+    introEnd: null,
+    lookupStatus: 'lookup_failed',
   };
 }
 
+export async function resolveAniSkipMetadataForFile(mediaPath: string): Promise<AniSkipMetadata> {
+  const inferred = inferAniSkipMetadataForFile(mediaPath);
+  if (!inferred.title) {
+    return { ...inferred, lookupStatus: 'lookup_failed' };
+  }
+
+  try {
+    const malId = await resolveMalIdFromTitle(inferred.title, inferred.season);
+    if (!malId) {
+      return {
+        ...inferred,
+        malId: null,
+        introStart: null,
+        introEnd: null,
+        lookupStatus: 'missing_mal_id',
+      };
+    }
+
+    if (!inferred.episode) {
+      return {
+        ...inferred,
+        malId,
+        introStart: null,
+        introEnd: null,
+        lookupStatus: 'missing_episode',
+      };
+    }
+
+    const payload = await fetchAniSkipPayload(malId, inferred.episode);
+    if (!payload) {
+      return {
+        ...inferred,
+        malId,
+        introStart: null,
+        introEnd: null,
+        lookupStatus: 'missing_payload',
+      };
+    }
+
+    return {
+      ...inferred,
+      malId,
+      introStart: payload.start,
+      introEnd: payload.end,
+      lookupStatus: 'ready',
+    };
+  } catch {
+    return {
+      ...inferred,
+      malId: inferred.malId,
+      introStart: inferred.introStart,
+      introEnd: inferred.introEnd,
+      lookupStatus: 'lookup_failed',
+    };
+  }
+}
+
 function sanitizeScriptOptValue(value: string): string {
   return value
     .replace(/,/g, ' ')
@@ -182,6 +523,30 @@ function sanitizeScriptOptValue(value: string): string {
     .trim();
 }
 
+function buildLauncherAniSkipPayload(aniSkipMetadata: AniSkipMetadata): string | null {
+  if (!aniSkipMetadata.malId || !aniSkipMetadata.introStart || !aniSkipMetadata.introEnd) {
+    return null;
+  }
+  if (aniSkipMetadata.introEnd <= aniSkipMetadata.introStart) {
+    return null;
+  }
+  const payload = {
+    found: true,
+    results: [
+      {
+        skip_type: 'op',
+        interval: {
+          start_time: aniSkipMetadata.introStart,
+          end_time: aniSkipMetadata.introEnd,
+        },
+      },
+    ],
+  };
+  // mpv --script-opts treats `%` as an escape prefix, so URL-encoding can break parsing.
+  // Base64url stays script-opts-safe and is decoded by the plugin launcher payload parser.
+  return Buffer.from(JSON.stringify(payload), 'utf-8').toString('base64url');
+}
+
 export function buildSubminerScriptOpts(
   appPath: string,
   socketPath: string,
@@ -200,5 +565,23 @@ export function buildSubminerScriptOpts(
   if (aniSkipMetadata && aniSkipMetadata.episode && aniSkipMetadata.episode > 0) {
     parts.push(`subminer-aniskip_episode=${aniSkipMetadata.episode}`);
   }
+  if (aniSkipMetadata && aniSkipMetadata.malId && aniSkipMetadata.malId > 0) {
+    parts.push(`subminer-aniskip_mal_id=${aniSkipMetadata.malId}`);
+  }
+  if (aniSkipMetadata && aniSkipMetadata.introStart !== null && aniSkipMetadata.introStart > 0) {
+    parts.push(`subminer-aniskip_intro_start=${aniSkipMetadata.introStart}`);
+  }
+  if (aniSkipMetadata && aniSkipMetadata.introEnd !== null && aniSkipMetadata.introEnd > 0) {
+    parts.push(`subminer-aniskip_intro_end=${aniSkipMetadata.introEnd}`);
+  }
+  if (aniSkipMetadata?.lookupStatus) {
+    parts.push(
+      `subminer-aniskip_lookup_status=${sanitizeScriptOptValue(aniSkipMetadata.lookupStatus)}`,
+    );
+  }
+  const aniskipPayload = aniSkipMetadata ? buildLauncherAniSkipPayload(aniSkipMetadata) : null;
+  if (aniskipPayload) {
+    parts.push(`subminer-aniskip_payload=${sanitizeScriptOptValue(aniskipPayload)}`);
+  }
   return parts.join(',');
 }

launcher/commands/playback-command.ts

@@ -143,14 +143,10 @@ export async function runPlaybackCommand(context: LauncherCommandContext): Promi
     pluginRuntimeConfig.autoStartPauseUntilReady;
 
   if (shouldPauseUntilOverlayReady) {
-    log(
+    log('info', args.logLevel, 'Configured to pause mpv until overlay and tokenization are ready');
-      'info',
-      args.logLevel,
-      'Configured to pause mpv until overlay and tokenization are ready',
-    );
   }
 
-  startMpv(
+  await startMpv(
     selectedTarget.target,
     selectedTarget.kind,
     args,
@@ -198,11 +194,7 @@ export async function runPlaybackCommand(context: LauncherCommandContext): Promi
     if (ready) {
       log('info', args.logLevel, 'MPV IPC socket ready, relying on mpv plugin auto-start');
     } else {
-      log(
+      log('info', args.logLevel, 'MPV IPC socket not ready yet, relying on mpv plugin auto-start');
-        'info',
-        args.logLevel,
-        'MPV IPC socket not ready yet, relying on mpv plugin auto-start',
-      );
     }
   } else if (ready) {
     log(

launcher/config/plugin-runtime-config.ts

@@ -52,7 +52,10 @@ export function parsePluginRuntimeConfigContent(
       continue;
     }
     if (key === 'auto_start_visible_overlay') {
-      runtimeConfig.autoStartVisibleOverlay = parseBooleanValue('auto_start_visible_overlay', value);
+      runtimeConfig.autoStartVisibleOverlay = parseBooleanValue(
+        'auto_start_visible_overlay',
+        value,
+      );
       continue;
     }
     if (key === 'auto_start_pause_until_ready') {

launcher/jellyfin.ts

@@ -239,8 +239,7 @@ export function parseJellyfinPreviewAuthResponse(raw: string): JellyfinPreviewAu
   const serverUrl = sanitizeServerUrl(
     typeof candidate.serverUrl === 'string' ? candidate.serverUrl : '',
   );
-  const accessToken =
+  const accessToken = typeof candidate.accessToken === 'string' ? candidate.accessToken.trim() : '';
-    typeof candidate.accessToken === 'string' ? candidate.accessToken.trim() : '';
   const userId = typeof candidate.userId === 'string' ? candidate.userId.trim() : '';
   if (!serverUrl || !accessToken) return null;
 
@@ -271,9 +270,7 @@ export function readUtf8FileAppendedSince(logPath: string, offsetBytes: number):
     const buffer = fs.readFileSync(logPath);
     if (buffer.length === 0) return '';
     const normalizedOffset =
-      Number.isFinite(offsetBytes) && offsetBytes >= 0
+      Number.isFinite(offsetBytes) && offsetBytes >= 0 ? Math.floor(offsetBytes) : 0;
-        ? Math.floor(offsetBytes)
-        : 0;
     const startOffset = normalizedOffset > buffer.length ? 0 : normalizedOffset;
     return buffer.subarray(startOffset).toString('utf8');
   } catch {
@@ -399,7 +396,9 @@ async function runAppJellyfinCommand(
 
   const hasCommandSignal = (output: string): boolean => {
     if (label === 'jellyfin-libraries') {
-      return output.includes('Jellyfin library:') || output.includes('No Jellyfin libraries found.');
+      return (
+        output.includes('Jellyfin library:') || output.includes('No Jellyfin libraries found.')
+      );
     }
     if (label === 'jellyfin-items') {
       return (
@@ -550,7 +549,9 @@ async function resolveJellyfinSelectionViaApp(
   }
 
   const configuredDefaultLibraryId = session.defaultLibraryId;
-  const hasConfiguredDefault = libraries.some((library) => library.id === configuredDefaultLibraryId);
+  const hasConfiguredDefault = libraries.some(
+    (library) => library.id === configuredDefaultLibraryId,
+  );
   let libraryId = hasConfiguredDefault ? configuredDefaultLibraryId : '';
   if (!libraryId) {
     libraryId = pickLibrary(

launcher/main.test.ts

@@ -333,7 +333,10 @@ test('parseJellyfinErrorFromAppOutput extracts main runtime error lines', () =>
 [subminer] - 2026-03-01 13:10:34 - ERROR - [main] runJellyfinCommand failed: {"message":"Missing Jellyfin password."}
 `);
 
-  assert.equal(parsed, '[main] runJellyfinCommand failed: {"message":"Missing Jellyfin password."}');
+  assert.equal(
+    parsed,
+    '[main] runJellyfinCommand failed: {"message":"Missing Jellyfin password."}',
+  );
 });
 
 test('parseJellyfinPreviewAuthResponse parses valid structured response payload', () => {
@@ -385,7 +388,9 @@ test('shouldRetryWithStartForNoRunningInstance matches expected app lifecycle er
     true,
   );
   assert.equal(
-    shouldRetryWithStartForNoRunningInstance('Missing Jellyfin session. Run --jellyfin-login first.'),
+    shouldRetryWithStartForNoRunningInstance(
+      'Missing Jellyfin session. Run --jellyfin-login first.',
+    ),
     false,
   );
 });
@@ -407,10 +412,13 @@ test('readUtf8FileAppendedSince treats offset as bytes and survives multibyte lo
 });
 
 test('parseEpisodePathFromDisplay extracts series and season from episode display titles', () => {
-  assert.deepEqual(parseEpisodePathFromDisplay('KONOSUBA S01E03 A Panty Treasure in This Right Hand!'), {
+  assert.deepEqual(
-    seriesName: 'KONOSUBA',
+    parseEpisodePathFromDisplay('KONOSUBA S01E03 A Panty Treasure in This Right Hand!'),
-    seasonNumber: 1,
+    {
-  });
+      seriesName: 'KONOSUBA',
+      seasonNumber: 1,
+    },
+  );
   assert.deepEqual(parseEpisodePathFromDisplay('Frieren S2E10 Something'), {
     seriesName: 'Frieren',
     seasonNumber: 2,

launcher/mpv.ts

@@ -6,7 +6,7 @@ import { spawn, spawnSync } from 'node:child_process';
 import type { LogLevel, Backend, Args, MpvTrack } from './types.js';
 import { DEFAULT_MPV_SUBMINER_ARGS, DEFAULT_YOUTUBE_YTDL_FORMAT } from './types.js';
 import { log, fail, getMpvLogPath } from './log.js';
-import { buildSubminerScriptOpts, inferAniSkipMetadataForFile } from './aniskip-metadata.js';
+import { buildSubminerScriptOpts, resolveAniSkipMetadataForFile } from './aniskip-metadata.js';
 import {
   commandExists,
   isExecutable,
@@ -419,7 +419,7 @@ export async function loadSubtitleIntoMpv(
   }
 }
 
-export function startMpv(
+export async function startMpv(
   target: string,
   targetKind: 'file' | 'url',
   args: Args,
@@ -479,7 +479,8 @@ export function startMpv(
   if (options?.startPaused) {
     mpvArgs.push('--pause=yes');
   }
-  const aniSkipMetadata = targetKind === 'file' ? inferAniSkipMetadataForFile(target) : null;
+  const aniSkipMetadata =
+    targetKind === 'file' ? await resolveAniSkipMetadataForFile(target) : null;
   const scriptOpts = buildSubminerScriptOpts(appPath, socketPath, aniSkipMetadata);
   if (aniSkipMetadata) {
     log(

package.json

@@ -1,6 +1,6 @@
 {
   "name": "subminer",
-  "version": "0.2.2",
+  "version": "0.3.0",
   "description": "All-in-one sentence mining overlay with AnkiConnect and dictionary integration",
   "packageManager": "bun@1.3.5",
   "main": "dist/main-entry.js",
@@ -23,8 +23,8 @@
     "test:plugin:src": "lua scripts/test-plugin-start-gate.lua",
     "test:launcher:smoke:src": "bun test launcher/smoke.e2e.test.ts",
     "test:launcher:src": "bun test launcher/config.test.ts launcher/config-domain-parsers.test.ts launcher/parse-args.test.ts launcher/main.test.ts launcher/commands/command-modules.test.ts launcher/smoke.e2e.test.ts && bun run test:plugin:src",
-    "test:core:src": "bun test src/cli/args.test.ts src/cli/help.test.ts src/core/services/cli-command.test.ts src/core/services/field-grouping-overlay.test.ts src/core/services/numeric-shortcut-session.test.ts src/core/services/secondary-subtitle.test.ts src/core/services/mpv-render-metrics.test.ts src/core/services/overlay-content-measurement.test.ts src/core/services/mpv-control.test.ts src/core/services/mpv.test.ts src/core/services/runtime-options-ipc.test.ts src/core/services/runtime-config.test.ts src/core/services/config-hot-reload.test.ts src/core/services/discord-presence.test.ts src/core/services/tokenizer.test.ts src/core/services/tokenizer/annotation-stage.test.ts src/core/services/tokenizer/parser-selection-stage.test.ts src/core/services/tokenizer/parser-enrichment-stage.test.ts src/core/services/subsync.test.ts src/core/services/overlay-bridge.test.ts src/core/services/overlay-shortcut-handler.test.ts src/core/services/mining.test.ts src/core/services/anki-jimaku.test.ts src/core/services/jimaku-download-path.test.ts src/core/services/jellyfin.test.ts src/core/services/jellyfin-remote.test.ts src/core/services/immersion-tracker-service.test.ts src/core/services/overlay-runtime-init.test.ts src/core/services/app-ready.test.ts src/core/services/startup-bootstrap.test.ts src/core/services/subtitle-processing-controller.test.ts src/core/services/anilist/anilist-update-queue.test.ts src/core/utils/shortcut-config.test.ts src/renderer/error-recovery.test.ts src/renderer/subtitle-render.test.ts src/renderer/handlers/mouse.test.ts src/renderer/modals/jimaku.test.ts src/subsync/utils.test.ts src/main/anilist-url-guard.test.ts src/window-trackers/x11-tracker.test.ts launcher/config.test.ts launcher/config-domain-parsers.test.ts launcher/parse-args.test.ts launcher/main.test.ts launcher/commands/command-modules.test.ts",
+    "test:core:src": "bun test src/cli/args.test.ts src/cli/help.test.ts src/core/services/cli-command.test.ts src/core/services/field-grouping-overlay.test.ts src/core/services/numeric-shortcut-session.test.ts src/core/services/secondary-subtitle.test.ts src/core/services/mpv-render-metrics.test.ts src/core/services/overlay-content-measurement.test.ts src/core/services/mpv-control.test.ts src/core/services/mpv.test.ts src/core/services/runtime-options-ipc.test.ts src/core/services/runtime-config.test.ts src/core/services/config-hot-reload.test.ts src/core/services/discord-presence.test.ts src/core/services/tokenizer.test.ts src/core/services/tokenizer/annotation-stage.test.ts src/core/services/tokenizer/parser-selection-stage.test.ts src/core/services/tokenizer/parser-enrichment-stage.test.ts src/core/services/subsync.test.ts src/core/services/overlay-bridge.test.ts src/core/services/overlay-shortcut-handler.test.ts src/core/services/mining.test.ts src/core/services/anki-jimaku.test.ts src/core/services/jimaku-download-path.test.ts src/core/services/jellyfin.test.ts src/core/services/jellyfin-remote.test.ts src/core/services/immersion-tracker-service.test.ts src/core/services/overlay-runtime-init.test.ts src/core/services/app-ready.test.ts src/core/services/startup-bootstrap.test.ts src/core/services/subtitle-processing-controller.test.ts src/core/services/anilist/anilist-update-queue.test.ts src/core/utils/shortcut-config.test.ts src/renderer/error-recovery.test.ts src/renderer/subtitle-render.test.ts src/renderer/handlers/mouse.test.ts src/renderer/handlers/keyboard.test.ts src/renderer/modals/jimaku.test.ts src/subsync/utils.test.ts src/main/anilist-url-guard.test.ts src/window-trackers/x11-tracker.test.ts launcher/config.test.ts launcher/config-domain-parsers.test.ts launcher/parse-args.test.ts launcher/main.test.ts launcher/commands/command-modules.test.ts",
-    "test:core:dist": "bun test dist/cli/args.test.js dist/cli/help.test.js dist/core/services/cli-command.test.js dist/core/services/ipc.test.js dist/core/services/anki-jimaku-ipc.test.js dist/core/services/field-grouping-overlay.test.js dist/core/services/numeric-shortcut-session.test.js dist/core/services/secondary-subtitle.test.js dist/core/services/mpv-render-metrics.test.js dist/core/services/overlay-content-measurement.test.js dist/core/services/mpv-control.test.js dist/core/services/mpv.test.js dist/core/services/runtime-options-ipc.test.js dist/core/services/runtime-config.test.js dist/core/services/config-hot-reload.test.js dist/core/services/discord-presence.test.js dist/core/services/tokenizer.test.js dist/core/services/tokenizer/annotation-stage.test.js dist/core/services/tokenizer/parser-selection-stage.test.js dist/core/services/tokenizer/parser-enrichment-stage.test.js dist/core/services/subsync.test.js dist/core/services/overlay-bridge.test.js dist/core/services/overlay-manager.test.js dist/core/services/overlay-shortcut-handler.test.js dist/core/services/mining.test.js dist/core/services/anki-jimaku.test.js dist/core/services/jimaku-download-path.test.js dist/core/services/jellyfin.test.js dist/core/services/jellyfin-remote.test.js dist/core/services/immersion-tracker-service.test.js dist/core/services/overlay-runtime-init.test.js dist/core/services/app-ready.test.js dist/core/services/startup-bootstrap.test.js dist/core/services/subtitle-processing-controller.test.js dist/core/services/anilist/anilist-token-store.test.js dist/core/services/anilist/anilist-update-queue.test.js dist/renderer/error-recovery.test.js dist/renderer/subtitle-render.test.js dist/renderer/handlers/mouse.test.js dist/renderer/modals/jimaku.test.js dist/subsync/utils.test.js dist/main/anilist-url-guard.test.js dist/window-trackers/x11-tracker.test.js",
+    "test:core:dist": "bun test dist/cli/args.test.js dist/cli/help.test.js dist/core/services/cli-command.test.js dist/core/services/ipc.test.js dist/core/services/anki-jimaku-ipc.test.js dist/core/services/field-grouping-overlay.test.js dist/core/services/numeric-shortcut-session.test.js dist/core/services/secondary-subtitle.test.js dist/core/services/mpv-render-metrics.test.js dist/core/services/overlay-content-measurement.test.js dist/core/services/mpv-control.test.js dist/core/services/mpv.test.js dist/core/services/runtime-options-ipc.test.js dist/core/services/runtime-config.test.js dist/core/services/config-hot-reload.test.js dist/core/services/discord-presence.test.js dist/core/services/tokenizer.test.js dist/core/services/tokenizer/annotation-stage.test.js dist/core/services/tokenizer/parser-selection-stage.test.js dist/core/services/tokenizer/parser-enrichment-stage.test.js dist/core/services/subsync.test.js dist/core/services/overlay-bridge.test.js dist/core/services/overlay-manager.test.js dist/core/services/overlay-shortcut-handler.test.js dist/core/services/mining.test.js dist/core/services/anki-jimaku.test.js dist/core/services/jimaku-download-path.test.js dist/core/services/jellyfin.test.js dist/core/services/jellyfin-remote.test.js dist/core/services/immersion-tracker-service.test.js dist/core/services/overlay-runtime-init.test.js dist/core/services/app-ready.test.js dist/core/services/startup-bootstrap.test.js dist/core/services/subtitle-processing-controller.test.js dist/core/services/anilist/anilist-token-store.test.js dist/core/services/anilist/anilist-update-queue.test.js dist/renderer/error-recovery.test.js dist/renderer/subtitle-render.test.js dist/renderer/handlers/mouse.test.js dist/renderer/handlers/keyboard.test.js dist/renderer/modals/jimaku.test.js dist/subsync/utils.test.js dist/main/anilist-url-guard.test.js dist/window-trackers/x11-tracker.test.js",
     "test:core:smoke:dist": "bun test dist/cli/help.test.js dist/core/services/runtime-config.test.js dist/core/services/ipc.test.js dist/core/services/overlay-manager.test.js dist/core/services/anilist/anilist-token-store.test.js dist/core/services/startup-bootstrap.test.js dist/renderer/error-recovery.test.js dist/main/anilist-url-guard.test.js dist/window-trackers/x11-tracker.test.js",
     "test:smoke:dist": "bun run test:config:smoke:dist && bun run test:core:smoke:dist",
     "test:subtitle:dist": "echo \"Subtitle tests are currently not configured\"",

plugin/subminer.conf

@@ -53,6 +53,9 @@ aniskip_mal_id=
 # Force episode number (optional). Leave blank for filename/title detection.
 aniskip_episode=
 
+# Optional pre-fetched AniSkip payload for this media (JSON or base64 JSON). When set, the plugin uses this directly and skips network lookup.
+aniskip_payload=
+
 # Show intro skip OSD button while inside OP range.
 aniskip_show_button=yes
 

plugin/subminer/aniskip.lua

@@ -13,6 +13,12 @@ function M.create(ctx)
 	local mal_lookup_cache = {}
 	local payload_cache = {}
 	local title_context_cache = {}
+	local base64_reverse = {}
+	local base64_chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
+
+	for i = 1, #base64_chars do
+		base64_reverse[base64_chars:sub(i, i)] = i - 1
+	end
 
 	local function url_encode(text)
 		if type(text) ~= "string" then
@@ -25,6 +31,109 @@ function M.create(ctx)
 		return encoded:gsub(" ", "%%20")
 	end
 
+	local function parse_json_payload(text)
+		if type(text) ~= "string" then
+			return nil
+		end
+		local parsed, parse_error = utils.parse_json(text)
+		if type(parsed) == "table" then
+			return parsed
+		end
+		return nil, parse_error
+	end
+
+	local function decode_base64(input)
+		if type(input) ~= "string" then
+			return nil
+		end
+		local cleaned = input:gsub("%s", ""):gsub("-", "+"):gsub("_", "/")
+		cleaned = cleaned:match("^%s*(.-)%s*$") or ""
+		if cleaned == "" then
+			return nil
+		end
+		if #cleaned % 4 == 1 then
+			return nil
+		end
+		if #cleaned % 4 ~= 0 then
+			cleaned = cleaned .. string.rep("=", 4 - (#cleaned % 4))
+		end
+		if not cleaned:match("^[A-Za-z0-9+/%=]+$") then
+			return nil
+		end
+		local out = {}
+		local out_len = 0
+		for index = 1, #cleaned, 4 do
+			local c1 = cleaned:sub(index, index)
+			local c2 = cleaned:sub(index + 1, index + 1)
+			local c3 = cleaned:sub(index + 2, index + 2)
+			local c4 = cleaned:sub(index + 3, index + 3)
+			local v1 = base64_reverse[c1]
+			local v2 = base64_reverse[c2]
+			if not v1 or not v2 then
+				return nil
+			end
+			local v3 = c3 == "=" and 0 or base64_reverse[c3]
+			local v4 = c4 == "=" and 0 or base64_reverse[c4]
+			if (c3 ~= "=" and not v3) or (c4 ~= "=" and not v4) then
+				return nil
+			end
+			local n = (((v1 * 64 + v2) * 64 + v3) * 64 + v4)
+			local b1 = math.floor(n / 65536)
+			local remaining = n % 65536
+			local b2 = math.floor(remaining / 256)
+			local b3 = remaining % 256
+			out_len = out_len + 1
+			out[out_len] = string.char(b1)
+			if c3 ~= "=" then
+				out_len = out_len + 1
+				out[out_len] = string.char(b2)
+			end
+			if c4 ~= "=" then
+				out_len = out_len + 1
+				out[out_len] = string.char(b3)
+			end
+		end
+		return table.concat(out)
+	end
+
+	local function resolve_launcher_payload()
+		local raw_payload = type(opts.aniskip_payload) == "string" and opts.aniskip_payload or ""
+		local trimmed = raw_payload:match("^%s*(.-)%s*$") or ""
+		if trimmed == "" then
+			return nil
+		end
+
+		local parsed, parse_error = parse_json_payload(trimmed)
+		if type(parsed) == "table" then
+			return parsed
+		end
+
+		local url_decoded = trimmed:gsub("%%(%x%x)", function(hex)
+			local value = tonumber(hex, 16)
+			if value then
+				return string.char(value)
+			end
+			return "%"
+		end)
+		if url_decoded ~= trimmed then
+			parsed, parse_error = parse_json_payload(url_decoded)
+			if type(parsed) == "table" then
+				return parsed
+			end
+		end
+
+		local b64_decoded = decode_base64(trimmed)
+		if type(b64_decoded) == "string" and b64_decoded ~= "" then
+			parsed, parse_error = parse_json_payload(b64_decoded)
+			if type(parsed) == "table" then
+				return parsed
+			end
+		end
+
+		subminer_log("warn", "aniskip", "Invalid launcher AniSkip payload: " .. tostring(parse_error or "unparseable"))
+		return nil
+	end
+
 	local function run_json_curl_async(url, callback)
 		mp.command_native_async({
 			name = "subprocess",
@@ -296,6 +405,8 @@ function M.create(ctx)
 		state.aniskip.episode = nil
 		state.aniskip.intro_start = nil
 		state.aniskip.intro_end = nil
+		state.aniskip.payload = nil
+		state.aniskip.payload_source = nil
 		remove_aniskip_chapters()
 	end
 
@@ -366,7 +477,17 @@ function M.create(ctx)
 					state.aniskip.intro_end = intro_end
 					state.aniskip.prompt_shown = false
 					set_intro_chapters(intro_start, intro_end)
-					subminer_log("info", "aniskip", string.format("Intro window %.3f -> %.3f (MAL %d, ep %d)", intro_start, intro_end, mal_id, episode))
+					subminer_log(
+						"info",
+						"aniskip",
+						string.format(
+							"Intro window %.3f -> %.3f (MAL %s, ep %s)",
+							intro_start,
+							intro_end,
+							tostring(mal_id or "-"),
+							tostring(episode or "-")
+						)
+					)
 					return true
 				end
 			end
@@ -374,6 +495,10 @@ function M.create(ctx)
 		return false
 	end
 
+	local function has_launcher_payload()
+		return type(opts.aniskip_payload) == "string" and opts.aniskip_payload:match("%S") ~= nil
+	end
+
 	local function is_launcher_context()
 		local forced_title = type(opts.aniskip_title) == "string" and (opts.aniskip_title:match("^%s*(.-)%s*$") or "") or ""
 		if forced_title ~= "" then
@@ -391,6 +516,9 @@ function M.create(ctx)
 		if forced_season and forced_season > 0 then
 			return true
 		end
+		if has_launcher_payload() then
+			return true
+		end
 		return false
 	end
 
@@ -500,6 +628,18 @@ function M.create(ctx)
 		end)
 	end
 
+	local function fetch_payload_from_launcher(payload, mal_id, title, episode)
+		if not payload then
+			return false
+		end
+		state.aniskip.payload = payload
+		state.aniskip.payload_source = "launcher"
+		state.aniskip.mal_id = mal_id
+		state.aniskip.title = title
+		state.aniskip.episode = episode
+		return apply_aniskip_payload(mal_id, title, episode, payload)
+	end
+
 	local function fetch_aniskip_for_current_media(trigger_source)
 		local trigger = type(trigger_source) == "string" and trigger_source or "manual"
 		if not opts.aniskip_enabled then
@@ -518,6 +658,28 @@ function M.create(ctx)
 			reset_aniskip_fields()
 			local title, episode, season = resolve_title_and_episode()
 			local lookup_titles = resolve_lookup_titles(title)
+			local launcher_payload = resolve_launcher_payload()
+			if launcher_payload then
+				local launcher_mal_id = tonumber(opts.aniskip_mal_id)
+				if not launcher_mal_id then
+					launcher_mal_id = nil
+				end
+				if fetch_payload_from_launcher(launcher_payload, launcher_mal_id, title, episode) then
+					subminer_log(
+						"info",
+						"aniskip",
+						string.format(
+							"Using launcher-provided AniSkip payload (title=%s, season=%s, episode=%s)",
+							tostring(title or ""),
+							tostring(season or "-"),
+							tostring(episode or "-")
+						)
+					)
+					return
+				end
+				subminer_log("info", "aniskip", "Launcher payload present but no OP interval was available")
+				return
+			end
 
 			subminer_log(
 				"info",
@@ -558,6 +720,8 @@ function M.create(ctx)
 						end
 						return
 					end
+					state.aniskip.payload = payload
+					state.aniskip.payload_source = "remote"
 					if not apply_aniskip_payload(mal_id, title, episode, payload) then
 						subminer_log("info", "aniskip", "AniSkip payload did not include OP interval")
 					end

plugin/subminer/options.lua

@@ -17,6 +17,7 @@ function M.load(options_lib, default_socket_path)
 		aniskip_season = "",
 		aniskip_mal_id = "",
 		aniskip_episode = "",
+		aniskip_payload = "",
 		aniskip_show_button = true,
 		aniskip_button_text = "You can skip by pressing %s",
 		aniskip_button_key = "y-k",

plugin/subminer/process.lua

@@ -3,6 +3,8 @@ local M = {}
 local OVERLAY_START_RETRY_DELAY_SECONDS = 0.2
 local OVERLAY_START_MAX_ATTEMPTS = 6
 local AUTO_PLAY_READY_TIMEOUT_SECONDS = 15
+local AUTO_PLAY_READY_LOADING_OSD = "Loading subtitle tokenization..."
+local AUTO_PLAY_READY_READY_OSD = "Subtitle tokenization ready"
 
 function M.create(ctx)
 	local mp = ctx.mp
@@ -14,6 +16,7 @@ function M.create(ctx)
 	local subminer_log = ctx.log.subminer_log
 	local show_osd = ctx.log.show_osd
 	local normalize_log_level = ctx.log.normalize_log_level
+	local run_control_command_async
 
 	local function resolve_visible_overlay_startup()
 		local raw_visible_overlay = opts.auto_start_visible_overlay
@@ -70,28 +73,50 @@ function M.create(ctx)
 		state.auto_play_ready_timeout = nil
 	end
 
-	local function disarm_auto_play_ready_gate()
+	local function clear_auto_play_ready_osd_timer()
+		local timer = state.auto_play_ready_osd_timer
+		if timer and timer.kill then
+			timer:kill()
+		end
+		state.auto_play_ready_osd_timer = nil
+	end
+
+	local function disarm_auto_play_ready_gate(options)
+		local should_resume = options == nil or options.resume_playback ~= false
+		local was_armed = state.auto_play_ready_gate_armed
 		clear_auto_play_ready_timeout()
+		clear_auto_play_ready_osd_timer()
 		state.auto_play_ready_gate_armed = false
+		if was_armed and should_resume then
+			mp.set_property_native("pause", false)
+		end
 	end
 
 	local function release_auto_play_ready_gate(reason)
 		if not state.auto_play_ready_gate_armed then
 			return
 		end
-		disarm_auto_play_ready_gate()
+		disarm_auto_play_ready_gate({ resume_playback = false })
 		mp.set_property_native("pause", false)
-		show_osd("Subtitle annotations loaded")
+		show_osd(AUTO_PLAY_READY_READY_OSD)
 		subminer_log("info", "process", "Resuming playback after startup gate: " .. tostring(reason or "ready"))
 	end
 
 	local function arm_auto_play_ready_gate()
 		if state.auto_play_ready_gate_armed then
 			clear_auto_play_ready_timeout()
+			clear_auto_play_ready_osd_timer()
 		end
 		state.auto_play_ready_gate_armed = true
 		mp.set_property_native("pause", true)
-		show_osd("Loading subtitle annotations...")
+		show_osd(AUTO_PLAY_READY_LOADING_OSD)
+		if type(mp.add_periodic_timer) == "function" then
+			state.auto_play_ready_osd_timer = mp.add_periodic_timer(2.5, function()
+				if state.auto_play_ready_gate_armed then
+					show_osd(AUTO_PLAY_READY_LOADING_OSD)
+				end
+			end)
+		end
 		subminer_log("info", "process", "Pausing playback until SubMiner overlay/tokenization readiness signal")
 		state.auto_play_ready_timeout = mp.add_timeout(AUTO_PLAY_READY_TIMEOUT_SECONDS, function()
 			if not state.auto_play_ready_gate_armed then
@@ -108,6 +133,11 @@ function M.create(ctx)
 
 	local function notify_auto_play_ready()
 		release_auto_play_ready_gate("tokenization-ready")
+		if state.overlay_running and resolve_visible_overlay_startup() then
+			run_control_command_async("show-visible-overlay", {
+				socket_path = opts.socket_path,
+			})
+		end
 	end
 
 	local function build_command_args(action, overrides)
@@ -132,22 +162,18 @@ function M.create(ctx)
 			table.insert(args, "--socket")
 			table.insert(args, socket_path)
 
-			-- Keep auto-start --start requests idempotent for second-instance handling.
+			local should_show_visible = resolve_visible_overlay_startup()
-			-- Visibility is applied as a separate control command after startup.
+			if should_show_visible then
-			if overrides.auto_start_trigger ~= true then
+				table.insert(args, "--show-visible-overlay")
-				local should_show_visible = resolve_visible_overlay_startup()
+			else
-				if should_show_visible then
+				table.insert(args, "--hide-visible-overlay")
-					table.insert(args, "--show-visible-overlay")
-				else
-					table.insert(args, "--hide-visible-overlay")
-				end
 			end
 		end
 
 		return args
 	end
 
-	local function run_control_command_async(action, overrides, callback)
+	run_control_command_async = function(action, overrides, callback)
 		local args = build_command_args(action, overrides)
 		subminer_log("debug", "process", "Control command: " .. table.concat(args, " "))
 		mp.command_native_async({
@@ -251,6 +277,24 @@ function M.create(ctx)
 		if state.overlay_running then
 			if overrides.auto_start_trigger == true then
 				subminer_log("debug", "process", "Auto-start ignored because overlay is already running")
+				local socket_path = overrides.socket_path or opts.socket_path
+				local should_pause_until_ready = (
+					resolve_visible_overlay_startup()
+					and resolve_pause_until_ready()
+					and has_matching_mpv_ipc_socket(socket_path)
+				)
+				if should_pause_until_ready then
+					arm_auto_play_ready_gate()
+				else
+					disarm_auto_play_ready_gate()
+				end
+				local visibility_action = resolve_visible_overlay_startup()
+						and "show-visible-overlay"
+					or "hide-visible-overlay"
+				run_control_command_async(visibility_action, {
+					socket_path = socket_path,
+					log_level = overrides.log_level,
+				})
 				return
 			end
 			subminer_log("info", "process", "Overlay already running")
@@ -287,7 +331,7 @@ function M.create(ctx)
 				)
 			end
 
-			if attempt == 1 then
+			if attempt == 1 and not state.auto_play_ready_gate_armed then
 				show_osd("Starting...")
 			end
 			state.overlay_running = true
@@ -319,9 +363,10 @@ function M.create(ctx)
 					local visibility_action = resolve_visible_overlay_startup()
 							and "show-visible-overlay"
 						or "hide-visible-overlay"
-					run_control_command_async(visibility_action, {
+						run_control_command_async(visibility_action, {
-						log_level = overrides.log_level,
+							socket_path = socket_path,
-					})
+							log_level = overrides.log_level,
+						})
 				end
 
 			end)

plugin/subminer/state.lua

@@ -24,11 +24,14 @@ function M.new()
 			episode = nil,
 			intro_start = nil,
 			intro_end = nil,
+			payload = nil,
+			payload_source = nil,
 			found = false,
 			prompt_shown = false,
 		},
 		auto_play_ready_gate_armed = false,
 		auto_play_ready_timeout = nil,
+		auto_play_ready_osd_timer = nil,
 	}
 end
 

scripts/test-plugin-start-gate.lua

@@ -9,6 +9,7 @@ local function run_plugin_scenario(config)
 		osd = {},
 		logs = {},
 		property_sets = {},
+		periodic_timers = {},
 	}
 
 	local function make_mp_stub()
@@ -90,10 +91,32 @@ local function run_plugin_scenario(config)
 			end
 		end
 
-		function mp.add_timeout(_seconds, callback)
+		function mp.add_timeout(seconds, callback)
-			if callback then
+			local timeout = {
+				killed = false,
+			}
+			function timeout:kill()
+				self.killed = true
+			end
+
+			local delay = tonumber(seconds) or 0
+			if callback and delay < 5 then
 				callback()
 			end
+			return timeout
+		end
+
+		function mp.add_periodic_timer(seconds, callback)
+			local timer = {
+				seconds = seconds,
+				killed = false,
+				callback = callback,
+			}
+			function timer:kill()
+				self.killed = true
+			end
+			recorded.periodic_timers[#recorded.periodic_timers + 1] = timer
+			return timer
 		end
 
 		function mp.register_script_message(name, fn)
@@ -281,6 +304,26 @@ local function find_control_call(async_calls, flag)
 	return nil
 end
 
+local function count_control_calls(async_calls, flag)
+	local count = 0
+	for _, call in ipairs(async_calls) do
+		local args = call.args or {}
+		local has_flag = false
+		local has_start = false
+		for _, value in ipairs(args) do
+			if value == flag then
+				has_flag = true
+			elseif value == "--start" then
+				has_start = true
+			end
+		end
+		if has_flag and not has_start then
+			count = count + 1
+		end
+	end
+	return count
+end
+
 local function call_has_arg(call, target)
 	local args = (call and call.args) or {}
 	for _, value in ipairs(args) do
@@ -352,6 +395,16 @@ local function count_osd_message(messages, target)
 	return count
 end
 
+local function count_property_set(property_sets, name, value)
+	local count = 0
+	for _, call in ipairs(property_sets) do
+		if call.name == name and call.value == value then
+			count = count + 1
+		end
+	end
+	return count
+end
+
 local function fire_event(recorded, name)
 	local listeners = recorded.events[name] or {}
 	for _, listener in ipairs(listeners) do
@@ -454,12 +507,12 @@ do
 	local start_call = find_start_call(recorded.async_calls)
 	assert_true(start_call ~= nil, "auto-start should issue --start command")
 	assert_true(
-		not call_has_arg(start_call, "--show-visible-overlay"),
+		call_has_arg(start_call, "--show-visible-overlay"),
-		"auto-start should keep --start command free of --show-visible-overlay"
+		"auto-start with visible overlay enabled should include --show-visible-overlay on --start"
 	)
 	assert_true(
 		not call_has_arg(start_call, "--hide-visible-overlay"),
-		"auto-start should keep --start command free of --hide-visible-overlay"
+		"auto-start with visible overlay enabled should not include --hide-visible-overlay on --start"
 	)
 	assert_true(
 		find_control_call(recorded.async_calls, "--show-visible-overlay") ~= nil,
@@ -493,12 +546,64 @@ do
 		count_start_calls(recorded.async_calls) == 1,
 		"duplicate file-loaded events should not issue duplicate --start commands while overlay is already running"
 	)
+	assert_true(
+		count_control_calls(recorded.async_calls, "--show-visible-overlay") == 2,
+		"duplicate auto-start should re-assert visible overlay state when overlay is already running"
+	)
 	assert_true(
 		count_osd_message(recorded.osd, "SubMiner: Already running") == 0,
 		"duplicate auto-start events should not show Already running OSD"
 	)
 end
 
+do
+	local recorded, err = run_plugin_scenario({
+		process_list = "",
+		option_overrides = {
+			binary_path = binary_path,
+			auto_start = "yes",
+			auto_start_visible_overlay = "yes",
+			auto_start_pause_until_ready = "yes",
+			socket_path = "/tmp/subminer-socket",
+		},
+		input_ipc_server = "/tmp/subminer-socket",
+		media_title = "Random Movie",
+		files = {
+			[binary_path] = true,
+		},
+	})
+	assert_true(recorded ~= nil, "plugin failed to load for duplicate auto-start pause-until-ready scenario: " .. tostring(err))
+	fire_event(recorded, "file-loaded")
+	assert_true(recorded.script_messages["subminer-autoplay-ready"] ~= nil, "subminer-autoplay-ready script message not registered")
+	recorded.script_messages["subminer-autoplay-ready"]()
+	fire_event(recorded, "file-loaded")
+	recorded.script_messages["subminer-autoplay-ready"]()
+	assert_true(
+		count_start_calls(recorded.async_calls) == 1,
+		"duplicate pause-until-ready auto-start should not issue duplicate --start commands while overlay is already running"
+	)
+	assert_true(
+		count_control_calls(recorded.async_calls, "--show-visible-overlay") == 4,
+		"duplicate pause-until-ready auto-start should re-assert visible overlay on both start and ready events"
+	)
+	assert_true(
+		count_osd_message(recorded.osd, "SubMiner: Loading subtitle tokenization...") == 2,
+		"duplicate pause-until-ready auto-start should arm tokenization loading gate for each file"
+	)
+	assert_true(
+		count_osd_message(recorded.osd, "SubMiner: Subtitle tokenization ready") == 2,
+		"duplicate pause-until-ready auto-start should release tokenization gate for each file"
+	)
+	assert_true(
+		count_property_set(recorded.property_sets, "pause", true) == 2,
+		"duplicate pause-until-ready auto-start should force pause for each file"
+	)
+	assert_true(
+		count_property_set(recorded.property_sets, "pause", false) == 2,
+		"duplicate pause-until-ready auto-start should resume playback for each file"
+	)
+end
+
 do
 	local recorded, err = run_plugin_scenario({
 		process_list = "",
@@ -528,13 +633,58 @@ do
 		"autoplay-ready script message should resume mpv playback"
 	)
 	assert_true(
-		has_osd_message(recorded.osd, "SubMiner: Loading subtitle annotations..."),
+		has_osd_message(recorded.osd, "SubMiner: Loading subtitle tokenization..."),
 		"pause-until-ready auto-start should show loading OSD message"
 	)
 	assert_true(
-		has_osd_message(recorded.osd, "SubMiner: Subtitle annotations loaded"),
+		not has_osd_message(recorded.osd, "SubMiner: Starting..."),
+		"pause-until-ready auto-start should avoid replacing loading OSD with generic starting OSD"
+	)
+	assert_true(
+		has_osd_message(recorded.osd, "SubMiner: Subtitle tokenization ready"),
 		"autoplay-ready should show loaded OSD message"
 	)
+	assert_true(
+		count_control_calls(recorded.async_calls, "--show-visible-overlay") == 2,
+		"autoplay-ready should re-assert visible overlay state"
+	)
+	assert_true(
+		#recorded.periodic_timers == 1,
+		"pause-until-ready auto-start should create periodic loading OSD refresher"
+	)
+	assert_true(
+		recorded.periodic_timers[1].killed == true,
+		"autoplay-ready should stop periodic loading OSD refresher"
+	)
+end
+
+do
+	local recorded, err = run_plugin_scenario({
+		process_list = "",
+		option_overrides = {
+			binary_path = binary_path,
+			auto_start = "yes",
+			auto_start_visible_overlay = "yes",
+			auto_start_pause_until_ready = "yes",
+			socket_path = "/tmp/subminer-socket",
+		},
+		input_ipc_server = "/tmp/subminer-socket",
+		media_title = "Random Movie",
+		files = {
+			[binary_path] = true,
+		},
+	})
+	assert_true(recorded ~= nil, "plugin failed to load for pause cleanup scenario: " .. tostring(err))
+	fire_event(recorded, "file-loaded")
+	fire_event(recorded, "end-file")
+	assert_true(
+		count_property_set(recorded.property_sets, "pause", true) == 1,
+		"pause cleanup scenario should force pause while waiting for tokenization"
+	)
+	assert_true(
+		count_property_set(recorded.property_sets, "pause", false) == 1,
+		"ending file while gate is armed should clear forced pause state"
+	)
 end
 
 do
@@ -557,12 +707,12 @@ do
 	local start_call = find_start_call(recorded.async_calls)
 	assert_true(start_call ~= nil, "auto-start should issue --start command")
 	assert_true(
-		not call_has_arg(start_call, "--hide-visible-overlay"),
+		call_has_arg(start_call, "--hide-visible-overlay"),
-		"auto-start should keep --start command free of --hide-visible-overlay"
+		"auto-start with visible overlay disabled should include --hide-visible-overlay on --start"
 	)
 	assert_true(
 		not call_has_arg(start_call, "--show-visible-overlay"),
-		"auto-start should keep --start command free of --show-visible-overlay"
+		"auto-start with visible overlay disabled should not include --show-visible-overlay on --start"
 	)
 	assert_true(
 		find_control_call(recorded.async_calls, "--hide-visible-overlay") ~= nil,

src/anki-integration.ts

@@ -86,8 +86,7 @@ function extractFilenameFromMediaPath(rawPath: string): string {
   }
 
   const separatorIndex = trimmedPath.search(/[?#]/);
-  const pathWithoutQuery =
+  const pathWithoutQuery = separatorIndex >= 0 ? trimmedPath.slice(0, separatorIndex) : trimmedPath;
-    separatorIndex >= 0 ? trimmedPath.slice(0, separatorIndex) : trimmedPath;
   return decodeURIComponentSafe(path.basename(pathWithoutQuery));
 }
 

src/cli/args.test.ts

@@ -1,6 +1,11 @@
 import test from 'node:test';
 import assert from 'node:assert/strict';
-import { hasExplicitCommand, parseArgs, shouldRunSettingsOnlyStartup, shouldStartApp } from './args';
+import {
+  hasExplicitCommand,
+  parseArgs,
+  shouldRunSettingsOnlyStartup,
+  shouldStartApp,
+} from './args';
 
 test('parseArgs parses booleans and value flags', () => {
   const args = parseArgs([
@@ -148,10 +153,7 @@ test('hasExplicitCommand and shouldStartApp preserve command intent', () => {
     '/tmp/subminer-jf-response.json',
   ]);
   assert.equal(jellyfinPreviewAuth.jellyfinPreviewAuth, true);
-  assert.equal(
+  assert.equal(jellyfinPreviewAuth.jellyfinResponsePath, '/tmp/subminer-jf-response.json');
-    jellyfinPreviewAuth.jellyfinResponsePath,
-    '/tmp/subminer-jf-response.json',
-  );
   assert.equal(hasExplicitCommand(jellyfinPreviewAuth), true);
   assert.equal(shouldStartApp(jellyfinPreviewAuth), false);
 

src/cli/args.ts

@@ -240,7 +240,9 @@ export function parseArgs(argv: string[]): CliArgs {
       if (value === 'true' || value === '1' || value === 'yes') args.jellyfinRecursive = true;
       if (value === 'false' || value === '0' || value === 'no') args.jellyfinRecursive = false;
     } else if (arg === '--jellyfin-recursive') {
-      const value = readValue(argv[i + 1])?.trim().toLowerCase();
+      const value = readValue(argv[i + 1])
+        ?.trim()
+        .toLowerCase();
       if (value === 'false' || value === '0' || value === 'no') {
         args.jellyfinRecursive = false;
       } else if (value === 'true' || value === '1' || value === 'yes') {

src/config/config.test.ts

@@ -33,6 +33,7 @@ test('loads defaults when config is missing', () => {
   assert.equal(config.subtitleStyle.backgroundColor, 'rgb(30, 32, 48, 0.88)');
   assert.equal(config.subtitleStyle.preserveLineBreaks, false);
   assert.equal(config.subtitleStyle.autoPauseVideoOnHover, true);
+  assert.equal(config.subtitleStyle.autoPauseVideoOnYomitanPopup, false);
   assert.equal(config.subtitleStyle.hoverTokenColor, '#f4dbd6');
   assert.equal(config.subtitleStyle.hoverTokenBackgroundColor, 'rgba(54, 58, 79, 0.84)');
   assert.equal(
@@ -47,7 +48,10 @@ test('loads defaults when config is missing', () => {
   assert.equal(config.subtitleStyle.textRendering, 'geometricPrecision');
   assert.equal(config.subtitleStyle.textShadow, '0 3px 10px rgba(0,0,0,0.69)');
   assert.equal(config.subtitleStyle.backdropFilter, 'blur(6px)');
-  assert.equal(config.subtitleStyle.secondary.fontFamily, 'Inter, Noto Sans, Helvetica Neue, sans-serif');
+  assert.equal(
+    config.subtitleStyle.secondary.fontFamily,
+    'Inter, Noto Sans, Helvetica Neue, sans-serif',
+  );
   assert.equal(config.subtitleStyle.secondary.fontColor, '#cad3f5');
   assert.equal(config.immersionTracking.enabled, true);
   assert.equal(config.immersionTracking.dbPath, '');
@@ -157,6 +161,44 @@ test('parses subtitleStyle.autoPauseVideoOnHover and warns on invalid values', (
   );
 });
 
+test('parses subtitleStyle.autoPauseVideoOnYomitanPopup and warns on invalid values', () => {
+  const validDir = makeTempDir();
+  fs.writeFileSync(
+    path.join(validDir, 'config.jsonc'),
+    `{
+      "subtitleStyle": {
+        "autoPauseVideoOnYomitanPopup": true
+      }
+    }`,
+    'utf-8',
+  );
+
+  const validService = new ConfigService(validDir);
+  assert.equal(validService.getConfig().subtitleStyle.autoPauseVideoOnYomitanPopup, true);
+
+  const invalidDir = makeTempDir();
+  fs.writeFileSync(
+    path.join(invalidDir, 'config.jsonc'),
+    `{
+      "subtitleStyle": {
+        "autoPauseVideoOnYomitanPopup": "yes"
+      }
+    }`,
+    'utf-8',
+  );
+
+  const invalidService = new ConfigService(invalidDir);
+  assert.equal(
+    invalidService.getConfig().subtitleStyle.autoPauseVideoOnYomitanPopup,
+    DEFAULT_CONFIG.subtitleStyle.autoPauseVideoOnYomitanPopup,
+  );
+  assert.ok(
+    invalidService
+      .getWarnings()
+      .some((warning) => warning.path === 'subtitleStyle.autoPauseVideoOnYomitanPopup'),
+  );
+});
+
 test('parses subtitleStyle.hoverTokenColor and warns on invalid values', () => {
   const validDir = makeTempDir();
   fs.writeFileSync(

src/config/definitions/defaults-core.ts

@@ -50,6 +50,7 @@ export const CORE_DEFAULT_CONFIG: Pick<
     alass_path: '',
     ffsubsync_path: '',
     ffmpeg_path: '',
+    replace: true,
   },
   startupWarmups: {
     lowPowerMode: false,

src/config/definitions/defaults-subtitle.ts

@@ -5,6 +5,7 @@ export const SUBTITLE_DEFAULT_CONFIG: Pick<ResolvedConfig, 'subtitleStyle'> = {
     enableJlpt: false,
     preserveLineBreaks: false,
     autoPauseVideoOnHover: true,
+    autoPauseVideoOnYomitanPopup: false,
     hoverTokenColor: '#f4dbd6',
     hoverTokenBackgroundColor: 'rgba(54, 58, 79, 0.84)',
     fontFamily: 'M PLUS 1 Medium, Source Han Sans JP, Noto Sans CJK JP',

src/config/definitions/domain-registry.test.ts

@@ -20,6 +20,7 @@ test('config option registry includes critical paths and has unique entries', ()
     'logging.level',
     'startupWarmups.lowPowerMode',
     'subtitleStyle.enableJlpt',
+    'subtitleStyle.autoPauseVideoOnYomitanPopup',
     'ankiConnect.enabled',
     'immersionTracking.enabled',
   ]) {

src/config/definitions/options-core.ts

@@ -32,6 +32,12 @@ export function buildCoreConfigOptionRegistry(
       defaultValue: defaultConfig.subsync.defaultMode,
       description: 'Subsync default mode.',
     },
+    {
+      path: 'subsync.replace',
+      kind: 'boolean',
+      defaultValue: defaultConfig.subsync.replace,
+      description: 'Replace the active subtitle file when sync completes.',
+    },
     {
       path: 'startupWarmups.lowPowerMode',
       kind: 'boolean',

src/config/definitions/options-subtitle.ts

@@ -28,6 +28,13 @@ export function buildSubtitleConfigOptionRegistry(
       description:
         'Automatically pause mpv playback while hovering subtitle text, then resume on leave.',
     },
+    {
+      path: 'subtitleStyle.autoPauseVideoOnYomitanPopup',
+      kind: 'boolean',
+      defaultValue: defaultConfig.subtitleStyle.autoPauseVideoOnYomitanPopup,
+      description:
+        'Automatically pause mpv playback while Yomitan popup is open, then resume when popup closes.',
+    },
     {
       path: 'subtitleStyle.hoverTokenColor',
       kind: 'string',

src/config/definitions/shared.ts

@@ -44,6 +44,8 @@ export const SPECIAL_COMMANDS = {
   RUNTIME_OPTION_CYCLE_PREFIX: '__runtime-option-cycle:',
   REPLAY_SUBTITLE: '__replay-subtitle',
   PLAY_NEXT_SUBTITLE: '__play-next-subtitle',
+  SHIFT_SUB_DELAY_TO_NEXT_SUBTITLE_START: '__sub-delay-next-line',
+  SHIFT_SUB_DELAY_TO_PREVIOUS_SUBTITLE_START: '__sub-delay-prev-line',
 } as const;
 
 export const DEFAULT_KEYBINDINGS: NonNullable<ResolvedConfig['keybindings']> = [
@@ -56,6 +58,11 @@ export const DEFAULT_KEYBINDINGS: NonNullable<ResolvedConfig['keybindings']> = [
   { key: 'ArrowDown', command: ['seek', -60] },
   { key: 'Shift+KeyH', command: ['sub-seek', -1] },
   { key: 'Shift+KeyL', command: ['sub-seek', 1] },
+  { key: 'Shift+BracketRight', command: [SPECIAL_COMMANDS.SHIFT_SUB_DELAY_TO_NEXT_SUBTITLE_START] },
+  {
+    key: 'Shift+BracketLeft',
+    command: [SPECIAL_COMMANDS.SHIFT_SUB_DELAY_TO_PREVIOUS_SUBTITLE_START],
+  },
   { key: 'Ctrl+Shift+KeyH', command: [SPECIAL_COMMANDS.REPLAY_SUBTITLE] },
   { key: 'Ctrl+Shift+KeyL', command: [SPECIAL_COMMANDS.PLAY_NEXT_SUBTITLE] },
   { key: 'KeyQ', command: ['quit'] },

src/config/resolve/core-domains.ts

@@ -173,6 +173,12 @@ export function applyCoreDomainConfig(context: ResolveContext): void {
     if (ffsubsync !== undefined) resolved.subsync.ffsubsync_path = ffsubsync;
     const ffmpeg = asString(src.subsync.ffmpeg_path);
     if (ffmpeg !== undefined) resolved.subsync.ffmpeg_path = ffmpeg;
+    const replace = asBoolean(src.subsync.replace);
+    if (replace !== undefined) {
+      resolved.subsync.replace = replace;
+    } else if (src.subsync.replace !== undefined) {
+      warn('subsync.replace', src.subsync.replace, resolved.subsync.replace, 'Expected boolean.');
+    }
   }
 
   if (isObject(src.subtitlePosition)) {

src/config/resolve/subtitle-domains.ts

@@ -99,8 +99,9 @@ export function applySubtitleDomainConfig(context: ResolveContext): void {
   if (isObject(src.subtitleStyle)) {
     const fallbackSubtitleStyleEnableJlpt = resolved.subtitleStyle.enableJlpt;
     const fallbackSubtitleStylePreserveLineBreaks = resolved.subtitleStyle.preserveLineBreaks;
-    const fallbackSubtitleStyleAutoPauseVideoOnHover =
+    const fallbackSubtitleStyleAutoPauseVideoOnHover = resolved.subtitleStyle.autoPauseVideoOnHover;
-      resolved.subtitleStyle.autoPauseVideoOnHover;
+    const fallbackSubtitleStyleAutoPauseVideoOnYomitanPopup =
+      resolved.subtitleStyle.autoPauseVideoOnYomitanPopup;
     const fallbackSubtitleStyleHoverTokenColor = resolved.subtitleStyle.hoverTokenColor;
     const fallbackSubtitleStyleHoverTokenBackgroundColor =
       resolved.subtitleStyle.hoverTokenBackgroundColor;
@@ -161,8 +162,7 @@ export function applySubtitleDomainConfig(context: ResolveContext): void {
     if (autoPauseVideoOnHover !== undefined) {
       resolved.subtitleStyle.autoPauseVideoOnHover = autoPauseVideoOnHover;
     } else if (
-      (src.subtitleStyle as { autoPauseVideoOnHover?: unknown }).autoPauseVideoOnHover !==
+      (src.subtitleStyle as { autoPauseVideoOnHover?: unknown }).autoPauseVideoOnHover !== undefined
-      undefined
     ) {
       resolved.subtitleStyle.autoPauseVideoOnHover = fallbackSubtitleStyleAutoPauseVideoOnHover;
       warn(
@@ -173,6 +173,27 @@ export function applySubtitleDomainConfig(context: ResolveContext): void {
       );
     }
 
+    const autoPauseVideoOnYomitanPopup = asBoolean(
+      (src.subtitleStyle as { autoPauseVideoOnYomitanPopup?: unknown })
+        .autoPauseVideoOnYomitanPopup,
+    );
+    if (autoPauseVideoOnYomitanPopup !== undefined) {
+      resolved.subtitleStyle.autoPauseVideoOnYomitanPopup = autoPauseVideoOnYomitanPopup;
+    } else if (
+      (src.subtitleStyle as { autoPauseVideoOnYomitanPopup?: unknown })
+        .autoPauseVideoOnYomitanPopup !== undefined
+    ) {
+      resolved.subtitleStyle.autoPauseVideoOnYomitanPopup =
+        fallbackSubtitleStyleAutoPauseVideoOnYomitanPopup;
+      warn(
+        'subtitleStyle.autoPauseVideoOnYomitanPopup',
+        (src.subtitleStyle as { autoPauseVideoOnYomitanPopup?: unknown })
+          .autoPauseVideoOnYomitanPopup,
+        resolved.subtitleStyle.autoPauseVideoOnYomitanPopup,
+        'Expected boolean.',
+      );
+    }
+
     const hoverTokenColor = asColor(
       (src.subtitleStyle as { hoverTokenColor?: unknown }).hoverTokenColor,
     );

src/config/resolve/subtitle-style.test.ts

@@ -47,6 +47,25 @@ test('subtitleStyle autoPauseVideoOnHover falls back on invalid value', () => {
   );
 });
 
+test('subtitleStyle autoPauseVideoOnYomitanPopup falls back on invalid value', () => {
+  const { context, warnings } = createResolveContext({
+    subtitleStyle: {
+      autoPauseVideoOnYomitanPopup: 'invalid' as unknown as boolean,
+    },
+  });
+
+  applySubtitleDomainConfig(context);
+
+  assert.equal(context.resolved.subtitleStyle.autoPauseVideoOnYomitanPopup, false);
+  assert.ok(
+    warnings.some(
+      (warning) =>
+        warning.path === 'subtitleStyle.autoPauseVideoOnYomitanPopup' &&
+        warning.message === 'Expected boolean.',
+    ),
+  );
+});
+
 test('subtitleStyle frequencyDictionary.matchMode accepts valid values and warns on invalid', () => {
   const valid = createResolveContext({
     subtitleStyle: {

src/core/services/frequency-dictionary.test.ts

@@ -129,3 +129,39 @@ test('createFrequencyDictionaryLookup parses composite displayValue by primary r
   assert.equal(lookup('鍛える'), 3272);
   assert.equal(lookup('高み'), 9933);
 });
+
+test('createFrequencyDictionaryLookup does not require synchronous fs APIs', async () => {
+  const tempDir = fs.mkdtempSync(path.join(os.tmpdir(), 'subminer-frequency-dict-'));
+  const bankPath = path.join(tempDir, 'term_meta_bank_1.json');
+  fs.writeFileSync(bankPath, JSON.stringify([['猫', 1, { frequency: { displayValue: 42 } }]]));
+
+  const readFileSync = fs.readFileSync;
+  const readdirSync = fs.readdirSync;
+  const statSync = fs.statSync;
+  const existsSync = fs.existsSync;
+  (fs as unknown as Record<string, unknown>).readFileSync = () => {
+    throw new Error('sync read disabled');
+  };
+  (fs as unknown as Record<string, unknown>).readdirSync = () => {
+    throw new Error('sync readdir disabled');
+  };
+  (fs as unknown as Record<string, unknown>).statSync = () => {
+    throw new Error('sync stat disabled');
+  };
+  (fs as unknown as Record<string, unknown>).existsSync = () => {
+    throw new Error('sync exists disabled');
+  };
+
+  try {
+    const lookup = await createFrequencyDictionaryLookup({
+      searchPaths: [tempDir],
+      log: () => undefined,
+    });
+    assert.equal(lookup('猫'), 42);
+  } finally {
+    (fs as unknown as Record<string, unknown>).readFileSync = readFileSync;
+    (fs as unknown as Record<string, unknown>).readdirSync = readdirSync;
+    (fs as unknown as Record<string, unknown>).statSync = statSync;
+    (fs as unknown as Record<string, unknown>).existsSync = existsSync;
+  }
+});

src/core/services/frequency-dictionary.ts

@@ -1,4 +1,4 @@
-import * as fs from 'node:fs';
+import * as fs from 'node:fs/promises';
 import * as path from 'node:path';
 
 export interface FrequencyDictionaryLookupOptions {
@@ -13,6 +13,17 @@ interface FrequencyDictionaryEntry {
 
 const FREQUENCY_BANK_FILE_GLOB = /^term_meta_bank_.*\.json$/;
 const NOOP_LOOKUP = (): null => null;
+const ENTRY_YIELD_INTERVAL = 5000;
+
+function isErrorCode(error: unknown, code: string): boolean {
+  return Boolean(error && typeof error === 'object' && (error as { code?: unknown }).code === code);
+}
+
+async function yieldToEventLoop(): Promise<void> {
+  await new Promise<void>((resolve) => {
+    setImmediate(resolve);
+  });
+}
 
 function normalizeFrequencyTerm(value: string): string {
   return value.trim().toLowerCase();
@@ -93,16 +104,22 @@ function asFrequencyDictionaryEntry(entry: unknown): FrequencyDictionaryEntry |
   };
 }
 
-function addEntriesToMap(
+async function addEntriesToMap(
   rawEntries: unknown,
   terms: Map<string, number>,
-): { duplicateCount: number } {
+): Promise<{ duplicateCount: number }> {
   if (!Array.isArray(rawEntries)) {
     return { duplicateCount: 0 };
   }
 
   let duplicateCount = 0;
+  let processedCount = 0;
   for (const rawEntry of rawEntries) {
+    processedCount += 1;
+    if (processedCount % ENTRY_YIELD_INTERVAL === 0) {
+      await yieldToEventLoop();
+    }
+
     const entry = asFrequencyDictionaryEntry(rawEntry);
     if (!entry) {
       continue;
@@ -119,15 +136,15 @@ function addEntriesToMap(
   return { duplicateCount };
 }
 
-function collectDictionaryFromPath(
+async function collectDictionaryFromPath(
   dictionaryPath: string,
   log: (message: string) => void,
-): Map<string, number> {
+): Promise<Map<string, number>> {
   const terms = new Map<string, number>();
 
   let fileNames: string[];
   try {
-    fileNames = fs.readdirSync(dictionaryPath);
+    fileNames = await fs.readdir(dictionaryPath);
   } catch (error) {
     log(`Failed to read frequency dictionary directory ${dictionaryPath}: ${String(error)}`);
     return terms;
@@ -143,7 +160,7 @@ function collectDictionaryFromPath(
     const bankPath = path.join(dictionaryPath, bankFile);
     let rawText: string;
     try {
-      rawText = fs.readFileSync(bankPath, 'utf-8');
+      rawText = await fs.readFile(bankPath, 'utf-8');
     } catch {
       log(`Failed to read frequency dictionary file ${bankPath}`);
       continue;
@@ -151,6 +168,7 @@ function collectDictionaryFromPath(
 
     let rawEntries: unknown;
     try {
+      await yieldToEventLoop();
       rawEntries = JSON.parse(rawText) as unknown;
     } catch {
       log(`Failed to parse frequency dictionary file as JSON: ${bankPath}`);
@@ -158,7 +176,7 @@ function collectDictionaryFromPath(
     }
 
     const beforeSize = terms.size;
-    const { duplicateCount } = addEntriesToMap(rawEntries, terms);
+    const { duplicateCount } = await addEntriesToMap(rawEntries, terms);
     if (duplicateCount > 0) {
       log(
         `Frequency dictionary ignored ${duplicateCount} duplicate term entr${
@@ -185,11 +203,11 @@ export async function createFrequencyDictionaryLookup(
     let isDirectory = false;
 
     try {
-      if (!fs.existsSync(dictionaryPath)) {
+      isDirectory = (await fs.stat(dictionaryPath)).isDirectory();
+    } catch (error) {
+      if (isErrorCode(error, 'ENOENT')) {
         continue;
       }
-      isDirectory = fs.statSync(dictionaryPath).isDirectory();
-    } catch (error) {
       options.log(
         `Failed to inspect frequency dictionary path ${dictionaryPath}: ${String(error)}`,
       );
@@ -201,7 +219,7 @@ export async function createFrequencyDictionaryLookup(
     }
 
     foundDictionaryPathCount += 1;
-    const terms = collectDictionaryFromPath(dictionaryPath, options.log);
+    const terms = await collectDictionaryFromPath(dictionaryPath, options.log);
     if (terms.size > 0) {
       options.log(`Frequency dictionary loaded from ${dictionaryPath} (${terms.size} entries)`);
       return (term: string): number | null => {

src/core/services/immersion-tracker/maintenance.ts

@@ -46,23 +46,31 @@ export function pruneRetention(
   const dayCutoff = nowMs - policy.dailyRollupRetentionMs;
   const monthCutoff = nowMs - policy.monthlyRollupRetentionMs;
 
-  const deletedSessionEvents = (db
+  const deletedSessionEvents = (
-    .prepare(`DELETE FROM imm_session_events WHERE ts_ms < ?`)
+    db.prepare(`DELETE FROM imm_session_events WHERE ts_ms < ?`).run(eventCutoff) as {
-    .run(eventCutoff) as { changes: number }).changes;
+      changes: number;
-  const deletedTelemetryRows = (db
+    }
-    .prepare(`DELETE FROM imm_session_telemetry WHERE sample_ms < ?`)
+  ).changes;
-    .run(telemetryCutoff) as { changes: number }).changes;
+  const deletedTelemetryRows = (
-  const deletedDailyRows = (db
+    db.prepare(`DELETE FROM imm_session_telemetry WHERE sample_ms < ?`).run(telemetryCutoff) as {
-    .prepare(`DELETE FROM imm_daily_rollups WHERE rollup_day < ?`)
+      changes: number;
-    .run(Math.floor(dayCutoff / DAILY_MS)) as { changes: number }).changes;
+    }
-  const deletedMonthlyRows = (db
+  ).changes;
-    .prepare(`DELETE FROM imm_monthly_rollups WHERE rollup_month < ?`)
+  const deletedDailyRows = (
-    .run(toMonthKey(monthCutoff)) as { changes: number }).changes;
+    db
-  const deletedEndedSessions = (db
+      .prepare(`DELETE FROM imm_daily_rollups WHERE rollup_day < ?`)
-    .prepare(
+      .run(Math.floor(dayCutoff / DAILY_MS)) as { changes: number }
-      `DELETE FROM imm_sessions WHERE ended_at_ms IS NOT NULL AND ended_at_ms < ?`,
+  ).changes;
-    )
+  const deletedMonthlyRows = (
-    .run(telemetryCutoff) as { changes: number }).changes;
+    db
+      .prepare(`DELETE FROM imm_monthly_rollups WHERE rollup_month < ?`)
+      .run(toMonthKey(monthCutoff)) as { changes: number }
+  ).changes;
+  const deletedEndedSessions = (
+    db
+      .prepare(`DELETE FROM imm_sessions WHERE ended_at_ms IS NOT NULL AND ended_at_ms < ?`)
+      .run(telemetryCutoff) as { changes: number }
+  ).changes;
 
   return {
     deletedSessionEvents,

src/core/services/immersion-tracker/reducer.test.ts

@@ -17,6 +17,9 @@ test('extractLineVocabulary returns words and unique kanji', () => {
     new Set(result.words.map((entry) => `${entry.headword}/${entry.word}`)),
     new Set(['hello/hello', '你好/你好', '猫/猫']),
   );
-  assert.equal(result.words.every((entry) => entry.reading === ''), true);
+  assert.equal(
+    result.words.every((entry) => entry.reading === ''),
+    true,
+  );
   assert.deepEqual(new Set(result.kanji), new Set(['你', '好', '猫']));
 });

src/core/services/immersion-tracker/reducer.ts

@@ -97,7 +97,8 @@ export function extractLineVocabulary(value: string): ExtractedLineVocabulary {
   if (!cleaned) return { words: [], kanji: [] };
 
   const wordSet = new Set<string>();
-  const tokenPattern = /[A-Za-z0-9']+|[\u3040-\u30ff]+|[\u3400-\u4dbf\u4e00-\u9fff\u20000-\u2a6df]+/g;
+  const tokenPattern =
+    /[A-Za-z0-9']+|[\u3040-\u30ff]+|[\u3400-\u4dbf\u4e00-\u9fff\u20000-\u2a6df]+/g;
   const rawWords = cleaned.match(tokenPattern) ?? [];
   for (const rawWord of rawWords) {
     const normalizedWord = normalizeText(rawWord.toLowerCase());

src/core/services/immersion-tracker/session.ts

@@ -19,15 +19,8 @@ export function startSessionRecord(
           CREATED_DATE, LAST_UPDATE_DATE
       ) VALUES (?, ?, ?, ?, ?, ?)
     `,
-  )
+    )
-    .run(
+    .run(sessionUuid, videoId, startedAtMs, SESSION_STATUS_ACTIVE, startedAtMs, nowMs);
-      sessionUuid,
-      videoId,
-      startedAtMs,
-      SESSION_STATUS_ACTIVE,
-      startedAtMs,
-      nowMs,
-    );
   const sessionId = Number(result.lastInsertRowid);
   return {
     sessionId,

src/core/services/immersion-tracker/storage-session.test.ts

@@ -59,9 +59,7 @@ testIfSqlite('ensureSchema creates immersion core tables', () => {
     assert.ok(tableNames.has('imm_rollup_state'));
 
     const rollupStateRow = db
-      .prepare(
+      .prepare('SELECT state_value FROM imm_rollup_state WHERE state_key = ?')
-        'SELECT state_value FROM imm_rollup_state WHERE state_key = ?',
-      )
       .get('last_rollup_sample_ms') as {
       state_value: number;
     } | null;
@@ -188,7 +186,9 @@ testIfSqlite('executeQueuedWrite inserts and upserts word and kanji rows', () =>
     stmts.kanjiUpsertStmt.run('日', 8.0, 11.0);
 
     const wordRow = db
-      .prepare('SELECT headword, frequency, first_seen, last_seen FROM imm_words WHERE headword = ?')
+      .prepare(
+        'SELECT headword, frequency, first_seen, last_seen FROM imm_words WHERE headword = ?',
+      )
       .get('猫') as {
       headword: string;
       frequency: number;

src/core/services/immersion-tracker/storage.ts

@@ -426,11 +426,7 @@ export function getOrCreateVideoRecord(
           LAST_UPDATE_DATE = ?
         WHERE video_id = ?
       `,
-    ).run(
+    ).run(details.canonicalTitle || 'unknown', Date.now(), existing.video_id);
-      details.canonicalTitle || 'unknown',
-      Date.now(),
-      existing.video_id,
-    );
     return existing.video_id;
   }
 

src/core/services/immersion-tracker/types.ts

@@ -129,7 +129,11 @@ interface QueuedKanjiWrite {
   lastSeen: number;
 }
 
-export type QueuedWrite = QueuedTelemetryWrite | QueuedEventWrite | QueuedWordWrite | QueuedKanjiWrite;
+export type QueuedWrite =
+  | QueuedTelemetryWrite
+  | QueuedEventWrite
+  | QueuedWordWrite
+  | QueuedKanjiWrite;
 
 export interface VideoMetadata {
   sourceType: number;

src/core/services/index.ts

@@ -10,6 +10,7 @@ export {
   unregisterOverlayShortcutsRuntime,
 } from './overlay-shortcut';
 export { createOverlayShortcutRuntimeHandlers } from './overlay-shortcut-handler';
+export { createShiftSubtitleDelayToAdjacentCueHandler } from './subtitle-delay-shift';
 export { createCliCommandDepsRuntime, handleCliCommand } from './cli-command';
 export {
   copyCurrentSubtitle,

src/core/services/ipc-command.test.ts

@@ -13,6 +13,8 @@ function createOptions(overrides: Partial<Parameters<typeof handleMpvCommandFrom
       RUNTIME_OPTION_CYCLE_PREFIX: '__runtime-option-cycle:',
       REPLAY_SUBTITLE: '__replay-subtitle',
       PLAY_NEXT_SUBTITLE: '__play-next-subtitle',
+      SHIFT_SUB_DELAY_TO_NEXT_SUBTITLE_START: '__sub-delay-next-line',
+      SHIFT_SUB_DELAY_TO_PREVIOUS_SUBTITLE_START: '__sub-delay-prev-line',
     },
     triggerSubsyncFromConfig: () => {
       calls.push('subsync');
@@ -30,6 +32,9 @@ function createOptions(overrides: Partial<Parameters<typeof handleMpvCommandFrom
     mpvPlayNextSubtitle: () => {
       calls.push('next');
     },
+    shiftSubDelayToAdjacentSubtitle: async (direction) => {
+      calls.push(`shift:${direction}`);
+    },
     mpvSendCommand: (command) => {
       sentCommands.push(command);
     },
@@ -68,6 +73,21 @@ test('handleMpvCommandFromIpc emits osd for secondary subtitle track keybinding
   assert.deepEqual(osd, ['Secondary subtitle track: ${secondary-sid}']);
 });
 
+test('handleMpvCommandFromIpc emits osd for subtitle delay keybinding proxies', () => {
+  const { options, sentCommands, osd } = createOptions();
+  handleMpvCommandFromIpc(['add', 'sub-delay', 0.1], options);
+  assert.deepEqual(sentCommands, [['add', 'sub-delay', 0.1]]);
+  assert.deepEqual(osd, ['Subtitle delay: ${sub-delay}']);
+});
+
+test('handleMpvCommandFromIpc dispatches special subtitle-delay shift command', () => {
+  const { options, calls, sentCommands, osd } = createOptions();
+  handleMpvCommandFromIpc(['__sub-delay-next-line'], options);
+  assert.deepEqual(calls, ['shift:next']);
+  assert.deepEqual(sentCommands, []);
+  assert.deepEqual(osd, []);
+});
+
 test('handleMpvCommandFromIpc does not forward commands while disconnected', () => {
   const { options, sentCommands, osd } = createOptions({
     isMpvConnected: () => false,

src/core/services/ipc-command.ts

@@ -12,6 +12,8 @@ export interface HandleMpvCommandFromIpcOptions {
     RUNTIME_OPTION_CYCLE_PREFIX: string;
     REPLAY_SUBTITLE: string;
     PLAY_NEXT_SUBTITLE: string;
+    SHIFT_SUB_DELAY_TO_NEXT_SUBTITLE_START: string;
+    SHIFT_SUB_DELAY_TO_PREVIOUS_SUBTITLE_START: string;
   };
   triggerSubsyncFromConfig: () => void;
   openRuntimeOptionsPalette: () => void;
@@ -19,6 +21,7 @@ export interface HandleMpvCommandFromIpcOptions {
   showMpvOsd: (text: string) => void;
   mpvReplaySubtitle: () => void;
   mpvPlayNextSubtitle: () => void;
+  shiftSubDelayToAdjacentSubtitle: (direction: 'next' | 'previous') => Promise<void>;
   mpvSendCommand: (command: (string | number)[]) => void;
   isMpvConnected: () => boolean;
   hasRuntimeOptionsManager: () => boolean;
@@ -46,6 +49,9 @@ function resolveProxyCommandOsd(command: (string | number)[]): string | null {
   if (property === 'secondary-sid') {
     return 'Secondary subtitle track: ${secondary-sid}';
   }
+  if (property === 'sub-delay') {
+    return 'Subtitle delay: ${sub-delay}';
+  }
   return null;
 }
 
@@ -64,6 +70,20 @@ export function handleMpvCommandFromIpc(
     return;
   }
 
+  if (
+    first === options.specialCommands.SHIFT_SUB_DELAY_TO_NEXT_SUBTITLE_START ||
+    first === options.specialCommands.SHIFT_SUB_DELAY_TO_PREVIOUS_SUBTITLE_START
+  ) {
+    const direction =
+      first === options.specialCommands.SHIFT_SUB_DELAY_TO_NEXT_SUBTITLE_START
+        ? 'next'
+        : 'previous';
+    options.shiftSubDelayToAdjacentSubtitle(direction).catch((error) => {
+      options.showMpvOsd(`Subtitle delay shift failed: ${(error as Error).message}`);
+    });
+    return;
+  }
+
   if (first.startsWith(options.specialCommands.RUNTIME_OPTION_CYCLE_PREFIX)) {
     if (!options.hasRuntimeOptionsManager()) return;
     const [, idToken, directionToken] = first.split(':');

src/core/services/jlpt-vocab.test.ts

@@ -0,0 +1,75 @@
+import assert from 'node:assert/strict';
+import fs from 'node:fs';
+import os from 'node:os';
+import path from 'node:path';
+import test from 'node:test';
+
+import { createJlptVocabularyLookup } from './jlpt-vocab';
+
+test('createJlptVocabularyLookup loads JLPT bank entries and resolves known levels', async () => {
+  const logs: string[] = [];
+  const tempDir = fs.mkdtempSync(path.join(os.tmpdir(), 'subminer-jlpt-dict-'));
+  fs.writeFileSync(
+    path.join(tempDir, 'term_meta_bank_5.json'),
+    JSON.stringify([
+      ['猫', 1, { frequency: { displayValue: 1 } }],
+      ['犬', 2, { frequency: { displayValue: 2 } }],
+    ]),
+  );
+  fs.writeFileSync(path.join(tempDir, 'term_meta_bank_1.json'), JSON.stringify([]));
+  fs.writeFileSync(path.join(tempDir, 'term_meta_bank_2.json'), JSON.stringify([]));
+  fs.writeFileSync(path.join(tempDir, 'term_meta_bank_3.json'), JSON.stringify([]));
+  fs.writeFileSync(path.join(tempDir, 'term_meta_bank_4.json'), JSON.stringify([]));
+
+  const lookup = await createJlptVocabularyLookup({
+    searchPaths: [tempDir],
+    log: (message) => {
+      logs.push(message);
+    },
+  });
+
+  assert.equal(lookup('猫'), 'N5');
+  assert.equal(lookup('犬'), 'N5');
+  assert.equal(lookup('鳥'), null);
+  assert.equal(
+    logs.some((entry) => entry.includes('JLPT dictionary loaded from')),
+    true,
+  );
+});
+
+test('createJlptVocabularyLookup does not require synchronous fs APIs', async () => {
+  const tempDir = fs.mkdtempSync(path.join(os.tmpdir(), 'subminer-jlpt-dict-'));
+  fs.writeFileSync(
+    path.join(tempDir, 'term_meta_bank_4.json'),
+    JSON.stringify([['見る', 1, { frequency: { displayValue: 3 } }]]),
+  );
+  fs.writeFileSync(path.join(tempDir, 'term_meta_bank_1.json'), JSON.stringify([]));
+  fs.writeFileSync(path.join(tempDir, 'term_meta_bank_2.json'), JSON.stringify([]));
+  fs.writeFileSync(path.join(tempDir, 'term_meta_bank_3.json'), JSON.stringify([]));
+  fs.writeFileSync(path.join(tempDir, 'term_meta_bank_5.json'), JSON.stringify([]));
+
+  const readFileSync = fs.readFileSync;
+  const statSync = fs.statSync;
+  const existsSync = fs.existsSync;
+  (fs as unknown as Record<string, unknown>).readFileSync = () => {
+    throw new Error('sync read disabled');
+  };
+  (fs as unknown as Record<string, unknown>).statSync = () => {
+    throw new Error('sync stat disabled');
+  };
+  (fs as unknown as Record<string, unknown>).existsSync = () => {
+    throw new Error('sync exists disabled');
+  };
+
+  try {
+    const lookup = await createJlptVocabularyLookup({
+      searchPaths: [tempDir],
+      log: () => undefined,
+    });
+    assert.equal(lookup('見る'), 'N4');
+  } finally {
+    (fs as unknown as Record<string, unknown>).readFileSync = readFileSync;
+    (fs as unknown as Record<string, unknown>).statSync = statSync;
+    (fs as unknown as Record<string, unknown>).existsSync = existsSync;
+  }
+});

src/core/services/jlpt-vocab.ts

@@ -1,4 +1,4 @@
-import * as fs from 'fs';
+import * as fs from 'node:fs/promises';
 import * as path from 'path';
 
 import type { JlptLevel } from '../../types';
@@ -24,6 +24,17 @@ const JLPT_LEVEL_PRECEDENCE: Record<JlptLevel, number> = {
 };
 
 const NOOP_LOOKUP = (): null => null;
+const ENTRY_YIELD_INTERVAL = 5000;
+
+function isErrorCode(error: unknown, code: string): boolean {
+  return Boolean(error && typeof error === 'object' && (error as { code?: unknown }).code === code);
+}
+
+async function yieldToEventLoop(): Promise<void> {
+  await new Promise<void>((resolve) => {
+    setImmediate(resolve);
+  });
+}
 
 function normalizeJlptTerm(value: string): string {
   return value.trim();
@@ -36,12 +47,12 @@ function hasFrequencyDisplayValue(meta: unknown): boolean {
   return Object.prototype.hasOwnProperty.call(frequency as Record<string, unknown>, 'displayValue');
 }
 
-function addEntriesToMap(
+async function addEntriesToMap(
   rawEntries: unknown,
   level: JlptLevel,
   terms: Map<string, JlptLevel>,
   log: (message: string) => void,
-): void {
+): Promise<void> {
   const shouldUpdateLevel = (
     existingLevel: JlptLevel | undefined,
     incomingLevel: JlptLevel,
@@ -53,7 +64,13 @@ function addEntriesToMap(
     return;
   }
 
+  let processedCount = 0;
   for (const rawEntry of rawEntries) {
+    processedCount += 1;
+    if (processedCount % ENTRY_YIELD_INTERVAL === 0) {
+      await yieldToEventLoop();
+    }
+
     if (!Array.isArray(rawEntry)) {
       continue;
     }
@@ -84,22 +101,31 @@ function addEntriesToMap(
   }
 }
 
-function collectDictionaryFromPath(
+async function collectDictionaryFromPath(
   dictionaryPath: string,
   log: (message: string) => void,
-): Map<string, JlptLevel> {
+): Promise<Map<string, JlptLevel>> {
   const terms = new Map<string, JlptLevel>();
 
   for (const bank of JLPT_BANK_FILES) {
     const bankPath = path.join(dictionaryPath, bank.filename);
-    if (!fs.existsSync(bankPath)) {
+    try {
-      log(`JLPT bank file missing for ${bank.level}: ${bankPath}`);
+      if (!(await fs.stat(bankPath)).isFile()) {
+        log(`JLPT bank file missing for ${bank.level}: ${bankPath}`);
+        continue;
+      }
+    } catch (error) {
+      if (isErrorCode(error, 'ENOENT')) {
+        log(`JLPT bank file missing for ${bank.level}: ${bankPath}`);
+        continue;
+      }
+      log(`Failed to inspect JLPT bank file ${bankPath}: ${String(error)}`);
       continue;
     }
 
     let rawText: string;
     try {
-      rawText = fs.readFileSync(bankPath, 'utf-8');
+      rawText = await fs.readFile(bankPath, 'utf-8');
     } catch {
       log(`Failed to read JLPT bank file ${bankPath}`);
       continue;
@@ -107,6 +133,7 @@ function collectDictionaryFromPath(
 
     let rawEntries: unknown;
     try {
+      await yieldToEventLoop();
       rawEntries = JSON.parse(rawText) as unknown;
     } catch {
       log(`Failed to parse JLPT bank file as JSON: ${bankPath}`);
@@ -119,7 +146,7 @@ function collectDictionaryFromPath(
     }
 
     const beforeSize = terms.size;
-    addEntriesToMap(rawEntries, bank.level, terms, log);
+    await addEntriesToMap(rawEntries, bank.level, terms, log);
     if (terms.size === beforeSize) {
       log(`JLPT bank file contained no extractable entries: ${bankPath}`);
     }
@@ -137,17 +164,21 @@ export async function createJlptVocabularyLookup(
   const resolvedBanks: string[] = [];
   for (const dictionaryPath of options.searchPaths) {
     attemptedPaths.push(dictionaryPath);
-    if (!fs.existsSync(dictionaryPath)) {
+    let isDirectory = false;
-      continue;
+    try {
-    }
+      isDirectory = (await fs.stat(dictionaryPath)).isDirectory();
-
+    } catch (error) {
-    if (!fs.statSync(dictionaryPath).isDirectory()) {
+      if (isErrorCode(error, 'ENOENT')) {
+        continue;
+      }
+      options.log(`Failed to inspect JLPT dictionary path ${dictionaryPath}: ${String(error)}`);
       continue;
     }
+    if (!isDirectory) continue;
 
     foundDictionaryPathCount += 1;
 
-    const terms = collectDictionaryFromPath(dictionaryPath, options.log);
+    const terms = await collectDictionaryFromPath(dictionaryPath, options.log);
     if (terms.size > 0) {
       resolvedBanks.push(dictionaryPath);
       foundBankCount += 1;

src/core/services/overlay-window.ts

@@ -2,6 +2,7 @@ import { BrowserWindow } from 'electron';
 import * as path from 'path';
 import { WindowGeometry } from '../../types';
 import { createLogger } from '../../logger';
+import { IPC_CHANNELS } from '../../shared/ipc/contracts';
 
 const logger = createLogger('main:overlay-window');
 const overlayWindowLayerByInstance = new WeakMap<BrowserWindow, OverlayWindowKind>();
@@ -24,6 +25,24 @@ function loadOverlayWindowLayer(window: BrowserWindow, layer: OverlayWindowKind)
 
 export type OverlayWindowKind = 'visible' | 'modal';
 
+function isLookupWindowToggleInput(input: Electron.Input): boolean {
+  if (input.type !== 'keyDown') return false;
+  if (input.alt) return false;
+  if (!input.control && !input.meta) return false;
+  if (input.shift) return false;
+  const normalizedKey = typeof input.key === 'string' ? input.key.toLowerCase() : '';
+  return input.code === 'KeyY' || normalizedKey === 'y';
+}
+
+function isKeyboardModeToggleInput(input: Electron.Input): boolean {
+  if (input.type !== 'keyDown') return false;
+  if (input.alt) return false;
+  if (!input.control && !input.meta) return false;
+  if (!input.shift) return false;
+  const normalizedKey = typeof input.key === 'string' ? input.key.toLowerCase() : '';
+  return input.code === 'KeyY' || normalizedKey === 'y';
+}
+
 export function updateOverlayWindowBounds(
   geometry: WindowGeometry,
   window: BrowserWindow | null,
@@ -118,6 +137,16 @@ export function createOverlayWindow(
   window.webContents.on('before-input-event', (event, input) => {
     if (kind === 'modal') return;
     if (!window.isVisible()) return;
+    if (isKeyboardModeToggleInput(input)) {
+      event.preventDefault();
+      window.webContents.send(IPC_CHANNELS.event.keyboardModeToggleRequested);
+      return;
+    }
+    if (isLookupWindowToggleInput(input)) {
+      event.preventDefault();
+      window.webContents.send(IPC_CHANNELS.event.lookupWindowToggleRequested);
+      return;
+    }
     if (!options.tryHandleOverlayShortcutLocalFallback(input)) return;
     event.preventDefault();
   });

src/core/services/subsync.test.ts

@@ -209,10 +209,73 @@ test('runSubsyncManual constructs ffsubsync command and returns success', async
   assert.ok(ffArgs.includes(primaryPath));
   assert.ok(ffArgs.includes('--reference-stream'));
   assert.ok(ffArgs.includes('0:2'));
+  const ffOutputFlagIndex = ffArgs.indexOf('-o');
+  assert.equal(ffOutputFlagIndex >= 0, true);
+  assert.equal(ffArgs[ffOutputFlagIndex + 1], primaryPath);
   assert.equal(sentCommands[0]?.[0], 'sub_add');
   assert.deepEqual(sentCommands[1], ['set_property', 'sub-delay', 0]);
 });
 
+test('runSubsyncManual writes deterministic _retimed filename when replace is false', async () => {
+  const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'subsync-ffsubsync-no-replace-'));
+  const ffsubsyncLogPath = path.join(tmpDir, 'ffsubsync-args.log');
+  const ffsubsyncPath = path.join(tmpDir, 'ffsubsync.sh');
+  const ffmpegPath = path.join(tmpDir, 'ffmpeg.sh');
+  const alassPath = path.join(tmpDir, 'alass.sh');
+  const videoPath = path.join(tmpDir, 'video.mkv');
+  const primaryPath = path.join(tmpDir, 'episode.ja.srt');
+
+  fs.writeFileSync(videoPath, 'video');
+  fs.writeFileSync(primaryPath, 'sub');
+  writeExecutableScript(ffmpegPath, '#!/bin/sh\nexit 0\n');
+  writeExecutableScript(alassPath, '#!/bin/sh\nexit 0\n');
+  writeExecutableScript(
+    ffsubsyncPath,
+    `#!/bin/sh\n: > "${ffsubsyncLogPath}"\nfor arg in "$@"; do printf '%s\\n' "$arg" >> "${ffsubsyncLogPath}"; done\nout=\"\"\nprev=\"\"\nfor arg in \"$@\"; do\n  if [ \"$prev\" = \"-o\" ]; then out=\"$arg\"; fi\n  prev=\"$arg\"\ndone\nif [ -n \"$out\" ]; then : > \"$out\"; fi\nexit 0\n`,
+  );
+
+  const deps = makeDeps({
+    getMpvClient: () => ({
+      connected: true,
+      currentAudioStreamIndex: null,
+      send: () => {},
+      requestProperty: async (name: string) => {
+        if (name === 'path') return videoPath;
+        if (name === 'sid') return 1;
+        if (name === 'secondary-sid') return null;
+        if (name === 'track-list') {
+          return [
+            {
+              id: 1,
+              type: 'sub',
+              selected: true,
+              external: true,
+              'external-filename': primaryPath,
+            },
+          ];
+        }
+        return null;
+      },
+    }),
+    getResolvedConfig: () => ({
+      defaultMode: 'manual',
+      alassPath,
+      ffsubsyncPath,
+      ffmpegPath,
+      replace: false,
+    }),
+  });
+
+  const result = await runSubsyncManual({ engine: 'ffsubsync', sourceTrackId: null }, deps);
+
+  assert.equal(result.ok, true);
+  const ffArgs = fs.readFileSync(ffsubsyncLogPath, 'utf8').trim().split('\n');
+  const ffOutputFlagIndex = ffArgs.indexOf('-o');
+  assert.equal(ffOutputFlagIndex >= 0, true);
+  const outputPath = ffArgs[ffOutputFlagIndex + 1];
+  assert.equal(outputPath, path.join(tmpDir, 'episode.ja_retimed.srt'));
+});
+
 test('runSubsyncManual constructs alass command and returns failure on non-zero exit', async () => {
   const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'subsync-alass-'));
   const alassLogPath = path.join(tmpDir, 'alass-args.log');
@@ -281,6 +344,76 @@ test('runSubsyncManual constructs alass command and returns failure on non-zero
   assert.equal(alassArgs[1], primaryPath);
 });
 
+test('runSubsyncManual keeps internal alass source file alive until sync finishes', async () => {
+  const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'subsync-alass-internal-source-'));
+  const alassPath = path.join(tmpDir, 'alass.sh');
+  const ffmpegPath = path.join(tmpDir, 'ffmpeg.sh');
+  const ffsubsyncPath = path.join(tmpDir, 'ffsubsync.sh');
+  const videoPath = path.join(tmpDir, 'video.mkv');
+  const primaryPath = path.join(tmpDir, 'primary.srt');
+
+  fs.writeFileSync(videoPath, 'video');
+  fs.writeFileSync(primaryPath, 'sub');
+  writeExecutableScript(ffsubsyncPath, '#!/bin/sh\nexit 0\n');
+  writeExecutableScript(
+    ffmpegPath,
+    '#!/bin/sh\nout=""\nfor arg in "$@"; do out="$arg"; done\nif [ -n "$out" ]; then : > "$out"; fi\nexit 0\n',
+  );
+  writeExecutableScript(
+    alassPath,
+    '#!/bin/sh\nsleep 0.2\nif [ ! -f "$1" ]; then echo "missing reference subtitle" >&2; exit 1; fi\nif [ ! -f "$2" ]; then echo "missing input subtitle" >&2; exit 1; fi\n: > "$3"\nexit 0\n',
+  );
+
+  const sentCommands: Array<Array<string | number>> = [];
+  const deps = makeDeps({
+    getMpvClient: () => ({
+      connected: true,
+      currentAudioStreamIndex: null,
+      send: (payload) => {
+        sentCommands.push(payload.command);
+      },
+      requestProperty: async (name: string) => {
+        if (name === 'path') return videoPath;
+        if (name === 'sid') return 1;
+        if (name === 'secondary-sid') return null;
+        if (name === 'track-list') {
+          return [
+            {
+              id: 1,
+              type: 'sub',
+              selected: true,
+              external: true,
+              'external-filename': primaryPath,
+            },
+            {
+              id: 2,
+              type: 'sub',
+              selected: false,
+              external: false,
+              'ff-index': 2,
+              codec: 'ass',
+            },
+          ];
+        }
+        return null;
+      },
+    }),
+    getResolvedConfig: () => ({
+      defaultMode: 'manual',
+      alassPath,
+      ffsubsyncPath,
+      ffmpegPath,
+    }),
+  });
+
+  const result = await runSubsyncManual({ engine: 'alass', sourceTrackId: 2 }, deps);
+
+  assert.equal(result.ok, true);
+  assert.equal(result.message, 'Subtitle synchronized with alass');
+  assert.equal(sentCommands[0]?.[0], 'sub_add');
+  assert.deepEqual(sentCommands[1], ['set_property', 'sub-delay', 0]);
+});
+
 test('runSubsyncManual resolves string sid values from mpv stream properties', async () => {
   const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'subsync-stream-sid-'));
   const ffsubsyncPath = path.join(tmpDir, 'ffsubsync.sh');

src/core/services/subsync.ts

@@ -215,10 +215,10 @@ function cleanupTemporaryFile(extraction: FileExtractionResult): void {
   } catch {}
 }
 
-function buildRetimedPath(subPath: string): string {
+function buildRetimedPath(subPath: string, replace: boolean): string {
+  if (replace) return subPath;
   const parsed = path.parse(subPath);
-  const suffix = `_retimed_${Date.now()}`;
+  return path.join(parsed.dir, `${parsed.name}_retimed${parsed.ext || '.srt'}`);
-  return path.join(parsed.dir, `${parsed.name}${suffix}${parsed.ext || '.srt'}`);
 }
 
 async function runAlassSync(
@@ -265,7 +265,8 @@ async function subsyncToReference(
     context.videoPath,
     context.primaryTrack,
   );
-  const outputPath = buildRetimedPath(primaryExtraction.path);
+  const replacePrimary = resolved.replace !== false && !primaryExtraction.temporary;
+  const outputPath = buildRetimedPath(primaryExtraction.path, replacePrimary);
 
   try {
     let result: CommandResult;
@@ -389,7 +390,7 @@ export async function runSubsyncManual(
   let sourceExtraction: FileExtractionResult | null = null;
   try {
     sourceExtraction = await extractSubtitleTrackToFile(ffmpegPath, context.videoPath, sourceTrack);
-    return subsyncToReference('alass', sourceExtraction.path, context, resolved, client);
+    return await subsyncToReference('alass', sourceExtraction.path, context, resolved, client);
   } finally {
     if (sourceExtraction) {
       cleanupTemporaryFile(sourceExtraction);

src/core/services/subtitle-delay-shift.test.ts

@@ -0,0 +1,122 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { createShiftSubtitleDelayToAdjacentCueHandler } from './subtitle-delay-shift';
+
+function createMpvClient(props: Record<string, unknown>) {
+  return {
+    connected: true,
+    requestProperty: async (name: string) => props[name],
+  };
+}
+
+test('shift subtitle delay to next cue using active external srt track', async () => {
+  const commands: Array<Array<string | number>> = [];
+  const osd: string[] = [];
+  let loadCount = 0;
+  const handler = createShiftSubtitleDelayToAdjacentCueHandler({
+    getMpvClient: () =>
+      createMpvClient({
+        'track-list': [
+          {
+            type: 'sub',
+            id: 2,
+            external: true,
+            'external-filename': '/tmp/subs.srt',
+          },
+        ],
+        sid: 2,
+        'sub-start': 3.0,
+      }),
+    loadSubtitleSourceText: async () => {
+      loadCount += 1;
+      return `1
+00:00:01,000 --> 00:00:02,000
+line-1
+
+2
+00:00:03,000 --> 00:00:04,000
+line-2
+
+3
+00:00:05,000 --> 00:00:06,000
+line-3`;
+    },
+    sendMpvCommand: (command) => commands.push(command),
+    showMpvOsd: (text) => osd.push(text),
+  });
+
+  await handler('next');
+  await handler('next');
+
+  assert.equal(loadCount, 1);
+  assert.equal(commands.length, 2);
+  const delta = commands[0]?.[2];
+  assert.equal(commands[0]?.[0], 'add');
+  assert.equal(commands[0]?.[1], 'sub-delay');
+  assert.equal(typeof delta, 'number');
+  assert.equal(Math.abs((delta as number) - 2) < 0.0001, true);
+  assert.deepEqual(osd, ['Subtitle delay: ${sub-delay}', 'Subtitle delay: ${sub-delay}']);
+});
+
+test('shift subtitle delay to previous cue using active external ass track', async () => {
+  const commands: Array<Array<string | number>> = [];
+  const handler = createShiftSubtitleDelayToAdjacentCueHandler({
+    getMpvClient: () =>
+      createMpvClient({
+        'track-list': [
+          {
+            type: 'sub',
+            id: 4,
+            external: true,
+            'external-filename': '/tmp/subs.ass',
+          },
+        ],
+        sid: 4,
+        'sub-start': 2.0,
+      }),
+    loadSubtitleSourceText: async () => `[Events]
+Dialogue: 0,0:00:00.50,0:00:01.50,Default,,0,0,0,,line-1
+Dialogue: 0,0:00:02.00,0:00:03.00,Default,,0,0,0,,line-2
+Dialogue: 0,0:00:04.00,0:00:05.00,Default,,0,0,0,,line-3`,
+    sendMpvCommand: (command) => commands.push(command),
+    showMpvOsd: () => {},
+  });
+
+  await handler('previous');
+
+  const delta = commands[0]?.[2];
+  assert.equal(typeof delta, 'number');
+  assert.equal(Math.abs((delta as number) + 1.5) < 0.0001, true);
+});
+
+test('shift subtitle delay throws when no next cue exists', async () => {
+  const handler = createShiftSubtitleDelayToAdjacentCueHandler({
+    getMpvClient: () =>
+      createMpvClient({
+        'track-list': [
+          {
+            type: 'sub',
+            id: 1,
+            external: true,
+            'external-filename': '/tmp/subs.vtt',
+          },
+        ],
+        sid: 1,
+        'sub-start': 5.0,
+      }),
+    loadSubtitleSourceText: async () => `WEBVTT
+
+00:00:01.000 --> 00:00:02.000
+line-1
+
+00:00:03.000 --> 00:00:04.000
+line-2
+
+00:00:05.000 --> 00:00:06.000
+line-3`,
+    sendMpvCommand: () => {},
+    showMpvOsd: () => {},
+  });
+
+  await assert.rejects(() => handler('next'), /No next subtitle cue found/);
+});

src/core/services/subtitle-delay-shift.ts

@@ -0,0 +1,203 @@
+type SubtitleDelayShiftDirection = 'next' | 'previous';
+
+type MpvClientLike = {
+  connected: boolean;
+  requestProperty: (name: string) => Promise<unknown>;
+};
+
+type MpvSubtitleTrackLike = {
+  type?: unknown;
+  id?: unknown;
+  external?: unknown;
+  'external-filename'?: unknown;
+};
+
+type SubtitleCueCacheEntry = {
+  starts: number[];
+};
+
+type SubtitleDelayShiftDeps = {
+  getMpvClient: () => MpvClientLike | null;
+  loadSubtitleSourceText: (source: string) => Promise<string>;
+  sendMpvCommand: (command: Array<string | number>) => void;
+  showMpvOsd: (text: string) => void;
+};
+
+function asTrackId(value: unknown): number | null {
+  if (typeof value === 'number' && Number.isInteger(value)) return value;
+  if (typeof value === 'string') {
+    const parsed = Number(value.trim());
+    if (Number.isInteger(parsed)) return parsed;
+  }
+  return null;
+}
+
+function parseSrtOrVttStartTimes(content: string): number[] {
+  const starts: number[] = [];
+  const lines = content.split(/\r?\n/);
+  for (const line of lines) {
+    const match = line.match(
+      /^\s*(?:(\d{1,2}):)?(\d{2}):(\d{2})[,.](\d{1,3})\s*-->\s*(?:(\d{1,2}):)?(\d{2}):(\d{2})[,.](\d{1,3})/,
+    );
+    if (!match) continue;
+    const hours = Number(match[1] || 0);
+    const minutes = Number(match[2] || 0);
+    const seconds = Number(match[3] || 0);
+    const millis = Number(String(match[4]).padEnd(3, '0'));
+    starts.push(hours * 3600 + minutes * 60 + seconds + millis / 1000);
+  }
+  return starts;
+}
+
+function parseAssStartTimes(content: string): number[] {
+  const starts: number[] = [];
+  const lines = content.split(/\r?\n/);
+  for (const line of lines) {
+    const match = line.match(
+      /^Dialogue:[^,]*,(\d+:\d{2}:\d{2}\.\d{1,2}),\d+:\d{2}:\d{2}\.\d{1,2},/,
+    );
+    if (!match) continue;
+    const [hoursRaw, minutesRaw, secondsRaw] = match[1]!.split(':');
+    if (secondsRaw === undefined) continue;
+    const [wholeSecondsRaw, fractionRaw = '0'] = secondsRaw.split('.');
+    const hours = Number(hoursRaw);
+    const minutes = Number(minutesRaw);
+    const wholeSeconds = Number(wholeSecondsRaw);
+    const fraction = Number(`0.${fractionRaw}`);
+    starts.push(hours * 3600 + minutes * 60 + wholeSeconds + fraction);
+  }
+  return starts;
+}
+
+function normalizeCueStarts(starts: number[]): number[] {
+  const sorted = starts
+    .filter((value) => Number.isFinite(value) && value >= 0)
+    .sort((a, b) => a - b);
+  if (sorted.length === 0) return [];
+
+  const deduped: number[] = [sorted[0]!];
+  for (let i = 1; i < sorted.length; i += 1) {
+    const current = sorted[i]!;
+    const previous = deduped[deduped.length - 1]!;
+    if (Math.abs(current - previous) > 0.0005) {
+      deduped.push(current);
+    }
+  }
+  return deduped;
+}
+
+function parseCueStarts(content: string, source: string): number[] {
+  const normalizedSource = source.toLowerCase().split('?')[0] || '';
+  const parseSrtLike = () => parseSrtOrVttStartTimes(content);
+  const parseAssLike = () => parseAssStartTimes(content);
+
+  let starts: number[] = [];
+  if (normalizedSource.endsWith('.ass') || normalizedSource.endsWith('.ssa')) {
+    starts = parseAssLike();
+    if (starts.length === 0) {
+      starts = parseSrtLike();
+    }
+  } else {
+    starts = parseSrtLike();
+    if (starts.length === 0) {
+      starts = parseAssLike();
+    }
+  }
+
+  const normalized = normalizeCueStarts(starts);
+  if (normalized.length === 0) {
+    throw new Error('Could not parse subtitle cue timings from active subtitle source.');
+  }
+  return normalized;
+}
+
+function getActiveSubtitleSource(trackListRaw: unknown, sidRaw: unknown): string {
+  const sid = asTrackId(sidRaw);
+  if (sid === null) {
+    throw new Error('No active subtitle track selected.');
+  }
+  if (!Array.isArray(trackListRaw)) {
+    throw new Error('Could not inspect subtitle track list.');
+  }
+
+  const activeTrack = trackListRaw.find((entry): entry is MpvSubtitleTrackLike => {
+    if (!entry || typeof entry !== 'object') return false;
+    const track = entry as MpvSubtitleTrackLike;
+    return track.type === 'sub' && asTrackId(track.id) === sid;
+  });
+
+  if (!activeTrack) {
+    throw new Error('No active subtitle track found in mpv track list.');
+  }
+  if (activeTrack.external !== true) {
+    throw new Error('Active subtitle track is internal and has no direct subtitle file source.');
+  }
+
+  const source =
+    typeof activeTrack['external-filename'] === 'string'
+      ? activeTrack['external-filename'].trim()
+      : '';
+  if (!source) {
+    throw new Error('Active subtitle track has no external subtitle source path.');
+  }
+  return source;
+}
+
+function findAdjacentCueStart(
+  starts: number[],
+  currentStart: number,
+  direction: SubtitleDelayShiftDirection,
+): number {
+  const epsilon = 0.0005;
+  if (direction === 'next') {
+    const target = starts.find((value) => value > currentStart + epsilon);
+    if (target === undefined) {
+      throw new Error('No next subtitle cue found for active subtitle source.');
+    }
+    return target;
+  }
+
+  for (let index = starts.length - 1; index >= 0; index -= 1) {
+    const value = starts[index]!;
+    if (value < currentStart - epsilon) {
+      return value;
+    }
+  }
+  throw new Error('No previous subtitle cue found for active subtitle source.');
+}
+
+export function createShiftSubtitleDelayToAdjacentCueHandler(deps: SubtitleDelayShiftDeps) {
+  const cueCache = new Map<string, SubtitleCueCacheEntry>();
+
+  return async (direction: SubtitleDelayShiftDirection): Promise<void> => {
+    const client = deps.getMpvClient();
+    if (!client || !client.connected) {
+      throw new Error('MPV not connected.');
+    }
+
+    const [trackListRaw, sidRaw, subStartRaw] = await Promise.all([
+      client.requestProperty('track-list'),
+      client.requestProperty('sid'),
+      client.requestProperty('sub-start'),
+    ]);
+
+    const currentStart =
+      typeof subStartRaw === 'number' && Number.isFinite(subStartRaw) ? subStartRaw : null;
+    if (currentStart === null) {
+      throw new Error('Current subtitle start time is unavailable.');
+    }
+
+    const source = getActiveSubtitleSource(trackListRaw, sidRaw);
+    let cueStarts = cueCache.get(source)?.starts;
+    if (!cueStarts) {
+      const content = await deps.loadSubtitleSourceText(source);
+      cueStarts = parseCueStarts(content, source);
+      cueCache.set(source, { starts: cueStarts });
+    }
+
+    const targetStart = findAdjacentCueStart(cueStarts, currentStart, direction);
+    const delta = targetStart - currentStart;
+    deps.sendMpvCommand(['add', 'sub-delay', delta]);
+    deps.showMpvOsd('Subtitle delay: ${sub-delay}');
+  };
+}

src/core/services/tokenizer.test.ts

@@ -297,6 +297,60 @@ test('tokenizeSubtitle starts Yomitan frequency lookup and MeCab enrichment in p
   assert.equal(result.tokens?.[0]?.frequencyRank, 77);
 });
 
+test('tokenizeSubtitle can signal tokenization-ready before enrichment completes', async () => {
+  const frequencyDeferred = createDeferred<unknown[]>();
+  const mecabDeferred = createDeferred<null>();
+  let tokenizationReadyText: string | null = null;
+
+  const pendingResult = tokenizeSubtitle(
+    '猫',
+    makeDeps({
+      onTokenizationReady: (text) => {
+        tokenizationReadyText = text;
+      },
+      getFrequencyDictionaryEnabled: () => true,
+      getYomitanExt: () => ({ id: 'dummy-ext' }) as any,
+      getYomitanParserWindow: () =>
+        ({
+          isDestroyed: () => false,
+          webContents: {
+            executeJavaScript: async (script: string) => {
+              if (script.includes('getTermFrequencies')) {
+                return await frequencyDeferred.promise;
+              }
+
+              return [
+                {
+                  source: 'scanning-parser',
+                  index: 0,
+                  content: [
+                    [
+                      {
+                        text: '猫',
+                        reading: 'ねこ',
+                        headwords: [[{ term: '猫' }]],
+                      },
+                    ],
+                  ],
+                },
+              ];
+            },
+          },
+        }) as unknown as Electron.BrowserWindow,
+      tokenizeWithMecab: async () => {
+        return await mecabDeferred.promise;
+      },
+    }),
+  );
+
+  await new Promise((resolve) => setTimeout(resolve, 0));
+  assert.equal(tokenizationReadyText, '猫');
+
+  frequencyDeferred.resolve([]);
+  mecabDeferred.resolve(null);
+  await pendingResult;
+});
+
 test('tokenizeSubtitle appends trailing kana to merged Yomitan readings when headword equals surface', async () => {
   const result = await tokenizeSubtitle(
     '断じて見ていない',
@@ -346,6 +400,11 @@ test('tokenizeSubtitle queries headword frequencies with token reading for disam
           webContents: {
             executeJavaScript: async (script: string) => {
               if (script.includes('getTermFrequencies')) {
+                assert.equal(
+                  script.includes('"term":"鍛える","reading":null'),
+                  false,
+                  'should not eagerly include term-only fallback pair when reading lookup is present',
+                );
                 if (!script.includes('"term":"鍛える","reading":"きた"')) {
                   return [];
                 }
@@ -913,6 +972,34 @@ test('tokenizeSubtitle skips frequency rank when Yomitan token is enriched as pa
   assert.equal(result.tokens?.[0]?.frequencyRank, undefined);
 });
 
+test('tokenizeSubtitle keeps frequency rank when mecab tags classify token as content-bearing', async () => {
+  const result = await tokenizeSubtitle(
+    'ふふ',
+    makeDepsFromYomitanTokens([{ surface: 'ふふ', reading: '', headword: 'ふふ' }], {
+      getFrequencyDictionaryEnabled: () => true,
+      getFrequencyRank: (text) => (text === 'ふふ' ? 3014 : null),
+      tokenizeWithMecab: async () => [
+        {
+          headword: 'ふふ',
+          surface: 'ふふ',
+          reading: 'フフ',
+          startPos: 0,
+          endPos: 2,
+          partOfSpeech: PartOfSpeech.verb,
+          pos1: '動詞',
+          pos2: '自立',
+          isMerged: false,
+          isKnown: false,
+          isNPlusOneTarget: false,
+        },
+      ],
+    }),
+  );
+
+  assert.equal(result.tokens?.length, 1);
+  assert.equal(result.tokens?.[0]?.frequencyRank, 3014);
+});
+
 test('tokenizeSubtitle ignores invalid frequency ranks', async () => {
   const result = await tokenizeSubtitle(
     '猫',
@@ -1084,6 +1171,106 @@ test('tokenizeSubtitle returns null tokens when Yomitan parsing is unavailable',
   assert.deepEqual(result, { text: '猫です', tokens: null });
 });
 
+test('tokenizeSubtitle skips token payload and annotations when Yomitan parse has no dictionary matches', async () => {
+  let frequencyRequested = false;
+  let jlptLookupCalls = 0;
+  let mecabCalls = 0;
+
+  const result = await tokenizeSubtitle(
+    'これはテスト',
+    makeDeps({
+      getFrequencyDictionaryEnabled: () => true,
+      getYomitanExt: () => ({ id: 'dummy-ext' }) as any,
+      getYomitanParserWindow: () =>
+        ({
+          isDestroyed: () => false,
+          webContents: {
+            executeJavaScript: async (script: string) => {
+              if (script.includes('getTermFrequencies')) {
+                frequencyRequested = true;
+                return [];
+              }
+
+              return [
+                {
+                  source: 'scanning-parser',
+                  index: 0,
+                  content: [
+                    [{ text: 'これは', reading: 'これは' }],
+                    [{ text: 'テスト', reading: 'てすと' }],
+                  ],
+                },
+              ];
+            },
+          },
+        }) as unknown as Electron.BrowserWindow,
+      tokenizeWithMecab: async () => {
+        mecabCalls += 1;
+        return null;
+      },
+      getJlptLevel: () => {
+        jlptLookupCalls += 1;
+        return 'N5';
+      },
+    }),
+  );
+
+  assert.deepEqual(result, { text: 'これはテスト', tokens: null });
+  assert.equal(frequencyRequested, false);
+  assert.equal(jlptLookupCalls, 0);
+  assert.equal(mecabCalls, 0);
+});
+
+test('tokenizeSubtitle excludes Yomitan token groups without dictionary headwords from annotation paths', async () => {
+  let jlptLookupCalls = 0;
+  let frequencyLookupCalls = 0;
+
+  const result = await tokenizeSubtitle(
+    '(ダクネスの荒い息) 猫',
+    makeDeps({
+      getFrequencyDictionaryEnabled: () => true,
+      getYomitanExt: () => ({ id: 'dummy-ext' }) as any,
+      getYomitanParserWindow: () =>
+        ({
+          isDestroyed: () => false,
+          webContents: {
+            executeJavaScript: async (script: string) => {
+              if (script.includes('getTermFrequencies')) {
+                return [];
+              }
+
+              return [
+                {
+                  source: 'scanning-parser',
+                  index: 0,
+                  content: [
+                    [{ text: '(ダクネスの荒い息)', reading: 'だくねすのあらいいき' }],
+                    [{ text: '猫', reading: 'ねこ', headwords: [[{ term: '猫' }]] }],
+                  ],
+                },
+              ];
+            },
+          },
+        }) as unknown as Electron.BrowserWindow,
+      getJlptLevel: (text) => {
+        jlptLookupCalls += 1;
+        return text === '猫' ? 'N5' : null;
+      },
+      getFrequencyRank: () => {
+        frequencyLookupCalls += 1;
+        return 12;
+      },
+      tokenizeWithMecab: async () => null,
+    }),
+  );
+
+  assert.equal(result.tokens?.length, 1);
+  assert.equal(result.tokens?.[0]?.surface, '猫');
+  assert.equal(result.tokens?.[0]?.headword, '猫');
+  assert.equal(jlptLookupCalls, 1);
+  assert.equal(frequencyLookupCalls, 1);
+});
+
 test('tokenizeSubtitle returns null tokens when mecab throws', async () => {
   const result = await tokenizeSubtitle(
     '猫です',
@@ -1097,7 +1284,7 @@ test('tokenizeSubtitle returns null tokens when mecab throws', async () => {
   assert.deepEqual(result, { text: '猫です', tokens: null });
 });
 
-test('tokenizeSubtitle uses Yomitan parser result when available', async () => {
+test('tokenizeSubtitle uses Yomitan parser result when available and drops no-headword groups', async () => {
   const parserWindow = {
     isDestroyed: () => false,
     webContents: {
@@ -1135,13 +1322,10 @@ test('tokenizeSubtitle uses Yomitan parser result when available', async () => {
   );
 
   assert.equal(result.text, '猫です');
-  assert.equal(result.tokens?.length, 2);
+  assert.equal(result.tokens?.length, 1);
   assert.equal(result.tokens?.[0]?.surface, '猫');
   assert.equal(result.tokens?.[0]?.reading, 'ねこ');
   assert.equal(result.tokens?.[0]?.isKnown, false);
-  assert.equal(result.tokens?.[1]?.surface, 'です');
-  assert.equal(result.tokens?.[1]?.reading, 'です');
-  assert.equal(result.tokens?.[1]?.isKnown, false);
 });
 
 test('tokenizeSubtitle logs selected Yomitan groups when debug toggle is enabled', async () => {
@@ -2103,6 +2287,48 @@ test('createTokenizerDepsRuntime checks MeCab availability before first tokenize
   assert.equal(second?.[0]?.surface, '仮面');
 });
 
+test('createTokenizerDepsRuntime skips known-word lookup for MeCab POS enrichment tokens', async () => {
+  let knownWordCalls = 0;
+
+  const deps = createTokenizerDepsRuntime({
+    getYomitanExt: () => null,
+    getYomitanParserWindow: () => null,
+    setYomitanParserWindow: () => {},
+    getYomitanParserReadyPromise: () => null,
+    setYomitanParserReadyPromise: () => {},
+    getYomitanParserInitPromise: () => null,
+    setYomitanParserInitPromise: () => {},
+    isKnownWord: () => {
+      knownWordCalls += 1;
+      return true;
+    },
+    getKnownWordMatchMode: () => 'headword',
+    getJlptLevel: () => null,
+    getMecabTokenizer: () => ({
+      tokenize: async () => [
+        {
+          word: '仮面',
+          partOfSpeech: PartOfSpeech.noun,
+          pos1: '名詞',
+          pos2: '一般',
+          pos3: '',
+          pos4: '',
+          inflectionType: '',
+          inflectionForm: '',
+          headword: '仮面',
+          katakanaReading: 'カメン',
+          pronunciation: 'カメン',
+        },
+      ],
+    }),
+  });
+
+  const tokens = await deps.tokenizeWithMecab('仮面');
+
+  assert.equal(knownWordCalls, 0);
+  assert.equal(tokens?.[0]?.isKnown, false);
+});
+
 test('tokenizeSubtitle uses async MeCab enrichment override when provided', async () => {
   const result = await tokenizeSubtitle(
     '猫',
@@ -2269,7 +2495,6 @@ test('tokenizeSubtitle keeps frequency enrichment while n+1 is disabled', async
   assert.equal(frequencyCalls, 1);
 });
 
-
 test('tokenizeSubtitle excludes default non-independent pos2 from N+1 and frequency annotations', async () => {
   const result = await tokenizeSubtitle(
     'になれば',
@@ -2300,7 +2525,7 @@ test('tokenizeSubtitle excludes default non-independent pos2 from N+1 and freque
   assert.equal(result.tokens?.[0]?.isNPlusOneTarget, false);
 });
 
-test('tokenizeSubtitle keeps merged token when overlap contains at least one content pos1 tag', async () => {
+test('tokenizeSubtitle excludes merged function/content token from frequency highlighting but keeps N+1', async () => {
   const result = await tokenizeSubtitle(
     'になれば',
     makeDepsFromYomitanTokens([{ surface: 'になれば', reading: 'になれば', headword: 'なる' }], {
@@ -2353,7 +2578,7 @@ test('tokenizeSubtitle keeps merged token when overlap contains at least one con
 
   assert.equal(result.tokens?.length, 1);
   assert.equal(result.tokens?.[0]?.pos1, '助詞|動詞');
-  assert.equal(result.tokens?.[0]?.frequencyRank, 13);
+  assert.equal(result.tokens?.[0]?.frequencyRank, undefined);
   assert.equal(result.tokens?.[0]?.isNPlusOneTarget, true);
 });
 

src/core/services/tokenizer.ts

@@ -51,6 +51,7 @@ export interface TokenizerServiceDeps {
   getYomitanGroupDebugEnabled?: () => boolean;
   tokenizeWithMecab: (text: string) => Promise<MergedToken[] | null>;
   enrichTokensWithMecab?: MecabTokenEnrichmentFn;
+  onTokenizationReady?: (text: string) => void;
 }
 
 interface MecabTokenizerLike {
@@ -78,6 +79,7 @@ export interface TokenizerDepsRuntimeOptions {
   getMinSentenceWordsForNPlusOne?: () => number;
   getYomitanGroupDebugEnabled?: () => boolean;
   getMecabTokenizer: () => MecabTokenizerLike | null;
+  onTokenizationReady?: (text: string) => void;
 }
 
 interface TokenizerAnnotationOptions {
@@ -90,13 +92,14 @@ interface TokenizerAnnotationOptions {
   pos2Exclusions: ReadonlySet<string>;
 }
 
-let parserEnrichmentWorkerRuntimeModulePromise:
+let parserEnrichmentWorkerRuntimeModulePromise: Promise<
-  | Promise<typeof import('./tokenizer/parser-enrichment-worker-runtime')>
+  typeof import('./tokenizer/parser-enrichment-worker-runtime')
-  | null = null;
+> | null = null;
-let annotationStageModulePromise: Promise<typeof import('./tokenizer/annotation-stage')> | null = null;
+let annotationStageModulePromise: Promise<typeof import('./tokenizer/annotation-stage')> | null =
-let parserEnrichmentFallbackModulePromise:
+  null;
-  | Promise<typeof import('./tokenizer/parser-enrichment-stage')>
+let parserEnrichmentFallbackModulePromise: Promise<
-  | null = null;
+  typeof import('./tokenizer/parser-enrichment-stage')
+> | null = null;
 const DEFAULT_ANNOTATION_POS1_EXCLUSIONS = resolveAnnotationPos1ExclusionSet(
   DEFAULT_ANNOTATION_POS1_EXCLUSION_CONFIG,
 );
@@ -104,7 +107,10 @@ const DEFAULT_ANNOTATION_POS2_EXCLUSIONS = resolveAnnotationPos2ExclusionSet(
   DEFAULT_ANNOTATION_POS2_EXCLUSION_CONFIG,
 );
 
-function getKnownWordLookup(deps: TokenizerServiceDeps, options: TokenizerAnnotationOptions): (text: string) => boolean {
+function getKnownWordLookup(
+  deps: TokenizerServiceDeps,
+  options: TokenizerAnnotationOptions,
+): (text: string) => boolean {
   if (!options.nPlusOneEnabled) {
     return () => false;
   }
@@ -124,7 +130,8 @@ async function enrichTokensWithMecabAsync(
   mecabTokens: MergedToken[] | null,
 ): Promise<MergedToken[]> {
   if (!parserEnrichmentWorkerRuntimeModulePromise) {
-    parserEnrichmentWorkerRuntimeModulePromise = import('./tokenizer/parser-enrichment-worker-runtime');
+    parserEnrichmentWorkerRuntimeModulePromise =
+      import('./tokenizer/parser-enrichment-worker-runtime');
   }
 
   try {
@@ -183,8 +190,7 @@ export function createTokenizerDepsRuntime(
     getNPlusOneEnabled: options.getNPlusOneEnabled,
     getJlptEnabled: options.getJlptEnabled,
     getFrequencyDictionaryEnabled: options.getFrequencyDictionaryEnabled,
-    getFrequencyDictionaryMatchMode:
+    getFrequencyDictionaryMatchMode: options.getFrequencyDictionaryMatchMode ?? (() => 'headword'),
-      options.getFrequencyDictionaryMatchMode ?? (() => 'headword'),
     getFrequencyRank: options.getFrequencyRank,
     getMinSentenceWordsForNPlusOne: options.getMinSentenceWordsForNPlusOne ?? (() => 3),
     getYomitanGroupDebugEnabled: options.getYomitanGroupDebugEnabled ?? (() => false),
@@ -211,11 +217,11 @@ export function createTokenizerDepsRuntime(
         return null;
       }
 
-      const isKnownWordLookup = options.getNPlusOneEnabled?.() === false ? () => false : options.isKnownWord;
+      return mergeTokens(rawTokens, options.isKnownWord, options.getKnownWordMatchMode(), false);
-      return mergeTokens(rawTokens, isKnownWordLookup, options.getKnownWordMatchMode());
     },
     enrichTokensWithMecab: async (tokens, mecabTokens) =>
       enrichTokensWithMecabAsync(tokens, mecabTokens),
+    onTokenizationReady: options.onTokenizationReady,
   };
 }
 
@@ -330,11 +336,6 @@ function buildYomitanFrequencyTermReadingList(
     const readingRaw =
       token.reading && token.reading.trim().length > 0 ? token.reading.trim() : null;
     termReadingList.push({ term, reading: readingRaw });
-
-    // Yomitan parse readings can be noisy/truncated on merged tokens; include term-only fallback.
-    if (readingRaw !== null) {
-      termReadingList.push({ term, reading: null });
-    }
   }
 
   return termReadingList;
@@ -351,7 +352,8 @@ function buildYomitanFrequencyRankMap(
       continue;
     }
     const dictionaryPriority =
-      typeof frequency.dictionaryPriority === 'number' && Number.isFinite(frequency.dictionaryPriority)
+      typeof frequency.dictionaryPriority === 'number' &&
+      Number.isFinite(frequency.dictionaryPriority)
         ? Math.max(0, Math.floor(frequency.dictionaryPriority))
         : Number.MAX_SAFE_INTEGER;
     const current = rankByTerm.get(normalizedTerm);
@@ -483,6 +485,7 @@ async function parseWithYomitanInternalParser(
   if (deps.getYomitanGroupDebugEnabled?.() === true) {
     logSelectedYomitanGroups(text, normalizedSelectedTokens);
   }
+  deps.onTokenizationReady?.(text);
 
   const frequencyRankPromise: Promise<Map<string, number>> = options.frequencyEnabled
     ? (async () => {
@@ -491,7 +494,11 @@ async function parseWithYomitanInternalParser(
           normalizedSelectedTokens,
           frequencyMatchMode,
         );
-        const yomitanFrequencies = await requestYomitanTermFrequencies(termReadingList, deps, logger);
+        const yomitanFrequencies = await requestYomitanTermFrequencies(
+          termReadingList,
+          deps,
+          logger,
+        );
         return buildYomitanFrequencyRankMap(yomitanFrequencies);
       })()
     : Promise.resolve(new Map<string, number>());

src/core/services/tokenizer/annotation-stage.test.ts

@@ -314,6 +314,26 @@ test('annotateTokens excludes likely kana SFX tokens from frequency when POS tag
   assert.equal(result[0]?.frequencyRank, undefined);
 });
 
+test('annotateTokens keeps frequency when mecab tags classify token as content-bearing', () => {
+  const tokens = [
+    makeToken({
+      surface: 'ふふ',
+      headword: 'ふふ',
+      pos1: '動詞',
+      pos2: '自立',
+      frequencyRank: 3014,
+      startPos: 0,
+      endPos: 2,
+    }),
+  ];
+
+  const result = annotateTokens(tokens, makeDeps(), {
+    minSentenceWordsForNPlusOne: 1,
+  });
+
+  assert.equal(result[0]?.frequencyRank, 3014);
+});
+
 test('annotateTokens allows previously default-excluded pos2 when removed from effective set', () => {
   const tokens = [
     makeToken({
@@ -337,7 +357,7 @@ test('annotateTokens allows previously default-excluded pos2 when removed from e
   assert.equal(result[0]?.isNPlusOneTarget, true);
 });
 
-test('annotateTokens keeps composite tokens when any component pos tag is content-bearing', () => {
+test('annotateTokens excludes composite function/content tokens from frequency but keeps N+1 eligible', () => {
   const tokens = [
     makeToken({
       surface: 'になれば',
@@ -354,7 +374,7 @@ test('annotateTokens keeps composite tokens when any component pos tag is conten
     minSentenceWordsForNPlusOne: 1,
   });
 
-  assert.equal(result[0]?.frequencyRank, 5);
+  assert.equal(result[0]?.frequencyRank, undefined);
   assert.equal(result[0]?.isNPlusOneTarget, true);
 });
 

src/core/services/tokenizer/annotation-stage.ts

@@ -73,8 +73,9 @@ function isExcludedByTagSet(normalizedTag: string, exclusions: ReadonlySet<strin
   if (parts.length === 0) {
     return false;
   }
-  // Composite tags like "助詞|名詞" stay eligible unless every component is excluded.
+  // Frequency highlighting should be conservative: if any merged component is excluded,
-  return parts.every((part) => exclusions.has(part));
+  // skip highlighting the whole token to avoid noisy merged fragments.
+  return parts.some((part) => exclusions.has(part));
 }
 
 function resolvePos1Exclusions(options: AnnotationStageOptions): ReadonlySet<string> {

src/core/services/tokenizer/parser-enrichment-stage.test.ts

@@ -39,6 +39,30 @@ test('enrichTokensWithMecabPos1 fills missing pos1 using surface-sequence fallba
   assert.equal(enriched[0]?.pos1, '助詞');
 });
 
+test('enrichTokensWithMecabPos1 keeps partOfSpeech unchanged and only enriches POS tags', () => {
+  const tokens = [makeToken({ surface: 'これは', startPos: 0, endPos: 3 })];
+  const mecabTokens = [
+    makeToken({
+      surface: 'これ',
+      startPos: 0,
+      endPos: 2,
+      pos1: '名詞',
+      partOfSpeech: PartOfSpeech.noun,
+    }),
+    makeToken({
+      surface: 'は',
+      startPos: 2,
+      endPos: 3,
+      pos1: '助詞',
+      partOfSpeech: PartOfSpeech.particle,
+    }),
+  ];
+
+  const enriched = enrichTokensWithMecabPos1(tokens, mecabTokens);
+  assert.equal(enriched[0]?.pos1, '名詞|助詞');
+  assert.equal(enriched[0]?.partOfSpeech, PartOfSpeech.other);
+});
+
 test('enrichTokensWithMecabPos1 passes through unchanged when mecab tokens are null or empty', () => {
   const tokens = [makeToken({ surface: '猫', startPos: 0, endPos: 1 })];
 
@@ -48,3 +72,77 @@ test('enrichTokensWithMecabPos1 passes through unchanged when mecab tokens are n
   const emptyResult = enrichTokensWithMecabPos1(tokens, []);
   assert.strictEqual(emptyResult, tokens);
 });
+
+test('enrichTokensWithMecabPos1 avoids repeated full scans over distant mecab surfaces', () => {
+  const tokens = Array.from({ length: 12 }, (_, index) =>
+    makeToken({ surface: `w${index}`, startPos: index, endPos: index + 1, pos1: '' }),
+  );
+  const mecabTokens = tokens.map((token) =>
+    makeToken({
+      surface: token.surface,
+      startPos: token.startPos,
+      endPos: token.endPos,
+      pos1: '名詞',
+    }),
+  );
+
+  let distantSurfaceReads = 0;
+  const distantToken = makeToken({ surface: '遠', startPos: 500, endPos: 501, pos1: '記号' });
+  Object.defineProperty(distantToken, 'surface', {
+    configurable: true,
+    get() {
+      distantSurfaceReads += 1;
+      if (distantSurfaceReads > 3) {
+        throw new Error('repeated full scan detected');
+      }
+      return '遠';
+    },
+  });
+  mecabTokens.push(distantToken);
+
+  const enriched = enrichTokensWithMecabPos1(tokens, mecabTokens);
+  assert.equal(enriched.length, tokens.length);
+  for (const token of enriched) {
+    assert.equal(token.pos1, '名詞');
+  }
+});
+
+test('enrichTokensWithMecabPos1 avoids repeated active-candidate filter scans', () => {
+  const tokens = Array.from({ length: 8 }, (_, index) =>
+    makeToken({ surface: `u${index}`, startPos: index, endPos: index + 1, pos1: '' }),
+  );
+  const mecabTokens = [
+    makeToken({ surface: 'SENTINEL', startPos: 0, endPos: 100, pos1: '記号' }),
+    ...tokens.map((token, index) =>
+      makeToken({
+        surface: `m${index}`,
+        startPos: token.startPos,
+        endPos: token.endPos,
+        pos1: '名詞',
+      }),
+    ),
+  ];
+
+  let sentinelFilterCalls = 0;
+  const originalFilter = Array.prototype.filter;
+  Array.prototype.filter = function filterWithSentinelCheck(
+    this: unknown[],
+    ...args: any[]
+  ): any[] {
+    const target = this as Array<{ surface?: string }>;
+    if (target.some((candidate) => candidate?.surface === 'SENTINEL')) {
+      sentinelFilterCalls += 1;
+      if (sentinelFilterCalls > 2) {
+        throw new Error('repeated active candidate filter scan detected');
+      }
+    }
+    return (originalFilter as (...params: any[]) => any[]).apply(this, args);
+  } as typeof Array.prototype.filter;
+
+  try {
+    const enriched = enrichTokensWithMecabPos1(tokens, mecabTokens);
+    assert.equal(enriched.length, tokens.length);
+  } finally {
+    Array.prototype.filter = originalFilter;
+  }
+});

src/core/services/tokenizer/parser-enrichment-stage.ts

@@ -6,6 +6,120 @@ type MecabPosMetadata = {
   pos3?: string;
 };
 
+type IndexedMecabToken = {
+  index: number;
+  start: number;
+  end: number;
+  surface: string;
+  pos1: string;
+  pos2?: string;
+  pos3?: string;
+};
+
+type MecabLookup = {
+  indexedTokens: IndexedMecabToken[];
+  byExactSurface: Map<string, IndexedMecabToken[]>;
+  byTrimmedSurface: Map<string, IndexedMecabToken[]>;
+  byPosition: Map<number, IndexedMecabToken[]>;
+};
+
+function pushMapValue<K, T>(map: Map<K, T[]>, key: K, value: T): void {
+  const existing = map.get(key);
+  if (existing) {
+    existing.push(value);
+    return;
+  }
+  map.set(key, [value]);
+}
+
+function toDiscreteSpan(start: number, end: number): { start: number; end: number } {
+  const discreteStart = Math.floor(start);
+  const discreteEnd = Math.max(discreteStart + 1, Math.ceil(end));
+  return {
+    start: discreteStart,
+    end: discreteEnd,
+  };
+}
+
+function buildMecabLookup(mecabTokens: MergedToken[]): MecabLookup {
+  const indexedTokens: IndexedMecabToken[] = [];
+  for (const [index, token] of mecabTokens.entries()) {
+    const pos1 = token.pos1;
+    if (!pos1) {
+      continue;
+    }
+    const surface = token.surface;
+    const start = token.startPos ?? 0;
+    const end = token.endPos ?? start + surface.length;
+    indexedTokens.push({
+      index,
+      start,
+      end,
+      surface,
+      pos1,
+      pos2: token.pos2,
+      pos3: token.pos3,
+    });
+  }
+
+  const byExactSurface = new Map<string, IndexedMecabToken[]>();
+  const byTrimmedSurface = new Map<string, IndexedMecabToken[]>();
+  const byPosition = new Map<number, IndexedMecabToken[]>();
+  for (const token of indexedTokens) {
+    pushMapValue(byExactSurface, token.surface, token);
+    const trimmedSurface = token.surface.trim();
+    if (trimmedSurface) {
+      pushMapValue(byTrimmedSurface, trimmedSurface, token);
+    }
+
+    const discreteSpan = toDiscreteSpan(token.start, token.end);
+    for (let position = discreteSpan.start; position < discreteSpan.end; position += 1) {
+      pushMapValue(byPosition, position, token);
+    }
+  }
+
+  const byStartThenIndexSort = (left: IndexedMecabToken, right: IndexedMecabToken) =>
+    left.start - right.start || left.index - right.index;
+  for (const candidates of byExactSurface.values()) {
+    candidates.sort(byStartThenIndexSort);
+  }
+
+  return {
+    indexedTokens,
+    byExactSurface,
+    byTrimmedSurface,
+    byPosition,
+  };
+}
+
+function lowerBoundByStart(candidates: IndexedMecabToken[], targetStart: number): number {
+  let low = 0;
+  let high = candidates.length;
+  while (low < high) {
+    const mid = Math.floor((low + high) / 2);
+    if (candidates[mid]!.start < targetStart) {
+      low = mid + 1;
+    } else {
+      high = mid;
+    }
+  }
+  return low;
+}
+
+function lowerBoundByIndex(candidates: IndexedMecabToken[], targetIndex: number): number {
+  let low = 0;
+  let high = candidates.length;
+  while (low < high) {
+    const mid = Math.floor((low + high) / 2);
+    if (candidates[mid]!.index < targetIndex) {
+      low = mid + 1;
+    } else {
+      high = mid;
+    }
+  }
+  return low;
+}
+
 function joinUniqueTags(values: Array<string | undefined>): string | undefined {
   const unique: string[] = [];
   for (const value of values) {
@@ -29,87 +143,129 @@ function joinUniqueTags(values: Array<string | undefined>): string | undefined {
   return unique.join('|');
 }
 
-function pickClosestMecabPosMetadata(
+function pickClosestMecabPosMetadataBySurface(
   token: MergedToken,
-  mecabTokens: MergedToken[],
+  candidates: IndexedMecabToken[] | undefined,
 ): MecabPosMetadata | null {
-  if (mecabTokens.length === 0) {
+  if (!candidates || candidates.length === 0) {
     return null;
   }
 
   const tokenStart = token.startPos ?? 0;
   const tokenEnd = token.endPos ?? tokenStart + token.surface.length;
-  let bestSurfaceMatchToken: MergedToken | null = null;
+  let bestSurfaceMatchToken: IndexedMecabToken | null = null;
   let bestSurfaceMatchDistance = Number.MAX_SAFE_INTEGER;
   let bestSurfaceMatchEndDistance = Number.MAX_SAFE_INTEGER;
+  let bestSurfaceMatchIndex = Number.MAX_SAFE_INTEGER;
 
-  for (const mecabToken of mecabTokens) {
+  const nearestStartIndex = lowerBoundByStart(candidates, tokenStart);
-    if (!mecabToken.pos1) {
+  let left = nearestStartIndex - 1;
-      continue;
+  let right = nearestStartIndex;
+
+  while (left >= 0 || right < candidates.length) {
+    const leftDistance =
+      left >= 0 ? Math.abs(candidates[left]!.start - tokenStart) : Number.MAX_SAFE_INTEGER;
+    const rightDistance =
+      right < candidates.length
+        ? Math.abs(candidates[right]!.start - tokenStart)
+        : Number.MAX_SAFE_INTEGER;
+    const nearestDistance = Math.min(leftDistance, rightDistance);
+    if (nearestDistance > bestSurfaceMatchDistance) {
+      break;
     }
 
-    if (mecabToken.surface !== token.surface) {
+    if (leftDistance === nearestDistance && left >= 0) {
-      continue;
+      const candidate = candidates[left]!;
+      const startDistance = Math.abs(candidate.start - tokenStart);
+      const endDistance = Math.abs(candidate.end - tokenEnd);
+      if (
+        startDistance < bestSurfaceMatchDistance ||
+        (startDistance === bestSurfaceMatchDistance &&
+          (endDistance < bestSurfaceMatchEndDistance ||
+            (endDistance === bestSurfaceMatchEndDistance &&
+              candidate.index < bestSurfaceMatchIndex)))
+      ) {
+        bestSurfaceMatchDistance = startDistance;
+        bestSurfaceMatchEndDistance = endDistance;
+        bestSurfaceMatchIndex = candidate.index;
+        bestSurfaceMatchToken = candidate;
+      }
+      left -= 1;
     }
-
+    if (rightDistance === nearestDistance && right < candidates.length) {
-    const mecabStart = mecabToken.startPos ?? 0;
+      const candidate = candidates[right]!;
-    const mecabEnd = mecabToken.endPos ?? mecabStart + mecabToken.surface.length;
+      const startDistance = Math.abs(candidate.start - tokenStart);
-    const startDistance = Math.abs(mecabStart - tokenStart);
+      const endDistance = Math.abs(candidate.end - tokenEnd);
-    const endDistance = Math.abs(mecabEnd - tokenEnd);
+      if (
-
+        startDistance < bestSurfaceMatchDistance ||
-    if (
+        (startDistance === bestSurfaceMatchDistance &&
-      startDistance < bestSurfaceMatchDistance ||
+          (endDistance < bestSurfaceMatchEndDistance ||
-      (startDistance === bestSurfaceMatchDistance && endDistance < bestSurfaceMatchEndDistance)
+            (endDistance === bestSurfaceMatchEndDistance &&
-    ) {
+              candidate.index < bestSurfaceMatchIndex)))
-      bestSurfaceMatchDistance = startDistance;
+      ) {
-      bestSurfaceMatchEndDistance = endDistance;
+        bestSurfaceMatchDistance = startDistance;
-      bestSurfaceMatchToken = mecabToken;
+        bestSurfaceMatchEndDistance = endDistance;
+        bestSurfaceMatchIndex = candidate.index;
+        bestSurfaceMatchToken = candidate;
+      }
+      right += 1;
     }
   }
 
-  if (bestSurfaceMatchToken) {
+  if (bestSurfaceMatchToken !== null) {
     return {
-      pos1: bestSurfaceMatchToken.pos1 as string,
+      pos1: bestSurfaceMatchToken.pos1,
       pos2: bestSurfaceMatchToken.pos2,
       pos3: bestSurfaceMatchToken.pos3,
     };
   }
 
-  let bestToken: MergedToken | null = null;
+  return null;
+}
+
+function pickClosestMecabPosMetadataByOverlap(
+  token: MergedToken,
+  candidates: IndexedMecabToken[],
+): MecabPosMetadata | null {
+  const tokenStart = token.startPos ?? 0;
+  const tokenEnd = token.endPos ?? tokenStart + token.surface.length;
+  let bestToken: IndexedMecabToken | null = null;
   let bestOverlap = 0;
   let bestSpan = 0;
   let bestStartDistance = Number.MAX_SAFE_INTEGER;
   let bestStart = Number.MAX_SAFE_INTEGER;
-  const overlappingTokens: MergedToken[] = [];
+  let bestIndex = Number.MAX_SAFE_INTEGER;
+  const overlappingTokens: IndexedMecabToken[] = [];
 
-  for (const mecabToken of mecabTokens) {
+  for (const candidate of candidates) {
-    if (!mecabToken.pos1) {
+    const mecabStart = candidate.start;
-      continue;
+    const mecabEnd = candidate.end;
-    }
-
-    const mecabStart = mecabToken.startPos ?? 0;
-    const mecabEnd = mecabToken.endPos ?? mecabStart + mecabToken.surface.length;
     const overlapStart = Math.max(tokenStart, mecabStart);
     const overlapEnd = Math.min(tokenEnd, mecabEnd);
     const overlap = Math.max(0, overlapEnd - overlapStart);
     if (overlap === 0) {
       continue;
     }
-    overlappingTokens.push(mecabToken);
+    overlappingTokens.push(candidate);
 
     const span = mecabEnd - mecabStart;
+    const startDistance = Math.abs(mecabStart - tokenStart);
     if (
       overlap > bestOverlap ||
       (overlap === bestOverlap &&
-        (Math.abs(mecabStart - tokenStart) < bestStartDistance ||
+        (startDistance < bestStartDistance ||
-          (Math.abs(mecabStart - tokenStart) === bestStartDistance &&
+          (startDistance === bestStartDistance &&
-            (span > bestSpan || (span === bestSpan && mecabStart < bestStart)))))
+            (span > bestSpan ||
+              (span === bestSpan &&
+                (mecabStart < bestStart ||
+                  (mecabStart === bestStart && candidate.index < bestIndex)))))))
     ) {
       bestOverlap = overlap;
       bestSpan = span;
-      bestStartDistance = Math.abs(mecabStart - tokenStart);
+      bestStartDistance = startDistance;
       bestStart = mecabStart;
-      bestToken = mecabToken;
+      bestIndex = candidate.index;
+      bestToken = candidate;
     }
   }
 
@@ -117,12 +273,21 @@ function pickClosestMecabPosMetadata(
     return null;
   }
 
-  const overlapPos1 = joinUniqueTags(overlappingTokens.map((token) => token.pos1));
+  const overlappingTokensByMecabOrder = overlappingTokens
-  const overlapPos2 = joinUniqueTags(overlappingTokens.map((token) => token.pos2));
+    .slice()
-  const overlapPos3 = joinUniqueTags(overlappingTokens.map((token) => token.pos3));
+    .sort((left, right) => left.index - right.index);
+  const overlapPos1 = joinUniqueTags(
+    overlappingTokensByMecabOrder.map((candidate) => candidate.pos1),
+  );
+  const overlapPos2 = joinUniqueTags(
+    overlappingTokensByMecabOrder.map((candidate) => candidate.pos2),
+  );
+  const overlapPos3 = joinUniqueTags(
+    overlappingTokensByMecabOrder.map((candidate) => candidate.pos3),
+  );
 
   return {
-    pos1: overlapPos1 ?? (bestToken.pos1 as string),
+    pos1: overlapPos1 ?? bestToken.pos1,
     pos2: overlapPos2 ?? bestToken.pos2,
     pos3: overlapPos3 ?? bestToken.pos3,
   };
@@ -130,13 +295,9 @@ function pickClosestMecabPosMetadata(
 
 function fillMissingPos1BySurfaceSequence(
   tokens: MergedToken[],
-  mecabTokens: MergedToken[],
+  byTrimmedSurface: Map<string, IndexedMecabToken[]>,
 ): MergedToken[] {
-  const indexedMecabTokens = mecabTokens
+  if (byTrimmedSurface.size === 0) {
-    .map((token, index) => ({ token, index }))
-    .filter(({ token }) => token.pos1 && token.surface.trim().length > 0);
-
-  if (indexedMecabTokens.length === 0) {
     return tokens;
   }
 
@@ -151,27 +312,13 @@ function fillMissingPos1BySurfaceSequence(
       return token;
     }
 
-    let best: { token: MergedToken; index: number } | null = null;
+    const candidates = byTrimmedSurface.get(surface);
-    for (const candidate of indexedMecabTokens) {
+    if (!candidates || candidates.length === 0) {
-      if (candidate.token.surface !== surface) {
+      return token;
-        continue;
-      }
-      if (candidate.index < cursor) {
-        continue;
-      }
-      best = { token: candidate.token, index: candidate.index };
-      break;
     }
 
-    if (!best) {
+    const atOrAfterCursorIndex = lowerBoundByIndex(candidates, cursor);
-      for (const candidate of indexedMecabTokens) {
+    const best = candidates[atOrAfterCursorIndex] ?? candidates[0];
-        if (candidate.token.surface !== surface) {
-          continue;
-        }
-        best = { token: candidate.token, index: candidate.index };
-        break;
-      }
-    }
 
     if (!best) {
       return token;
@@ -180,13 +327,41 @@ function fillMissingPos1BySurfaceSequence(
     cursor = best.index + 1;
     return {
       ...token,
-      pos1: best.token.pos1,
+      pos1: best.pos1,
-      pos2: best.token.pos2,
+      pos2: best.pos2,
-      pos3: best.token.pos3,
+      pos3: best.pos3,
     };
   });
 }
 
+function collectOverlapCandidatesByPosition(
+  token: MergedToken,
+  byPosition: Map<number, IndexedMecabToken[]>,
+): IndexedMecabToken[] {
+  const tokenStart = token.startPos ?? 0;
+  const tokenEnd = token.endPos ?? tokenStart + token.surface.length;
+  const discreteSpan = toDiscreteSpan(tokenStart, tokenEnd);
+  const seen = new Set<number>();
+  const overlapCandidates: IndexedMecabToken[] = [];
+
+  for (let position = discreteSpan.start; position < discreteSpan.end; position += 1) {
+    const candidatesAtPosition = byPosition.get(position);
+    if (!candidatesAtPosition) {
+      continue;
+    }
+
+    for (const candidate of candidatesAtPosition) {
+      if (seen.has(candidate.index)) {
+        continue;
+      }
+      seen.add(candidate.index);
+      overlapCandidates.push(candidate);
+    }
+  }
+
+  return overlapCandidates;
+}
+
 export function enrichTokensWithMecabPos1(
   tokens: MergedToken[],
   mecabTokens: MergedToken[] | null,
@@ -199,12 +374,36 @@ export function enrichTokensWithMecabPos1(
     return tokens;
   }
 
-  const overlapEnriched = tokens.map((token) => {
+  const lookup = buildMecabLookup(mecabTokens);
+  if (lookup.indexedTokens.length === 0) {
+    return tokens;
+  }
+
+  const metadataByTokenIndex = new Map<number, MecabPosMetadata>();
+
+  for (const [index, token] of tokens.entries()) {
     if (token.pos1) {
-      return token;
+      continue;
     }
 
-    const metadata = pickClosestMecabPosMetadata(token, mecabTokens);
+    const surfaceMetadata = pickClosestMecabPosMetadataBySurface(
+      token,
+      lookup.byExactSurface.get(token.surface),
+    );
+    if (surfaceMetadata) {
+      metadataByTokenIndex.set(index, surfaceMetadata);
+      continue;
+    }
+
+    const overlapCandidates = collectOverlapCandidatesByPosition(token, lookup.byPosition);
+    const overlapMetadata = pickClosestMecabPosMetadataByOverlap(token, overlapCandidates);
+    if (overlapMetadata) {
+      metadataByTokenIndex.set(index, overlapMetadata);
+    }
+  }
+
+  const overlapEnriched = tokens.map((token, index) => {
+    const metadata = metadataByTokenIndex.get(index);
     if (!metadata) {
       return token;
     }
@@ -217,5 +416,5 @@ export function enrichTokensWithMecabPos1(
     };
   });
 
-  return fillMissingPos1BySurfaceSequence(overlapEnriched, mecabTokens);
+  return fillMissingPos1BySurfaceSequence(overlapEnriched, lookup.byTrimmedSurface);
 }

src/core/services/tokenizer/parser-selection-stage.test.ts

@@ -51,7 +51,7 @@ test('prefers scanning parser when scanning candidate has more than one token',
 test('keeps scanning parser candidate when scanning candidate is single token', () => {
   const parseResults = [
     makeParseItem('scanning-parser', [
-      [{ text: '俺は公園にいきたい', reading: 'おれはこうえんにいきたい' }],
+      [{ text: '俺は公園にいきたい', reading: 'おれはこうえんにいきたい', headword: '行きたい' }],
     ]),
     makeParseItem('mecab', [
       [{ text: '俺', reading: 'おれ', headword: '俺' }],
@@ -96,3 +96,34 @@ test('returns null when only mecab-source candidates are present', () => {
   const tokens = selectYomitanParseTokens(parseResults, () => false, 'headword');
   assert.equal(tokens, null);
 });
+
+test('returns null when scanning parser candidates have no dictionary headwords', () => {
+  const parseResults = [
+    makeParseItem('scanning-parser', [
+      [{ text: 'これは', reading: 'これは' }],
+      [{ text: 'テスト', reading: 'てすと' }],
+    ]),
+  ];
+
+  const tokens = selectYomitanParseTokens(parseResults, () => false, 'headword');
+  assert.equal(tokens, null);
+});
+
+test('drops scanning parser tokens which have no dictionary headword', () => {
+  const parseResults = [
+    makeParseItem('scanning-parser', [
+      [{ text: '(ダクネスの荒い息)', reading: 'だくねすのあらいいき' }],
+      [{ text: 'アクア', reading: 'あくあ', headword: 'アクア' }],
+      [{ text: 'トラウマ', reading: 'とらうま', headword: 'トラウマ' }],
+    ]),
+  ];
+
+  const tokens = selectYomitanParseTokens(parseResults, () => false, 'headword');
+  assert.deepEqual(
+    tokens?.map((token) => ({ surface: token.surface, headword: token.headword })),
+    [
+      { surface: 'アクア', headword: 'アクア' },
+      { surface: 'トラウマ', headword: 'トラウマ' },
+    ],
+  );
+});

src/core/services/tokenizer/parser-selection-stage.ts

@@ -130,6 +130,7 @@ export function mapYomitanParseResultItemToMergedTokens(
   const tokens: MergedToken[] = [];
   let charOffset = 0;
   let validLineCount = 0;
+  let hasDictionaryMatch = false;
 
   for (const line of content) {
     if (!isYomitanParseLine(line)) {
@@ -163,7 +164,13 @@ export function mapYomitanParseResultItemToMergedTokens(
     const start = charOffset;
     const end = start + combinedSurface.length;
     charOffset = end;
-    const headword = combinedHeadword || combinedSurface;
+    if (!combinedHeadword) {
+      // No dictionary-backed headword for this merged unit; skip it entirely so
+      // downstream keyboard/frequency/JLPT flows only operate on lookup-backed tokens.
+      continue;
+    }
+    hasDictionaryMatch = true;
+    const headword = combinedHeadword;
 
     tokens.push({
       surface: combinedSurface,
@@ -182,7 +189,7 @@ export function mapYomitanParseResultItemToMergedTokens(
     });
   }
 
-  if (validLineCount === 0 || tokens.length === 0) {
+  if (validLineCount === 0 || tokens.length === 0 || !hasDictionaryMatch) {
     return null;
   }
 

src/core/services/tokenizer/yomitan-parser-runtime.test.ts

@@ -1,6 +1,7 @@
 import assert from 'node:assert/strict';
 import test from 'node:test';
 import {
+  requestYomitanParseResults,
   requestYomitanTermFrequencies,
   syncYomitanDefaultAnkiServer,
 } from './yomitan-parser-runtime';
@@ -40,18 +41,63 @@ test('syncYomitanDefaultAnkiServer updates default profile server when script re
   assert.equal(updated, true);
   assert.match(scriptValue, /optionsGetFull/);
   assert.match(scriptValue, /setAllSettings/);
+  assert.match(scriptValue, /profileCurrent/);
+  assert.match(scriptValue, /forceOverride = false/);
   assert.equal(infoLogs.length, 1);
 });
 
-test('syncYomitanDefaultAnkiServer returns false when script reports no change', async () => {
+test('syncYomitanDefaultAnkiServer returns true when script reports no change', async () => {
   const deps = createDeps(async () => ({ updated: false }));
+  let infoLogCount = 0;
 
-  const updated = await syncYomitanDefaultAnkiServer('http://127.0.0.1:8766', deps, {
+  const synced = await syncYomitanDefaultAnkiServer('http://127.0.0.1:8766', deps, {
     error: () => undefined,
-    info: () => undefined,
+    info: () => {
+      infoLogCount += 1;
+    },
   });
 
-  assert.equal(updated, false);
+  assert.equal(synced, true);
+  assert.equal(infoLogCount, 0);
+});
+
+test('syncYomitanDefaultAnkiServer returns false when existing non-default server blocks update', async () => {
+  const deps = createDeps(async () => ({
+    updated: false,
+    matched: false,
+    reason: 'blocked-existing-server',
+  }));
+  const infoLogs: string[] = [];
+
+  const synced = await syncYomitanDefaultAnkiServer('http://127.0.0.1:8766', deps, {
+    error: () => undefined,
+    info: (message) => infoLogs.push(message),
+  });
+
+  assert.equal(synced, false);
+  assert.equal(infoLogs.length, 1);
+  assert.match(infoLogs[0] ?? '', /blocked-existing-server/);
+});
+
+test('syncYomitanDefaultAnkiServer injects force override when enabled', async () => {
+  let scriptValue = '';
+  const deps = createDeps(async (script) => {
+    scriptValue = script;
+    return { updated: false, matched: true };
+  });
+
+  const synced = await syncYomitanDefaultAnkiServer(
+    'http://127.0.0.1:8766',
+    deps,
+    {
+      error: () => undefined,
+      info: () => undefined,
+    },
+    { forceOverride: true },
+  );
+
+  assert.equal(synced, true);
+  assert.match(scriptValue, /forceOverride = true/);
 });
 
 test('syncYomitanDefaultAnkiServer logs and returns false on script failure', async () => {
@@ -152,6 +198,102 @@ test('requestYomitanTermFrequencies prefers primary rank from displayValue array
   assert.equal(result[0]?.frequency, 7141);
 });
 
+test('requestYomitanTermFrequencies requests term-only fallback only after reading miss', async () => {
+  const frequencyScripts: string[] = [];
+  const deps = createDeps(async (script) => {
+    if (script.includes('optionsGetFull')) {
+      return {
+        profileCurrent: 0,
+        profiles: [
+          {
+            options: {
+              scanning: { length: 40 },
+              dictionaries: [{ name: 'freq-dict', enabled: true, id: 0 }],
+            },
+          },
+        ],
+      };
+    }
+
+    if (!script.includes('getTermFrequencies')) {
+      return [];
+    }
+
+    frequencyScripts.push(script);
+    if (script.includes('"term":"断じて","reading":"だん"')) {
+      return [];
+    }
+    if (script.includes('"term":"断じて","reading":null')) {
+      return [
+        {
+          term: '断じて',
+          reading: null,
+          dictionary: 'freq-dict',
+          frequency: 7082,
+          displayValue: '7082',
+          displayValueParsed: true,
+        },
+      ];
+    }
+    return [];
+  });
+
+  const result = await requestYomitanTermFrequencies([{ term: '断じて', reading: 'だん' }], deps, {
+    error: () => undefined,
+  });
+
+  assert.equal(result.length, 1);
+  assert.equal(result[0]?.frequency, 7082);
+  assert.equal(frequencyScripts.length, 2);
+  assert.match(frequencyScripts[0] ?? '', /"term":"断じて","reading":"だん"/);
+  assert.doesNotMatch(frequencyScripts[0] ?? '', /"term":"断じて","reading":null/);
+  assert.match(frequencyScripts[1] ?? '', /"term":"断じて","reading":null/);
+});
+
+test('requestYomitanTermFrequencies avoids term-only fallback request when reading lookup succeeds', async () => {
+  const frequencyScripts: string[] = [];
+  const deps = createDeps(async (script) => {
+    if (script.includes('optionsGetFull')) {
+      return {
+        profileCurrent: 0,
+        profiles: [
+          {
+            options: {
+              scanning: { length: 40 },
+              dictionaries: [{ name: 'freq-dict', enabled: true, id: 0 }],
+            },
+          },
+        ],
+      };
+    }
+
+    if (!script.includes('getTermFrequencies')) {
+      return [];
+    }
+
+    frequencyScripts.push(script);
+    return [
+      {
+        term: '鍛える',
+        reading: 'きたえる',
+        dictionary: 'freq-dict',
+        frequency: 2847,
+        displayValue: '2847',
+        displayValueParsed: true,
+      },
+    ];
+  });
+
+  const result = await requestYomitanTermFrequencies([{ term: '鍛える', reading: 'きた' }], deps, {
+    error: () => undefined,
+  });
+
+  assert.equal(result.length, 1);
+  assert.equal(frequencyScripts.length, 1);
+  assert.match(frequencyScripts[0] ?? '', /"term":"鍛える","reading":"きた"/);
+  assert.doesNotMatch(frequencyScripts[0] ?? '', /"term":"鍛える","reading":null/);
+});
+
 test('requestYomitanTermFrequencies caches profile metadata between calls', async () => {
   const scripts: string[] = [];
   const deps = createDeps(async (script) => {
@@ -246,3 +388,32 @@ test('requestYomitanTermFrequencies caches repeated term+reading lookups', async
   const frequencyCalls = scripts.filter((script) => script.includes('getTermFrequencies')).length;
   assert.equal(frequencyCalls, 1);
 });
+
+test('requestYomitanParseResults disables Yomitan MeCab parser path', async () => {
+  const scripts: string[] = [];
+  const deps = createDeps(async (script) => {
+    scripts.push(script);
+    if (script.includes('optionsGetFull')) {
+      return {
+        profileCurrent: 0,
+        profiles: [
+          {
+            options: {
+              scanning: { length: 40 },
+            },
+          },
+        ],
+      };
+    }
+    return [];
+  });
+
+  const result = await requestYomitanParseResults('猫です', deps, {
+    error: () => undefined,
+  });
+
+  assert.deepEqual(result, []);
+  const parseScript = scripts.find((script) => script.includes('parseText'));
+  assert.ok(parseScript, 'expected parseText request script');
+  assert.match(parseScript ?? '', /useMecabParser:\s*false/);
+});

src/core/services/tokenizer/yomitan-parser-runtime.ts

@@ -39,7 +39,10 @@ interface YomitanProfileMetadata {
 
 const DEFAULT_YOMITAN_SCAN_LENGTH = 40;
 const yomitanProfileMetadataByWindow = new WeakMap<BrowserWindow, YomitanProfileMetadata>();
-const yomitanFrequencyCacheByWindow = new WeakMap<BrowserWindow, Map<string, YomitanTermFrequency[]>>();
+const yomitanFrequencyCacheByWindow = new WeakMap<
+  BrowserWindow,
+  Map<string, YomitanTermFrequency[]>
+>();
 
 function isObject(value: unknown): value is Record<string, unknown> {
   return Boolean(value && typeof value === 'object');
@@ -87,7 +90,7 @@ function parsePositiveFrequencyString(value: string): number | null {
   const chunks = numericPrefix.split(',');
   const normalizedNumber =
     chunks.length <= 1
-      ? chunks[0] ?? ''
+      ? (chunks[0] ?? '')
       : chunks.slice(1).every((chunk) => /^\d{3}$/.test(chunk))
         ? chunks.join('')
         : (chunks[0] ?? '');
@@ -145,11 +148,7 @@ function toYomitanTermFrequency(value: unknown): YomitanTermFrequency | null {
       : Number.MAX_SAFE_INTEGER;
 
   const reading =
-    value.reading === null
+    value.reading === null ? null : typeof value.reading === 'string' ? value.reading : null;
-      ? null
-      : typeof value.reading === 'string'
-        ? value.reading
-        : null;
   const displayValue = typeof displayValueRaw === 'string' ? displayValueRaw : null;
   const displayValueParsed = value.displayValueParsed === true;
 
@@ -164,7 +163,9 @@ function toYomitanTermFrequency(value: unknown): YomitanTermFrequency | null {
   };
 }
 
-function normalizeTermReadingList(termReadingList: YomitanTermReadingPair[]): YomitanTermReadingPair[] {
+function normalizeTermReadingList(
+  termReadingList: YomitanTermReadingPair[],
+): YomitanTermReadingPair[] {
   const normalized: YomitanTermReadingPair[] = [];
   const seen = new Set<string>();
 
@@ -174,7 +175,9 @@ function normalizeTermReadingList(termReadingList: YomitanTermReadingPair[]): Yo
       continue;
     }
     const reading =
-      typeof pair.reading === 'string' && pair.reading.trim().length > 0 ? pair.reading.trim() : null;
+      typeof pair.reading === 'string' && pair.reading.trim().length > 0
+        ? pair.reading.trim()
+        : null;
     const key = `${term}\u0000${reading ?? ''}`;
     if (seen.has(key)) {
       continue;
@@ -298,7 +301,9 @@ function groupFrequencyEntriesByPair(
   const grouped = new Map<string, YomitanTermFrequency[]>();
   for (const entry of entries) {
     const reading =
-      typeof entry.reading === 'string' && entry.reading.trim().length > 0 ? entry.reading.trim() : null;
+      typeof entry.reading === 'string' && entry.reading.trim().length > 0
+        ? entry.reading.trim()
+        : null;
     const key = makeTermReadingCacheKey(entry.term.trim(), reading);
     const existing = grouped.get(key);
     if (existing) {
@@ -529,7 +534,7 @@ export async function requestYomitanParseResults(
         optionsContext: { index: ${metadata.profileIndex} },
         scanLength: ${metadata.scanLength},
         useInternalParser: true,
-        useMecabParser: true
+        useMecabParser: false
       });
     })();
   `
@@ -564,7 +569,7 @@ export async function requestYomitanParseResults(
         optionsContext: { index: profileIndex },
         scanLength,
         useInternalParser: true,
-        useMecabParser: true
+        useMecabParser: false
       });
     })();
   `;
@@ -578,6 +583,144 @@ export async function requestYomitanParseResults(
   }
 }
 
+async function fetchYomitanTermFrequencies(
+  parserWindow: BrowserWindow,
+  termReadingList: YomitanTermReadingPair[],
+  metadata: YomitanProfileMetadata | null,
+  logger: LoggerLike,
+): Promise<YomitanTermFrequency[] | null> {
+  if (metadata && metadata.dictionaries.length > 0) {
+    const script = `
+      (async () => {
+        const invoke = (action, params) =>
+          new Promise((resolve, reject) => {
+            chrome.runtime.sendMessage({ action, params }, (response) => {
+              if (chrome.runtime.lastError) {
+                reject(new Error(chrome.runtime.lastError.message));
+                return;
+              }
+              if (!response || typeof response !== "object") {
+                reject(new Error("Invalid response from Yomitan backend"));
+                return;
+              }
+              if (response.error) {
+                reject(new Error(response.error.message || "Yomitan backend error"));
+                return;
+              }
+              resolve(response.result);
+            });
+          });
+
+        return await invoke("getTermFrequencies", {
+          termReadingList: ${JSON.stringify(termReadingList)},
+          dictionaries: ${JSON.stringify(metadata.dictionaries)}
+        });
+      })();
+    `;
+
+    try {
+      const rawResult = await parserWindow.webContents.executeJavaScript(script, true);
+      return Array.isArray(rawResult)
+        ? normalizeFrequencyEntriesWithPriority(rawResult, metadata.dictionaryPriorityByName)
+        : [];
+    } catch (err) {
+      logger.error('Yomitan term frequency request failed:', (err as Error).message);
+      return null;
+    }
+  }
+
+  const script = `
+    (async () => {
+      const invoke = (action, params) =>
+        new Promise((resolve, reject) => {
+          chrome.runtime.sendMessage({ action, params }, (response) => {
+            if (chrome.runtime.lastError) {
+              reject(new Error(chrome.runtime.lastError.message));
+              return;
+            }
+            if (!response || typeof response !== "object") {
+              reject(new Error("Invalid response from Yomitan backend"));
+              return;
+            }
+            if (response.error) {
+              reject(new Error(response.error.message || "Yomitan backend error"));
+              return;
+            }
+            resolve(response.result);
+          });
+        });
+
+      const optionsFull = await invoke("optionsGetFull", undefined);
+      const profileIndex = optionsFull.profileCurrent;
+      const dictionariesRaw = optionsFull.profiles?.[profileIndex]?.options?.dictionaries ?? [];
+      const dictionaryEntries = Array.isArray(dictionariesRaw)
+        ? dictionariesRaw
+            .filter((entry) => entry && typeof entry === "object" && entry.enabled === true && typeof entry.name === "string")
+            .map((entry, index) => ({
+              name: entry.name,
+              id: typeof entry.id === "number" && Number.isFinite(entry.id) ? Math.floor(entry.id) : index
+            }))
+            .sort((a, b) => a.id - b.id)
+        : [];
+      const dictionaries = dictionaryEntries.map((entry) => entry.name);
+      const dictionaryPriorityByName = dictionaryEntries.reduce((acc, entry, index) => {
+        acc[entry.name] = index;
+        return acc;
+      }, {});
+
+      if (dictionaries.length === 0) {
+        return [];
+      }
+
+      const rawFrequencies = await invoke("getTermFrequencies", {
+        termReadingList: ${JSON.stringify(termReadingList)},
+        dictionaries
+      });
+
+      if (!Array.isArray(rawFrequencies)) {
+        return [];
+      }
+
+      return rawFrequencies
+        .filter((entry) => entry && typeof entry === "object")
+        .map((entry) => ({
+          ...entry,
+          dictionaryPriority:
+            typeof entry.dictionary === "string" && dictionaryPriorityByName[entry.dictionary] !== undefined
+              ? dictionaryPriorityByName[entry.dictionary]
+              : Number.MAX_SAFE_INTEGER
+        }));
+    })();
+  `;
+
+  try {
+    const rawResult = await parserWindow.webContents.executeJavaScript(script, true);
+    return Array.isArray(rawResult)
+      ? rawResult
+          .map((entry) => toYomitanTermFrequency(entry))
+          .filter((entry): entry is YomitanTermFrequency => entry !== null)
+      : [];
+  } catch (err) {
+    logger.error('Yomitan term frequency request failed:', (err as Error).message);
+    return null;
+  }
+}
+
+function cacheFrequencyEntriesForPairs(
+  frequencyCache: Map<string, YomitanTermFrequency[]>,
+  termReadingList: YomitanTermReadingPair[],
+  fetchedEntries: YomitanTermFrequency[],
+): void {
+  const groupedByPair = groupFrequencyEntriesByPair(fetchedEntries);
+  const groupedByTerm = groupFrequencyEntriesByTerm(fetchedEntries);
+  for (const pair of termReadingList) {
+    const key = makeTermReadingCacheKey(pair.term, pair.reading);
+    const exactEntries = groupedByPair.get(key);
+    const termEntries = groupedByTerm.get(pair.term) ?? [];
+    frequencyCache.set(key, exactEntries ?? termEntries);
+  }
+}
+
 export async function requestYomitanTermFrequencies(
   termReadingList: YomitanTermReadingPair[],
   deps: YomitanParserRuntimeDeps,
@@ -622,159 +765,98 @@ export async function requestYomitanTermFrequencies(
     return buildCachedResult();
   }
 
-  if (metadata && metadata.dictionaries.length > 0) {
+  const fetchedEntries = await fetchYomitanTermFrequencies(
-    const script = `
+    parserWindow,
-      (async () => {
+    missingTermReadingList,
-        const invoke = (action, params) =>
+    metadata,
-          new Promise((resolve, reject) => {
+    logger,
-            chrome.runtime.sendMessage({ action, params }, (response) => {
+  );
-              if (chrome.runtime.lastError) {
+  if (fetchedEntries === null) {
-                reject(new Error(chrome.runtime.lastError.message));
+    return buildCachedResult();
-                return;
+  }
-              }
-              if (!response || typeof response !== "object") {
-                reject(new Error("Invalid response from Yomitan backend"));
-                return;
-              }
-              if (response.error) {
-                reject(new Error(response.error.message || "Yomitan backend error"));
-                return;
-              }
-              resolve(response.result);
-            });
-          });
 
-        return await invoke("getTermFrequencies", {
+  cacheFrequencyEntriesForPairs(frequencyCache, missingTermReadingList, fetchedEntries);
-          termReadingList: ${JSON.stringify(missingTermReadingList)},
-          dictionaries: ${JSON.stringify(metadata.dictionaries)}
-        });
-      })();
-    `;
 
-    try {
+  const fallbackTermReadingList = normalizeTermReadingList(
-      const rawResult = await parserWindow.webContents.executeJavaScript(script, true);
+    missingTermReadingList
-      const fetchedEntries = Array.isArray(rawResult)
+      .filter((pair) => pair.reading !== null)
-        ? normalizeFrequencyEntriesWithPriority(rawResult, metadata.dictionaryPriorityByName)
+      .map((pair) => {
-        : [];
-      const groupedByPair = groupFrequencyEntriesByPair(fetchedEntries);
-      const groupedByTerm = groupFrequencyEntriesByTerm(fetchedEntries);
-      const missingTerms = new Set(missingTermReadingList.map((pair) => pair.term));
-
-      for (const pair of missingTermReadingList) {
         const key = makeTermReadingCacheKey(pair.term, pair.reading);
-        const exactEntries = groupedByPair.get(key);
+        const cachedEntries = frequencyCache.get(key);
-        const termEntries = groupedByTerm.get(pair.term) ?? [];
+        if (cachedEntries && cachedEntries.length > 0) {
-        frequencyCache.set(key, exactEntries ?? termEntries);
+          return null;
-      }
+        }
 
-      const cachedResult = buildCachedResult();
+        const fallbackKey = makeTermReadingCacheKey(pair.term, null);
-      const unmatchedEntries = fetchedEntries.filter((entry) => !missingTerms.has(entry.term.trim()));
+        const cachedFallback = frequencyCache.get(fallbackKey);
-      return [...cachedResult, ...unmatchedEntries];
+        if (cachedFallback && cachedFallback.length > 0) {
-    } catch (err) {
+          frequencyCache.set(key, cachedFallback);
-      logger.error('Yomitan term frequency request failed:', (err as Error).message);
+          return null;
+        }
+
+        return { term: pair.term, reading: null };
+      })
+      .filter((pair): pair is { term: string; reading: null } => pair !== null),
+  ).filter((pair) => !frequencyCache.has(makeTermReadingCacheKey(pair.term, pair.reading)));
+
+  let fallbackFetchedEntries: YomitanTermFrequency[] = [];
+
+  if (fallbackTermReadingList.length > 0) {
+    const fallbackFetchResult = await fetchYomitanTermFrequencies(
+      parserWindow,
+      fallbackTermReadingList,
+      metadata,
+      logger,
+    );
+    if (fallbackFetchResult !== null) {
+      fallbackFetchedEntries = fallbackFetchResult;
+      cacheFrequencyEntriesForPairs(
+        frequencyCache,
+        fallbackTermReadingList,
+        fallbackFetchedEntries,
+      );
     }
 
-    return buildCachedResult();
-  }
-
-  const script = `
-    (async () => {
-      const invoke = (action, params) =>
-        new Promise((resolve, reject) => {
-          chrome.runtime.sendMessage({ action, params }, (response) => {
-            if (chrome.runtime.lastError) {
-              reject(new Error(chrome.runtime.lastError.message));
-              return;
-            }
-            if (!response || typeof response !== "object") {
-              reject(new Error("Invalid response from Yomitan backend"));
-              return;
-            }
-            if (response.error) {
-              reject(new Error(response.error.message || "Yomitan backend error"));
-              return;
-            }
-            resolve(response.result);
-          });
-        });
-
-      const optionsFull = await invoke("optionsGetFull", undefined);
-      const profileIndex = optionsFull.profileCurrent;
-      const dictionariesRaw = optionsFull.profiles?.[profileIndex]?.options?.dictionaries ?? [];
-      const dictionaryEntries = Array.isArray(dictionariesRaw)
-        ? dictionariesRaw
-            .filter((entry) => entry && typeof entry === "object" && entry.enabled === true && typeof entry.name === "string")
-            .map((entry, index) => ({
-              name: entry.name,
-              id: typeof entry.id === "number" && Number.isFinite(entry.id) ? Math.floor(entry.id) : index
-            }))
-            .sort((a, b) => a.id - b.id)
-        : [];
-      const dictionaries = dictionaryEntries.map((entry) => entry.name);
-      const dictionaryPriorityByName = dictionaryEntries.reduce((acc, entry, index) => {
-        acc[entry.name] = index;
-        return acc;
-      }, {});
-
-      if (dictionaries.length === 0) {
-        return [];
-      }
-
-      const rawFrequencies = await invoke("getTermFrequencies", {
-        termReadingList: ${JSON.stringify(missingTermReadingList)},
-        dictionaries
-      });
-
-      if (!Array.isArray(rawFrequencies)) {
-        return [];
-      }
-
-      return rawFrequencies
-        .filter((entry) => entry && typeof entry === "object")
-        .map((entry) => ({
-          ...entry,
-          dictionaryPriority:
-            typeof entry.dictionary === "string" && dictionaryPriorityByName[entry.dictionary] !== undefined
-              ? dictionaryPriorityByName[entry.dictionary]
-              : Number.MAX_SAFE_INTEGER
-        }));
-    })();
-  `;
-
-  try {
-    const rawResult = await parserWindow.webContents.executeJavaScript(script, true);
-    const fetchedEntries = Array.isArray(rawResult)
-      ? rawResult
-          .map((entry) => toYomitanTermFrequency(entry))
-          .filter((entry): entry is YomitanTermFrequency => entry !== null)
-      : [];
-    const groupedByPair = groupFrequencyEntriesByPair(fetchedEntries);
-    const groupedByTerm = groupFrequencyEntriesByTerm(fetchedEntries);
-    const missingTerms = new Set(missingTermReadingList.map((pair) => pair.term));
     for (const pair of missingTermReadingList) {
+      if (pair.reading === null) {
+        continue;
+      }
       const key = makeTermReadingCacheKey(pair.term, pair.reading);
-      const exactEntries = groupedByPair.get(key);
+      const cachedEntries = frequencyCache.get(key);
-      const termEntries = groupedByTerm.get(pair.term) ?? [];
+      if (cachedEntries && cachedEntries.length > 0) {
-      frequencyCache.set(key, exactEntries ?? termEntries);
+        continue;
+      }
+      const fallbackEntries = frequencyCache.get(makeTermReadingCacheKey(pair.term, null));
+      if (fallbackEntries && fallbackEntries.length > 0) {
+        frequencyCache.set(key, fallbackEntries);
+      }
     }
-    const cachedResult = buildCachedResult();
-    const unmatchedEntries = fetchedEntries.filter((entry) => !missingTerms.has(entry.term.trim()));
-    return [...cachedResult, ...unmatchedEntries];
-  } catch (err) {
-    logger.error('Yomitan term frequency request failed:', (err as Error).message);
-    return buildCachedResult();
   }
+
+  const allFetchedEntries = [...fetchedEntries, ...fallbackFetchedEntries];
+  const queriedTerms = new Set(
+    [...missingTermReadingList, ...fallbackTermReadingList].map((pair) => pair.term),
+  );
+  const cachedResult = buildCachedResult();
+  const unmatchedEntries = allFetchedEntries.filter(
+    (entry) => !queriedTerms.has(entry.term.trim()),
+  );
+  return [...cachedResult, ...unmatchedEntries];
 }
 
 export async function syncYomitanDefaultAnkiServer(
   serverUrl: string,
   deps: YomitanParserRuntimeDeps,
   logger: LoggerLike,
+  options?: {
+    forceOverride?: boolean;
+  },
 ): Promise<boolean> {
   const normalizedTargetServer = serverUrl.trim();
   if (!normalizedTargetServer) {
     return false;
   }
+  const forceOverride = options?.forceOverride === true;
 
   const isReady = await ensureYomitanParserWindow(deps, logger);
   const parserWindow = deps.getYomitanParserWindow();
@@ -804,35 +886,42 @@ export async function syncYomitanDefaultAnkiServer(
         });
 
       const targetServer = ${JSON.stringify(normalizedTargetServer)};
+      const forceOverride = ${forceOverride ? 'true' : 'false'};
       const optionsFull = await invoke("optionsGetFull", undefined);
       const profiles = Array.isArray(optionsFull.profiles) ? optionsFull.profiles : [];
       if (profiles.length === 0) {
         return { updated: false, reason: "no-profiles" };
       }
 
-      const defaultProfile = profiles[0];
+      const profileCurrent = Number.isInteger(optionsFull.profileCurrent)
-      if (!defaultProfile || typeof defaultProfile !== "object") {
+        ? optionsFull.profileCurrent
+        : 0;
+      const targetProfile = profiles[profileCurrent];
+      if (!targetProfile || typeof targetProfile !== "object") {
         return { updated: false, reason: "invalid-default-profile" };
       }
 
-      defaultProfile.options = defaultProfile.options && typeof defaultProfile.options === "object"
+      targetProfile.options = targetProfile.options && typeof targetProfile.options === "object"
-        ? defaultProfile.options
+        ? targetProfile.options
         : {};
-      defaultProfile.options.anki = defaultProfile.options.anki && typeof defaultProfile.options.anki === "object"
+      targetProfile.options.anki = targetProfile.options.anki && typeof targetProfile.options.anki === "object"
-        ? defaultProfile.options.anki
+        ? targetProfile.options.anki
         : {};
 
-      const currentServerRaw = defaultProfile.options.anki.server;
+      const currentServerRaw = targetProfile.options.anki.server;
       const currentServer = typeof currentServerRaw === "string" ? currentServerRaw.trim() : "";
-      const canReplaceDefault =
+      if (currentServer === targetServer) {
-        currentServer.length === 0 || currentServer === "http://127.0.0.1:8765";
+        return { updated: false, matched: true, reason: "already-target", currentServer, targetServer };
-      if (!canReplaceDefault || currentServer === targetServer) {
+      }
-        return { updated: false, reason: "no-change", currentServer, targetServer };
+      const canReplaceCurrent =
+        forceOverride || currentServer.length === 0 || currentServer === "http://127.0.0.1:8765";
+      if (!canReplaceCurrent) {
+        return { updated: false, matched: false, reason: "blocked-existing-server", currentServer, targetServer };
       }
 
-      defaultProfile.options.anki.server = targetServer;
+      targetProfile.options.anki.server = targetServer;
       await invoke("setAllSettings", { value: optionsFull, source: "subminer" });
-      return { updated: true, currentServer, targetServer };
+      return { updated: true, matched: true, currentServer, targetServer };
     })();
   `;
 
@@ -846,7 +935,29 @@ export async function syncYomitanDefaultAnkiServer(
       logger.info?.(`Updated Yomitan default profile Anki server to ${normalizedTargetServer}`);
       return true;
     }
-    return false;
+    const matchedWithoutUpdate =
+      isObject(result) &&
+      result.updated === false &&
+      (result as { matched?: unknown }).matched === true;
+    if (matchedWithoutUpdate) {
+      return true;
+    }
+    const blockedByExistingServer =
+      isObject(result) &&
+      result.updated === false &&
+      (result as { matched?: unknown }).matched === false &&
+      typeof (result as { reason?: unknown }).reason === 'string';
+    if (blockedByExistingServer) {
+      logger.info?.(
+        `Skipped syncing Yomitan Anki server (reason=${String((result as { reason: string }).reason)})`,
+      );
+      return false;
+    }
+    const checkedWithoutUpdate =
+      typeof result === 'object' &&
+      result !== null &&
+      (result as { updated?: unknown }).updated === false;
+    return checkedWithoutUpdate;
   } catch (err) {
     logger.error('Failed to sync Yomitan default profile Anki server:', (err as Error).message);
     return false;

src/core/services/yomitan-extension-copy.ts

@@ -0,0 +1,53 @@
+import * as fs from 'fs';
+import * as path from 'path';
+
+const YOMITAN_SYNC_SCRIPT_PATHS = [
+  path.join('js', 'app', 'popup.js'),
+  path.join('js', 'display', 'popup-main.js'),
+  path.join('js', 'display', 'display.js'),
+  path.join('js', 'display', 'display-audio.js'),
+];
+
+function readManifestVersion(manifestPath: string): string | null {
+  try {
+    const parsed = JSON.parse(fs.readFileSync(manifestPath, 'utf-8')) as { version?: unknown };
+    return typeof parsed.version === 'string' ? parsed.version : null;
+  } catch {
+    return null;
+  }
+}
+
+function areFilesEqual(sourcePath: string, targetPath: string): boolean {
+  if (!fs.existsSync(sourcePath) || !fs.existsSync(targetPath)) return false;
+  try {
+    return fs.readFileSync(sourcePath).equals(fs.readFileSync(targetPath));
+  } catch {
+    return false;
+  }
+}
+
+export function shouldCopyYomitanExtension(sourceDir: string, targetDir: string): boolean {
+  if (!fs.existsSync(targetDir)) {
+    return true;
+  }
+
+  const sourceManifest = path.join(sourceDir, 'manifest.json');
+  const targetManifest = path.join(targetDir, 'manifest.json');
+  if (!fs.existsSync(sourceManifest) || !fs.existsSync(targetManifest)) {
+    return true;
+  }
+
+  const sourceVersion = readManifestVersion(sourceManifest);
+  const targetVersion = readManifestVersion(targetManifest);
+  if (sourceVersion === null || targetVersion === null || sourceVersion !== targetVersion) {
+    return true;
+  }
+
+  for (const relativePath of YOMITAN_SYNC_SCRIPT_PATHS) {
+    if (!areFilesEqual(path.join(sourceDir, relativePath), path.join(targetDir, relativePath))) {
+      return true;
+    }
+  }
+
+  return false;
+}

src/core/services/yomitan-extension-loader.test.ts

@@ -0,0 +1,52 @@
+import assert from 'node:assert/strict';
+import fs from 'node:fs';
+import os from 'node:os';
+import path from 'node:path';
+import test from 'node:test';
+
+import { shouldCopyYomitanExtension } from './yomitan-extension-copy';
+
+function writeFile(filePath: string, content: string): void {
+  fs.mkdirSync(path.dirname(filePath), { recursive: true });
+  fs.writeFileSync(filePath, content, 'utf-8');
+}
+
+test('shouldCopyYomitanExtension detects popup runtime script drift', () => {
+  const tempRoot = fs.mkdtempSync(path.join(os.tmpdir(), 'yomitan-copy-test-'));
+  const sourceDir = path.join(tempRoot, 'source');
+  const targetDir = path.join(tempRoot, 'target');
+
+  writeFile(path.join(sourceDir, 'manifest.json'), JSON.stringify({ version: '1.0.0' }));
+  writeFile(path.join(targetDir, 'manifest.json'), JSON.stringify({ version: '1.0.0' }));
+
+  writeFile(path.join(sourceDir, 'js', 'app', 'popup.js'), 'same-popup-script');
+  writeFile(path.join(targetDir, 'js', 'app', 'popup.js'), 'same-popup-script');
+
+  writeFile(path.join(sourceDir, 'js', 'display', 'popup-main.js'), 'source-popup-main');
+  writeFile(path.join(targetDir, 'js', 'display', 'popup-main.js'), 'target-popup-main');
+
+  assert.equal(shouldCopyYomitanExtension(sourceDir, targetDir), true);
+});
+
+test('shouldCopyYomitanExtension skips copy when versions and watched scripts match', () => {
+  const tempRoot = fs.mkdtempSync(path.join(os.tmpdir(), 'yomitan-copy-test-'));
+  const sourceDir = path.join(tempRoot, 'source');
+  const targetDir = path.join(tempRoot, 'target');
+
+  writeFile(path.join(sourceDir, 'manifest.json'), JSON.stringify({ version: '1.0.0' }));
+  writeFile(path.join(targetDir, 'manifest.json'), JSON.stringify({ version: '1.0.0' }));
+
+  writeFile(path.join(sourceDir, 'js', 'app', 'popup.js'), 'same-popup-script');
+  writeFile(path.join(targetDir, 'js', 'app', 'popup.js'), 'same-popup-script');
+
+  writeFile(path.join(sourceDir, 'js', 'display', 'popup-main.js'), 'same-popup-main');
+  writeFile(path.join(targetDir, 'js', 'display', 'popup-main.js'), 'same-popup-main');
+
+  writeFile(path.join(sourceDir, 'js', 'display', 'display.js'), 'same-display');
+  writeFile(path.join(targetDir, 'js', 'display', 'display.js'), 'same-display');
+
+  writeFile(path.join(sourceDir, 'js', 'display', 'display-audio.js'), 'same-display-audio');
+  writeFile(path.join(targetDir, 'js', 'display', 'display-audio.js'), 'same-display-audio');
+
+  assert.equal(shouldCopyYomitanExtension(sourceDir, targetDir), false);
+});

src/core/services/yomitan-extension-loader.ts

@@ -2,6 +2,7 @@ import { BrowserWindow, Extension, session } from 'electron';
 import * as fs from 'fs';
 import * as path from 'path';
 import { createLogger } from '../../logger';
+import { shouldCopyYomitanExtension } from './yomitan-extension-copy';
 
 const logger = createLogger('main:yomitan-extension-loader');
 
@@ -22,27 +23,7 @@ function ensureExtensionCopy(sourceDir: string, userDataPath: string): string {
   const extensionsRoot = path.join(userDataPath, 'extensions');
   const targetDir = path.join(extensionsRoot, 'yomitan');
 
-  const sourceManifest = path.join(sourceDir, 'manifest.json');
+  const shouldCopy = shouldCopyYomitanExtension(sourceDir, targetDir);
-  const targetManifest = path.join(targetDir, 'manifest.json');
-
-  let shouldCopy = !fs.existsSync(targetDir);
-  if (!shouldCopy && fs.existsSync(sourceManifest) && fs.existsSync(targetManifest)) {
-    try {
-      const sourceVersion = (
-        JSON.parse(fs.readFileSync(sourceManifest, 'utf-8')) as {
-          version: string;
-        }
-      ).version;
-      const targetVersion = (
-        JSON.parse(fs.readFileSync(targetManifest, 'utf-8')) as {
-          version: string;
-        }
-      ).version;
-      shouldCopy = sourceVersion !== targetVersion;
-    } catch {
-      shouldCopy = true;
-    }
-  }
 
   if (shouldCopy) {
     fs.mkdirSync(extensionsRoot, { recursive: true });

src/main-entry-runtime.test.ts

@@ -33,7 +33,13 @@ test('sanitizeBackgroundEnv marks background child and keeps warning suppression
 
 test('shouldDetachBackgroundLaunch only for first background invocation', () => {
   assert.equal(shouldDetachBackgroundLaunch(['--background'], {}), true);
-  assert.equal(shouldDetachBackgroundLaunch(['--background'], { SUBMINER_BACKGROUND_CHILD: '1' }), false);
+  assert.equal(
-  assert.equal(shouldDetachBackgroundLaunch(['--background'], { ELECTRON_RUN_AS_NODE: '1' }), false);
+    shouldDetachBackgroundLaunch(['--background'], { SUBMINER_BACKGROUND_CHILD: '1' }),
+    false,
+  );
+  assert.equal(
+    shouldDetachBackgroundLaunch(['--background'], { ELECTRON_RUN_AS_NODE: '1' }),
+    false,
+  );
   assert.equal(shouldDetachBackgroundLaunch(['--start'], {}), false);
 });

src/main.ts

@@ -331,6 +331,7 @@ import {
   copyCurrentSubtitle as copyCurrentSubtitleCore,
   createConfigHotReloadRuntime,
   createDiscordPresenceService,
+  createShiftSubtitleDelayToAdjacentCueHandler,
   createFieldGroupingOverlayRuntime,
   createOverlayContentMeasurementStore,
   createOverlayManager,
@@ -853,21 +854,36 @@ const subsyncRuntime = createMainSubsyncRuntime(buildMainSubsyncRuntimeMainDepsH
 let autoPlayReadySignalMediaPath: string | null = null;
 let autoPlayReadySignalGeneration = 0;
 
-function maybeSignalPluginAutoplayReady(payload: SubtitleData): void {
+function maybeSignalPluginAutoplayReady(
+  payload: SubtitleData,
+  options?: { forceWhilePaused?: boolean },
+): void {
   if (!payload.text.trim()) {
     return;
   }
-  const mediaPath = appState.currentMediaPath;
+  const mediaPath =
-  if (!mediaPath) {
+    appState.currentMediaPath?.trim() ||
+    appState.mpvClient?.currentVideoPath?.trim() ||
+    '__unknown__';
+  const duplicateMediaSignal = autoPlayReadySignalMediaPath === mediaPath;
+  const allowDuplicateWhilePaused =
+    options?.forceWhilePaused === true && appState.playbackPaused !== false;
+  if (duplicateMediaSignal && !allowDuplicateWhilePaused) {
     return;
   }
-  if (autoPlayReadySignalMediaPath === mediaPath) {
+  const signalPluginAutoplayReady = (): void => {
+    logger.debug(`[autoplay-ready] signaling mpv for media: ${mediaPath}`);
+    sendMpvCommandRuntime(appState.mpvClient, ['script-message', 'subminer-autoplay-ready']);
+  };
+  if (duplicateMediaSignal && allowDuplicateWhilePaused) {
+    // Keep re-notifying the plugin while paused (for startup visibility sync), but
+    // do not run local unpause fallback on duplicates to avoid resuming user-paused playback.
+    signalPluginAutoplayReady();
     return;
   }
   autoPlayReadySignalMediaPath = mediaPath;
   const playbackGeneration = ++autoPlayReadySignalGeneration;
-  logger.debug(`[autoplay-ready] signaling mpv for media: ${mediaPath}`);
+  signalPluginAutoplayReady();
-  sendMpvCommandRuntime(appState.mpvClient, ['script-message', 'subminer-autoplay-ready']);
   const isPlaybackPaused = async (client: {
     requestProperty: (property: string) => Promise<unknown>;
   }): Promise<boolean> => {
@@ -882,7 +898,9 @@ function maybeSignalPluginAutoplayReady(payload: SubtitleData): void {
       if (typeof pauseProperty === 'number') {
         return pauseProperty !== 0;
       }
-      logger.debug(`[autoplay-ready] unrecognized pause property for media ${mediaPath}: ${String(pauseProperty)}`);
+      logger.debug(
+        `[autoplay-ready] unrecognized pause property for media ${mediaPath}: ${String(pauseProperty)}`,
+      );
     } catch (error) {
       logger.debug(
         `[autoplay-ready] failed to read pause property for media ${mediaPath}: ${(error as Error).message}`,
@@ -891,55 +909,52 @@ function maybeSignalPluginAutoplayReady(payload: SubtitleData): void {
     return true;
   };
 
-  // Fallback: unpause directly in case plugin readiness handler is unavailable/outdated.
+  // Fallback: repeatedly try to release pause for a short window in case startup
-  void (async () => {
+  // gate arming and tokenization-ready signal arrive out of order.
-    const mpvClient = appState.mpvClient;
+  const maxReleaseAttempts = options?.forceWhilePaused === true ? 14 : 3;
-    if (!mpvClient?.connected) {
+  const releaseRetryDelayMs = 200;
-      logger.debug('[autoplay-ready] skipped unpause fallback; mpv not connected');
+  const attemptRelease = (attempt: number): void => {
-      return;
+    void (async () => {
-    }
+      if (
+        autoPlayReadySignalMediaPath !== mediaPath ||
+        playbackGeneration !== autoPlayReadySignalGeneration
+      ) {
+        return;
+      }
 
-    const shouldUnpause = await isPlaybackPaused(mpvClient);
+      const mpvClient = appState.mpvClient;
-    logger.debug(`[autoplay-ready] mpv paused before fallback for ${mediaPath}: ${shouldUnpause}`);
+      if (!mpvClient?.connected) {
-
+        if (attempt < maxReleaseAttempts) {
-    if (!shouldUnpause) {
+          setTimeout(() => attemptRelease(attempt + 1), releaseRetryDelayMs);
-      logger.debug('[autoplay-ready] mpv already playing; no fallback unpause needed');
-      return;
-    }
-
-    mpvClient.send({ command: ['set_property', 'pause', false] });
-    setTimeout(() => {
-      void (async () => {
-        if (
-          autoPlayReadySignalMediaPath !== mediaPath ||
-          playbackGeneration !== autoPlayReadySignalGeneration
-        ) {
-          return;
         }
+        return;
+      }
 
-        const followupClient = appState.mpvClient;
+      const shouldUnpause = await isPlaybackPaused(mpvClient);
-        if (!followupClient?.connected) {
+      logger.debug(
-          return;
+        `[autoplay-ready] mpv paused before fallback attempt ${attempt} for ${mediaPath}: ${shouldUnpause}`,
+      );
+      if (!shouldUnpause) {
+        if (attempt === 0) {
+          logger.debug('[autoplay-ready] mpv already playing; no fallback unpause needed');
         }
+        return;
+      }
 
-        const shouldUnpauseFollowup = await isPlaybackPaused(followupClient);
+      signalPluginAutoplayReady();
-        if (!shouldUnpauseFollowup) {
+      mpvClient.send({ command: ['set_property', 'pause', false] });
-          return;
+      if (attempt < maxReleaseAttempts) {
-        }
+        setTimeout(() => attemptRelease(attempt + 1), releaseRetryDelayMs);
-        followupClient.send({ command: ['set_property', 'pause', false] });
+      }
-      })();
+    })();
-    }, 500);
+  };
-    logger.debug('[autoplay-ready] issued direct mpv unpause fallback');
+  attemptRelease(0);
-  })();
 }
 
 let appTray: Tray | null = null;
 const buildSubtitleProcessingControllerMainDepsHandler =
   createBuildSubtitleProcessingControllerMainDepsHandler({
     tokenizeSubtitle: async (text: string) => {
-      if (getOverlayWindows().length === 0 && !subtitleWsService.hasClients()) {
-        return null;
-      }
       return await tokenizeSubtitle(text);
     },
     emitSubtitle: (payload) => {
@@ -950,7 +965,6 @@ const buildSubtitleProcessingControllerMainDepsHandler =
         topX: getResolvedConfig().subtitleStyle.frequencyDictionary.topX,
         mode: getResolvedConfig().subtitleStyle.frequencyDictionary.mode,
       });
-      maybeSignalPluginAutoplayReady(payload);
     },
     logDebug: (message) => {
       logger.debug(`[subtitle-processing] ${message}`);
@@ -1353,6 +1367,23 @@ function getRuntimeBooleanOption(
   return typeof value === 'boolean' ? value : fallback;
 }
 
+function shouldInitializeMecabForAnnotations(): boolean {
+  const config = getResolvedConfig();
+  const nPlusOneEnabled = getRuntimeBooleanOption(
+    'subtitle.annotation.nPlusOne',
+    config.ankiConnect.nPlusOne.highlightEnabled,
+  );
+  const jlptEnabled = getRuntimeBooleanOption(
+    'subtitle.annotation.jlpt',
+    config.subtitleStyle.enableJlpt,
+  );
+  const frequencyEnabled = getRuntimeBooleanOption(
+    'subtitle.annotation.frequency',
+    config.subtitleStyle.frequencyDictionary.enabled,
+  );
+  return nPlusOneEnabled || jlptEnabled || frequencyEnabled;
+}
+
 const {
   getResolvedJellyfinConfig,
   getJellyfinClientInfo,
@@ -2320,9 +2351,7 @@ const {
       ensureImmersionTrackerStarted();
     },
     updateCurrentMediaPath: (path) => {
-      if (appState.currentMediaPath !== path) {
+      autoPlayReadySignalMediaPath = null;
-        autoPlayReadySignalMediaPath = null;
-      }
       if (path) {
         ensureImmersionTrackerStarted();
       }
@@ -2428,6 +2457,9 @@ const {
       getFrequencyRank: (text) => appState.frequencyRankLookup(text),
       getYomitanGroupDebugEnabled: () => appState.overlayDebugVisualizationEnabled,
       getMecabTokenizer: () => appState.mecabTokenizer,
+      onTokenizationReady: (text) => {
+        maybeSignalPluginAutoplayReady({ text, tokens: null }, { forceWhilePaused: true });
+      },
     },
     createTokenizerRuntimeDeps: (deps) =>
       createTokenizerDepsRuntime(deps as Parameters<typeof createTokenizerDepsRuntime>[0]),
@@ -2469,7 +2501,10 @@ const {
         if (startupWarmups.lowPowerMode) {
           return false;
         }
-        return startupWarmups.mecab;
+        if (!startupWarmups.mecab) {
+          return false;
+        }
+        return shouldInitializeMecabForAnnotations();
       },
       shouldWarmupYomitanExtension: () => getResolvedConfig().startupWarmups.yomitanExtension,
       shouldWarmupSubtitleDictionaries: () => {
@@ -2609,7 +2644,7 @@ async function syncYomitanDefaultProfileAnkiServer(): Promise<void> {
     return;
   }
 
-  const updated = await syncYomitanDefaultAnkiServerCore(
+  const synced = await syncYomitanDefaultAnkiServerCore(
     targetUrl,
     {
       getYomitanExt: () => appState.yomitanExt,
@@ -2634,10 +2669,12 @@ async function syncYomitanDefaultProfileAnkiServer(): Promise<void> {
         logger.info(message, ...args);
       },
     },
+    {
+      forceOverride: getResolvedConfig().ankiConnect.proxy?.enabled === true,
+    },
   );
 
-  if (updated) {
+  if (synced) {
-    logger.info(`Yomitan default profile Anki server set to ${targetUrl}`);
     lastSyncedYomitanAnkiServer = targetUrl;
   }
 }
@@ -2925,6 +2962,30 @@ const appendClipboardVideoToQueueHandler = createAppendClipboardVideoToQueueHand
   appendClipboardVideoToQueueMainDeps,
 );
 
+const shiftSubtitleDelayToAdjacentCueHandler = createShiftSubtitleDelayToAdjacentCueHandler({
+  getMpvClient: () => appState.mpvClient,
+  loadSubtitleSourceText: async (source) => {
+    if (/^https?:\/\//i.test(source)) {
+      const controller = new AbortController();
+      const timeoutId = setTimeout(() => controller.abort(), 4000);
+      try {
+        const response = await fetch(source, { signal: controller.signal });
+        if (!response.ok) {
+          throw new Error(`Failed to download subtitle source (${response.status})`);
+        }
+        return await response.text();
+      } finally {
+        clearTimeout(timeoutId);
+      }
+    }
+
+    const filePath = source.startsWith('file://') ? decodeURI(new URL(source).pathname) : source;
+    return fs.promises.readFile(filePath, 'utf8');
+  },
+  sendMpvCommand: (command) => sendMpvCommandRuntime(appState.mpvClient, command),
+  showMpvOsd: (text) => showMpvOsd(text),
+});
+
 const {
   handleMpvCommandFromIpc: handleMpvCommandFromIpcHandler,
   runSubsyncManualFromIpc: runSubsyncManualFromIpcHandler,
@@ -2945,6 +3006,8 @@ const {
     showMpvOsd: (text: string) => showMpvOsd(text),
     replayCurrentSubtitle: () => replayCurrentSubtitleRuntime(appState.mpvClient),
     playNextSubtitle: () => playNextSubtitleRuntime(appState.mpvClient),
+    shiftSubDelayToAdjacentSubtitle: (direction) =>
+      shiftSubtitleDelayToAdjacentCueHandler(direction),
     sendMpvCommand: (rawCommand: (string | number)[]) =>
       sendMpvCommandRuntime(appState.mpvClient, rawCommand),
     isMpvConnected: () => Boolean(appState.mpvClient && appState.mpvClient.connected),

src/main/dependencies.ts

@@ -180,6 +180,7 @@ export interface MpvCommandRuntimeServiceDepsParams {
   showMpvOsd: HandleMpvCommandFromIpcOptions['showMpvOsd'];
   mpvReplaySubtitle: HandleMpvCommandFromIpcOptions['mpvReplaySubtitle'];
   mpvPlayNextSubtitle: HandleMpvCommandFromIpcOptions['mpvPlayNextSubtitle'];
+  shiftSubDelayToAdjacentSubtitle: HandleMpvCommandFromIpcOptions['shiftSubDelayToAdjacentSubtitle'];
   mpvSendCommand: HandleMpvCommandFromIpcOptions['mpvSendCommand'];
   isMpvConnected: HandleMpvCommandFromIpcOptions['isMpvConnected'];
   hasRuntimeOptionsManager: HandleMpvCommandFromIpcOptions['hasRuntimeOptionsManager'];
@@ -328,6 +329,7 @@ export function createMpvCommandRuntimeServiceDeps(
     showMpvOsd: params.showMpvOsd,
     mpvReplaySubtitle: params.mpvReplaySubtitle,
     mpvPlayNextSubtitle: params.mpvPlayNextSubtitle,
+    shiftSubDelayToAdjacentSubtitle: params.shiftSubDelayToAdjacentSubtitle,
     mpvSendCommand: params.mpvSendCommand,
     isMpvConnected: params.isMpvConnected,
     hasRuntimeOptionsManager: params.hasRuntimeOptionsManager,

src/main/ipc-mpv-command.ts

@@ -10,6 +10,7 @@ export interface MpvCommandFromIpcRuntimeDeps {
   showMpvOsd: (text: string) => void;
   replayCurrentSubtitle: () => void;
   playNextSubtitle: () => void;
+  shiftSubDelayToAdjacentSubtitle: (direction: 'next' | 'previous') => Promise<void>;
   sendMpvCommand: (command: (string | number)[]) => void;
   isMpvConnected: () => boolean;
   hasRuntimeOptionsManager: () => boolean;
@@ -29,6 +30,8 @@ export function handleMpvCommandFromIpcRuntime(
       showMpvOsd: deps.showMpvOsd,
       mpvReplaySubtitle: deps.replayCurrentSubtitle,
       mpvPlayNextSubtitle: deps.playNextSubtitle,
+      shiftSubDelayToAdjacentSubtitle: (direction) =>
+        deps.shiftSubDelayToAdjacentSubtitle(direction),
       mpvSendCommand: deps.sendMpvCommand,
       isMpvConnected: deps.isMpvConnected,
       hasRuntimeOptionsManager: deps.hasRuntimeOptionsManager,

src/main/runtime/composers/ipc-runtime-composer.test.ts

@@ -14,6 +14,7 @@ test('composeIpcRuntimeHandlers returns callable IPC handlers and registration b
       showMpvOsd: () => {},
       replayCurrentSubtitle: () => {},
       playNextSubtitle: () => {},
+      shiftSubDelayToAdjacentSubtitle: async () => {},
       sendMpvCommand: () => {},
       isMpvConnected: () => false,
       hasRuntimeOptionsManager: () => true,

src/main/runtime/composers/mpv-runtime-composer.test.ts

@@ -22,6 +22,14 @@ const BASE_METRICS: MpvSubtitleRenderMetrics = {
   osdDimensions: null,
 };
 
+function createDeferred(): { promise: Promise<void>; resolve: () => void } {
+  let resolve!: () => void;
+  const promise = new Promise<void>((nextResolve) => {
+    resolve = nextResolve;
+  });
+  return { promise, resolve };
+}
+
 test('composeMpvRuntimeHandlers returns callable handlers and forwards to injected deps', async () => {
   const calls: string[] = [];
   let started = false;
@@ -236,3 +244,559 @@ test('composeMpvRuntimeHandlers returns callable handlers and forwards to inject
   assert.ok(calls.includes('warmup-yomitan'));
   assert.ok(calls.indexOf('create-mecab') < calls.indexOf('set-started:true'));
 });
+
+test('composeMpvRuntimeHandlers skips MeCab warmup when all POS-dependent annotations are disabled', async () => {
+  const calls: string[] = [];
+  let mecabTokenizer: { id: string } | null = null;
+
+  class FakeMpvClient {
+    connected = false;
+    constructor(
+      public socketPath: string,
+      public options: unknown,
+    ) {}
+    on(): void {}
+    connect(): void {
+      this.connected = true;
+    }
+  }
+
+  const composed = composeMpvRuntimeHandlers<
+    FakeMpvClient,
+    { isKnownWord: (text: string) => boolean },
+    { text: string }
+  >({
+    bindMpvMainEventHandlersMainDeps: {
+      appState: {
+        initialArgs: null,
+        overlayRuntimeInitialized: true,
+        mpvClient: null,
+        immersionTracker: null,
+        subtitleTimingTracker: null,
+        currentSubText: '',
+        currentSubAssText: '',
+        playbackPaused: null,
+        previousSecondarySubVisibility: null,
+      },
+      getQuitOnDisconnectArmed: () => false,
+      scheduleQuitCheck: () => {},
+      quitApp: () => {},
+      reportJellyfinRemoteStopped: () => {},
+      syncOverlayMpvSubtitleSuppression: () => {},
+      maybeRunAnilistPostWatchUpdate: async () => {},
+      logSubtitleTimingError: () => {},
+      broadcastToOverlayWindows: () => {},
+      onSubtitleChange: () => {},
+      refreshDiscordPresence: () => {},
+      ensureImmersionTrackerInitialized: () => {},
+      updateCurrentMediaPath: () => {},
+      restoreMpvSubVisibility: () => {},
+      getCurrentAnilistMediaKey: () => null,
+      resetAnilistMediaTracking: () => {},
+      maybeProbeAnilistDuration: () => {},
+      ensureAnilistMediaGuess: () => {},
+      syncImmersionMediaState: () => {},
+      updateCurrentMediaTitle: () => {},
+      resetAnilistMediaGuessState: () => {},
+      reportJellyfinRemoteProgress: () => {},
+      updateSubtitleRenderMetrics: () => {},
+    },
+    mpvClientRuntimeServiceFactoryMainDeps: {
+      createClient: FakeMpvClient,
+      getSocketPath: () => '/tmp/mpv.sock',
+      getResolvedConfig: () => ({ auto_start_overlay: false }),
+      isAutoStartOverlayEnabled: () => true,
+      setOverlayVisible: () => {},
+      isVisibleOverlayVisible: () => false,
+      getReconnectTimer: () => null,
+      setReconnectTimer: () => {},
+    },
+    updateMpvSubtitleRenderMetricsMainDeps: {
+      getCurrentMetrics: () => BASE_METRICS,
+      setCurrentMetrics: () => {},
+      applyPatch: (current, patch) => ({ next: { ...current, ...patch }, changed: true }),
+      broadcastMetrics: () => {},
+    },
+    tokenizer: {
+      buildTokenizerDepsMainDeps: {
+        getYomitanExt: () => null,
+        getYomitanParserWindow: () => null,
+        setYomitanParserWindow: () => {},
+        getYomitanParserReadyPromise: () => null,
+        setYomitanParserReadyPromise: () => {},
+        getYomitanParserInitPromise: () => null,
+        setYomitanParserInitPromise: () => {},
+        isKnownWord: () => false,
+        recordLookup: () => {},
+        getKnownWordMatchMode: () => 'headword',
+        getNPlusOneEnabled: () => false,
+        getMinSentenceWordsForNPlusOne: () => 3,
+        getJlptLevel: () => null,
+        getJlptEnabled: () => false,
+        getFrequencyDictionaryEnabled: () => false,
+        getFrequencyDictionaryMatchMode: () => 'headword',
+        getFrequencyRank: () => null,
+        getYomitanGroupDebugEnabled: () => false,
+        getMecabTokenizer: () => null,
+      },
+      createTokenizerRuntimeDeps: () => ({ isKnownWord: () => false }),
+      tokenizeSubtitle: async (text) => ({ text }),
+      createMecabTokenizerAndCheckMainDeps: {
+        getMecabTokenizer: () => mecabTokenizer,
+        setMecabTokenizer: (next) => {
+          mecabTokenizer = next as { id: string };
+          calls.push('set-mecab');
+        },
+        createMecabTokenizer: () => {
+          calls.push('create-mecab');
+          return { id: 'mecab' };
+        },
+        checkAvailability: async () => {
+          calls.push('check-mecab');
+        },
+      },
+      prewarmSubtitleDictionariesMainDeps: {
+        ensureJlptDictionaryLookup: async () => {},
+        ensureFrequencyDictionaryLookup: async () => {},
+      },
+    },
+    warmups: {
+      launchBackgroundWarmupTaskMainDeps: {
+        now: () => 0,
+        logDebug: () => {},
+        logWarn: () => {},
+      },
+      startBackgroundWarmupsMainDeps: {
+        getStarted: () => false,
+        setStarted: () => {},
+        isTexthookerOnlyMode: () => false,
+        ensureYomitanExtensionLoaded: async () => {},
+        shouldWarmupMecab: () => false,
+        shouldWarmupYomitanExtension: () => false,
+        shouldWarmupSubtitleDictionaries: () => false,
+        shouldWarmupJellyfinRemoteSession: () => false,
+        shouldAutoConnectJellyfinRemote: () => false,
+        startJellyfinRemoteSession: async () => {},
+      },
+    },
+  });
+
+  await composed.startTokenizationWarmups();
+
+  assert.deepEqual(calls, []);
+});
+
+test('composeMpvRuntimeHandlers runs tokenization warmup once across sequential tokenize calls', async () => {
+  let yomitanWarmupCalls = 0;
+  let prewarmJlptCalls = 0;
+  let prewarmFrequencyCalls = 0;
+  const tokenizeCalls: string[] = [];
+
+  const composed = composeMpvRuntimeHandlers<
+    { connect: () => void; on: () => void },
+    { isKnownWord: () => boolean },
+    { text: string }
+  >({
+    bindMpvMainEventHandlersMainDeps: {
+      appState: {
+        initialArgs: null,
+        overlayRuntimeInitialized: true,
+        mpvClient: null,
+        immersionTracker: null,
+        subtitleTimingTracker: null,
+        currentSubText: '',
+        currentSubAssText: '',
+        playbackPaused: null,
+        previousSecondarySubVisibility: null,
+      },
+      getQuitOnDisconnectArmed: () => false,
+      scheduleQuitCheck: () => {},
+      quitApp: () => {},
+      reportJellyfinRemoteStopped: () => {},
+      syncOverlayMpvSubtitleSuppression: () => {},
+      maybeRunAnilistPostWatchUpdate: async () => {},
+      logSubtitleTimingError: () => {},
+      broadcastToOverlayWindows: () => {},
+      onSubtitleChange: () => {},
+      refreshDiscordPresence: () => {},
+      ensureImmersionTrackerInitialized: () => {},
+      updateCurrentMediaPath: () => {},
+      restoreMpvSubVisibility: () => {},
+      getCurrentAnilistMediaKey: () => null,
+      resetAnilistMediaTracking: () => {},
+      maybeProbeAnilistDuration: () => {},
+      ensureAnilistMediaGuess: () => {},
+      syncImmersionMediaState: () => {},
+      updateCurrentMediaTitle: () => {},
+      resetAnilistMediaGuessState: () => {},
+      reportJellyfinRemoteProgress: () => {},
+      updateSubtitleRenderMetrics: () => {},
+    },
+    mpvClientRuntimeServiceFactoryMainDeps: {
+      createClient: class {
+        connect(): void {}
+        on(): void {}
+      },
+      getSocketPath: () => '/tmp/mpv.sock',
+      getResolvedConfig: () => ({ auto_start_overlay: false }),
+      isAutoStartOverlayEnabled: () => false,
+      setOverlayVisible: () => {},
+      isVisibleOverlayVisible: () => false,
+      getReconnectTimer: () => null,
+      setReconnectTimer: () => {},
+    },
+    updateMpvSubtitleRenderMetricsMainDeps: {
+      getCurrentMetrics: () => BASE_METRICS,
+      setCurrentMetrics: () => {},
+      applyPatch: (current, patch) => ({ next: { ...current, ...patch }, changed: true }),
+      broadcastMetrics: () => {},
+    },
+    tokenizer: {
+      buildTokenizerDepsMainDeps: {
+        getYomitanExt: () => null,
+        getYomitanParserWindow: () => null,
+        setYomitanParserWindow: () => {},
+        getYomitanParserReadyPromise: () => null,
+        setYomitanParserReadyPromise: () => {},
+        getYomitanParserInitPromise: () => null,
+        setYomitanParserInitPromise: () => {},
+        isKnownWord: () => false,
+        recordLookup: () => {},
+        getKnownWordMatchMode: () => 'headword',
+        getNPlusOneEnabled: () => false,
+        getMinSentenceWordsForNPlusOne: () => 3,
+        getJlptLevel: () => null,
+        getJlptEnabled: () => false,
+        getFrequencyDictionaryEnabled: () => false,
+        getFrequencyDictionaryMatchMode: () => 'headword',
+        getFrequencyRank: () => null,
+        getYomitanGroupDebugEnabled: () => false,
+        getMecabTokenizer: () => null,
+      },
+      createTokenizerRuntimeDeps: () => ({ isKnownWord: () => false }),
+      tokenizeSubtitle: async (text) => {
+        tokenizeCalls.push(text);
+        return { text };
+      },
+      createMecabTokenizerAndCheckMainDeps: {
+        getMecabTokenizer: () => null,
+        setMecabTokenizer: () => {},
+        createMecabTokenizer: () => ({ id: 'mecab' }),
+        checkAvailability: async () => {},
+      },
+      prewarmSubtitleDictionariesMainDeps: {
+        ensureJlptDictionaryLookup: async () => {
+          prewarmJlptCalls += 1;
+        },
+        ensureFrequencyDictionaryLookup: async () => {
+          prewarmFrequencyCalls += 1;
+        },
+      },
+    },
+    warmups: {
+      launchBackgroundWarmupTaskMainDeps: {
+        now: () => 0,
+        logDebug: () => {},
+        logWarn: () => {},
+      },
+      startBackgroundWarmupsMainDeps: {
+        getStarted: () => false,
+        setStarted: () => {},
+        isTexthookerOnlyMode: () => false,
+        ensureYomitanExtensionLoaded: async () => {
+          yomitanWarmupCalls += 1;
+        },
+        shouldWarmupMecab: () => false,
+        shouldWarmupYomitanExtension: () => false,
+        shouldWarmupSubtitleDictionaries: () => false,
+        shouldWarmupJellyfinRemoteSession: () => false,
+        shouldAutoConnectJellyfinRemote: () => false,
+        startJellyfinRemoteSession: async () => {},
+      },
+    },
+  });
+
+  await composed.tokenizeSubtitle('first');
+  await composed.tokenizeSubtitle('second');
+
+  assert.deepEqual(tokenizeCalls, ['first', 'second']);
+  assert.equal(yomitanWarmupCalls, 1);
+  assert.equal(prewarmJlptCalls, 0);
+  assert.equal(prewarmFrequencyCalls, 0);
+});
+
+test('composeMpvRuntimeHandlers does not block first tokenization on dictionary or MeCab warmup', async () => {
+  const jlptDeferred = createDeferred();
+  const frequencyDeferred = createDeferred();
+  const mecabDeferred = createDeferred();
+  let tokenizeResolved = false;
+
+  const composed = composeMpvRuntimeHandlers<
+    { connect: () => void; on: () => void },
+    { isKnownWord: () => boolean },
+    { text: string }
+  >({
+    bindMpvMainEventHandlersMainDeps: {
+      appState: {
+        initialArgs: null,
+        overlayRuntimeInitialized: true,
+        mpvClient: null,
+        immersionTracker: null,
+        subtitleTimingTracker: null,
+        currentSubText: '',
+        currentSubAssText: '',
+        playbackPaused: null,
+        previousSecondarySubVisibility: null,
+      },
+      getQuitOnDisconnectArmed: () => false,
+      scheduleQuitCheck: () => {},
+      quitApp: () => {},
+      reportJellyfinRemoteStopped: () => {},
+      syncOverlayMpvSubtitleSuppression: () => {},
+      maybeRunAnilistPostWatchUpdate: async () => {},
+      logSubtitleTimingError: () => {},
+      broadcastToOverlayWindows: () => {},
+      onSubtitleChange: () => {},
+      refreshDiscordPresence: () => {},
+      ensureImmersionTrackerInitialized: () => {},
+      updateCurrentMediaPath: () => {},
+      restoreMpvSubVisibility: () => {},
+      getCurrentAnilistMediaKey: () => null,
+      resetAnilistMediaTracking: () => {},
+      maybeProbeAnilistDuration: () => {},
+      ensureAnilistMediaGuess: () => {},
+      syncImmersionMediaState: () => {},
+      updateCurrentMediaTitle: () => {},
+      resetAnilistMediaGuessState: () => {},
+      reportJellyfinRemoteProgress: () => {},
+      updateSubtitleRenderMetrics: () => {},
+    },
+    mpvClientRuntimeServiceFactoryMainDeps: {
+      createClient: class {
+        connect(): void {}
+        on(): void {}
+      },
+      getSocketPath: () => '/tmp/mpv.sock',
+      getResolvedConfig: () => ({ auto_start_overlay: false }),
+      isAutoStartOverlayEnabled: () => false,
+      setOverlayVisible: () => {},
+      isVisibleOverlayVisible: () => false,
+      getReconnectTimer: () => null,
+      setReconnectTimer: () => {},
+    },
+    updateMpvSubtitleRenderMetricsMainDeps: {
+      getCurrentMetrics: () => BASE_METRICS,
+      setCurrentMetrics: () => {},
+      applyPatch: (current, patch) => ({ next: { ...current, ...patch }, changed: true }),
+      broadcastMetrics: () => {},
+    },
+    tokenizer: {
+      buildTokenizerDepsMainDeps: {
+        getYomitanExt: () => null,
+        getYomitanParserWindow: () => null,
+        setYomitanParserWindow: () => {},
+        getYomitanParserReadyPromise: () => null,
+        setYomitanParserReadyPromise: () => {},
+        getYomitanParserInitPromise: () => null,
+        setYomitanParserInitPromise: () => {},
+        isKnownWord: () => false,
+        recordLookup: () => {},
+        getKnownWordMatchMode: () => 'headword',
+        getNPlusOneEnabled: () => true,
+        getMinSentenceWordsForNPlusOne: () => 3,
+        getJlptLevel: () => null,
+        getJlptEnabled: () => true,
+        getFrequencyDictionaryEnabled: () => true,
+        getFrequencyDictionaryMatchMode: () => 'headword',
+        getFrequencyRank: () => null,
+        getYomitanGroupDebugEnabled: () => false,
+        getMecabTokenizer: () => null,
+      },
+      createTokenizerRuntimeDeps: () => ({ isKnownWord: () => false }),
+      tokenizeSubtitle: async (text) => ({ text }),
+      createMecabTokenizerAndCheckMainDeps: {
+        getMecabTokenizer: () => null,
+        setMecabTokenizer: () => {},
+        createMecabTokenizer: () => ({ id: 'mecab' }),
+        checkAvailability: async () => mecabDeferred.promise,
+      },
+      prewarmSubtitleDictionariesMainDeps: {
+        ensureJlptDictionaryLookup: async () => jlptDeferred.promise,
+        ensureFrequencyDictionaryLookup: async () => frequencyDeferred.promise,
+      },
+    },
+    warmups: {
+      launchBackgroundWarmupTaskMainDeps: {
+        now: () => 0,
+        logDebug: () => {},
+        logWarn: () => {},
+      },
+      startBackgroundWarmupsMainDeps: {
+        getStarted: () => false,
+        setStarted: () => {},
+        isTexthookerOnlyMode: () => false,
+        ensureYomitanExtensionLoaded: async () => undefined,
+        shouldWarmupMecab: () => false,
+        shouldWarmupYomitanExtension: () => false,
+        shouldWarmupSubtitleDictionaries: () => false,
+        shouldWarmupJellyfinRemoteSession: () => false,
+        shouldAutoConnectJellyfinRemote: () => false,
+        startJellyfinRemoteSession: async () => {},
+      },
+    },
+  });
+
+  const tokenizePromise = composed.tokenizeSubtitle('first line').then(() => {
+    tokenizeResolved = true;
+  });
+  await new Promise<void>((resolve) => setImmediate(resolve));
+  assert.equal(tokenizeResolved, true);
+
+  jlptDeferred.resolve();
+  frequencyDeferred.resolve();
+  mecabDeferred.resolve();
+  await tokenizePromise;
+  await composed.startTokenizationWarmups();
+});
+
+test('composeMpvRuntimeHandlers shows annotation loading OSD after tokenization-ready when dictionary warmup is still pending', async () => {
+  const jlptDeferred = createDeferred();
+  const frequencyDeferred = createDeferred();
+  const osdMessages: string[] = [];
+
+  const composed = composeMpvRuntimeHandlers<
+    { connect: () => void; on: () => void },
+    { onTokenizationReady?: (text: string) => void },
+    { text: string }
+  >({
+    bindMpvMainEventHandlersMainDeps: {
+      appState: {
+        initialArgs: null,
+        overlayRuntimeInitialized: true,
+        mpvClient: null,
+        immersionTracker: null,
+        subtitleTimingTracker: null,
+        currentSubText: '',
+        currentSubAssText: '',
+        playbackPaused: null,
+        previousSecondarySubVisibility: null,
+      },
+      getQuitOnDisconnectArmed: () => false,
+      scheduleQuitCheck: () => {},
+      quitApp: () => {},
+      reportJellyfinRemoteStopped: () => {},
+      syncOverlayMpvSubtitleSuppression: () => {},
+      maybeRunAnilistPostWatchUpdate: async () => {},
+      logSubtitleTimingError: () => {},
+      broadcastToOverlayWindows: () => {},
+      onSubtitleChange: () => {},
+      refreshDiscordPresence: () => {},
+      ensureImmersionTrackerInitialized: () => {},
+      updateCurrentMediaPath: () => {},
+      restoreMpvSubVisibility: () => {},
+      getCurrentAnilistMediaKey: () => null,
+      resetAnilistMediaTracking: () => {},
+      maybeProbeAnilistDuration: () => {},
+      ensureAnilistMediaGuess: () => {},
+      syncImmersionMediaState: () => {},
+      updateCurrentMediaTitle: () => {},
+      resetAnilistMediaGuessState: () => {},
+      reportJellyfinRemoteProgress: () => {},
+      updateSubtitleRenderMetrics: () => {},
+    },
+    mpvClientRuntimeServiceFactoryMainDeps: {
+      createClient: class {
+        connect(): void {}
+        on(): void {}
+      },
+      getSocketPath: () => '/tmp/mpv.sock',
+      getResolvedConfig: () => ({ auto_start_overlay: false }),
+      isAutoStartOverlayEnabled: () => false,
+      setOverlayVisible: () => {},
+      isVisibleOverlayVisible: () => false,
+      getReconnectTimer: () => null,
+      setReconnectTimer: () => {},
+    },
+    updateMpvSubtitleRenderMetricsMainDeps: {
+      getCurrentMetrics: () => BASE_METRICS,
+      setCurrentMetrics: () => {},
+      applyPatch: (current, patch) => ({ next: { ...current, ...patch }, changed: true }),
+      broadcastMetrics: () => {},
+    },
+    tokenizer: {
+      buildTokenizerDepsMainDeps: {
+        getYomitanExt: () => null,
+        getYomitanParserWindow: () => null,
+        setYomitanParserWindow: () => {},
+        getYomitanParserReadyPromise: () => null,
+        setYomitanParserReadyPromise: () => {},
+        getYomitanParserInitPromise: () => null,
+        setYomitanParserInitPromise: () => {},
+        isKnownWord: () => false,
+        recordLookup: () => {},
+        getKnownWordMatchMode: () => 'headword',
+        getNPlusOneEnabled: () => false,
+        getMinSentenceWordsForNPlusOne: () => 3,
+        getJlptLevel: () => null,
+        getJlptEnabled: () => true,
+        getFrequencyDictionaryEnabled: () => true,
+        getFrequencyDictionaryMatchMode: () => 'headword',
+        getFrequencyRank: () => null,
+        getYomitanGroupDebugEnabled: () => false,
+        getMecabTokenizer: () => null,
+      },
+      createTokenizerRuntimeDeps: (deps) =>
+        deps as unknown as { onTokenizationReady?: (text: string) => void },
+      tokenizeSubtitle: async (text, deps) => {
+        deps.onTokenizationReady?.(text);
+        return { text };
+      },
+      createMecabTokenizerAndCheckMainDeps: {
+        getMecabTokenizer: () => null,
+        setMecabTokenizer: () => {},
+        createMecabTokenizer: () => ({ id: 'mecab' }),
+        checkAvailability: async () => {},
+      },
+      prewarmSubtitleDictionariesMainDeps: {
+        ensureJlptDictionaryLookup: async () => jlptDeferred.promise,
+        ensureFrequencyDictionaryLookup: async () => frequencyDeferred.promise,
+        showMpvOsd: (message) => {
+          osdMessages.push(message);
+        },
+      },
+    },
+    warmups: {
+      launchBackgroundWarmupTaskMainDeps: {
+        now: () => 0,
+        logDebug: () => {},
+        logWarn: () => {},
+      },
+      startBackgroundWarmupsMainDeps: {
+        getStarted: () => false,
+        setStarted: () => {},
+        isTexthookerOnlyMode: () => false,
+        ensureYomitanExtensionLoaded: async () => undefined,
+        shouldWarmupMecab: () => false,
+        shouldWarmupYomitanExtension: () => false,
+        shouldWarmupSubtitleDictionaries: () => false,
+        shouldWarmupJellyfinRemoteSession: () => false,
+        shouldAutoConnectJellyfinRemote: () => false,
+        startJellyfinRemoteSession: async () => {},
+      },
+    },
+  });
+
+  const warmupPromise = composed.startTokenizationWarmups();
+  await new Promise<void>((resolve) => setImmediate(resolve));
+  assert.deepEqual(osdMessages, []);
+
+  await composed.tokenizeSubtitle('first line');
+  assert.deepEqual(osdMessages, ['Loading subtitle annotations |']);
+
+  jlptDeferred.resolve();
+  frequencyDeferred.resolve();
+  await warmupPromise;
+  await new Promise<void>((resolve) => setImmediate(resolve));
+
+  assert.deepEqual(osdMessages, ['Loading subtitle annotations |', 'Subtitle annotations loaded']);
+});

src/main/runtime/composers/mpv-runtime-composer.ts

@@ -133,15 +133,58 @@ export function composeMpvRuntimeHandlers<
   const prewarmSubtitleDictionaries = createPrewarmSubtitleDictionariesMainHandler(
     options.tokenizer.prewarmSubtitleDictionariesMainDeps,
   );
+  const shouldInitializeMecabForAnnotations = (): boolean => {
+    const nPlusOneEnabled =
+      options.tokenizer.buildTokenizerDepsMainDeps.getNPlusOneEnabled?.() !== false;
+    const jlptEnabled = options.tokenizer.buildTokenizerDepsMainDeps.getJlptEnabled() !== false;
+    const frequencyEnabled =
+      options.tokenizer.buildTokenizerDepsMainDeps.getFrequencyDictionaryEnabled() !== false;
+    return nPlusOneEnabled || jlptEnabled || frequencyEnabled;
+  };
+  const shouldWarmupAnnotationDictionaries = (): boolean => {
+    const jlptEnabled = options.tokenizer.buildTokenizerDepsMainDeps.getJlptEnabled() !== false;
+    const frequencyEnabled =
+      options.tokenizer.buildTokenizerDepsMainDeps.getFrequencyDictionaryEnabled() !== false;
+    return jlptEnabled || frequencyEnabled;
+  };
   let tokenizationWarmupInFlight: Promise<void> | null = null;
+  let tokenizationPrerequisiteWarmupInFlight: Promise<void> | null = null;
+  let tokenizationPrerequisiteWarmupCompleted = false;
+  let tokenizationWarmupCompleted = false;
+  const ensureTokenizationPrerequisites = (): Promise<void> => {
+    if (tokenizationPrerequisiteWarmupCompleted) {
+      return Promise.resolve();
+    }
+    if (!tokenizationPrerequisiteWarmupInFlight) {
+      tokenizationPrerequisiteWarmupInFlight = options.warmups.startBackgroundWarmupsMainDeps
+        .ensureYomitanExtensionLoaded()
+        .then(() => {
+          tokenizationPrerequisiteWarmupCompleted = true;
+        })
+        .finally(() => {
+          tokenizationPrerequisiteWarmupInFlight = null;
+        });
+    }
+    return tokenizationPrerequisiteWarmupInFlight;
+  };
   const startTokenizationWarmups = (): Promise<void> => {
+    if (tokenizationWarmupCompleted) {
+      return Promise.resolve();
+    }
     if (!tokenizationWarmupInFlight) {
       tokenizationWarmupInFlight = (async () => {
-        await options.warmups.startBackgroundWarmupsMainDeps.ensureYomitanExtensionLoaded();
+        const warmupTasks: Promise<unknown>[] = [ensureTokenizationPrerequisites()];
-        if (!options.tokenizer.createMecabTokenizerAndCheckMainDeps.getMecabTokenizer()) {
+        if (
-          await createMecabTokenizerAndCheck().catch(() => {});
+          shouldInitializeMecabForAnnotations() &&
+          !options.tokenizer.createMecabTokenizerAndCheckMainDeps.getMecabTokenizer()
+        ) {
+          warmupTasks.push(createMecabTokenizerAndCheck().catch(() => {}));
         }
-        await prewarmSubtitleDictionaries({ showLoadingOsd: true });
+        if (shouldWarmupAnnotationDictionaries()) {
+          warmupTasks.push(prewarmSubtitleDictionaries().catch(() => {}));
+        }
+        await Promise.all(warmupTasks);
+        tokenizationWarmupCompleted = true;
       })().finally(() => {
         tokenizationWarmupInFlight = null;
       });
@@ -149,10 +192,21 @@ export function composeMpvRuntimeHandlers<
     return tokenizationWarmupInFlight;
   };
   const tokenizeSubtitle = async (text: string): Promise<TTokenizedSubtitle> => {
-    await startTokenizationWarmups();
+    if (!tokenizationWarmupCompleted) void startTokenizationWarmups();
+    await ensureTokenizationPrerequisites();
+    const tokenizerMainDeps = buildTokenizerDepsHandler();
+    if (shouldWarmupAnnotationDictionaries()) {
+      const onTokenizationReady = tokenizerMainDeps.onTokenizationReady;
+      tokenizerMainDeps.onTokenizationReady = (tokenizedText: string): void => {
+        onTokenizationReady?.(tokenizedText);
+        if (!tokenizationWarmupCompleted) {
+          void prewarmSubtitleDictionaries({ showLoadingOsd: true }).catch(() => {});
+        }
+      };
+    }
     return options.tokenizer.tokenizeSubtitle(
       text,
-      options.tokenizer.createTokenizerRuntimeDeps(buildTokenizerDepsHandler()),
+      options.tokenizer.createTokenizerRuntimeDeps(tokenizerMainDeps),
     );
   };