feat(stats): add launcher stats command and build integration

- Launcher stats subcommand with cleanup mode
- Stats frontend build integrated into Makefile
- CI workflow updated for stats package
- Config example updated with stats section
- mpv plugin menu entry for stats toggle

.github/workflows/ci.yml

@@ -27,13 +27,16 @@ jobs:
           path: |
             ~/.bun/install/cache
             node_modules
+            stats/node_modules
             vendor/subminer-yomitan/node_modules
-          key: ${{ runner.os }}-bun-${{ hashFiles('bun.lock', 'vendor/subminer-yomitan/package-lock.json') }}
+          key: ${{ runner.os }}-bun-${{ hashFiles('bun.lock', 'stats/bun.lock', 'vendor/subminer-yomitan/package-lock.json') }}
           restore-keys: |
             ${{ runner.os }}-bun-
 
       - name: Install dependencies
-        run: bun install --frozen-lockfile
+        run: |
+          bun install --frozen-lockfile
+          cd stats && bun install --frozen-lockfile
 
       - name: Lint changelog fragments
         run: bun run changelog:lint
@@ -49,6 +52,9 @@ jobs:
       - name: Verify generated config examples
         run: bun run verify:config-example
 
+      - name: Internal docs knowledge-base checks
+        run: bun run test:docs:kb
+
       - name: Test suite (source)
         run: bun run test:fast
 

.gitignore

@@ -52,3 +52,4 @@ tests/*
 !.agents/skills/subminer-scrum-master/SKILL.md
 favicon.png
 .claude/*
+!stats/public/favicon.png

AGENTS.md

@@ -1,17 +1,29 @@
 # AGENTS.MD
 
+## Internal Docs
+
+Start here, then leave this file.
+
+- Internal system of record: [`docs/README.md`](./docs/README.md)
+- Architecture map: [`docs/architecture/README.md`](./docs/architecture/README.md)
+- Workflow map: [`docs/workflow/README.md`](./docs/workflow/README.md)
+- Verification lanes: [`docs/workflow/verification.md`](./docs/workflow/verification.md)
+- Knowledge-base rules: [`docs/knowledge-base/README.md`](./docs/knowledge-base/README.md)
+- Release guide: [`docs/RELEASING.md`](./docs/RELEASING.md)
+
+`docs-site/` is user-facing. Do not treat it as the canonical internal source of truth.
+
 ## Quick Start
 
-- Read [`docs-site/development.md`](./docs-site/development.md) and [`docs-site/architecture.md`](./docs-site/architecture.md) before substantial changes; follow them unless task requires deviation.
+- Init workspace: `git submodule update --init --recursive`
-- Init workspace: `git submodule update --init --recursive`.
+- Install deps: `make deps` or `bun install` plus `(cd vendor/texthooker-ui && bun install --frozen-lockfile)`
-- Install deps: `make deps` or `bun install` plus `(cd vendor/texthooker-ui && bun install --frozen-lockfile)`.
+- Fast dev loop: `make dev-watch`
-- Fast dev loop: `make dev-watch`.
+- Full local run: `bun run dev`
-- Full local run: `bun run dev`.
+- Verbose Electron debug: `electron . --start --dev --log-level debug`
-- Verbose Electron debug: `electron . --start --dev --log-level debug`.
 
 ## Build / Test
 
-- Use repo package manager/runtime only: Bun (`packageManager: bun@1.3.5`).
+- Runtime/package manager: Bun (`packageManager: bun@1.3.5`)
 - Default handoff gate:
   `bun run typecheck`
   `bun run test:fast`
@@ -21,59 +33,37 @@
 - If `docs-site/` changed, also run:
   `bun run docs:test`
   `bun run docs:build`
-- Formatting: prefer `make pretty` and `bun run format:check:src`; use `bun run format` only intentionally.
+- Prefer `make pretty` and `bun run format:check:src`
-- Keep verification observable; capture failing command + exact error in notes/handoff.
 
 ## Change-Specific Checks
 
-- Config/schema/defaults changes: run `bun run test:config`; if config template/defaults changed, run `bun run generate:config-example`.
+- Config/schema/defaults: `bun run test:config`; if template/defaults changed, `bun run generate:config-example`
-- Launcher/plugin changes: run `bun run test:launcher` or `bun run test:env`; use `bun run test:launcher:smoke:src` for focused launcher e2e checks.
+- Launcher/plugin: `bun run test:launcher` or `bun run test:env`
-- Runtime-compat or compiled/dist-sensitive changes: run `bun run test:runtime:compat`.
+- Runtime-compat / dist-sensitive: `bun run test:runtime:compat`
-- Docs-only changes: at least `bun run docs:test` if docs behavior/assertions changed; `bun run docs:build` before handoff.
+- Docs-only: `bun run docs:test`, then `bun run docs:build`
 
-## Generated / Sensitive Files
+## Sensitive Files
 
-- Launcher source of truth: `launcher/*.ts`.
+- Launcher source of truth: `launcher/*.ts`
-- Generated launcher artifact: `dist/launcher/subminer`; never hand-edit it.
+- Generated launcher artifact: `dist/launcher/subminer`; never hand-edit it
-- Repo-root `./subminer` is stale artifact path; do not revive/use it.
+- Repo-root `./subminer` is stale; do not revive it
-- `bun run build` rebuilds bundled Yomitan from `vendor/subminer-yomitan`; check submodules before debugging build failures.
+- `bun run build` rebuilds bundled Yomitan from `vendor/subminer-yomitan`
-- Avoid changing packaging/signing identifiers (`build.appId`, mac entitlements, signing-related settings) unless task explicitly requires it.
+- Do not change signing/packaging identifiers unless the task explicitly requires it
 
-## Docs
+## Release / PR Notes
 
-- Docs site lives in-repo under [`docs-site/`](./docs-site/).
+- User-visible PRs need one fragment in `changes/*.md`
-- Update docs for new/breaking behavior; no ship with stale docs.
+- CI enforces `bun run changelog:lint` and `bun run changelog:pr-check`
-- Make sure [`docs-site/changelog.md`](./docs-site/changelog.md) is updated on each release.
+- PR review helpers:
+  - `gh pr view --json number,title,url --jq '"PR #\\(.number): \\(.title)\\n\\(.url)"'`
+  - `gh api repos/:owner/:repo/pulls/<num>/comments --paginate`
 
-## PR Feedback
+## Runtime Notes
 
-- Active PR: `gh pr view --json number,title,url --jq '"PR #\\(.number): \\(.title)\\n\\(.url)"'`.
+- Use Codex background for long jobs; tmux only when persistence/interaction is required
-- PR comments: `gh pr view …` + `gh api …/comments --paginate`.
+- CI red: `gh run list/view`, rerun, fix, repeat until green
-- Replies: cite fix + file/line; resolve threads only after fix lands.
+- TypeScript: keep files small; follow existing patterns
-
+- Swift: use workspace helper/daemon; validate `swift build` + tests
-## Changelog
-
-- User-visible PRs: add one fragment in `changes/*.md`.
-- Fragment format:
-  `type: added|changed|fixed|docs|internal`
-  `area: <short-area>`
-  blank line
-  `- bullet`
-- `changes/README.md`: instructions only; generator ignores it.
-- No release-note entry wanted: use PR label `skip-changelog`.
-- CI runs `bun run changelog:lint` + `bun run changelog:pr-check` on PRs.
-- Release prep: `bun run changelog:build`, review `CHANGELOG.md` + `release/release-notes.md`, commit generated changelog + fragment deletions, then tag.
-- Release CI expects committed changelog entry already present; do not rely on tag job to invent notes.
-
-## Flow & Runtime
-
-- Use Codex background for long jobs; tmux only for interactive/persistent (debugger/server).
-- CI red: `gh run list/view`, rerun, fix, push, repeat til green.
-
-## Language/Stack Notes
-
-- Swift: use workspace helper/daemon; validate `swift build` + tests; keep concurrency attrs right.
-- TypeScript: use repo PM; keep files small; follow existing patterns.
 
 <!-- BACKLOG.MD MCP GUIDELINES START -->
 

Makefile

@@ -69,7 +69,7 @@ help:
 		"  generate-config  Generate ~/.config/SubMiner/config.jsonc from centralized defaults" \
 		"" \
 		"Other targets:" \
-		"  deps             Install JS dependencies (root + texthooker-ui)" \
+		"  deps             Install JS dependencies (root + stats + texthooker-ui)" \
 		"  uninstall-linux  Remove Linux install artifacts" \
 		"  uninstall-macos  Remove macOS install artifacts" \
 		"  uninstall-windows Remove Windows mpv plugin artifacts" \
@@ -104,6 +104,7 @@ print-dirs:
 deps:
 	@$(MAKE) --no-print-directory ensure-bun
 	@bun install
+	@cd stats && bun install --frozen-lockfile
 	@cd vendor/texthooker-ui && bun install --frozen-lockfile
 
 ensure-bun:

README.md

@@ -27,6 +27,7 @@ SubMiner is an Electron overlay that sits on top of mpv. It turns your video pla
 - **Look up words as you watch** — Yomitan dictionary popups on hover or keyboard-driven token-by-token navigation
 - **One-key Anki mining** — Creates cards with sentence, audio, screenshot, and translation; optional local AnkiConnect proxy auto-enriches Yomitan cards instantly
 - **Reading annotations** — N+1 targeting, frequency-dictionary highlighting, JLPT underlining, and character name dictionary for anime/manga proper nouns
+- **Immersion stats** — Optional dashboard for watch time, sessions, trends, vocabulary, and mining throughput
 - **Subtitle tools** — Download from Jimaku, sync with alass/ffsubsync
 - **Jellyfin & AniList integration** — Remote playback, cast device mode, and automatic episode progress tracking
 - **Texthooker & API** — Built-in texthooker page and annotated websocket feed for external clients
@@ -118,7 +119,7 @@ Windows builds use native window tracking and do not require the Linux composito
 
 ## Documentation
 
-For full guides on configuration, Anki, Jellyfin, and more, see [docs.subminer.moe](https://docs.subminer.moe). The VitePress source for that site lives in [`docs-site/`](./docs-site/).
+For full guides on configuration, Anki, Jellyfin, immersion tracking/stats, and more, see [docs.subminer.moe](https://docs.subminer.moe). The VitePress source for that site lives in [`docs-site/`](./docs-site/).
 
 ## Acknowledgments
 

bun.lock

@@ -5,9 +5,11 @@
     "": {
       "name": "subminer",
       "dependencies": {
+        "@hono/node-server": "^1.19.11",
         "axios": "^1.13.5",
         "commander": "^14.0.3",
         "discord-rpc": "^4.0.1",
+        "hono": "^4.12.7",
         "jsonc-parser": "^3.3.1",
         "libsql": "^0.5.22",
         "ws": "^8.19.0",
@@ -96,6 +98,8 @@
 
     "@esbuild/win32-x64": ["@esbuild/win32-x64@0.25.12", "", { "os": "win32", "cpu": "x64" }, "sha512-alJC0uCZpTFrSL0CCDjcgleBXPnCrEAhTBILpeAp7M/OFgoqtAetfBzX0xM00MUsVVPpVjlPuMbREqnZCXaTnA=="],
 
+    "@hono/node-server": ["@hono/node-server@1.19.11", "", { "peerDependencies": { "hono": "^4" } }, "sha512-dr8/3zEaB+p0D2n/IUrlPF1HZm586qgJNXK1a9fhg/PzdtkK7Ksd5l312tJX2yBuALqDYBlG20QEbayqPyxn+g=="],
+
     "@isaacs/cliui": ["@isaacs/cliui@9.0.0", "", {}, "sha512-AokJm4tuBHillT+FpMtxQ60n8ObyXBatq7jD2/JA9dxbDDokKQm8KMht5ibGzLVU9IJDIKK4TPKgMHEYMn3lMg=="],
 
     "@isaacs/fs-minipass": ["@isaacs/fs-minipass@4.0.1", "", { "dependencies": { "minipass": "7.1.2" } }, "sha512-wgm9Ehl2jpeqP3zw/7mo3kRHFp5MEDhqAdwy1fTGkHAwnkGOVsgpvQhL8B5n1qlb01jV3n/bI0ZfZp5lWA1k4w=="],
@@ -396,6 +400,8 @@
 
     "hasown": ["hasown@2.0.2", "", { "dependencies": { "function-bind": "1.1.2" } }, "sha512-0hJU9SCPvmMzIBdZFqNPXWa6dqh7WdH0cII9y+CyS8rG3nL48Bclra9HmKhVVUHyPWNH5Y7xDwAB7bfgSjkUMQ=="],
 
+    "hono": ["hono@4.12.7", "", {}, "sha512-jq9l1DM0zVIvsm3lv9Nw9nlJnMNPOcAtsbsgiUhWcFzPE99Gvo6yRTlszSLLYacMeQ6quHD6hMfId8crVHvexw=="],
+
     "hosted-git-info": ["hosted-git-info@4.1.0", "", { "dependencies": { "lru-cache": "6.0.0" } }, "sha512-kyCuEOWjJqZuDbRHzL8V93NzQhwIB71oFWSyzVo+KPZI+pnQPPxucdkrOZvkLRnrf5URsQM+IJ09Dw29cRALIA=="],
 
     "http-cache-semantics": ["http-cache-semantics@4.2.0", "", {}, "sha512-dTxcvPXqPvXBQpq5dUr6mEMJX4oIEFv6bwom3FDwKRDsuIjjJGANqhBuoAn9c1RQJIdAKav33ED65E2ys+87QQ=="],

config.example.jsonc

@@ -503,5 +503,16 @@
       "monthlyRollupsDays": 1825, // Monthly rollup retention window in days.
       "vacuumIntervalDays": 7 // Minimum days between VACUUM runs.
     } // Retention setting.
-  } // Enable/disable immersion tracking.
+  }, // Enable/disable immersion tracking.
+
+  // ==========================================
+  // Stats Dashboard
+  // Local immersion stats dashboard served on localhost and available as an in-app overlay.
+  // Uses the immersion tracking database for overview, trends, sessions, and vocabulary views.
+  // ==========================================
+  "stats": {
+    "toggleKey": "Backquote", // Key code to toggle the stats overlay.
+    "serverPort": 5175, // Port for the stats HTTP server.
+    "autoStartServer": true // Automatically start the stats server on launch. Values: true | false
+  } // Local immersion stats dashboard served on localhost and available as an in-app overlay.
 }

launcher/commands/command-modules.test.ts

@@ -7,6 +7,7 @@ import { runConfigCommand } from './config-command.js';
 import { runDictionaryCommand } from './dictionary-command.js';
 import { runDoctorCommand } from './doctor-command.js';
 import { runMpvPreAppCommand } from './mpv-command.js';
+import { runStatsCommand } from './stats-command.js';
 
 class ExitSignal extends Error {
   code: number;
@@ -128,3 +129,98 @@ test('dictionary command throws if app handoff unexpectedly returns', () => {
     /unexpectedly returned/,
   );
 });
+
+test('stats command launches attached app command with response path', async () => {
+  const context = createContext();
+  context.args.stats = true;
+  context.args.logLevel = 'debug';
+  const forwarded: string[][] = [];
+
+  const handled = await runStatsCommand(context, {
+    createTempDir: () => '/tmp/subminer-stats-test',
+    joinPath: (...parts) => parts.join('/'),
+    runAppCommandAttached: async (_appPath, appArgs) => {
+      forwarded.push(appArgs);
+      return 0;
+    },
+    waitForStatsResponse: async () => ({ ok: true, url: 'http://127.0.0.1:5175' }),
+    removeDir: () => {},
+  });
+
+  assert.equal(handled, true);
+  assert.deepEqual(forwarded, [
+    ['--stats', '--stats-response-path', '/tmp/subminer-stats-test/response.json', '--log-level', 'debug'],
+  ]);
+});
+
+test('stats cleanup command forwards cleanup vocab flags to the app', async () => {
+  const context = createContext();
+  context.args.stats = true;
+  context.args.statsCleanup = true;
+  context.args.statsCleanupVocab = true;
+  const forwarded: string[][] = [];
+
+  const handled = await runStatsCommand(context, {
+    createTempDir: () => '/tmp/subminer-stats-test',
+    joinPath: (...parts) => parts.join('/'),
+    runAppCommandAttached: async (_appPath, appArgs) => {
+      forwarded.push(appArgs);
+      return 0;
+    },
+    waitForStatsResponse: async () => ({ ok: true }),
+    removeDir: () => {},
+  });
+
+  assert.equal(handled, true);
+  assert.deepEqual(forwarded, [
+    [
+      '--stats',
+      '--stats-response-path',
+      '/tmp/subminer-stats-test/response.json',
+      '--stats-cleanup',
+      '--stats-cleanup-vocab',
+    ],
+  ]);
+});
+
+test('stats command throws when stats response reports an error', async () => {
+  const context = createContext();
+  context.args.stats = true;
+
+  await assert.rejects(
+    async () => {
+      await runStatsCommand(context, {
+        createTempDir: () => '/tmp/subminer-stats-test',
+        joinPath: (...parts) => parts.join('/'),
+        runAppCommandAttached: async () => 0,
+        waitForStatsResponse: async () => ({
+          ok: false,
+          error: 'Immersion tracking is disabled in config.',
+        }),
+        removeDir: () => {},
+      });
+    },
+    /Immersion tracking is disabled in config\./,
+  );
+});
+
+test('stats command fails if attached app exits before startup response', async () => {
+  const context = createContext();
+  context.args.stats = true;
+
+  await assert.rejects(
+    async () => {
+      await runStatsCommand(context, {
+        createTempDir: () => '/tmp/subminer-stats-test',
+        joinPath: (...parts) => parts.join('/'),
+        runAppCommandAttached: async () => 2,
+        waitForStatsResponse: async () => {
+          await new Promise((resolve) => setTimeout(resolve, 25));
+          return { ok: true, url: 'http://127.0.0.1:5175' };
+        },
+        removeDir: () => {},
+      });
+    },
+    /Stats app exited before startup response \(status 2\)\./,
+  );
+});

launcher/commands/stats-command.ts

@@ -0,0 +1,108 @@
+import fs from 'node:fs';
+import os from 'node:os';
+import path from 'node:path';
+import { runAppCommandAttached } from '../mpv.js';
+import { sleep } from '../util.js';
+import type { LauncherCommandContext } from './context.js';
+
+type StatsCommandResponse = {
+  ok: boolean;
+  url?: string;
+  error?: string;
+};
+
+type StatsCommandDeps = {
+  createTempDir: (prefix: string) => string;
+  joinPath: (...parts: string[]) => string;
+  runAppCommandAttached: (
+    appPath: string,
+    appArgs: string[],
+    logLevel: LauncherCommandContext['args']['logLevel'],
+    label: string,
+  ) => Promise<number>;
+  waitForStatsResponse: (responsePath: string) => Promise<StatsCommandResponse>;
+  removeDir: (targetPath: string) => void;
+};
+
+const defaultDeps: StatsCommandDeps = {
+  createTempDir: (prefix) => fs.mkdtempSync(path.join(os.tmpdir(), prefix)),
+  joinPath: (...parts) => path.join(...parts),
+  runAppCommandAttached: (appPath, appArgs, logLevel, label) =>
+    runAppCommandAttached(appPath, appArgs, logLevel, label),
+  waitForStatsResponse: async (responsePath) => {
+    const deadline = Date.now() + 8000;
+    while (Date.now() < deadline) {
+      try {
+        if (fs.existsSync(responsePath)) {
+          return JSON.parse(fs.readFileSync(responsePath, 'utf8')) as StatsCommandResponse;
+        }
+      } catch {
+        // retry until timeout
+      }
+      await sleep(100);
+    }
+    return {
+      ok: false,
+      error: 'Timed out waiting for stats dashboard startup response.',
+    };
+  },
+  removeDir: (targetPath) => {
+    fs.rmSync(targetPath, { recursive: true, force: true });
+  },
+};
+
+export async function runStatsCommand(
+  context: LauncherCommandContext,
+  deps: StatsCommandDeps = defaultDeps,
+): Promise<boolean> {
+  const { args, appPath } = context;
+  if (!args.stats || !appPath) {
+    return false;
+  }
+
+  const tempDir = deps.createTempDir('subminer-stats-');
+  const responsePath = deps.joinPath(tempDir, 'response.json');
+
+  try {
+    const forwarded = ['--stats', '--stats-response-path', responsePath];
+    if (args.statsCleanup) {
+      forwarded.push('--stats-cleanup');
+    }
+    if (args.statsCleanupVocab) {
+      forwarded.push('--stats-cleanup-vocab');
+    }
+    if (args.logLevel !== 'info') {
+      forwarded.push('--log-level', args.logLevel);
+    }
+    const attachedExitPromise = deps.runAppCommandAttached(
+      appPath,
+      forwarded,
+      args.logLevel,
+      'stats',
+    );
+    const startupResult = await Promise.race([
+      deps.waitForStatsResponse(responsePath).then((response) => ({ kind: 'response' as const, response })),
+      attachedExitPromise.then((status) => ({ kind: 'exit' as const, status })),
+    ]);
+    if (startupResult.kind === 'exit') {
+      if (startupResult.status !== 0) {
+        throw new Error(`Stats app exited before startup response (status ${startupResult.status}).`);
+      }
+      const response = await deps.waitForStatsResponse(responsePath);
+      if (!response.ok) {
+        throw new Error(response.error || 'Stats dashboard failed to start.');
+      }
+      return true;
+    }
+    if (!startupResult.response.ok) {
+      throw new Error(startupResult.response.error || 'Stats dashboard failed to start.');
+    }
+    const exitStatus = await attachedExitPromise;
+    if (exitStatus !== 0) {
+      throw new Error(`Stats app exited with status ${exitStatus}.`);
+    }
+    return true;
+  } finally {
+    deps.removeDir(tempDir);
+  }
+}

launcher/config/args-normalizer.ts

@@ -122,6 +122,9 @@ export function createDefaultArgs(launcherConfig: LauncherYoutubeSubgenConfig):
     jellyfinPlay: false,
     jellyfinDiscovery: false,
     dictionary: false,
+    stats: false,
+    statsCleanup: false,
+    statsCleanupVocab: false,
     doctor: false,
     configPath: false,
     configShow: false,
@@ -188,6 +191,9 @@ export function applyRootOptionsToArgs(
 
 export function applyInvocationsToArgs(parsed: Args, invocations: CliInvocations): void {
   if (invocations.dictionaryTriggered) parsed.dictionary = true;
+  if (invocations.statsTriggered) parsed.stats = true;
+  if (invocations.statsCleanup) parsed.statsCleanup = true;
+  if (invocations.statsCleanupVocab) parsed.statsCleanupVocab = true;
   if (invocations.dictionaryTarget) {
     parsed.dictionaryTarget = parseDictionaryTarget(invocations.dictionaryTarget);
   }
@@ -256,6 +262,9 @@ export function applyInvocationsToArgs(parsed: Args, invocations: CliInvocations
   if (invocations.dictionaryLogLevel) {
     parsed.logLevel = parseLogLevel(invocations.dictionaryLogLevel);
   }
+  if (invocations.statsLogLevel) {
+    parsed.logLevel = parseLogLevel(invocations.statsLogLevel);
+  }
 
   if (invocations.doctorLogLevel) parsed.logLevel = parseLogLevel(invocations.doctorLogLevel);
   if (invocations.texthookerLogLevel)

launcher/config/cli-parser-builder.ts

@@ -40,6 +40,10 @@ export interface CliInvocations {
   dictionaryTriggered: boolean;
   dictionaryTarget: string | null;
   dictionaryLogLevel: string | null;
+  statsTriggered: boolean;
+  statsCleanup: boolean;
+  statsCleanupVocab: boolean;
+  statsLogLevel: string | null;
   doctorTriggered: boolean;
   doctorLogLevel: string | null;
   texthookerTriggered: boolean;
@@ -87,6 +91,7 @@ function getTopLevelCommand(argv: string[]): { name: string; index: number } | n
     'mpv',
     'dictionary',
     'dict',
+    'stats',
     'texthooker',
     'app',
     'bin',
@@ -137,6 +142,10 @@ export function parseCliPrograms(
   let dictionaryTriggered = false;
   let dictionaryTarget: string | null = null;
   let dictionaryLogLevel: string | null = null;
+  let statsTriggered = false;
+  let statsCleanup = false;
+  let statsCleanupVocab = false;
+  let statsLogLevel: string | null = null;
   let doctorLogLevel: string | null = null;
   let texthookerLogLevel: string | null = null;
   let doctorTriggered = false;
@@ -241,6 +250,21 @@ export function parseCliPrograms(
       dictionaryLogLevel = typeof options.logLevel === 'string' ? options.logLevel : null;
     });
 
+  commandProgram
+    .command('stats')
+    .description('Launch the local immersion stats dashboard')
+    .argument('[action]', 'cleanup')
+    .option('-v, --vocab', 'Clean vocabulary rows in the stats database')
+    .option('--log-level <level>', 'Log level')
+    .action((action: string | undefined, options: Record<string, unknown>) => {
+      statsTriggered = true;
+      if ((action || '').toLowerCase() === 'cleanup') {
+        statsCleanup = true;
+        statsCleanupVocab = options.vocab === true;
+      }
+      statsLogLevel = typeof options.logLevel === 'string' ? options.logLevel : null;
+    });
+
   commandProgram
     .command('doctor')
     .description('Run dependency and environment checks')
@@ -319,6 +343,10 @@ export function parseCliPrograms(
       dictionaryTriggered,
       dictionaryTarget,
       dictionaryLogLevel,
+      statsTriggered,
+      statsCleanup,
+      statsCleanupVocab,
+      statsLogLevel,
       doctorTriggered,
       doctorLogLevel,
       texthookerTriggered,

launcher/main.test.ts

@@ -335,6 +335,55 @@ test('dictionary command forwards --dictionary and --dictionary-target to app co
   });
 });
 
+test('stats command launches attached app flow and waits for response file', { timeout: 15000 }, () => {
+  withTempDir((root) => {
+    const homeDir = path.join(root, 'home');
+    const xdgConfigHome = path.join(root, 'xdg');
+    const appPath = path.join(root, 'fake-subminer.sh');
+    const capturePath = path.join(root, 'captured-args.txt');
+    fs.writeFileSync(
+      appPath,
+      `#!/bin/sh
+set -eu
+response_path=""
+prev=""
+for arg in "$@"; do
+  if [ "$prev" = "--stats-response-path" ]; then
+    response_path="$arg"
+    prev=""
+    continue
+  fi
+  case "$arg" in
+    --stats-response-path=*)
+      response_path="\${arg#--stats-response-path=}"
+      ;;
+    --stats-response-path)
+      prev="--stats-response-path"
+      ;;
+  esac
+done
+if [ -n "$SUBMINER_TEST_STATS_CAPTURE" ]; then
+  printf '%s\\n' "$@" > "$SUBMINER_TEST_STATS_CAPTURE"
+fi
+mkdir -p "$(dirname "$response_path")"
+printf '%s' '{"ok":true,"url":"http://127.0.0.1:5175"}' > "$response_path"
+exit 0
+`,
+    );
+    fs.chmodSync(appPath, 0o755);
+
+    const env = {
+      ...makeTestEnv(homeDir, xdgConfigHome),
+      SUBMINER_APPIMAGE_PATH: appPath,
+      SUBMINER_TEST_STATS_CAPTURE: capturePath,
+    };
+    const result = runLauncher(['stats', '--log-level', 'debug'], env);
+
+    assert.equal(result.status, 0, `stdout:\n${result.stdout}\nstderr:\n${result.stderr}`);
+    assert.match(fs.readFileSync(capturePath, 'utf8'), /^--stats\n--stats-response-path\n.+\n--log-level\ndebug\n$/);
+  });
+});
+
 test('jellyfin discovery routes to app --background and remote announce with log-level forwarding', () => {
   withTempDir((root) => {
     const homeDir = path.join(root, 'home');

launcher/main.ts

@@ -14,6 +14,7 @@ import { runConfigCommand } from './commands/config-command.js';
 import { runMpvPostAppCommand, runMpvPreAppCommand } from './commands/mpv-command.js';
 import { runAppPassthroughCommand, runTexthookerCommand } from './commands/app-command.js';
 import { runDictionaryCommand } from './commands/dictionary-command.js';
+import { runStatsCommand } from './commands/stats-command.js';
 import { runJellyfinCommand } from './commands/jellyfin-command.js';
 import { runPlaybackCommand } from './commands/playback-command.js';
 
@@ -95,6 +96,10 @@ async function main(): Promise<void> {
     return;
   }
 
+  if (await runStatsCommand(appContext)) {
+    return;
+  }
+
   if (await runJellyfinCommand(appContext)) {
     return;
   }

launcher/mpv.test.ts

@@ -133,6 +133,7 @@ function makeArgs(overrides: Partial<Args> = {}): Args {
     jellyfinPlay: false,
     jellyfinDiscovery: false,
     dictionary: false,
+    stats: false,
     doctor: false,
     configPath: false,
     configShow: false,

launcher/mpv.ts

@@ -756,6 +756,37 @@ export function runAppCommandCaptureOutput(
   };
 }
 
+export function runAppCommandAttached(
+  appPath: string,
+  appArgs: string[],
+  logLevel: LogLevel,
+  label: string,
+): Promise<number> {
+  if (maybeCaptureAppArgs(appArgs)) {
+    return Promise.resolve(0);
+  }
+
+  const target = resolveAppSpawnTarget(appPath, appArgs);
+  log(
+    'debug',
+    logLevel,
+    `${label}: launching attached app with args: ${[target.command, ...target.args].join(' ')}`,
+  );
+
+  return new Promise((resolve, reject) => {
+    const proc = spawn(target.command, target.args, {
+      stdio: 'inherit',
+      env: buildAppEnv(),
+    });
+    proc.once('error', (error) => {
+      reject(error);
+    });
+    proc.once('exit', (code) => {
+      resolve(code ?? 0);
+    });
+  });
+}
+
 export function runAppCommandWithInheritLogged(
   appPath: string,
   appArgs: string[],
@@ -786,10 +817,24 @@ export function runAppCommandWithInheritLogged(
 export function launchAppStartDetached(appPath: string, logLevel: LogLevel): void {
   const startArgs = ['--start'];
   if (logLevel !== 'info') startArgs.push('--log-level', logLevel);
-  if (maybeCaptureAppArgs(startArgs)) {
+  launchAppCommandDetached(appPath, startArgs, logLevel, 'start');
+}
+
+export function launchAppCommandDetached(
+  appPath: string,
+  appArgs: string[],
+  logLevel: LogLevel,
+  label: string,
+): void {
+  if (maybeCaptureAppArgs(appArgs)) {
     return;
   }
-  const target = resolveAppSpawnTarget(appPath, startArgs);
+  const target = resolveAppSpawnTarget(appPath, appArgs);
+  log(
+    'debug',
+    logLevel,
+    `${label}: launching detached app with args: ${[target.command, ...target.args].join(' ')}`,
+  );
   const proc = spawn(target.command, target.args, {
     stdio: 'ignore',
     detached: true,

launcher/parse-args.test.ts

@@ -58,3 +58,26 @@ test('parseArgs maps dictionary command and log-level override', () => {
   assert.equal(parsed.dictionaryTarget, process.cwd());
   assert.equal(parsed.logLevel, 'debug');
 });
+
+test('parseArgs maps stats command and log-level override', () => {
+  const parsed = parseArgs(['stats', '--log-level', 'debug'], 'subminer', {});
+
+  assert.equal(parsed.stats, true);
+  assert.equal(parsed.logLevel, 'debug');
+});
+
+test('parseArgs maps stats cleanup to vocab mode by default', () => {
+  const parsed = parseArgs(['stats', 'cleanup'], 'subminer', {});
+
+  assert.equal(parsed.stats, true);
+  assert.equal(parsed.statsCleanup, true);
+  assert.equal(parsed.statsCleanupVocab, true);
+});
+
+test('parseArgs maps explicit stats cleanup vocab flag', () => {
+  const parsed = parseArgs(['stats', 'cleanup', '-v'], 'subminer', {});
+
+  assert.equal(parsed.stats, true);
+  assert.equal(parsed.statsCleanup, true);
+  assert.equal(parsed.statsCleanupVocab, true);
+});

launcher/types.ts

@@ -111,6 +111,9 @@ export interface Args {
   jellyfinPlay: boolean;
   jellyfinDiscovery: boolean;
   dictionary: boolean;
+  stats: boolean;
+  statsCleanup?: boolean;
+  statsCleanupVocab?: boolean;
   dictionaryTarget?: string;
   doctor: boolean;
   configPath: boolean;

package.json

@@ -13,7 +13,9 @@
     "test-yomitan-parser:electron": "bun run build:yomitan && bun build scripts/test-yomitan-parser.ts --format=cjs --target=node --outfile dist/scripts/test-yomitan-parser.js --external electron && electron dist/scripts/test-yomitan-parser.js",
     "build:yomitan": "bun scripts/build-yomitan.mjs",
     "build:assets": "bun scripts/prepare-build-assets.mjs",
-    "build": "bun run build:yomitan && tsc -p tsconfig.json && bun run build:renderer && bun run build:assets",
+    "build:stats": "cd stats && bun run build",
+    "dev:stats": "cd stats && bun run dev",
+    "build": "bun run build:yomitan && bun run build:stats && tsc -p tsconfig.json && bun run build:renderer && bun run build:assets",
     "build:renderer": "esbuild src/renderer/renderer.ts --bundle --platform=browser --format=esm --target=es2022 --outfile=dist/renderer/renderer.js --sourcemap",
     "changelog:build": "bun run scripts/build-changelog.ts build",
     "changelog:check": "bun run scripts/build-changelog.ts check",
@@ -28,6 +30,7 @@
     "docs:build": "bun run --cwd docs-site docs:build",
     "docs:preview": "bun run --cwd docs-site docs:preview",
     "docs:test": "bun run --cwd docs-site test",
+    "test:docs:kb": "bun test scripts/docs-knowledge-base.test.ts",
     "test:config:src": "bun test src/config/config.test.ts src/config/path-resolution.test.ts src/config/resolve/anki-connect.test.ts src/config/resolve/subtitle-style.test.ts src/config/resolve/jellyfin.test.ts src/config/definitions/domain-registry.test.ts src/generate-config-example.test.ts src/verify-config-example.test.ts",
     "test:config:dist": "bun test dist/config/config.test.js dist/config/path-resolution.test.js dist/config/resolve/anki-connect.test.js dist/config/resolve/subtitle-style.test.js dist/config/resolve/jellyfin.test.js dist/config/definitions/domain-registry.test.js dist/generate-config-example.test.js dist/verify-config-example.test.js",
     "test:config:smoke:dist": "bun test dist/config/path-resolution.test.js",
@@ -54,7 +57,7 @@
     "test:launcher": "bun run test:launcher:src",
     "test:core": "bun run test:core:src",
     "test:subtitle": "bun run test:subtitle:src",
-    "test:fast": "bun run test:config:src && bun run test:core:src && bun test src/main-entry-runtime.test.ts src/anki-integration/anki-connect-proxy.test.ts src/release-workflow.test.ts src/ci-workflow.test.ts scripts/build-changelog.test.ts scripts/mkv-to-readme-video.test.ts scripts/update-aur-package.test.ts && bun run tsc && bun test dist/main/runtime/registry.test.js",
+    "test:fast": "bun run test:config:src && bun run test:core:src && bun run test:docs:kb && bun test src/main-entry-runtime.test.ts src/anki-integration/anki-connect-proxy.test.ts src/release-workflow.test.ts src/ci-workflow.test.ts scripts/build-changelog.test.ts scripts/mkv-to-readme-video.test.ts scripts/update-aur-package.test.ts && bun run tsc && bun test dist/main/runtime/registry.test.js",
     "generate:config-example": "bun run src/generate-config-example.ts",
     "verify:config-example": "bun run src/verify-config-example.ts",
     "start": "bun run build && electron . --start",
@@ -81,9 +84,11 @@
   "author": "",
   "license": "GPL-3.0-or-later",
   "dependencies": {
+    "@hono/node-server": "^1.19.11",
     "axios": "^1.13.5",
     "commander": "^14.0.3",
     "discord-rpc": "^4.0.1",
+    "hono": "^4.12.7",
     "jsonc-parser": "^3.3.1",
     "libsql": "^0.5.22",
     "ws": "^8.19.0"
@@ -147,6 +152,7 @@
     },
     "files": [
       "dist/**/*",
+      "stats/dist/**/*",
       "vendor/texthooker-ui/docs/**/*",
       "vendor/texthooker-ui/package.json",
       "package.json",

plugin/subminer/messages.lua

@@ -44,6 +44,9 @@ function M.create(ctx)
 		mp.register_script_message(hover.HOVER_MESSAGE_NAME_LEGACY, function(payload_json)
 			hover.handle_hover_message(payload_json)
 		end)
+		mp.register_script_message("subminer-stats-toggle", function()
+			mp.osd_message("Stats: press ` (backtick) in overlay", 3)
+		end)
 	end
 
 	return {

plugin/subminer/ui.lua

@@ -32,6 +32,7 @@ function M.create(ctx)
 			"Open options",
 			"Restart overlay",
 			"Check status",
+			"Stats",
 		}
 
 		local actions = {
@@ -53,6 +54,9 @@ function M.create(ctx)
 			function()
 				process.check_status()
 			end,
+			function()
+				mp.commandv("script-message", "subminer-stats-toggle")
+			end,
 		}
 
 		input.select({