docs(backlog): close TASK-87.4

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

@@ -3,10 +3,10 @@ id: TASK-87
 title: >-
   Codebase health: harden verification and retire dead architecture identified
   in the March 2026 review
-status: To Do
+status: In Progress
 assignee: []
 created_date: '2026-03-06 03:19'
-updated_date: '2026-03-06 03:20'
+updated_date: '2026-03-06 11:11'
 labels:
   - tech-debt
   - tests
@@ -22,6 +22,7 @@ references:
 - src/translators/index.ts
 - src/subsync/engines.ts
 - src/subtitle/pipeline.ts
+  - backlog/tasks/task-87.5 - Dead-architecture-cleanup-delete-unused-registry-and-pipeline-modules-that-are-off-the-live-path.md
 documentation:
   - docs/reports/2026-02-22-task-100-dead-code-report.md
 priority: high
@@ -69,3 +70,10 @@ Shared review context to restate in child tasks:
 - 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 -->
+
+## Progress Notes
+
+- `TASK-87.5` is complete. The isolated dead registry/pipeline modules were re-verified as off the maintained runtime path and removed.
+- Live subtitle tokenization now owns the zero-width separator normalization that previously only existed in the dead subtitle pipeline path, so the cleanup did not drop that behavior.
+- Verification completed for the cleanup slice with `bun test src/core/services/tokenizer.test.ts`, `bun test src/dead-architecture-cleanup.test.ts`, `bun test src/core/services/subsync.test.ts src/subsync/utils.test.ts`, `bun run tsc`, and `bun run test:src`.
+- Remaining parent-task scope still includes the broader verification hardening, `src/main.ts` dead-symbol cleanup, and `src/anki-integration.ts` decomposition work tracked by the other child tasks.

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

@@ -3,10 +3,10 @@ id: TASK-87.4
 title: >-
   Runtime composition root: remove dead symbols and tighten module boundaries in
   src/main.ts
-status: To Do
+status: Done
 assignee: []
 created_date: '2026-03-06 03:19'
-updated_date: '2026-03-06 03:21'
+updated_date: '2026-03-06 18:10'
 labels:
   - tech-debt
   - runtime
@@ -36,10 +36,10 @@ A noUnusedLocals/noUnusedParameters compile pass reports a large concentration o
 
 <!-- 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.
+- [x] #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.
+- [x] #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.
+- [x] #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.
+- [x] #4 Relevant runtime and startup verification commands pass after the cleanup, and any command changes are documented if needed.
 <!-- AC:END -->
 
 ## Implementation Plan
@@ -51,3 +51,13 @@ A noUnusedLocals/noUnusedParameters compile pass reports a large concentration o
 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 -->
+
+## Completion Notes
+
+- Removed the dead import/destructure backlog from `src/main.ts` and deleted stale wrapper seams that no longer owned runtime behavior after the composer/runtime extractions.
+- Tightened module boundaries so the composition root depends on the composed/public runtime surfaces it actually uses instead of retaining unused lower-level domain factory symbols.
+- Cleared the remaining strict `noUnusedLocals`/`noUnusedParameters` failures in nearby touched files required for a clean repo-wide pass: `launcher/commands/playback-command.ts`, `src/anki-integration.ts`, `src/anki-integration/field-grouping-workflow.ts`, `src/core/services/tokenizer/yomitan-parser-runtime.test.ts`, and `src/main/runtime/composers/composer-contracts.type-test.ts`.
+- Verification:
+  - `bunx tsc --noEmit -p tsconfig.typecheck.json --noUnusedLocals --noUnusedParameters --pretty false`
+  - `bun run test:fast`
+- Commit: `e659b5d` (`refactor(runtime): remove dead symbols from composition roots`)