chore(task-85): update launcher workflow and backlog tracking

docs/subagents/agents/codex-nplusone-pos1-20260220T012300Z-c5he.md

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+# Agent Log — codex-nplusone-pos1-20260220T012300Z-c5he
+
+- alias: `codex-nplusone-pos1`
+- mission: `Fix N+1 false-negative when known sentence fails due to Yomitan functional token counting`
+- status: `completed`
+- started_utc: `2026-02-20T01:23:00Z`
+- heartbeat_minutes: `5`
+
+## Intent
+
+- reproduce user-reported case: known `私/あの/欲しい`, unknown `仮面`, no N+1 color
+- add failing regression test first
+- patch N+1 candidate filter to ignore functional `pos1` from MeCab enrichment for Yomitan tokens
+- run focused tests
+
+## Planned Files
+
+- `src/core/services/tokenizer.test.ts`
+- `src/token-merger.ts`
+
+## Assumptions
+
+- issue path: Yomitan tokens have `partOfSpeech=other`; candidate exclusion relies mostly on `partOfSpeech`
+- MeCab enrichment supplies `pos1`; N+1 filter currently underuses it
+
+## Progress
+
+- 2026-02-20T01:23:00Z: started; context loaded; preparing RED test
+- 2026-02-20T01:28:02Z: RED confirmed; new regression test fails (`targets.length` expected 1, got 0)
+- 2026-02-20T01:28:14Z: GREEN confirmed; patched N+1 candidate filter to ignore functional `pos1` (`助詞`,`助動詞`,`記号`,`補助記号`); tokenizer test file all pass
+
+## Files Touched
+
+- `src/core/services/tokenizer.test.ts`
+- `src/token-merger.ts`
+- `docs/subagents/INDEX.md`
+- `docs/subagents/agents/codex-nplusone-pos1-20260220T012300Z-c5he.md`
+
+## Handoff
+
+- regression covered for user-reported case pattern (`私も あの仮面が欲しいです` with known `私/あの/欲しい`)
+- no blockers