chore(workflow): sync backlog state and subagent coordination

Capture backlog task lifecycle updates, archive TASK-34, and add planning artifacts for recent config work. Update docs sweep scripts and AGENTS guidance to use sharded docs/subagents coordination metadata.

docs/subagents/agents/codex-main.md

@@ -0,0 +1,64 @@
+# Agent: codex-main
+
+- alias: planner-exec
+- mission: Track config-gated keybinding task request
+- status: handoff
+- branch: main
+- started_at: 2026-02-19T08:06:28Z
+- heartbeat_minutes: 20
+
+## Current Work (newest first)
+
+- [2026-02-19T08:41:44Z] handoff: created backlog TASK-84 for config-gated keybindings + disabled-feature integration non-loading (Jellyfin example) with tests/docs acceptance criteria.
+- [2026-02-19T08:41:22Z] intent: create backlog task for config-gated keybindings so disabled features become no-ops and feature modules (example: Jellyfin) are not loaded when disabled.
+- [2026-02-19T08:40:53Z] handoff: completed TASK-83 simplification; removed configurable sentence/audio field overrides for Lapis sentence cards and verified.
+- [2026-02-19T08:40:53Z] test: `bun run build && bun run test:config:dist` -> pass (33/33).
+- [2026-02-19T08:38:30Z] intent: implement TASK-83 to remove `isLapis.sentenceCardSentenceField` + `isLapis.sentenceCardAudioField` from config/types/docs and force fixed `Sentence`/`SentenceAudio` in integration.
+- [2026-02-19T08:27:23Z] handoff: completed TASK-69 implementation + verification; backlog TASK-69 set Done with AC/DoD checked.
+- [2026-02-19T08:27:23Z] test: `bun run build && bun run test:config:dist` -> pass (32/32).
+- [2026-02-19T08:27:23Z] progress: hardened legacy ankiConnect migration mapping with validators + warnings in `src/config/service.ts`; added invalid/valid legacy regression tests in `src/config/config.test.ts`; updated migration doc note in `docs/configuration.md`.
+- [2026-02-19T08:23:30Z] intent: user approved TASK-69 plan; start implementation (tests first, then validated legacy mapping, then verify + backlog updates).
+- [2026-02-19T08:21:11Z] handoff: completed TASK-38 implementation + verification; updated Backlog acceptance checks and notes.
+- [2026-02-19T08:21:11Z] test: `bun run build && node --test dist/config/config.test.js dist/core/services/app-ready.test.js` -> pass (39/39).
+- [2026-02-19T08:21:11Z] progress: wired strict startup parse failure handling + warning summary + critical validation dialog path in `src/main.ts` and threaded new app-ready dependency in `src/main/app-lifecycle.ts`.
+- [2026-02-19T08:20:00Z] intent: read TASK-69 details, write end-to-end implementation plan via writing-plans skill, then execute via executing-plans skill with parallel subagents where possible.
+- [2026-02-19T08:18:47Z] progress: implemented unknown top-level config warning + `ankiConnect.openRouter` deprecation warning; added coverage in `src/config/config.test.ts`; verification passed (`bun run build && node --test dist/config/config.test.js`).
+- [2026-02-19T08:10:40Z] intent: implement TASK-38 plan Task 1 scope (`src/config/service.ts`, `src/config/config.test.ts`) for unknown top-level key warnings + `ankiConnect.openRouter` deprecation warning, then run required build+test command.
+- [2026-02-19T08:09:46Z] progress: wrote plan `docs/plans/2026-02-19-task-38-config-validation-startup.md`, set TASK-38 In Progress, and stored plan in Backlog.
+- [2026-02-19T08:06:28Z] intent: read backlog/task context, draft implementation plan for TASK-38, then execute with parallel subagents where possible.
+
+## Files Touched
+
+- `docs/subagents/INDEX.md`
+- `docs/subagents/agents/codex-main.md`
+- `backlog/tasks/task-84 - Gate-feature-dependent-keybindings-behind-config-flags.md`
+- `src/config/service.ts`
+- `src/config/config.test.ts`
+- `src/core/services/startup.ts`
+- `src/core/services/app-ready.test.ts`
+- `src/main.ts`
+- `src/main/app-lifecycle.ts`
+- `docs/plans/2026-02-19-task-38-config-validation-startup.md`
+- `docs/plans/2026-02-19-task-69-legacy-config-migration-hardening.md`
+- `docs/configuration.md`
+- `src/types.ts`
+- `src/config/definitions.ts`
+- `src/anki-integration.ts`
+- `config.example.jsonc`
+- `docs/public/config.example.jsonc`
+- `docs/anki-integration.md`
+- `docs/mining-workflow.md`
+- `backlog/tasks/task-83 - Simplify-isLapis-sentence-card-field-config-to-fixed-field-names.md`
+- `backlog/tasks/task-38 - Add-user-friendly-config-validation-errors-on-startup.md`
+
+## Assumptions
+
+- AGENT_ID/AGENT_ALIAS env vars are unset; using stable fallback `codex-main` / `planner-exec` for this run.
+
+## Open Questions / Blockers
+
+- none
+
+## Next Step
+
+- Await user prioritization / implementation request for TASK-84.