# Agent: `codex-preserve-linebreaks-20260220T063538Z-s4nd`

- alias: `codex-preserve-linebreaks`
- mission: `Add config option to preserve subtitle line breaks in visible overlay rendering.`
- status: `done`
- branch: `main`
- started_at: `2026-02-20T06:35:38Z`
- heartbeat_minutes: `5`

## Current Work (newest first)
- [2026-02-20T06:42:51Z] handoff: TASK-91 complete; added config flag `subtitleStyle.preserveLineBreaks` (default false), renderer token-linebreak alignment path, tests/docs/examples updated.
- [2026-02-20T06:42:20Z] test: `bun run build && node --test dist/config/config.test.js dist/renderer/subtitle-render.test.js` pass (43/43); macOS helper compile falls back due sandboxed Swift cache write.
- [2026-02-20T06:41:07Z] edit: added `alignTokensToSourceText` helper + preserve-line-break render path in `src/renderer/subtitle-render.ts`; state/config plumbing added.
- [2026-02-20T06:39:34Z] test: added config parse/warn coverage + renderer helper newline-segment test.
- [2026-02-20T06:35:38Z] intent: create backlog ticket; implement opt-in config flag default-off; keep current normalization default behavior.
- [2026-02-20T06:35:38Z] progress: located normalization/render paths in `src/core/services/tokenizer.ts` and `src/renderer/subtitle-render.ts`.

## Files Touched
- `docs/subagents/INDEX.md`
- `docs/subagents/agents/codex-preserve-linebreaks-20260220T063538Z-s4nd.md`
- `docs/subagents/collaboration.md`
- `backlog/tasks/task-91 - Add-config-toggle-to-preserve-visible-overlay-subtitle-line-breaks.md`
- `src/types.ts`
- `src/config/definitions.ts`
- `src/config/service.ts`
- `src/config/config.test.ts`
- `src/renderer/state.ts`
- `src/renderer/subtitle-render.ts`
- `src/renderer/subtitle-render.test.ts`
- `docs/configuration.md`
- `config.example.jsonc`
- `docs/public/config.example.jsonc`

## Assumptions
- request targets visible overlay rendering parity with MPV line breaks.
- default behavior must remain whitespace-collapsed for tokenizer/texthooker consistency.

## Open Questions / Blockers
- none.

## Next Step
- done.