# Context Manager Task 3 Implementer Report

## Status
- Done
- Implemented heuristic transcript-slice extraction in `.pi/agent/extensions/context-manager/src/extract.ts`
- Added focused tests in `.pi/agent/extensions/context-manager/src/extract.test.ts`

## Changes
- Added `TranscriptSlice` and `extractCandidates()`.
- Reused `MemoryCandidate`, `MemoryScope`, and `MemorySourceType` from `src/ledger.ts`.
- Added heuristics for:
  - user goal extraction
  - role-aware constraint extraction
  - decision extraction
  - next-step / task extraction
  - file reference extraction
- Kept constraint extraction from duplicating structured `Goal:`, `Decision:`, and `Next:` lines so the output matches the requested candidate set.

## Tests
- Verified red state first:
  - `cd .pi/agent/extensions/context-manager && npx tsx --test src/extract.test.ts`
  - Result: failed with `ERR_MODULE_NOT_FOUND` because `src/extract.ts` did not exist
- Verified green state after implementation:
  - `cd .pi/agent/extensions/context-manager && npx tsx --test src/extract.test.ts`
- Ran full extension test suite:
  - `cd .pi/agent/extensions/context-manager && npm test`

## Files Changed
- Created `.pi/agent/extensions/context-manager/src/extract.ts`
- Created `.pi/agent/extensions/context-manager/src/extract.test.ts`
- Created `.pi/reviews/context-manager-task3-implementer-report.md`

## Self-Review Findings
- The implementation is tightly scoped to extraction only.
- Test coverage matches the task requirements and verifies both user and non-user sources.
- File reference extraction is intentionally heuristic and limited to the requested extensions.

## Concerns
- The provided implementation snippet would also classify `Decision: ... avoid ...` as a constraint; I prevented that duplicate extraction so the required tests pass.
- No other concerns.