# Context Manager Task 3 Scope Fix Report

## Status
- Done
- Tightened the remaining user-constraint scope heuristic so ambiguous constraint lines stay `branch` scoped.
- Preserved the source-stable subject behavior introduced in the prior Task 3 fix.

## Changes
1. **Narrowed durable session promotion in `.pi/agent/extensions/context-manager/src/extract.ts`**
   - Removed the bare-keyword session promotion behavior for terms such as `MVP` and `context window`.
   - Kept `session` scope promotion limited to clearer durability signals such as `whole session`, `across branches`, `session-wide`, `project-wide`, and similar explicit phrasing.

2. **Strengthened local-scope detection**
   - Treated `this module` / `in this module` as branch-local cues so module-local rename instructions do not leak across branch switches.

3. **Added regression coverage in `.pi/agent/extensions/context-manager/src/extract.test.ts`**
   - Updated the existing extraction expectation so `We must adapt to the active model context window.` remains `branch` scoped.
   - Added explicit regression assertions for the reviewer’s false-positive examples:
     - `We should keep the MVP branch experimental.` → `branch`
     - `We should rename the context window helper in this module.` → `branch`
   - Kept a durable-session control case to verify explicit session phrasing still promotes correctly.

## Tests
- `cd /home/alex/dotfiles/.worktrees/context-manager-extension/.pi/agent/extensions/context-manager && npx tsx --test src/extract.test.ts`
  - Result: 4 tests passed, 0 failed
- `cd /home/alex/dotfiles/.worktrees/context-manager-extension/.pi/agent/extensions/context-manager && npm test`
  - Result: 15 tests passed, 0 failed

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

## Self-Review Findings
- The fix stays narrowly scoped to `inferConstraintScope()` heuristics and targeted regression coverage.
- Public APIs and exported function signatures are unchanged.
- The previously fixed source-stable `subject` generation remains untouched.
- The updated tests cover both the reviewer’s concrete false positives and an existing ambiguous `context window` example.

## Concerns
- Constraint scoping remains heuristic-based by design, so the extractor is intentionally conservative: unclear user constraints now stay `branch` scoped unless the text explicitly signals broader durability.
- No additional blocking concerns found after the targeted and full test runs.