# Context Manager Task 4 Fix Report

## Status
- Fixed
- Packet trimming now selects facts under the cap instead of skipping whole sections.
- Targeted packet/prune tests and the full package test suite pass.

## Changes
- Updated `.pi/agent/extensions/context-manager/src/packet.ts` to:
  - score active facts globally with the existing kind weights
  - select facts one at a time under `packetTokenCap`
  - render the final packet in the existing stable section order
  - keep per-section bullet ordering priority-based
- Replaced the weak packet test in `.pi/agent/extensions/context-manager/src/packet.test.ts` with cap-edge assertions that check exact output and prove:
  - a tight cap keeps the highest-priority fact from a partially fitting section
  - cross-kind weights prefer `activeTask` over `decision` when only one can fit
- Expanded `.pi/agent/extensions/context-manager/src/prune.test.ts` to cover:
  - old bulky tool results being pruned
  - recent bulky tool results being preserved
  - old non-bulky tool results being preserved
  - the `recentUserTurns` boundary behavior

## Tests
- Red check before the packet fix:
  - `cd .pi/agent/extensions/context-manager && npx tsx --test src/packet.test.ts`
  - Result: 2 failing packet tests, showing whole-section trimming and cross-kind selection problems
- Focused verification:
  - `cd .pi/agent/extensions/context-manager && npx tsx --test src/packet.test.ts src/prune.test.ts`
  - Result: 6/6 passing
- Full package verification:
  - `cd .pi/agent/extensions/context-manager && npm test`
  - Result: 22/22 passing

## Files Changed
- `.pi/agent/extensions/context-manager/src/packet.ts`
- `.pi/agent/extensions/context-manager/src/packet.test.ts`
- `.pi/agent/extensions/context-manager/src/prune.test.ts`
- `.pi/reviews/context-manager-task4-fix-report.md`

## Self-Review Findings
- The packet builder now applies weights meaningfully across kinds because selection happens from a global priority list before rendering.
- Rendered output still uses the original section headings and section order.
- `prune.ts` behavior did not need logic changes; the missing boundary coverage is now explicit in tests.

## Concerns
- None.