Task 4 Boundary Fix Report

Status: DONE
Changes: Updated .pi/agent/extensions/context-manager/src/prune.ts so isBulky() does not count the final empty split segment when content ends with a trailing newline. This keeps exactly-150-line tool output at the non-bulky boundary while preserving the existing byte and over-threshold line behavior. Added a regression test in .pi/agent/extensions/context-manager/src/prune.test.ts covering an old tool result with exactly 150 real lines plus a trailing newline.
Tests:
- cd /home/alex/dotfiles/.worktrees/context-manager-extension/.pi/agent/extensions/context-manager && npx tsx --test src/packet.test.ts src/prune.test.ts → 8 passed, 0 failed
- cd /home/alex/dotfiles/.worktrees/context-manager-extension/.pi/agent/extensions/context-manager && npm test → 24 passed, 0 failed
Files changed:
- .pi/agent/extensions/context-manager/src/prune.ts
- .pi/agent/extensions/context-manager/src/prune.test.ts
- .pi/reviews/context-manager-task4-boundary-fix-report.md
Self-review findings: The fix is narrowly scoped to line counting inside isBulky(), keeps the public API unchanged, and preserves the existing prune-window behavior for bulky vs. non-bulky tool results outside this exact trailing-newline boundary case.
Concerns: None.