dotfiles/.pi/reviews/context-manager-task5-implementer-report.md

Context Manager Task 5 Implementer Report

Status

• Completed Task 5.
• Required tests pass.
• Full extension test suite passes.

What you implemented

• Added src/summaries.ts with:
  • buildCompactionSummary()
  • buildBranchSummary()
  • buildResumePacket()
• Added src/persist.ts with:
  • SNAPSHOT_ENTRY_TYPE
  • RuntimeSnapshot
  • serializeSnapshot()
  • deserializeLatestSnapshot()
• Added src/runtime.ts with createContextManagerRuntime() to:
  • ingest transcript slices via extractCandidates() + mergeCandidates()
  • observe token pressure via zoneForTokens()
  • build packets via buildContextPacket()
  • expose compaction, branch, and resume summaries
  • update mode and context window
  • snapshot and restore runtime state
• Added the required tests for summaries, persistence, and runtime.

What you tested and results

1. Confirmed the new tests initially failed because the new source files did not exist.
   • Command: cd .pi/agent/extensions/context-manager && npx tsx --test src/summaries.test.ts src/persist.test.ts src/runtime.test.ts
   • Result: failed with ERR_MODULE_NOT_FOUND for summaries.ts, persist.ts, and runtime.ts
2. Ran the required Task 5 tests after implementation.
   • Command: cd .pi/agent/extensions/context-manager && npx tsx --test src/summaries.test.ts src/persist.test.ts src/runtime.test.ts
   • Result: 5/5 passing
3. Ran the full extension test suite.
   • Command: cd .pi/agent/extensions/context-manager && npm test
   • Result: 29/29 passing

Files changed

• Created .pi/agent/extensions/context-manager/src/summaries.ts
• Created .pi/agent/extensions/context-manager/src/persist.ts
• Created .pi/agent/extensions/context-manager/src/runtime.ts
• Created .pi/agent/extensions/context-manager/src/summaries.test.ts
• Created .pi/agent/extensions/context-manager/src/persist.test.ts
• Created .pi/agent/extensions/context-manager/src/runtime.test.ts
• Created .pi/reviews/context-manager-task5-implementer-report.md

Self-review findings

• Implementation matches the task-provided API and file list.
• Reused existing config, ledger, extract, and packet modules as requested.
• Kept scope to Task 5 only; did not start Task 6.
• Verified the red/green cycle for the new tests.

Any concerns

• No functional concerns from this task.
• There are unrelated untracked review files already present in .pi/reviews/; they were not included in this task’s changes.