---
phase: 02-steering-and-checkpoint-durability
plan: 01
subsystem: runtime
tags: [aitp, steering, operator-checkpoint, runtime]
requires:
  - phase: 01-topic-start-hardening
    provides: Stable runtime and topic-start surfaces
provides:
  - checkpoint-answer steering materialization
  - refreshed steering runtime surfaces
affects: [phase-02, operator-checkpoints, steering]
tech-stack:
  added: []
  patterns: [answer-to-steering bridge]
key-files:
  created: []
  modified: [research/knowledge-hub/knowledge_hub/aitp_service.py, research/knowledge-hub/tests/test_aitp_service.py]
key-decisions:
  - "Only steering-style checkpoint answers should auto-materialize steering artifacts."
patterns-established:
  - "Checkpoint closure is not enough when the answer changes route semantics."
requirements-completed: [STEER-01, STEER-02]
duration: 15min
completed: 2026-03-31
---

# Phase 2: Steering And Checkpoint Durability Summary

**Steering-style operator checkpoint answers now materialize durable steering artifacts and refreshed runtime routes**

## Performance

- **Duration:** 15 min
- **Started:** 2026-03-31T05:20:00+08:00
- **Completed:** 2026-03-31T05:35:00+08:00
- **Tasks:** 1
- **Files modified:** 2

## Accomplishments
- Bridged answered steering checkpoints into the existing steering materialization path.
- Ensured redirect-style checkpoint answers write control-note and innovation artifacts.
- Added regression coverage for the end-to-end behavior.

## Task Commits

Each task was completed in the working tree without atomic git commits in this session.

1. **Task 1: Materialize steering from checkpoint answers when appropriate** - `(uncommitted)`

**Plan metadata:** `(retroactive summary)`

## Files Created/Modified
- `research/knowledge-hub/knowledge_hub/aitp_service.py` - checkpoint-answer steering materialization
- `research/knowledge-hub/tests/test_aitp_service.py` - steering checkpoint regression coverage

## Decisions Made
- Not every answered checkpoint should imply steering; only steering-semantic answers should.

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- Strategy memory can now sit on top of a runtime where steering answers actually affect route state.

---
*Phase: 02-steering-and-checkpoint-durability*
*Completed: 2026-03-31*
