# Sprint 239 Execution Tracker - 2026-02-26

## Scope
- `sprint239_plan.md`

## Implemented

Pipeline updates in `tools/mcp/run_sprint_taskitem_pipeline.sh`:
- Added `WSTONE_NATIVE_REASON_ENRICHMENT` (default `1`).
- Added deterministic enrichment of native task `reasons` from semantic requirement kinds.
- Added summary packet:
  - `native_reason_enrichment`

## Baseline A/B Smoke

- enrichment enabled run:
  - `logs/taskitem_runs/TEST_ONLY_sprint239_reason_enrich_20260226_145442/00_summary.json`
- enrichment disabled run:
  - `logs/taskitem_runs/TEST_ONLY_sprint239_reason_enrich_20260226_145443/00_summary.json`

Observed delta:
- `native_semantic_signal_count: 0 -> 6`

Fallback audit artifact for this slice:
- `logs/taskitem_runs/TEST_ONLY_sprint239_semantic_fallback_audit_20260226/semantic_fallback_summary.json`

## Explicit Completion Signal

- Sprint 239: `DONE` (implemented + A/B smoke verified)