# Sprint 249 Execution Tracker - 2026-02-26

## Scope
- `sprint249_plan.md`

## Implemented

Pipeline updates in `tools/mcp/run_sprint_taskitem_pipeline.sh`:
- Added `WSTONE_NATIVE_RAW_CANDIDATE_REQUIRE_UPLIFT` (default `0`).
- `native_raw_candidate_search` now reports:
  - `baseline_failing_profile_count`
  - `best_failing_profile_count`
  - baseline/best task counts
- Added artifact:
  - `02ae_raw_candidate_search.json`
- Added hard-fail behavior (`exit 17`) when uplift is required but not achieved.

## Validation Artifacts

- guard disabled (records no-uplift signal, continues):
  - `logs/taskitem_runs/TEST_ONLY_sprint249_rawguard_20260226_154026/00_summary.json`
- guard enabled (expected hard fail):
  - `logs/taskitem_runs/TEST_ONLY_sprint249_rawguard_20260226_154028/02ae_raw_candidate_search.json`

Observed signal:
- baseline and best both `7` failing profiles (`selected_variant=0`), so no uplift.

## Explicit Completion Signal

- Sprint 249: `DONE` (implemented + expected no-uplift guard behavior verified)