# Sprint 261 Execution Tracker - 2026-02-26

## Scope
- `sprint261_plan.md`

## Implemented

New tool:
- `tools/mcp/synthesize_raw_intrinsic_prompt_pack.py`
  - Builds a compact intrinsic prompt pack from top-gap signals.
  - Encodes required ops, executionContract fields, reason keywords, and anti-generic-task constraints.

Pipeline integration in `tools/mcp/run_sprint_taskitem_pipeline.sh`:
- Added:
  - `WSTONE_NATIVE_RAW_INTRINSIC_PROMPT_PACK`
  - `WSTONE_NATIVE_RAW_INTRINSIC_PROMPT_MAX_SIGNALS`
- Added artifacts:
  - `01f_raw_intrinsic_prompt_pack_requirements.json`
  - `01f_raw_intrinsic_prompt_pack_report.json`
- Added summary packet:
  - `native_raw_intrinsic_prompt_pack`

## Validation Artifacts

OFF:
- `logs/taskitem_runs/01a_fallback_intake_spec_20260226_163844/00_summary.json`

ON:
- `logs/taskitem_runs/01a_fallback_intake_spec_20260226_163855/00_summary.json`
- prompt-pack artifacts:
  - `logs/taskitem_runs/01a_fallback_intake_spec_20260226_163855/01f_raw_intrinsic_prompt_pack_report.json`

Observed result on hard sample:
- prompt pack injected with selected signals (`selected_signal_count=8`)
- `selected_variant` remained `0`
- `best_top_gap_score` remained `0`
- `failing_profile_count` remained `1`

## Explicit Completion Signal

- Sprint 261: `DONE` (implemented + validated; intrinsic uplift still pending)