whetstone_DSL/docs/sprint257_execution_tracker_2026-02-26.md

Sprint 257 Execution Tracker - 2026-02-26

Scope

• sprint257_plan.md

Implemented

Pipeline gating enhancement in tools/mcp/run_sprint_taskitem_pipeline.sh:

• Added:
  • WSTONE_NATIVE_RAW_TOP_GAP_REQUIRE_UPLIFT
• Raw candidate search now hard-fails with exit code 18 when:
  • uplift is required but weighted top-gap mode is not configured (WSTONE_NATIVE_RAW_TOP_GAP_WEIGHTED_SELECT=1 + valid backlog file), or
  • best_top_gap_score <= baseline_top_gap_score
• Raw search summary now emits:
  • top_gap_require_uplift

Validation Artifacts

Gate OFF (expected pass):

• logs/taskitem_runs/01a_fallback_intake_spec_20260226_162632/00_summary.json

Gate ON (expected fail):

• logs/taskitem_runs/01a_fallback_intake_spec_20260226_162633/02ae_raw_candidate_search.json
• command exit code: 18

Observed result on hard sample:

• baseline_top_gap_score=0
• best_top_gap_score=0
• with required uplift enabled, run blocked as designed.

Explicit Completion Signal

• Sprint 257: DONE (implemented + enforced no-uplift guard for top-gap policy)