whetstone_DSL/docs/sprint217_221_execution_tracker_2026-02-26.md

Sprint 217-221 Execution Tracker - 2026-02-26

Scope

Executed sprint plans:

• sprint217_plan.md
• sprint218_plan.md
• sprint219_plan.md
• sprint220_plan.md
• sprint221_plan.md

Observed run directories from sprint runner:

• logs/taskitem_runs/sprint217_plan_20260226_124842
• logs/taskitem_runs/sprint218_plan_20260226_124842
• logs/taskitem_runs/sprint219_plan_20260226_124843
• logs/taskitem_runs/sprint220_plan_20260226_124843
• logs/taskitem_runs/sprint221_plan_20260226_124844

Important status note:

• These sprint-run summary files report total=0 and do not constitute validated execution closure by themselves.

Implemented Changes

Sprint 217-221 (contract-gate tranche)

• tools/mcp/run_project_benchmark_matrix.sh
  • enforces multi-file required-artifact contract for constrained tasks.
  • validates category-specific fullstack contracts:
    • fullstack_api_evolution: compatibility window required.
    • state_migration: rollback + data_loss_allowed=false required.
    • security_propagation: deny_by_default=true required.
    • performance_budgeted_change: SLO p95 required.
    • rollout_choreography: staged + auto-abort-on-error-budget-breach required.
  • emits deterministic strict blockers (fullstack_contract_invalid:<reason>).
• tools/mcp/analyze_fullstack_contract_closure.py
  • closure report generation by category with invalid-rate + AB/Prod readiness.

Integration summaries

Added:

• editor/src/Sprint217IntegrationSummary.h
• editor/src/Sprint218IntegrationSummary.h
• editor/src/Sprint219IntegrationSummary.h
• editor/src/Sprint220IntegrationSummary.h
• editor/src/Sprint221IntegrationSummary.h

Validation Runs (Meaningful Evidence)

Primary production-enabled validation:

• logs/taskitem_runs/challenging_fullstack_multifile_20260226_r5/summary.json
• logs/taskitem_runs/challenging_fullstack_multifile_20260226_r5/results.jsonl
• logs/taskitem_runs/challenging_fullstack_multifile_20260226_r5/fullstack_contract_closure.json

Headline metrics from r5:

• AB path readiness: 6/12 (50%) for Path A and Path B.
• Production loop readiness: 12/12 (100%).
• fullstack_contract.invalid_runs=0 under strict mode.
• false_green_candidates=0 (production evidence-complete criteria).
• ab_prod_divergence_count=6 (all six C++ rows).

Explicit Completion Signal

• Sprints 217-221 implementation: IMPLEMENTED
• Sprints 217-221 robustness closure: PARTIAL

Reason for PARTIAL:

• Contract gating is now enforced and validated.
• However, hard-suite behavior still shows major AB-vs-production divergence in C++ paths; this is not production-closure equivalent for deterministic generator parity.

Follow-on Parity Recheck (r6)

• logs/taskitem_runs/challenging_fullstack_multifile_20260226_r6/summary.json
• parity mode enabled via REQUIRE_AB_PARITY=1
• result:
  • ab_prod_divergence_count=0 (unresolved divergence eliminated)
  • ab_consistency_blocked_count=6 (all six C++ rows blocked by parity gate)
  • production ready reduced to 6/12 (Python-only readiness)