hakorune/docs/development/current/main/phases/phase-29ac/README.md

Phase 29ac: JoinIR thaw plan (Pattern6/7 near-miss → PASS)

Goal: Convert freeze-fixed Pattern6/7 near-miss cases into PASS while keeping contracts intact (no by-name or silent fallback).

Status

• P1 ✅ Pattern6 reverse scan: Plan/Normalizer で受理して PASS
• P2 ✅ Pattern6 matchscan: fixture を contract-aligned に修正して PASS
• P3 ✅ Pattern7 split-scan: near-miss を contract-aligned な OK fixture として PASS 固定（元の契約違反 fixture は残す）

Target list (SSOT)

• Pattern6/7 の OK/contract fixtures 一覧: docs/development/current/main/design/pattern6-7-contracts.md

Outcome

• PASS/contract fixture の一覧は SSOT に集約（上記参照）。
• Phase29ac では split-scan の fixup OK fixture を追加し、契約違反 fixture は維持。

Pass order (recommended)

1. Pattern6 reverse scan
   • Plan/Normalizer: add reverse support (i >= 0, step i = i - 1).
   • Smoke: phase29ab_pattern6_reverse_ok_min now OK PASS (RC=1).
2. Pattern6 matchscan missing step
   • Freeze reason: [joinir/phase29ab/pattern6/contract] scan-with-init contract: missing step update
   • Resolution: add explicit i = i + 1 step in fixture (contract-aligned).
3. Pattern7 split-scan near-miss
   • Resolve then/else update mismatches without relaxing contracts.
   • Freeze reason: [joinir/phase29ab/pattern7/contract] split scan contract: else i update must be \i = i + 1``
   • Resolution: keep the contract-violation fixture as FAIL-Fast, and add a contract-aligned fixup fixture for PASS.

Commands

• ./tools/smokes/v2/run.sh --profile integration --filter "phase29ab_pattern6_*"
• ./tools/smokes/v2/run.sh --profile integration --filter "phase29ab_pattern7_*"
• ./tools/smokes/v2/run.sh --profile integration --filter "phase29ab_pattern7_*"