---
mode: CREATE
adr_id: ADR-0.18.0
branch: main
timestamp: "2026-03-21T00:00:00Z"
agent: claude-code
obpi_id: OBPI-0.18.0-03
session_id:
continues_from: docs/design/adr/pre-release/ADR-0.18.0-subagent-driven-pipeline-execution/handoffs/20260320T143500Z-obpi-02-completed-next-obpis.md
---

<!-- Handoff document for ADR-0.18.0 — created by claude-code at 2026-03-21T00:00:00Z -->

## Current State Summary

OBPI-0.18.0-03 (Two-Stage Review Protocol) pipeline completed successfully. All five stages ran to completion: context loaded from OBPI-02 handoff, implementation completed (8 review protocol functions in `pipeline_runtime.py`, `review_fix_count` field on DispatchRecord, constants `MAX_REVIEW_FIX_CYCLES=2` and `REVIEW_MODEL_MAP`), verification passed (843 tests, 70 OBPI-specific, lint/typecheck clean), human attested "completed", and sync pushed to remote.

## Important Context

- OBPIs 01, 02, 03 are all Completed (3/5).
- OBPIs 04 and 05 remain Pending.
- OBPI-04 (REQ-level parallel verification dispatch) can proceed now.
- OBPI-05 (Pipeline runtime and skill integration) depends on 02, 03, and 04 — blocked until 04 completes.
- ADR-0.18.0 parent lane is Heavy. OBPI-03 was Lite lane.
- `pipeline_runtime.py` is now ~1045 lines — well above the 600-line module limit. OBPI-05 should address this by splitting dispatch/review code into a separate module.
- The `obpi-completion-validator.py` hook requires `### Implementation Summary` and `### Key Proof` sections (h3 headings) with substantive content before allowing status change to Completed.

## Decisions Made

- **Decision:** Removed duplicate `_REVIEW_RESULT_JSON_RE` regex constant, reusing existing `_RESULT_JSON_RE`.
  **Rationale:** Quality reviewer flagged DRY violation; both regex patterns were identical.
- **Decision:** Simplified `review_blocks_advancement()` to a single return expression (SIM103 fix).
  **Rationale:** Pre-existing ruff lint concern.
- **Decision:** Quality criteria in `compose_quality_review_prompt()` are hardcoded, not parameterized.
  **Rationale:** Brief scope is internal protocol; criteria are project constants, not user-configurable.

## Immediate Next Steps

1. Plan and execute OBPI-0.18.0-04 (REQ-level parallel verification dispatch in Stage 3)
2. After 04 completes: OBPI-0.18.0-05 (Pipeline runtime and skill integration)

## Pending Work / Open Loops

- OBPIs 04-05 remain Pending (0/2 remaining completed)
- `pipeline_runtime.py` module size (~1045 lines) should be addressed in OBPI-05
- `ADR-pool.task-level-governance` promotion decision still deferred

## Verification Checklist

- [x] `uv run gz test` passes (843 tests)
- [x] `uv run gz lint` clean
- [x] `uv run gz typecheck` clean
- [x] `uv run -m unittest tests.test_review_protocol -v` passes (70/70)
- [x] `uv run gz obpi reconcile OBPI-0.18.0-03-two-stage-review-protocol` passes
- [x] Branch matches: main
- [x] Changes pushed via `gz git-sync`
- [x] No pipeline markers active
- [x] No OBPI locks active

## Evidence / Artifacts

- `src/gzkit/pipeline_runtime.py` — 8 review protocol functions: should_dispatch_review, select_review_model, compose_spec_review_prompt, compose_quality_review_prompt, parse_review_result, review_has_critical_findings, review_blocks_advancement, handle_review_cycle
- `tests/test_review_protocol.py` — 70 unit tests across 8 test classes
- `docs/design/adr/pre-release/ADR-0.18.0-subagent-driven-pipeline-execution/logs/obpi-audit.jsonl` — attestation and audit ledger entries
