---
mode: CREATE
adr_id: ADR-0.18.0
branch: main
timestamp: "2026-03-20T12:03:00Z"
agent: claude-code
obpi_id: OBPI-0.18.0-01
session_id:
continues_from: docs/design/adr/pre-release/ADR-0.18.0-subagent-driven-pipeline-execution/handoffs/20260320T000000Z-pause-for-task-governance.md
---

<!-- Handoff document for ADR-0.18.0 — created by claude-code at 2026-03-20T12:03:00Z -->

## Current State Summary

OBPI-0.18.0-01 (Agent Role Taxonomy and Handoff Protocols) pipeline completed successfully. All five stages ran to completion: context loaded from prior handoff, implementation verified (33/33 tests, 99% coverage, lint and typecheck clean), ceremony presented, human attested "completed", and sync pushed to remote.

The brief is now marked Completed with ledger proof, OBPI receipt emitted, and reconciliation passing.

## Important Context

- The prior session paused OBPI-0.18.0-01 at Stage 4 due to a dependency ordering concern: ADR-0.18.0's dispatch model dispatches "per task" but TASK is not yet a formal entity. The human decided to proceed with attestation in this session.
- `ADR-pool.task-level-governance` remains in pool and is referenced by ADR-0.18.0 but is not a blocking dependency for OBPI-01 (which defines roles, not dispatch).
- OBPIs 02-05 depend on OBPI-01 (now completed). OBPIs 02, 03, 04 can proceed in parallel after OBPI-01. OBPI-05 depends on 02, 03, and 04.
- ADR-0.18.0 parent lane is Heavy; OBPI-01 was Lite lane (internal taxonomy, no external contract change).
- The `obpi-completion-validator.py` hook requires `### Implementation Summary` and `### Key Proof` sections (h3 headings, not h2) with substantive content before allowing status change to Completed.

## Decisions Made

- **Decision:** Proceed with OBPI-0.18.0-01 attestation despite prior pause for TASK governance ordering.
  **Rationale:** OBPI-01 defines role taxonomy which is independent of the TASK entity. The pause was about OBPIs 02-05 dispatch semantics, not OBPI-01 scope.
  **Alternatives rejected:** Continue blocking on ADR-pool.task-level-governance promotion (unnecessary for role taxonomy).

## Immediate Next Steps

1. Determine whether to promote `ADR-pool.task-level-governance` before proceeding with OBPI-02 (implementer dispatch depends on TASK definition)
2. If proceeding without TASK formalization: plan and execute OBPI-0.18.0-02 (Controller/worker Stage 2 dispatch)
3. OBPIs 03 and 04 can be planned in parallel with OBPI-02 if TASK question is resolved
4. Update ADR-0.18.0 OBPI table to reflect OBPI-01 Completed status via `/gz-obpi-sync`

## Pending Work / Open Loops

- OBPIs 02-05 remain Pending (0/4 remaining completed)
- `ADR-pool.task-level-governance` promotion decision deferred to user
- ADR-0.18.0 OBPI table may need sync to reflect OBPI-01 completion
- ADR-0.18.0 is Heavy lane — full Gates 1-4 required at ADR closeout

## Verification Checklist

- [x] `uv run gz test` passes (727 tests)
- [x] `uv run gz lint` clean
- [x] `uv run gz typecheck` clean
- [x] `uv run -m unittest tests.test_roles -v` passes (33/33)
- [x] `uv run gz obpi reconcile OBPI-0.18.0-01-agent-role-taxonomy` 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/roles.py` — role taxonomy data model (four roles, handoff contracts, conflict resolution, tool boundary validation)
- `tests/test_roles.py` — 33 unit tests across 7 test classes
- `.claude/agents/implementer.md` — implementer agent file (write tools, acceptEdits, maxTurns=25)
- `.claude/agents/spec-reviewer.md` — spec compliance reviewer (read-only, maxTurns=15)
- `.claude/agents/quality-reviewer.md` — code quality reviewer (read-only, maxTurns=15)
- `.claude/agents/narrator.md` — narrator agent file (read+bash, maxTurns=10)
- `docs/design/adr/pool/ADR-pool.agent-role-specialization.md` — marked Superseded
- `docs/design/adr/pre-release/ADR-0.18.0-subagent-driven-pipeline-execution/logs/obpi-audit.jsonl` — attestation and audit ledger entries
