---
mode: CREATE
adr_id: ADR-0.0.63
branch: main
timestamp: "2026-05-29T09:15:42Z"
agent: claude-code
obpi_id: OBPI-0.0.63-01
session_id: salvation-phase-i-adr-0.0.63
continues_from: 20260529T074628Z-obpi07-plus-handoff-system-repair.md
---

<!-- Token-block register fields (HandoffFrontmatter forbids them as keys; kept in body per
     token-block-discipline § Register-Entry Minimum-Information Rule "in frontmatter or body"):
     last commit SHA at handoff: d16c0e40 ; branch state: main, synced with origin/main, dirty=False ;
     OBPI-0.0.63-01 lock claimed + released this session. -->

## Current State Summary

**OBPI-0.0.63-01 (step-advance-gate-5-enforcement): COMPLETE — attested, synced.** ADR-0.0.63 is now **3/7** (01, 02, 07 `attested_completed`; 03, 04, 05, 06 `pending`/`draft`).

Ran the full `gz-plan-audit` → `gz-obpi-pipeline` ceremony for OBPI-01, the **BI-3 anchor**. The closeout ceremony's Step 6 (ATTESTATION) → Step 7 (CLOSEOUT) transition is now a **ledger-gated edge** instead of a blind step-counter advance — finding F1's Gate-5 self-advance bypass is closed.

- **Implementation** (`src/gzkit/commands/closeout_ceremony.py`, commit `5979a47d`): `_advance_ceremony` and `_record_attestation` both delegate to one shared `_commit_advance`, which calls `_gate_attestation_boundary` → `_has_fresh_attestation_receipt`. The gate fail-closes the 6→7 edge (`PolicyBreachError`, exit 3) unless an `attested` ledger event for the ADR exists with `ts >= state.started_at` (parsed with `datetime.fromisoformat`, compared as datetimes — never string-compared). `--attest` emits that receipt via the existing `attested_event` surface, then crosses (pass-path); bare `--next` at Step 6 fail-closes (fail-path). Added `_classify_attestation_verdict` (minimal inline verdict→status, mirrors `closeout.py::_parse_ceremony_attestation_text`).
- **Tests**: `tests/test_closeout_ceremony_cmd.py::TestCeremonyGate5Enforcement` (3 REQ-derived tests; verified RED→GREEN). Full ceremony cmd suite 37/37; adjacent suites 55/55.
- **Brief authored** (was a scaffold): real Objective, REQs with `[kind]` tags, Non-Goals, Demo, Verification.
- **Behave waiver** added (`data/behave_coverage_waivers.json`): REQ-01..04 deferred to ADR-0.0.63 closeout (sibling OBPI-02 / 0.0.59-03 pattern).
- Completed via `gz obpi complete … --attestor-present --accept-uncovered REQ-0.0.63-01-04` (structural-fence). Two git-syncs; tree clean, synced with origin.

Last action succeeded: `gz git-sync --apply` reported `dirty=False`, ahead=0 behind=0.

## Important Context

- **The closeout ceremony now emits a ledger `attested` event at Step 6 `--attest`.** This is a *transitional double-emit* with the Step-7 `gz closeout` pipeline (`closeout.py:504`, which already consumes the ceremony verdict via `_consume_ceremony_attestation`, GHI #351). Collapsing the two emission paths to a single source is **OBPI-0.0.63-05 (dual-runtime-collapse / BI-2)** — explicitly scoped there, NOT a defect. The double-emit is tolerable: `attested` is an idempotent boolean graph flag (`ledger.py:589`); `version_sync` reads the latest event (Step-7 wins, `version_sync.py:203`); presence-based audits are satisfied either way.
- **BI-3 is the OBPI-01 structural fence.** Both `--next` and `--attest` route through one ledger-gated `_commit_advance`. OBPI-03 (proof-binding) and OBPI-06 (req-evidence) are declared to *consume* this gate — build on `_commit_advance` / `_has_fresh_attestation_receipt`, do not fork a second advance path.
- **Scope discipline held**: only the 6→7 edge was gated. ADR Decision-1's "each step transition reads ledger state" is the cross-OBPI vision; gating edges 1-5/7-11 would be gold-plating (other edges cross no attestation gate).
- **Design rationale**: settled across two advisor passes. Approach A (state-check) was rejected — it produces no ledger-gated edge and fails BI-3. B2 (`--attest` emits but does not advance) was rejected — two operator commands violates Operator Economy of Effort. B1-hybrid (shared gated advance; `--attest` stays single-command, exercises the pass-path) won.
- **Completion mechanics for heavy/foundation**: non-TTY `gz obpi complete` needs `--attestor-present` (co-presence proxy via the active pipeline marker) for `--accept-uncovered`; the operator's Stage-4 "attest completed" is the Gate-5 attestation (`attestation_type: operator-verbatim-conversational`).
- **Validator gotcha (cost a precomplete cycle)**: `obpi.py::_is_placeholder` substring-matches `"one-sentence"` — leaving the scaffold comment `<!-- One-sentence concrete outcome… -->` in the `## Objective` section trips "non-substantive Objective". Strip scaffold comments from authored sections.
- **All prior-handoff Important Context still applies** (chained predecessor): handoff-system doctrine conflict UNRESOLVED (pool ADR `ADR-pool.handoff-system-consolidation`); gz-session-handoff programmatic API is vaporware (only `gzkit.handoff_validation.validate_handoff_document` is real — this handoff was gated through it); skill-invocation discipline.

## Decisions Made

- **Decision:** Reuse the existing `attested_event` ledger surface for the Step-6 `--attest` emission rather than minting a new ceremony-event type. **Rationale:** BI-2 forbids `--attest` becoming a *parallel emitter*; reusing the surface keeps OBPI-05's collapse a de-dup, not a merge. **Alternatives rejected:** new `ceremony_attested` event type (parallel-emitter, violates BI-2); state-file-only check (Approach A, fails BI-3).
- **Decision:** Gate freshness on event `ts >= run started_at` (datetime-parsed), no nonce/attempt field. **Rationale:** any event emitted during this run necessarily postdates the run start, so prior-closeout / prior-`--restart` receipts are correctly ignored without a schema change. **Alternative rejected:** adding an anchor/nonce field to `AttestedEvent` (unnecessary schema churn).
- **Decision:** Behave coverage waiver for REQ-01..04, deferring end-to-end ceremony BDD to ADR-0.0.63 closeout. **Rationale:** the gate's CLI exit-code/state semantics are proven by REQ-derived unittest (readiness boundary mocked per Unit-tier contract); the genuine end-to-end behave exercises OBPI-01+02+05 together over one full walkthrough — cross-OBPI integration that lands at ADR closeout. Matches sibling OBPI-02 / 0.0.59-03. **Alternative rejected:** authoring a heavy full-ceremony Gherkin now (premature; integration surface incomplete until OBPI-05).
- **Decision:** Inline `_classify_attestation_verdict` rather than import `closeout.py::_parse_ceremony_attestation_text`. **Rationale:** `closeout.py` imports *from* `closeout_ceremony` (importing back is circular) and is outside OBPI-01's Allowed Paths. **Alternative rejected:** moving the parser to a shared module (touches `closeout.py`, scope creep; OBPI-05 unifies the emission paths anyway).

## Immediate Next Steps

1. **OBPI-0.0.63-03 (evidence-summary-and-proof-binding)** — next in the ADR thread. Adds a REQ column to the Evidence Summary Template (`.gzkit/skills/gz-adr-closeout-ceremony/SKILL.md:285-339`) + new `gz validate --closeout-proof-binding` validator (exit 3 on missing REQ↔receipt-ID bindings). Consumes the OBPI-01 gate. Run `/gz-plan-audit OBPI-0.0.63-03` then the `gz-obpi-pipeline` skill. NOTE: this is a NEW CLI validator surface (heavy) — `gz cli audit` must stay green (manpage + index + command doc for `--closeout-proof-binding`).
2. **Then in order:** 05 (dual-runtime-collapse — collapses the OBPI-01 double-emit; BI-2) → 06 (req-evidence-schema — resolve the `req_evidence` schema blocker noted in the chained predecessor) → 04 (closeout-skill reverify wording fix) → `gz-adr-closeout-ceremony` for ADR-0.0.63.
3. **Before each Stage 5:** pre-commit src/tests with a `Task:` trailer (`gz validate --commit-trailers` requires it for src/tests scope), then complete via `gz obpi complete <id> --attestor "Jeffry Babb" --attestor-present` (+ `--accept-uncovered <REQ> --accept-uncovered-reason …` for any STRUCTURAL-FENCE REQ).
4. **Audit each remaining OBPI `## Demo`** for exit-0 + shell-less (BI-1) closeout-binding safety before ADR closeout.

## Pending Work / Open Loops

- **4 OBPIs remain in ADR-0.0.63:** 03, 04, 05, 06.
- **Pre-existing repo-wide `gz check` failure (NOT this ADR):** GHI #561 — `ADR-0.0.64` `REQ-0.0.64-05-06` lacks a `gz validate --<scope>` citation → `--req-kind-discipline` fails. Confirmed still failing this session. Will block ADR-0.0.63 closeout's quality pipeline; needs the 0.0.64 owner. Do NOT blind-fix.
- **GHI #565** — 40 pre-existing brief `## Verification` compound-command violations the OBPI-07 gate surfaces; precondition for promoting `--brief-command-shape` to default `gz check`.
- **`ADR-pool.handoff-system-consolidation`** — parked backlog (handoff-system API build = its OBPI-02).
- **GHIs to close at ADR-0.0.63 closeout:** #539, #540 (OBPI-02), #550 (OBPI-07), #516 (per OBPI-01/03), #517 (parent diagnosis).
- **`_extract_gz_verb_chain` positional-capture demo-loss bug** — tracked in `agent-insights.jsonl`; route at closeout.

## Verification Checklist

- [ ] `git branch --show-current` returns `main`; tree clean, synced with origin
- [ ] `uv run gz adr status ADR-0.0.63-closeout-ceremony-runtime-engine-parity` shows 01, 02, 07 `attested_completed`; others `pending`/`draft` (3/7)
- [ ] `uv run -m unittest tests.test_closeout_ceremony_cmd` → 37 pass (incl. `TestCeremonyGate5Enforcement` 3)
- [ ] `uv run gz obpi reconcile OBPI-0.0.63-01-step-advance-gate-5-enforcement` → PASS (ATTESTED COMPLETED, proof recorded)
- [ ] `python -c "from gzkit.handoff_validation import validate_handoff_document"` imports cleanly (handoff API still vaporware — use this validator)

## Evidence / Artifacts

- `src/gzkit/commands/closeout_ceremony.py` — `_commit_advance`, `_gate_attestation_boundary`, `_has_fresh_attestation_receipt`, `_classify_attestation_verdict` (commit `5979a47d`)
- `tests/test_closeout_ceremony_cmd.py` — `TestCeremonyGate5Enforcement` (3 REQ-derived tests)
- `data/behave_coverage_waivers.json` — OBPI-0.0.63-01 behave waiver (REQ-01..04 → ADR closeout)
- `docs/design/adr/foundation/ADR-0.0.63-closeout-ceremony-runtime-engine-parity/obpis/OBPI-0.0.63-01-step-advance-gate-5-enforcement.md` — authored brief (status `completed`, evidence recorded)
- `docs/design/adr/foundation/ADR-0.0.63-closeout-ceremony-runtime-engine-parity/handoffs/20260529T074628Z-obpi07-plus-handoff-system-repair.md` — chained predecessor
- ARB receipts: `arb-step-unittest-70435b6035a6461689534fd5834e87ba`, `arb-ruff-0978e2824deb4f95ad1608af4a72e59b`, `arb-step-typecheck-f3919ac1ddd44d1eaa6a7ae9bae6263b`, `arb-step-mkdocs-51f62c6aa48b41eb8a7733ab06baa36e`

## Environment State

Python 3.13 / uv. Model: Opus 4.8. No feature branch — work lands on `main` via `gz git-sync`.
