dot-iu-cutter v0.4 — LedgerWriter Schema-Binding CODE Completion Report

Date: 2026-05-17 · Phase: v0.4 LedgerWriter Schema-Binding CODE AUTHORING (GPT-authorised after the 9-doc design package r1+r2 PASS). Code SSOT = VPS /opt/incomex/dot.

1. Outcome

Implemented the GPT-PASSed schema-binding design. The abstract LedgerWriter rows now emit the deployed cutter_governance column shape; MARK idempotency is a deterministic primary-key lookup; SWEEP uses a config-driven deterministic keyset cursor; entry→manifest→review lineage uses the real source_doc_ref join (SB-DEC-1). Column-level binding only — 5-phase flow MARK→SWEEP→REVIEW→CUT→VERIFY, principal routing, isolation, append-only invariants, and the verification-plan r3 15-row baseline are all unchanged. No schema migration, no index DDL, no production connection, no dry-run.

2. Required implementation — status

#	Requirement	Status
1	Rebind 9 mismatch row-builders	✅ ledger.py: append_history, append_sweep_log, write_manifest_envelope, write_manifest_unit_block, write_review_decision, write_signature, write_cut_change_set, write_affected_row, write_verify_result (append_dependency bound too for completeness; append_entry/cas/stamp were already MATCH)
2	Centralised schema_binding.py	✅ vocabulary + sentinels + lane/kind maps + deterministic key builders + config knobs + vocabulary registry
3	Preserve flow	✅ MARK→SWEEP→REVIEW→CUT→VERIFY unchanged
4	Preserve r3 15-row baseline	✅ InMemory probe: exact {entry1,history5,dependency0,sweep_log1,envelope1,unit_block1,review_decision1,dot_pair_signature2,cut_change_set1,affected_row1,verify_result1,alias0} total 15, status verified_complete
5	Server-side MARK idempotency lookup	✅ deterministic entry_id = uuid5(ns, idempotency_key) ⇒ replay is a primary-key find(entry_id=…) (server-side, indexed at any scale; no db_adapter.py change, no migration, no index DDL)
6	Config-driven deterministic keyset sweep cursor	✅ per-status server-side read, ordered by (emitted_at, entry_id), bounded by clamped env knob DOT_CUTTER_SWEEP_BATCH
7	No fixed batch size	✅ env-driven, clamped [1,10000], fail-safe default
8	No hardcoded IP/DSN/password/container/vector collection	✅ none; asserted by a new test scanning schema_binding.py
9	No runtime table/column assumptions without schema-contract tests	✅ static fixture + per-writer contract tests
10	Static schema-contract fixture	✅ tests/_schema_contract_fixture.py (12 tables, columns + NN-no-default; committed test data)
11	Per-writer contract tests	✅ canonical + force_fail + re-review flows, set-equality (no DDL string compare)
12	Vocabulary-registry tests	✅ registry↔constants, key builders, config clamp, no-hardcode scan
13	Targeted InMemory fixture test updates	✅ test_phase_contracts.py: lane→signer_dot_id + payload_envelope.signer_identity; outcome→verdict (2 minimal faithful edits)
14	Full unittest suite passes	✅ 101/101 OK on VPS py3.12 (92 prior + 9 new)

3. Scope & boundary compliance

• Files changed (scoped, exactly 6): cutter_agent/schema_binding.py (new), cutter_agent/ledger.py, cutter_agent/phases.py, tests/_schema_contract_fixture.py (new), tests/test_schema_binding_contract.py (new), tests/test_phase_contracts.py.
• Untouched (as mandated): db_adapter.py, state_machine.py, idempotency.py, signing.py, signal.py, cli.py — no changes needed (the deterministic-PK idempotency design avoided any adapter change).
• NOT done (excluded): no cutter_governance schema migration; no index DDL; no JSONB normalization DDL; no vector integration; no PG-backed dry-run; no production connection/secret/CUT/VERIFY; no deploy/restart.
• No "schema cannot represent semantics" blocker was encountered — every deployed NOT-NULL-no-default column was filled from a deterministic, semantically-correct source per the design.

4. Git SSOT proof

• Branch: main
• Parent commit: 56d3732cb74d07546c938242180a434ed1067a9a
• New commit: 84c52c57aa296de921998910d85b0d4a85ad0746
• Files changed: 6 (6 files changed, 730 insertions(+), 75 deletions(-)) — list in §3.
• git status --short -- iu-cutter after commit: empty (clean).
• Scoped add: explicit 6 paths only; no git add -A; no unrelated WIP.
• Test command & result: python3 -m unittest discover -s tests → Ran 101 tests … OK on VPS py3.12. Count-invariance probe (InMemory, no DB): r3 15-row baseline matched exactly, terminal status verified_complete.

5. Verdict & next gate

• Schema-binding code: complete, accepted-locally (101/101), r3-count-invariant, ready for GPT code review.
• PG-backed dry-run resume condition: after GPT review PASS of this code cycle, the PG-backed dry-run resumes using command-review r1 + verification-plan r3 unchanged (single-IU canonical; binding count-invariant; no index/migration needed for the dry-run itself). Pre-scale additive index-only DDL + JSONB idempotency-key graduation remain separate later GPT-gated cycles, not dry-run prerequisites.
• No self-advance: no dry-run, no provisioning, no production connection performed or implied here. Next = GPT review of commit 84c52c5 + this report.