dot-iu-cutter v0.5 — Implementation Readiness Audit Report

Phase: v0_5_implementation_readiness_audit_and_byte_artifact_transport_standard · Nature: analysis_only__no_commit__no_dryrun__no_mutation · Date: 2026-05-18 · doc 5 of 5

audit_status: COMPLETE — readiness consolidated; one recommended path proposed
decision_authority: GPT / User ONLY ; self_advance: PROHIBITED

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1. Executive summary

implementation_code:   READY — cutter_agent/dryrun.py byte-exact f1f42e83…
                       (ACCEPTED by GPT); 7/7 fixture-independent PASS;
                       AST import-isolated (no DB/CUT/VERIFY reachable).
test_suite:            SEMANTICALLY READY — 454d9fc8 ≡ KB doc-2 verbatim
                       line-for-line; hash-of-record (31143968) unrecoverable.
fixture:               BLOCKED — pinned identity 17660443 not byte-reproducible
                       through markdown/MCP text transport (region 86d6aea7,
                       same-width U+2013 substitution; len/markers invariant).
production:            UNTOUCHED — no commit/deploy/dry-run/CUT/VERIFY/DB.
core_finding:          all recurring blockers = byte-sensitive artifacts
                       transported as ordinary markdown. Fix is a transport
                       STANDARD (base64/content-addressed), not another retry.

2. Audit answers to GPT's required questions

which_artifacts_byte_sensitive: dryrun.py (A1, but transports faithfully),
  test file (A2, NOT faithful), pinned fixture (A3, NOT faithful, critical),
  refimpl.r1 (A5, if used). No golden manifest files exist (A4 n/a). [doc 2]
which_must_be_base64: A2 (required), A3 (mandatory), A1 (recommended for
  durability), A5 (if strategy C used). [doc 2 §2]
which_files_allowed_in_repo_for_tests: exactly the 2 authorized additive files
  (cutter_agent/dryrun.py, tests/test_dryrun_snapshot_mark.py) + one
  byte-identity pinned fixture at the test-resolved path. No others. [doc 1/3]
ratify_454d9fc8: YES — recommended (side-by-side ≡ verbatim; dryrun.py
  byte-exact; 7/7 pass; 31143968 unrecoverable). [doc 3 §1.3]
fixture_storage_without_corruption: strategy A — base64 content-addressed blob
  in KB, gated decode, mandatory post-decode region rehash == 17660443. [doc 3 §2.3]
sufficient_CI_before_commit: full 21/21 (incl. TestGate+TestManifest over the
  real pinned region) + sha checks + py_compile; 7/7 is interim-only. [doc 4 §1]
remaining_blockers: B-AUDIT, B-TEST-HASH, B-FIXTURE-IDENTITY, B-FIXTURE-PATH,
  B-CI-GREEN, B-COMMIT, B-DRYRUN-CMDREVIEW, B-RETRY-FREEZE. [doc 4 §2]

3. One consolidated recommended path (NOT executed — for GPT/User ruling)

Step 0  GPT/User ratify THIS audit + the byte-artifact transport standard
        (doc 2); lift B-RETRY-FREEZE under the new standard.
Step 1  GPT/User RATIFY test hash 454d9fc8…f2843a4a as canonical; update KB
        hash-of-record 31143968 → 454d9fc8. (Resolves B-TEST-HASH.)
Step 2  Produce a BYTE-TRUSTED base64 blob of the pinned snapshot artifact —
        base64-encode the on-disk pinned file (NOT retyped text) — store as a
        KB content-addressed blob with decoded_sha256 + region_sha256
        (17660443, len 17522, markers 19/1/1/1) + base64_sha256. Also publish
        the ratified test file (and, recommended, dryrun.py) as base64 blobs.
        (Resolves the transport root cause; enables B-FIXTURE-IDENTITY.)
Step 3  GPT/User rule fixture placement: repo-root path vs tests/fixtures/ +
        matching ART in the ratified test bytes. (Resolves B-FIXTURE-PATH.)
Step 4  In a SEPARATE gated apply phase: on the existing feature branch,
        sha-verified-decode the blobs into the repo; recompute all hashes
        (module f1f42e83 / test ratified / fixture region 17660443) —
        STOP_AND_REPORT on any mismatch (no guessing).
Step 5  Run full CI: python3 -m unittest tests.test_dryrun_snapshot_mark —
        require 21/21 PASS + sha checks + py_compile + no-DB env/AST proof.
        (Resolves B-CI-GREEN.)
Step 6  Request explicit commit approval (only after Step 5 green).
        (Resolves B-COMMIT.)
Step 7  Separately, command-review + explicit authorization for the FIRST
        Constitution dry-run. (Resolves B-DRYRUN-CMDREVIEW.)
note:   Steps are sequential and EACH separately gated. Strategy C
        (regenerate from refimpl.r1) is the documented fallback for Step 2
        ONLY if a byte-trusted base64 cannot be produced.
DO NOT EXECUTE these steps. This is a proposed path for GPT/User ruling.

4. Quality gates

QG1 no mutation                         : PASS — read-only git/shasum, KB reads,
    in-memory hash recompute; 0 repo files written/edited; HEAD 4367c83 & main
    byte-unchanged; the 3 untracked paths untouched.
QG2 all byte-sensitive artifacts classified : PASS — doc 2 table A1–A6 + standard.
QG3 test-hash decision recommendation clear : PASS — ratify 454d9fc8 (doc 3 §1.3).
QG4 fixture strategy recommendation clear   : PASS — strategy A base64 blob,
    tradeoff stated, C fallback (doc 3 §2.3).
QG5 CI standard clear                       : PASS — exact cmds, PASS criteria,
    fixture-bound required, 7/7 interim-only, no-DB proof (doc 4 §1).
QG6 remaining blockers listed               : PASS — 8 blockers (doc 4 §2).
QG7 one consolidated path proposed          : PASS — §3 (7 gated steps).
QG8 stop after uploading 5 files            : PASS — exactly 5 docs; STOP here.

5. Explicit non-execution statement

• No file modification. No patch apply. No fixture write. No git add/commit. No deploy/restart. No first Constitution dry-run. No CUT. No VERIFY. No production DB write. No self-advance.
• cutter_agent/dryrun.py (f1f42e83…) and tests/test_dryrun_snapshot_mark.py (454d9fc8…) and the quarantined non-identity fixture were read only. Only actions: read-only git/shasum, KB document reads, in-memory hashlib/unicodedata recompute (no repo write). Baseline main & HEAD 4367c83 byte-unchanged; fully reversible.
• Exactly 5 docs under …/v0.5-implementation-readiness-audit-byte-artifact-transport/.
• doc 5 of 5 — STOP. Route to GPT / User review for: (R0) ratify audit + transport standard, (R1) ratify test hash 454d9fc8, (R2) authorize Step 2 base64 blob production, (R3) fixture placement ruling. Self-advance PROHIBITED.

Companion docs: current-state (1), byte-artifact-transport-standard (2), test-fixture-mismatch-analysis (3), final-ci-and-blocker-review (4).