FIX7 Executable Artifact Evidence Report

• Date: 2026-06-10 · Object ID: TKT-OBJ-054 · provisional-non-authority, evidence-only · Codex: NOT consulted
• Evidence root (hash-bound): …/packets/fix7-codex-recheck-9-2026-06-10/ (README §3–§7).

1. Artifact existence proof (the recheck-8 L1/L3 root cause)

artifact	recheck-8	now	sha256
canonicalizer-fix7-canon-v1-ssot.md (SSOT source)	EXISTS	EXISTS (KB rev1)	local copy 8f80f9…
canonicalizer-fix7-canon-v1-ssot.py (declared runnable)	ABSENT → exit 2	MATERIALIZED via byte-extraction; runs; exit 0	9355f0… (10550 bytes)
materialize_canonicalizer.py (extraction command)	n/a	NEW	b854d1…
fix7_canon_v1_ssot_extended.py (production-complete)	n/a	NEW; 36/36 PASS; runnable from KB	196d98…

2. Materialization command (P1) — reproducible

python3 materialize_canonicalizer.py reads the SSOT .md, slices the first ```​python fence, writes the declared .py. Output: extracted_bytes: 10550, py_sha256: 9355f076…. The .md is the single canonical source; the .py is a derived materialization (no duplicate authority). This converts L1/L3 "file absent / exit 2" → "file present / exit 0".

3. Command-execution proof

command	cwd	exit	result
python3 materialize_canonicalizer.py	/tmp/fix7-canon	0	wrote .py, py_sha256 9355f0…
python3 canonicalizer-fix7-canon-v1-ssot.py --selftest	/tmp/fix7-canon	0	22/22 PASS; membership reproduced
shasum -a 256 membership_input.bin	/tmp/fix7-canon	0	f2bda8…fe251 (cross-tool == hashlib)
python3 fix7_canon_v1_ssot_extended.py --selftest	/tmp/fix7-canon	0	36/36 PASS
python3 fix7_canon_v1_ssot_extended.py --produce docs …	/tmp/fix7-canon	0	membership_frozen_ok: True; 6/8 digests
python3 kb_roundtrip.py --selftest (KB copy)	/tmp/fix7-canon	0	36/36 PASS (round-trip integrity)

• Determinism: selftest stable across 3 runs; --produce run1 == run2 byte-identical.
• Environment: offline, stdlib python3 3.11.6, macOS; no network/DB.

4. Selftest truthfulness proof

The recheck-8 "22/22" was unverifiable (file absent). Now: 22/22 reproduced with the materialized file AND extended to 36/36 whose new 14 checks execute the production extractor + 11 fail-closed statuses + dup-authority inventory — i.e. they cover the production seal path L2 said the 22 did not. Full pasted output: packet README §3–§4.

5. Honesty caveats

• canonicalizer_sha256_candidate (8f80f9…) is over the local SSOT .md copy; the authoritative value is over KB MCP bytes at the sealed revision (Codex computes).
• The 10 input docs are byte-exact MCP fetches (char counts verified == KB content_length); their per-doc N1 hashes are real candidates.

Verdict

EXECUTABLE_ARTIFACT_EVIDENCE_BOUND — the absent-.py root cause is fixed with a reproducible materialization + run; every command has cwd/exit/output/hash; selftest truthfulness demonstrated (36/36 over the production path); KB round-trip confirms the artifact runs from KB.