Distillation

Date: Sep 9, 2026

• 🟡 (15:44) Raw ZIP probe output was exactly: 0 (788, 20, 0, 0) 0x0 0 and 8 (788, 20, 0, 8) 0x0 8.
• 🟡 (15:57) ZIP inspection reported artifact size 423046 bytes, central-directory start 421788, 19 members, zero-length archive comment, and prefix offset 420552.
• 🟡 (15:57) ZIP inspection listed the 19 members in exact order: 1. documents.json, 2. luna-a.json, 3. luna-b.json, 4. adjudication-package.json, 5. preliminary-package.json, 6. preliminary-summary.json, 7. preliminary-summary.md, 8. summary.json, 9. summary.md, 10. terra-route.json, 11. terra.json, 12. v1.2-adjudication-package.json, 13. v1.2-preliminary-package.json, 14. v1.2-preliminary-summary.json, 15. v1.2-preliminary-summary.md, 16. v1.2-summary.json, 17. v1.2-summary.md, 18. v1.2-terra-route.json, 19. v1.2-terra.json.
• 🟡 (15:57) Every inspected ZIP member had creator system 3 (Unix), mode 0o100644, compression method 8 (DEFLATE), and general-purpose flag 0x8 (data descriptor).
• 🟡 (15:57) ZIP member size metadata was: documents.json uncompressed 445940, compressed 120892; luna-a.json 56076/7161; luna-b.json 52967/6651; adjudication-package.json 149490/13779; preliminary-package.json 107543/10349; preliminary-summary.json 707/353; preliminary-summary.md 543/311; summary.json 703/351; summary.md 542/309; terra-route.json 391727/105388; terra.json 43744/6482; v1.2-adjudication-package.json 156038/14335; v1.2-preliminary-package.json 109772/10416; v1.2-preliminary-summary.json 788/375; v1.2-preliminary-summary.md 618/334; v1.2-summary.json 784/372; v1.2-summary.md 617/332; v1.2-terra-route.json 425012/115319; v1.2-terra.json 50036/7043.
• 🔴 [requested-review] (16:43) User stated the prior result was empty and allowed exactly one retry.
• 🔴 [enforced-scope] (16:43) User instructed the retry to read only src/institution_lab/governance_adjudication.py and tests/test_governance_adjudication.py and not edit any files.
• 🔴 [requested-security-review] (16:43) User limited the review to ZIP container structure and member-metadata validation: EOCD/ZIP64 policy; central-directory boundaries and full consumption; raw central filename identity; local-versus-central header agreement; NUL and Unicode path extra-field ambiguity; unsafe or colliding normalized paths; duplicate names; disk and encryption flags; unsupported flags and methods; and Unix non-regular or special-file modes.
• 🔴 [rejected-scope] (16:43) User explicitly excluded decompression, CRC validation, decoded-size accounting, and data-descriptor parsing, except for defining the boundary required by a separate decoder.
• 🔴 (16:43) User required the proposed validation to accept the current pinned archive: exactly 19 members, Unix mode 100644, DEFLATE compression, and data descriptors.
• 🔴 (16:43) User requested concrete minimal helper signatures, exact binary fields and offsets, validation order, normalized errors, and deterministic fail-first test mutations.
• 🔴 (16:43) User required the response to be either substantive evidence/guidance ending exactly SUBSTANTIVE, or an exact blocker with tool/error evidence ending exactly BLOCKED.
• 🔴 (16:43) User stated a persistent response preference: never return empty.
• 🟡 (17:05) A file-discovery tool attempt returned exactly No files found.
• 🟡 (17:09) A subsequent direct read successfully found /home/byk/Code/institutional-transition-lab/src/institution_lab/governance_adjudication.py and displayed lines 1–280 of 946.
• 🟡 (17:09) Current ZIP handling at src/institution_lab/governance_adjudication.py:179-208 delegates parsing to zipfile.ZipFile(io.BytesIO(artifact)); obtains decoded entries through archive.infolist(); checks member count, duplicate decoded info.filename values, total declared info.file_size, required-member presence and per-member size, then opens and decompresses the two required members for byte comparison; zipfile.BadZipFile is normalized to artifact is not a valid ZIP archive.
• 🟡 (17:09) The displayed implementation contains no explicit raw EOCD/ZIP64 parser, central-directory full-consumption check, raw filename identity check, local-versus-central header comparison, NUL/Unicode path-extra ambiguity handling, path normalization/collision check, disk/encryption or unsupported-flag policy, compression-method allowlist, or Unix special-file-mode rejection in the shown ZIP-validation block.