Distillation

Date: Sep 9, 2026

• 🟡 (16:11) Test execution was blocked because pytest was unavailable: /usr/bin/bash: line 1: pytest: command not found.
• 🟡 (16:17) /home/byk/Code/institutional-transition-lab/src/institution_lab/governance_adjudication.py defines archive limits: MAX_INPUT_BYTES = 16 * 1024 * 1024, MAX_ARTIFACT_BYTES = 32 * 1024 * 1024, MAX_ARCHIVE_MEMBERS = 128, MAX_ARCHIVE_MEMBER_BYTES = 16 * 1024 * 1024, and MAX_ARCHIVE_EXPANDED_BYTES = 64 * 1024 * 1024.
• 🟡 (16:17) Current ZIP-member verification in _verify_input_payloads() uses zipfile.ZipFile(io.BytesIO(artifact)), rejects more than MAX_ARCHIVE_MEMBERS, duplicate info.filename entries, and total declared info.file_size above MAX_ARCHIVE_EXPANDED_BYTES; for documents.json and v1.2-adjudication-package.json, it checks declared info.file_size, reads through archive.open(info).read(MAX_ARCHIVE_MEMBER_BYTES + 1), checks actual decoded length, and requires exact equality with durable input bytes. It normalizes only zipfile.BadZipFile to ValueError("artifact is not a valid ZIP archive").
• 🟡 (16:17) _read_regular_file() opens with os.O_RDONLY | os.O_NONBLOCK | getattr(os, "O_NOFOLLOW", 0), requires a regular file via stat.S_ISREG, and enforces limits using both metadata.st_size and a read(max_bytes + 1).
• 🟡 (16:17) _parse_json_object() rejects duplicate JSON keys through _reject_duplicate_keys, rejects non-finite constants through _reject_non_finite_number, and requires the parsed top-level value to be a dict.
• 🟡 (16:29) A malformed/truncated compressed stream was accepted by zipfile despite the underlying decoder not reaching EOF: zipfile_accepted=True decoded=1920 codec_eof=False crc_matches=True compressed=32/33.
• 🟡 (16:30) /home/byk/Code/institutional-transition-lab/tests/test_governance_adjudication.py defines MAX_TEST_ARCHIVE_MEMBERS = 256; _write_pinned_cli_inputs() creates artifact.zip containing documents.json and v1.2-adjudication-package.json, builds all frozen hashes with file_sha256()/canonical_sha256(), and monkeypatches governance_adjudication.FROZEN_INPUT_PINS.
• 🔴 [requested-review] (18:09) User requested a read-only review of exactly src/institution_lab/governance_adjudication.py and tests/test_governance_adjudication.py; user explicitly prohibited editing files.
• 🔴 [enforced-scope] (18:09) User limited the review to bounded ZIP-member decoding and integrity after a separate parser supplies trusted compressed-data slices and central metadata: safe handling of STORED, DEFLATE, BZIP2, and LZMA or a justified narrower allowlist; hard decoded-byte limits independent of declared sizes and ZipExtFile.read(n); compressed-stream EOF and trailing-byte validation; decoded-size and CRC verification; data-descriptor handling and boundaries for the current pinned archive; malformed/truncated streams whose decoded payload or CRC could otherwise match; and normalized codec exceptions.
• 🔴 [rejected-approach] (18:09) User explicitly excluded design work for EOCD, central-directory path/name, local-header, collision, and file-mode validation.
• 🟡 (18:09) User asked for concrete minimal helper signatures, exact codec APIs/state checks, validation order, limits, normalized errors, and deterministic fail-first test mutations.
• 🔴 (18:09) User stated the first result was empty and this was the one permitted retry.
• 🔴 (18:09) User requires responses never to be empty.
• 🔴 (18:09) User required the retry to return either substantive evidence/guidance ending exactly SUBSTANTIVE, or an exact blocker with tool/error evidence ending exactly BLOCKED.
• 🟡 (18:31) Deterministic compressed-stream mutation experiment produced exact rows: 0 16 18 1 ab564ac94f2ecd4dcd2b2956b28a8ead0500; 1 17 19 1 ab564ac94f2ecd4dcd2b2956b28a8ead550000; 8 24 20 1 ab564ac94f2ecd4dcd2b2956b28a8ead55800200; 64 80 21 1 ab564ac94f2ecd4dcd2b2956b28a8ead55a0100000; 128 144 21 1 ab564ac94f2ecd4dcd2b2956b28a8ead5518600000; 256 272 21 1 ab564ac94f2ecd4dcd2b2956b28a8ead5518e10000; 1024 1040 26 1 ab564ac94f2ecd4dcd2b2956b28a8ead551805a360148c580000.