kosh

Changelog

1.1.0 — 11 November 2026

First release as part of the CHCE family.

Added

• kosh verify — integrity check for containers, split sets, ZIP and tar, without extracting. --quick checks structure only.
• kosh info — container header, manifest digest and the physical block table.
• kosh doctor — installation self-check with a live pack/unpack round-trip and a Zopfli probe; exits non-zero on a fatal problem.
• kosh bench — reproducible codec comparison against gzip -9, xz -9 and zip -9, with --markdown for pasting into docs/FINDINGS.md.
• kosh pack --engine ziptastic|heavenzip — drive a CHCE engine across a process boundary; nothing is linked.
• CHCE stream detection in kosh scan (header only; decoding is the engine’s job).
• Container format v2: manifest_sha256 over the table of contents.
• Web UI: a Verify operation.

Changed

• README rewritten around the CHCE family, with measured tables and an explicit “what it is not”.
• docs/FINDINGS.md added: every number, the Zopfli budget, the rejected ideas.
• docs/FORMAT.md added: the container, byte by byte.

Fixed

• PNG adaptive filtering used a zero “up” row when encoding each row, which corrupted images whose chosen filter was Average or Paeth. Caught by the filter round-trip test, not by the screenshot.

1.0.0 — 11 November 2026

First working release, built as a replacement for five Windows utilities (DeflOpt, ECT, WABBIE, SplitSat, WinRK).

• split / join / parts — parts with a manifest and SHA-256 per part.
• pack / unpack — .kosh container, four codecs, per-entry hashes.
• archive create|list|extract — zip, tar, tar.gz, tar.zst, tar.xz.
• optimize — PNG, GZIP, ZIP, JPEG lossless re-compression.
• scan, ui, version.
• 31 tests.

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