Bite-sized TDD plan for iteration 1 of the packed-versioned-bundle cycle:
the on-disk packed format (src/packed.rs), the IndexStatus enum + packed-first
Pipeline::load path with per-file-store fallback, and the `index --pack`
subcommand. Structural validation only (magic/version/n_rows/payload length);
the semantic corpus+model mismatch enforcement, load warning, and index=
diagnostics token are deferred to iteration 2 (#4), as documented in the
plan's iteration-boundary note.
refs #3
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Brummel
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