Artifact Description [e7ef6c8ba3]

Artifact e7ef6c8ba396da771a145224e22dfc749250cee73ded1188bfe00eb3c27eca92:

• File src/dst.zig
  • 2026-07-30 17:20:03 — part of check-in [cb22503707] on branch shun-implementation — shun S7: the shun+reclaim crash sweep

    A DST sweep that shuns artifacts (forcing a delta base, a manifest and a mid-chain artifact across seeds), reclaims through rewriteAndSwap, and cuts the run at sampled write/sync/rename boundaries. The oracle classifies the recovered store as the PRE image or the POST image and fails on anything else.

    It earns its place: deleting packLog's pre-rename fsync is caught by this sweep and by nothing else in the suite. The concurrency-guard boundary is a second, DST-shaped pin on S3's fresh-stat fix rather than first coverage, and the module header says so.

    Two oracle clauses are graded honestly as tripwires, not coverage. Surviving content is re-hashed by packLog before its own commit, so a defect that would corrupt it aborts the rewrite instead and the sweep just sees the PRE image; no mutant can make that clause fire. The PRE half of the third clause is subsumed by the byte-equality check. Both are kept cheap and labelled.

    rewriteAndSwap and RewriteError are now pub: the property under test is a property of that sequence and reaching it needs the seam.

    faulty_dir gains fileSetLength and fileClose wrappers, deliberately ungated so no sibling sweep's cut numbering shifts.

    The default dst gate grows about 11s (~9%) for 12 sampled cuts per seed. (user: dmestas, size: 36693) [annotate] [blame] [check-ins using]

  • 2026-07-30 18:47:05 — part of check-in [e57bcceadf] on branch trunk — merge shun-implementation: shunning and space reclamation

    A repository-local shun table (sync SS3.3), the zit shun verb over it, and the four suppression directions the drafts require: never requested, never announced or served, an arriving copy discarded, and the bytes reclaimed on demand through the existing atomic rewrite.

    Built as eight slices, each through design review, TDD, spec audit, three review lenses, mutation proof and a full gate. Reading the eight as one change afterwards found what none of them could alone: a peer-reachable assert that crashed the client on a malformed DELTASRC, and a pre-rename guard that re-stat'ed a stale handle so two concurrent rewrites could un-shun each other.

    Two defects predating the feature are fixed on the way. FileStorage.sizeImpl answers from a cached watermark, so pack's tail-revalidate compared a key against the number it was derived from and could never abort -- the guard had never worked. And a malformed file card could trap the client through PendingDeltaQueue.

    Format version stays 1: an older binary meets an unknown frame kind and rejects cleanly, which is what it should do with a tombstone it cannot read. No interchange surface changed -- smoke covers ten fossil 2.28 scenarios including a fossil clone of a defer-shunned store and a real fossil push of a shunned artifact.

    Known and recorded, not blocking: a running zit serve keeps serving the old inode until restarted after a --force reclaim swaps generations. (user: dmestas, size: 36693) [annotate] [blame] [check-ins using]