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glm-5.3-flash 856d436f81 feat(engines): the local large-tier engine — sharded files, stage-then-commit-rename, pread cursors

- LocalBackend: flat {hex-prefix}/{hex-prefix}/{hex} sharding over
  lowercase-hex-of-Key::as_bytes filenames (self-describing; the
  list-decode round-trip recorded for the review gate); virgin-store
  reads are no-ops
- staged put: unique stage files under {root}/staging/, commit-rename
  is the publish, CAS first-writer-wins, every failure path (discard,
  failed commit, Drop cancellation) converges on zero residue
- read cursor: pread loop over the immutable committed file, EOF
  clamping, provided read_range composing the slice-digest convention
- all file I/O in spawn_blocking; size is a stat, never a content load
- list walks the committed tree and is fatal (Error::Io, path named)
  on anything that does not decode — complete and well-formed
- 11 in-module unit tests incl. exact-count stage hygiene over all
  failure forms and the success form

Verification: cargo test (44 green), clippy --all-targets/--all-features
-D warnings, fmt --check — all clean

Task: tasks/engine-local.md

2026-10-11 22:05:59 +00:00

.opencode/agents

docs(architecture): fix YAML-invalid frontmatter; changelog text moves to notes

2026-10-11 17:20:50 +00:00

docs

docs(tasks): decompose wave 2 — mem + local engines, facade, in-process GC, first suite columns

2026-10-11 21:39:28 +00:00

src

feat(engines): the local large-tier engine — sharded files, stage-then-commit-rename, pread cursors

2026-10-11 22:05:59 +00:00

tasks

feat(engines): the local large-tier engine — sharded files, stage-then-commit-rename, pread cursors