POC code: /workspace/alkblobs-trait-poc (17 tests passing, clippy -D
warnings + fmt clean; digests validated byte-exact against the real
git hash-object CLI, both object formats)
Findings (poc-trait-dispatch-findings.md, 8):
- lean Backend trait (opaque byte keys, complete list(), put-path
pinning) is sufficient; Key typed wrapper lives at the boundary
- redb traps: list() key-vs-value destructure (silent until GC
catches it — malformed list is as deadly as incomplete), virgin-db
TableDoesNotExist on first read, no in-memory db (temp file used)
- pinning: Pinned RAII guard + refcount map works; batch-scope pins
and the sweep-vs-put race are named Phase 1 requirements (iroh
DeleteSet = prior art)
- git-blob preamble abstraction validated; external-git oids address
pool entries with zero indirection (the OQ-BL-03 resolution,
implementation-confirmed)
- tagged key format ([algo byte][digest]) makes git-sha256 + git-sha1
coexist; sort-stable for sweep diffs
- dual dispatch works as simply as hoped; routing deterministic
- namespace tables: protect callback MUST share live state (the
snapshot-install bug proves the API lesson: register_liveness_source
shape, not install_into)
- GC semantics verified: exact deletion counts, abort-callback,
delete-then-recover byte-identical re-put
phase-0.md: POC #1 marked passed, #2 absorbed (validated), #4 covered
in miniature (concurrency half deferred to Phase 1 impl work);
OQ-BL-02 base settled; OQ-BL-03 implementation-validated; OQ-BL-05
mechanism settled with findings folded in; plan updated (POC #3 is
the last open POC)
glm-5.3-flash
493516424a