David Snelling
65493ba2de
Some checks failed
Delta Gate / Delta gate — candidate vs control (push) Waiting to run
CI / Node 22 (push) Failing after 1m29s
CI / Bun (latest) (push) Has been cancelled
CI / Node 24 (push) Failing after 1m29s
CI / Integration + conformance (Node 22) (push) Failing after 1m30s
`vfs.search({ path })` built its scope as `path: { $startsWith: path }`.
`$startsWith` is not in the filter vocabulary at all, and the `$`-less spelling
is REFUSED by the metadata index's served-operator law — an equality/range
posting index cannot evaluate a substring without reading every row, so it
refuses rather than answering an empty page. Every path-scoped VFS search threw
on this engine line; the two pins in tests/vfs/vfs.unit.test.ts that exercise it
have been red since the operator law landed.
The scope is now a half-open range over `metadata.path`:
`[dir + '/', dir + '0')`. Every descendant path begins with `dir + '/'`, and '0'
is the code point directly after '/', so membership in the range is EXACTLY
"carries that prefix" — and because the bounds differ at one ASCII position the
answer is identical under code-unit and code-point collation. Siblings fall out
correctly for the same reason: `/scope-sibling/x` sorts below the lower bound
and `/scope0` sits at the open upper bound. `recursive: false` narrows to the
directory's own identity instead — `parent`, an indexed equality. The root
adds no clause, because every VFS entity is under it.
`path` is the VFS's truth (write and rename maintain it; the `Contains` edges
are a projection of it), it is already indexed on every VFS entity, and
`explain()` reports the range as `column-store` — "O(log n) binary search +
roaring bitmap". So the scope narrows the search before it runs: no tree walk,
no migration, no backfill, and nothing fetched that the scope then discards.
Two other shapes were considered and rejected. A graph-scoped walk over
`Contains` reads the projection rather than the truth and costs O(subtree)
adjacency lookups per search, with the subtree's height as an unknown `depth`.
An indexed `ancestors: string[]` field cannot be implemented honestly today:
the index extractor skips arrays longer than ten elements, so a path more than
ten levels deep would silently drop out of every scoped search — and it needs
a backfill besides.
Pinned in tests/vfs/vfs-search-path-scope.test.ts (all eight red before this
change): descendants at three depths and never a sibling, including the
`/scope-sibling` and `/scope0` prefix traps; a trailing or doubled slash names
the same scope; the root scope equals the unscoped search; `recursive: false`
is the immediate children and refuses a missing directory by name; every
operator the search emits is ANSWERED by the index's own door rather than
refused; the id universe the index resolves for the search is already the
scope; and the range agrees with walking the tree.
|
||
|---|---|---|
| .. | ||
| api | ||
| benchmarks | ||
| comprehensive | ||
| configs | ||
| conformance | ||
| fixtures | ||
| helpers | ||
| integration | ||
| integrations | ||
| lifecycle | ||
| performance | ||
| regression | ||
| scripts | ||
| transaction | ||
| unit | ||
| vfs | ||
| critical-neural-validation.test.ts | ||
| critical-performance-benchmark.test.ts | ||
| model-loading.test.ts | ||
| package-size-breakdown.test.ts | ||
| package-size-limit.test.ts | ||
| setup-integration.ts | ||
| setup-semantic.ts | ||
| setup-unit.ts | ||
| setup.ts | ||
| type-utils.unit.test.ts | ||