The Files search compiled the user's query into a backtracking RegExp:
'*a*a*a...' became '^.*a.*a.*a...$', the classic blowup, evaluated
synchronously against every walked path — a pathological query could
freeze the event loop for the whole server (and every user of it in
multi-user mode). /api/search stays regex-free for exactly this reason.
Globs now match through a two-pointer wildcard walk, O(text · pattern)
worst case, with a 256-char query cap bounding the pattern side; an
overlong query compiles to null, the same answer as an empty one.
Semantics are unchanged (anchored, case-insensitive, * spans slashes)
and the existing tests pass untouched; the pathological pattern gets a
test that fails by timeout with the RegExp version.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
GET /api/sessions/:id/files gains an optional `q`. With one, the endpoint
answers a FLAT match list instead of a nested tree; without one, the response is
exactly what it was, so every existing caller is untouched.
compileFileQuery() (src/utils/file-query.ts) turns the query string into a
reusable predicate, so the walk prunes as it goes rather than streaming the
whole tree to the client to be filtered there. An empty or whitespace-only
query compiles to null, which is what makes "no query" and "blank query" the
same thing.
The search walk deliberately recurses past directories that do not match — a
file whose ancestors don't match is exactly what people are searching for — so
it carries its own maxMatches cap on top of the existing maxFiles and maxDepth
ones, and reports `truncated` when it stops early. Hidden-file and
excluded-directory rules are the same ones tree mode already applies.
Tests: file-query.test.ts covers the matcher; routes/file-search-mode.test.ts
drives the endpoint against a real temp tree and pins the two properties worth
having — that the walk reaches a match under non-matching parents, and that an
absent or whitespace query leaves the tree response alone. Gating the recursion
on a match turns those red.
Codeman maintainer