brain_write with a custom filename omitted the .md extension, causing
search to skip the file (search.go filters on HasSuffix .md).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Empty or whitespace-only queries would silently pass through to search,
returning meaningless results. Also removed the Domain field from
queryRequest — it was accepted but silently ignored since search.Query
has no domain parameter, which would confuse callers.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Implements POST /query (BM25 search via internal/search) and POST /write
(raw file persistence to brain/raw/) as an api.Handler struct. Filename
is auto-generated when absent.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Both walk-level errors and ReadFile failures now use best-effort
semantics (warn via slog, continue) instead of mixed abort/silent-skip.
filepath.Rel error is now propagated from the callback instead of
discarded.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Implements search.Query which walks brainDir/wiki/**/*.md, scores files
by term-frequency across query tokens, and returns results sorted by
score descending. Uses only stdlib — no external search deps.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
