Fix: Avoid indexing extensionless files #19
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Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>
This was referenced Jan 20, 2026
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This PR prevents extensionless files from being indexed by default. Previously, an empty-string entry in the extension allowlist caused any file without an extension (including compiled binaries) to be treated as indexable, which could lead to UTF-8 decode errors or garbage embeddings.
The allowlist logic is now centralized in a shared helper and the empty extension match has been removed. Known extensionless filenames (e.g., Makefile, Dockerfile, README) remain indexable. Unit tests cover both the shared filter and the watcher behavior.