Agents asking "is this function used?" get resolved, unknown, or
unreferenced per function instead of a bare zero in-degree. Unknown lists
why callers may exist: same-name unresolved call sites (excluding foreign
receivers and macros), name references (callbacks, address-taken, macro
bodies), virtual/trait-impl/external-base/outside-class members, framework
attributes, implicit protocol invocations, entry points, test code,
incomplete parses, and, unless assume_closed_world is set, exported or
external-linkage functions. Unreferenced is a review candidate with an
explicit heuristic/compiler evidence basis, never a dead-code proof.
The queries are read-only over validated schema-4 models and return
complete canonical nodes and edges plus metrics.resolution coverage.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Use pinned grammar frontends and scoped heuristic resolution to recover declarations and prevent false dependencies. Constrain filesystem traversal and normalize Fold root aliases.
Add exact multilingual fixtures, seventeen regression tests, and a three-repeat benchmark to the quality gate.
