v0.25.0

Performance

• Pass 2 reference-location recording now uses per-worker staging buffers (PendingRefLocs) instead of writing directly to shared Arc<Mutex<...>> maps. Workers accumulate locations in an isolated parking_lot::Mutex<Vec<RefLoc>> and a single serial commit drains them with one lock acquisition per map. Pass 2 wall-clock variance reduced from 28–240 ms (8×) to 43–56 ms (±25%) on 12 threads.

Fixed

• analyze_dependents_of() now returns the correct dependent set after a symbol is deleted or renamed. Previously, files referencing a now-gone symbol were silently dropped because dependency_graph() routed edges through symbol_defining_file(), which returns None for deleted symbols. Three coordinated fixes: a file_to_defined_symbols forward index for O(1) definition lookup on removal; a symbol_referencers reverse index that survives symbol deletion; and a stale_defined_symbols accumulator in AnalysisSession that feeds deleted symbols' referencers back into the BFS.