The extraction spec forbids cross-language `calls` edges, and build already
dropped cross-language INFERRED `calls`. But `imports`/`references` had no such
guard: an unresolved Python `import time` resolved by bare stem (the #1504
old-stem alias) onto a `src/time.ts` file node, welding a polyglot repo's two
language halves together. In the reporter's repo three such edges were the only
bridge between 2409 Python and 1403 TS nodes, so every backend<->frontend
shortest path routed through time.ts, inflating its betweenness ~90x and making
it the #1 reported god node.
Hoist the interop-family map to a module constant and extend the edge-loop
guard to `imports`/`imports_from`/`references`. For these relations the edge is
dropped only when BOTH endpoints are known code languages of different families,
so a config/manifest -> code reference (unknown ext) is never mistaken for a
phantom. `calls` behavior is unchanged (still INFERRED-only, still drops when
either family differs). Regression tests: py->ts import dropped, ts->ts import
kept, config->code reference kept.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
