.cjs was half-registered: the language maps in build.py and
extract.py already routed it to the JS grammar, but it was missing
from CODE_EXTENSIONS, the extractor _DISPATCH, _LANG_FAMILY, and the
JS resolution/cache suffix sets — so .cjs sources (Electron
main/preload scripts, CommonJS escape hatches in "type": "module"
packages) were silently skipped during a build: classified as
non-code and never handed to the JS extractor.
Add .cjs alongside .mjs in the six lists that gate/route JS files
(detect.py, extract.py _DISPATCH, analyze.py _LANG_FAMILY,
extractors/models.py cache-bypass, extractors/resolution.py resolve
exts, cli.py _HOOK_SOURCE_EXTS), with regression locks mirroring the
.mts/.cts fix (#1607).
Real-world impact: an Electron app whose ~2000-line main.cjs backend
was invisible went from 201 to 294 nodes and 256 to 441 edges on
rebuild.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
