Pulls the duplicate-detection and keep-ranking surface out of
rc-jav.py:
DEFAULT_KEEP_RANKING
_KEEP_RANKING (module global)
decide_keep_with_reason
decide_keep
find_dupes
_SUSPICIOUS_MULTIPART_TAIL_RE
describe_dupe_risks
find_variant_alerts
Same mutable-rebound pattern as PART_RES: `_KEEP_RANKING` is now
configured via `set_keep_ranking(dict)` rather than a `global` write
in rc-jav.py's main(). Reads happen only inside the module that owns
the binding, so callers never see a stale snapshot.
rc-jav.py: 1972 → 1763 lines (209 extracted).
rcjav/dupes.py: 244 lines.
Verified:
- python rc-jav.py --help → ok
- python fixtures/run.py → 17/17 cases pass
- python -m unittest tests.test_rules → 5/5 OK
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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