75c6ad251d50b46320c3939b6b8247151f61b2ab
Seed + 21/47 legacy fields -> 30 compound rooms (72 primitives), 3 branches, destination chamber; mouths fixed; 8.67 deg max grade. Passage composer no longer skips native cave layers (incoming passage 21,425/21,425 open). Open: route-support audit has 380 unsupported samples near the arrival mouth. Not for merge. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016dhxM43dnWvUu2B5Ph1iG1
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