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vault_clearance: EUCLID
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# Session Breakthroughs — Project Constitution (Active)

> Living session log. Archive when the session ends. Same rules as vault README §6: claim, derivation/method, script path, test count, tier (IMPLEMENTED, DEMONSTRATED, OBSERVATION).

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*(Add numbered breakthroughs below. When the session ends, move this file to `_archive/` and start a fresh WORLDLINE.md.)*