Task 4.2 (Req 5.3, 5.4, 5.5).
- propose_mechanism_edits: retract admitted records that leak on a
holdout fixed side; admit a candidate only when a trial store holding
it alone recovers a currently missed holdout pair without leaking.
- run_round(mechanism_candidates=, mechanism_store=): validates, applies
after the rule gate passed, re-scores the holdout pairs per profile with
variant search (evaluate_mechanism_profiles), and rejects with a
byte-for-byte revert on mechanism_leak, profile_regression or
mechanism_no_gain; the journal records each mechanism edit with its
pair provenance and the metrics before and after.
- The rule gate and its per-profile clause are unchanged.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01T7XD7x5KonMdmGRkp63EQG
