Tighten evidence schema in meta_engine genesis system prompt

Edit META_PROPOSER_SYSTEM (around line 44 evidence clause). Replace '1-3 corpus item references (source_corpus + source)' with strict schema: each evidence entry MUST be {source_corpus: 'E'|'D'|'T', source: <string identifier from the prompt's actual corpus items>, excerpt: <1-line verbatim quote from that corpus item, <=160 chars>}. Add a CALIBRATION example showing a complying entry. Add REJECT clause: 'evidence entries lacking a corpus_id that appears in the supplied corpora, or lacking a verbatim excerpt, are auto-killed by self-review.' Add post-genesis validator in cycle.js (or genesis.js parser): drop proposals whose evidence entries fail schema before any DB write, log to logs/ as 'genesis_evidence_reject'.

Among the next 60 meta_filter_score DROP reasons, mentions of 'invented evidence' / 'evidence not citable' / 'cargo-cult citation' decrease by >=50%. Proposer self-kills (rejected[] array length) increase modestly. Net KEEP rate may not move, but downstream judge confidence improves.

Sample 30 meta_filter_score outputs after deployment. If 'evidence' is still cited as a DROP reason at the same or higher rate as the pre-deployment baseline, the prompt edit failed to constrain proposer behavior and should be reverted or escalated to a hard validator.

Rejected at the council verdict. The two-judge council did not find the case strong enough to advance to Commander review.