* test(#3514): add failing-first denylist and integrity suites * fix(#3514): deny internal fetch hosts; disclose unverified integrity * docs(#3514): trust-model, glossary, and changeset entries * fix(#3514): scope v6 checks to literals; exact pin kinds in prompt * chore(#3514): backfill changeset pr number --------- Co-authored-by: sim <sim@local>