Added
- Mutation-aware test suites — kill-the-survivor passes for
doctrine.resolver,doctrine.agent_profiles,doctrine.missions,doctrine.shared, andspecify_cli.compat.registry. Achieves 75–85 % kill rates per module; residuals documented as trampoline-equivalent, unloadable, or functionally equivalent indocs/development/mutation-testing-findings.md. _OPTIONAL_KEYS/_ALL_KNOWN_KEYSconstants inspecify_cli.compat.registry._validate_entry— unknown YAML keys now raiseRegistrySchemaErrorbeforeShimEntry(**entry)can raiseTypeError.model_dump(mode="json")on WP frontmatter serialization infinalize_tasks— preventsPathobjects from reaching YAML serialization.