Skill: extend-signal-schema (afi-core) Purpose Use this skill when you need to extend or refine signal schemas in afi-core, adding new fields or validation rules to the Raw, Enriched, Analyzed, or Scored signal schemas. This skill ensures changes are: - Safe : Backwards compatible where possible, with clear migration paths - Governed : Aligned with AFI Droid Charter, AFI Droid Playbook, and afi-core/AGENTS.md - Correct : PoI/PoInsight remain validator-level traits, NOT signal fields - Tested : Schema changes include minimal test coverage This skill is primarily used by and any future afi-core…