Agent Skills: ring:reconciling-predev-docs

Reconciling pre-dev artifacts (research.md, prd.md, feature-map.md, trd.md, openapi.yaml, schema file, dependencies.md, plan.md) against each other to surface contradictions and gaps that break implementation, then applying approved corrections before ring:running-dev-cycle. Use after ring:planning-small-features or ring:planning-large-features. Skip for end-user docs (use ring:reviewing-docs), code review (use ring:reviewing-code), or before the docs exist.