# Schema Evolve

> Change a governed schema with conservative compatibility analysis, consumer impact review, migration, and deprecation planning.

- Skill: `jmagly/schema-evolve` (Agent Skill)
- Install (CLI): `npx skillmds@latest add jmagly/schema-evolve`
- Raw SKILL.md: https://api.skillmd.com/api/skills/jmagly/schema-evolve/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: jmagly (https://skillmd.com/u/jmagly)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/jmagly/schema-evolve

---


# Schema Evolve

Resolve the catalog entry and baseline; inventory consumers; run compatibility
analysis before editing. Compatible changes retain the version policy. Breaking
changes require a new version, migration/rollback guidance, a support window,
updated fixtures/projections, and consumer signoff. Treat `unknown` as review
required, never as compatible. Finish with `schema-review`.