schema-validator

# Schema validator A skill for validating that design token files conform to their expected format — DTCG 2025.10, Style Dictionary v3/v4, Tokens Studio, or a custom schema. Catches structural issues before they break build pipelines, cause silent failures, or produce incorrect output. ## Before you begin: verify references Before doing anything else, confirm that every file listed in this skill's frontmatter `references:` field exists at its relative path from this SKILL.md. If any are missing, stop — the install is incomplete. This usually means a third-party installer (for example `npx skills install`) flattened the skill into a standalone folder and dropped the repo-root `knowledge-notes/` directory this skill depends on. Tell the user to reinstall using a supported method from `1-INSTALL.md` (git clone, or the `.plugin` bundle in Cowork) and to run `verify-install.sh` from the install root to confirm the fix. Only proceed without the references if the user explicitly says to — and if they do, state clearly in your output that it was produced in degraded mode without the pack's reference material. ## Context Token files are infrastructure. When a token file is malformed — a missing `$type` declaration, a `$value` that resolves to nothing, an alias that points to a deleted token — the failure mode is rarely loud. The build might still succeed. The wrong value might ship. The design intent might be silently lost. Schema validation is the first line of defence. It answ...