Helix

Schemas

• Every CLI command that emits JSON stamps schema_kind and spec_version.
• helix schema manifest --out schemas.json exports the full registry.
• helix schema diff --base old.json --target new.json shows additions/removals.
• helix viz --schema prints contracts plus sample payloads.

Treat schemas like APIs: bump the version, document diffs, and add workflow validation (schema: {kind, output}) whenever a step produces JSON.