[Enhancement]: Create a typescript declaration file for the schema and publish the types as an npm package

[MattCantor]

Description of Enhancement :

I'd like to propose that we generate a TypeScript declaration file for the schema and publish the types as an npm package.

Why is this Needed?

Having type signatures for the various objects in the schema would improve the DX when building out modules on top of the schema.

An immediate use of this would be to refactor Arthur's validator tools into standalone modules.

Anything else we need to know?

Perhaps we could use a tool like json-schema-to-typescript to automate the process?

[osis]

This is a really cool idea.

[JSv4]

@MattCantor, love this. We have similar needs across a few different utilities now. The doc generators don't need typing perse, but they do need composed schemas, so I had opened PR #576. I would love to create a single utility for composition as the start of both the doc gen and type gen pipelines and then have move that to somewhere we can publish and consume from. What do you think about putting a schema composer utility in OCF-Tools first, then rebuilding #576 to use that and tweaking your OCF-Tools type generator to use the then-shared schema composer?

[MattCantor]

@JSv4 great idea, I'm on board

[sophymarine]

Generating types straight from the JSON Schema works. The catch is drift. If the schema changes and the generated declarations do not, TypeScript quietly lies to you.

Most teams wire the generation step into CI so the .d.ts files always track the canonical schemas in the repo. json-schema-to-typescript is the usual tool. It behaves well with simple schemas. Heavy $ref graphs can trip it up, though. In those cases we had to pre-bundle the schema first so the generator reads one resolved document.

A setup that’s held up for us: treat the schema as the source of truth, generate during release, then publish a tiny @open-cap-table/ocf-types package. Only .d.ts. Include the schema version in package.json.

Downstream tools like Arthur’s validators can then pin a specific schema revision instead of following main and hoping nothing changed.