feat: auto-regenerate types when schema files change

[kenjonespizza]

Adds automatic type regeneration when schema files change during development.

Changes

• Add chokidar-cli dependency
• Add dev:typegen script that watches studio/src/schemaTypes/**/*.{ts,tsx} files
• Add generate-types script to run extract-types and typegen sequentially
• Watcher runs automatically with npm run dev (via dev:* glob pattern)

How it works

When you run npm run dev, the watcher starts alongside Next.js and Sanity Studio. Any changes to schema TypeScript files trigger the full type generation pipeline: schema extraction → typegen → prettier formatting.

Dependencies

⚠️ This PR depends on #177 being merged first.

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1 Skipped Deployment

Project	Deployment	Review	Updated (UTC)
template-nextjs-clean	Skipped		Jan 12, 2026 10:51pm

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	npm/​chokidar-cli@​3.0.0
	npm/​styled-components@​6.1.19 ⏵ 6.2.0
	npm/​sanity-plugin-asset-source-unsplash@​7.0.0 ⏵ 7.0.2	+1			+1
	npm/​@​sanity/​vision@​5.1.0 ⏵ 5.2.0
	npm/​sanity@​5.1.0 ⏵ 5.2.0	+1
	npm/​@​sanity/​client@​7.13.2 ⏵ 7.14.0	+1			+2
	npm/​next-sanity@​12.0.7 ⏵ 12.0.10				+2

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[codebravotech]

@kenjonespizza as mentioned in slack I think it would be nice if the dev:typegen script:

• also watches the queries file in the FE because when you use defineQuery or groq , typegen will respect that and generate the query response types, which is suuuper useful. I'd argue that having query result types is actually the most important positive impact of using our typegen tooling, because FE componentry is the place that having pre-defined types saves the most time
• copies the generated types to somewhere in the studio that they're easy to import/use in studio custom components if desired