Publishing a TypeScript package correctly requires configuring a surprising number of things: dual ESM/CJS builds, .d.ts generation, getting the exports field right, type-level tests, changelogs, npm publish. I was managing separate configs for tsup, publint, attw, tsd, and changesets across multiple packages and it was getting unsustainable.

tspub combines all of this into one tool:

- `tspub build` esbuild-based ESM + CJS builds with automatic .d.ts generation. Handles __dirname/__filename shims for CJS, conditional .d.cts/.d.mts for dual packages.

- `tspub check` 70-rule linter for your package before you publish. Catches things like CJS/ESM format mismatches (file contents don't match what exports claims), wrong "types" condition ordering (TypeScript silently resolves `any`), leaked sensitive files, excessive `any` in declarations, and more. Also has `--fix` for safe auto-fixes.

- `tspub test-types` runs type level tests (.test-d.ts files) to verify your public API types are correct.

- `tspub publish` version bump, changelog generation, npm publish, and GitHub release creation in one command.

- `tspub init` scaffolds a correctly configured package from scratch.

The checker also works as a web playground you can check any published npm package without installing: tspub.dev/check/axios

Everything works standalone. You can use just `tspub check` without adopting the build or publish features.

It's still early. I'd appreciate honest feedback especially on the checker (false positives?) and the build output (edge cases I'm missing?).

GitHub: https://github.com/tspub/tspub