Migrating from tsup

tspub uses esbuild under the hood — switching from tsup is straightforward.

Step 1: Remove tsup

npm uninstall tsup
npm install -D @tspub-dev/tspub

Step 2: Replace Config

tsup.config.ts (before)

import { defineConfig } from "tsup";

export default defineConfig({
  entry: ["src/index.ts"],
  format: ["esm", "cjs"],
  dts: true,
  clean: true,
  sourcemap: true,
});

tspub.config.ts (after)

import type { TspubConfig } from "tspub";

export default {
  build: {
    entry: "src/index.ts",
    formats: ["esm", "cjs"],
    dts: true,
    clean: true,
    sourcemap: true,
  },
} satisfies TspubConfig;

Step 3: Update Scripts

{
  "scripts": {
    "build": "tspub build",
    "check": "tspub check",
    "prepublishOnly": "tspub build && tspub check"
  }
}

Step 4: Remove tsup Config

rm tsup.config.ts

What You Gain

• 70 lint rules validating your package.json automatically
• Auto-fix for common issues (tspub check --fix)
• Type testing with .test-d.ts files
• Changeset versioning built-in
• Publish workflow with branch protection and provenance