onmax / tsdown
Install for your project team
Run this command in your project directory to install the skill for your entire team:
mkdir -p .claude/skills/tsdown && curl -L -o skill.zip "https://fastmcp.me/Skills/Download/1310" && unzip -o skill.zip -d .claude/skills/tsdown && rm skill.zipProject Skills
This skill will be saved in .claude/skills/tsdown/ and checked into git. All team members will have access to it automatically.
Important: Please verify the skill by reviewing its instructions before using it.
Use when bundling TypeScript libraries - provides tsdown configuration, dual ESM/CJS output, .d.ts generation, package validation, and plugin authoring
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Skill Content
---
name: tsdown
description: Use when bundling TypeScript libraries - provides tsdown configuration, dual ESM/CJS output, .d.ts generation, package validation, and plugin authoring
license: MIT
---
# tsdown
Rolldown + Oxc powered TypeScript bundler. Drop-in tsup replacement.
## When to Use
- Building TypeScript libraries
- Generating .d.ts declarations
- Publishing npm packages
- Dual ESM/CJS output
- Vue/React component libraries
## Quick Start
```bash
npm i -D tsdown typescript
```
```ts
// tsdown.config.ts
import { defineConfig } from 'tsdown'
export default defineConfig({
entry: 'src/index.ts',
format: 'esm',
dts: true,
exports: true,
})
```
```bash
tsdown # Build
tsdown --watch # Watch mode
```
## Reference Files
| Task | File |
| --------------------------------------------- | ------------------------------------- |
| Config file, CLI, entry points | [config.md](references/config.md) |
| Format, target, dts, exports, validation | [output.md](references/output.md) |
| Shims, unbundle, watch, frameworks, WASM | [features.md](references/features.md) |
| Plugins, hooks, lint, programmatic, migration | [advanced.md](references/advanced.md) |
## Loading Files
**Consider loading these reference files based on your task:**
- [ ] [references/config.md](references/config.md) - if setting up tsdown.config.ts, CLI, or entry points
- [ ] [references/output.md](references/output.md) - if configuring output format, target, .d.ts, exports, or validation
- [ ] [references/features.md](references/features.md) - if using shims, unbundle, watch mode, framework integrations, or WebAssembly
- [ ] [references/advanced.md](references/advanced.md) - if writing plugins, using linting/validation, programmatic API, or migrating from tsup
**DO NOT load all files at once.** Load only what's relevant to your current task.
## Cross-Skill References
- **Library patterns** → Use `ts-library` skill
- **Vue component libs** → Use `vue` skill
- **Package management** → Use `pnpm` skill