@nx-devkit/tsdown

Standalone Nx plugin: any tsdown.config.ts becomes a project with a cached build target. No project.json needed.

Part of nx-devkit. If you want the full TypeScript toolchain (typecheck, test, lint, format, build), use the @nx-devkit/typescript preset instead — it includes everything this plugin does.

Install

bun add -D @nx-devkit/tsdown tsdown

Requires @nx/devkit ^22 || ^23 (peer) and the tsdown binary installed — the target shells out to it via nx:run-commands.

Register

// nx.json
{ "plugins": ["@nx-devkit/tsdown"] }

What it infers

| Trigger | Target | Command | Cacheable | Outputs | |---|---|---|---|---| | tsdown.config.ts | build | tsdown (via nx:run-commands, cwd = project root) | yes | {projectRoot}/dist |

build declares dependsOn: ["^build"], so upstream dependencies build first.

Inspect

npx nx show projects
npx nx show project <name>
npx nx run <name>:build

Skip rules

• Only tsdown.config.ts matches (not .mts, .js, or other extensions).
• Configs inside node_modules are skipped.
• Configs that escape the workspace root are skipped.
• The workspace-root tsdown.config.ts is skipped — the plugin is for nested project roots.

Options

None. Behavior is entirely file-driven.

License

MIT