# Setup Dev Env

> Set up the development environment for the project. Use when starting work on the project, when dependencies are out of sync, or to fix environment setup failures. Use when this capability is needed.

- Skill: `tomevault-io/setup-dev-env` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add tomevault-io/setup-dev-env`
- Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/setup-dev-env/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: tomevault-io (https://skillmd.com/u/tomevault-io)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/tomevault-io/setup-dev-env

---


# Setup Development Environment

This skill automates the process of setting up the development environment to ensure all tools and dependencies are correctly installed and configured.

## Workflow Checklist

- [ ] **Step 1: Environment Validation**
  - [ ] Check Node.js version against `.node-version`
  - [ ] Check for `pnpm` installation
- [ ] **Step 2: Dependency Installation**
  - [ ] Run `pnpm install` (this also installs the `trunk` launcher)
- [ ] **Step 3: Tooling Setup**
  - [ ] Run `pnpm trunk install` to fetch managed linters and formatters

## Detailed Instructions

### 1. Environment Validation

#### Node.js Version

Read the `.node-version` file in the workspace root. Ensure the current Node.js environment matches this version. If there's a mismatch, inform the user to switch Node versions (e.g., using `nvm` or `fnm`).

#### Trunk CLI

Trunk is managed via `pnpm` in this project using `@trunkio/launcher`. This ensures it works in cloud environments like Claude Code Cloud without manual installation.

The `trunk` launcher is installed automatically during `pnpm install`. You can then run Trunk commands using `pnpm trunk`.

For local macOS users who prefer a global installation:

```bash
brew install trunk-io
```

For other platforms, refer to the [Trunk installation documentation](https://docs.trunk.io/references/cli/getting-started/install).

### 2. Dependency Installation

Run the following command at the workspace root to install all project dependencies, including the Trunk launcher. Refer to [../common-references/pnpm-commands.md](../common-references/pnpm-commands.md) for more pnpm commands.

```bash
pnpm install
```

### 3. Tooling Setup

Trunk manages linters and formatters hermetically. Run the following command to ensure all required tools are downloaded and ready.

```bash
pnpm trunk install
```

Refer to [../common-references/trunk-commands.md](../common-references/trunk-commands.md) for more Trunk commands.

## Success Criteria

- All `pnpm` dependencies are installed successfully.
- `trunk` is installed and all managed tools are initialized.
- The Node.js version matches the requirement in `.node-version`.

## Post-Setup Verification

To ensure the environment is fully operational:

1. **Invoke Verifier**: Run the `verifier` subagent ([../../agents/verifier.md](../../agents/verifier.md)). This confirms that the freshly installed dependencies allow for a successful build, pass lint checks, and satisfy all unit tests.
2. **Handle Failure**: If the `verifier` fails, follow its reporting to resolve environment-specific issues.

---
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<!-- tomevault:4.0:skill_md:2026-04-13 -->