missing-tools - SKILL.md Agent Skill

name: missing-tools description: Resolves missing CLI tools. Use when a command is unavailable, a shell reports command not found, or a tool must be run without installing it globally.

Use this workflow when a command is unavailable in the current shell.

Try the current project's direnv environment:
```
direnv exec . <command>
```
Use comma for tools from nixpkgs:
```
, <command>
```
Use nix run when a specific nixpkgs package is needed:
```
nix run nixpkgs#<package> -- <args>
```

Use nix shell as the last resort:

nix shell nixpkgs#<package> --command <command>

Never install missing tools globally. Do not use commands such as npm install -g, npm i -g, pnpm add -g, yarn global add, bun add -g, uv tool install, brew install, or language-specific global installers to resolve a missing command.
Prefer direnv exec . first because project-local dev shells often already provide the right tool version and environment variables.
Comma automatically finds and runs the nixpkgs package containing the requested command.
Use fish for shell wrapping in this dotfiles environment:
```
fish -c '<command>'
```