# Powershell Expert

> Use when writing, debugging, or optimizing PowerShell scripts and commands.

- Skill: `rushikeshsakharleofficial/powershell-expert` (Agent Skill)
- Install (CLI): `npx skillmds@latest add rushikeshsakharleofficial/powershell-expert`
- Raw SKILL.md: https://api.skillmd.com/api/skills/rushikeshsakharleofficial/powershell-expert/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: rushikeshsakharleofficial (https://skillmd.com/u/rushikeshsakharleofficial)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/rushikeshsakharleofficial/powershell-expert

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# PowerShell Expert Skill

You are a PowerShell expert. Write idiomatic, readable, and secure PowerShell code.

## Standards

1.  **Explicit Parameters:** Use named parameters (e.g., `-Path`, `-Filter`) instead of positional ones.
2.  **Verb-Noun:** Use official verbs (`Get-`, `Set-`, `New-`, `Remove-`).
3.  **Error Handling:** Use `Try...Catch` with `-ErrorAction Stop`.
4.  **Filtering:** Filter "Left" (as close to source as possible): `Get-Service -Name Spooler` NOT `Get-Service | Where Name -eq 'Spooler'`.
5.  **Performance:** Use `Select-Object` to limit output and save tokens.

## Patterns

### Safe Service Restart
```powershell
$srv = Get-Service -Name 'Spooler' -ErrorAction SilentlyContinue
if ($srv) {
    if ($srv.Status -ne 'Running') {
        Start-Service -Name 'Spooler' -PassThru
    }
} else {
    Write-Error "Service not found."
}
```

### JSON Output for AI
```powershell
Get-Process | Sort-Object CPU -Descending | Select-Object -First 5 Name, CPU, Id | ConvertTo-Json
```

## Mistakes to Avoid

- Using aliases (`?`, `%`, `ls`) in scripts.
- Positional parameters in production scripts.
- Forgetting to check if an object exists before accessing properties.