Mole Bug Patterns
tw93/Mole
A catalog of recurring bug shapes in the Mole Mac cleaner, used to review safety-sensitive diffs for deletion safety, unbounded commands, shell traps and weak tests.
PowerShell Windows patterns. An agent skill from xenitV1/Antigravity-Workflows.
Install Powershell Windows
$ npx skills add xenitV1/Antigravity-Workflows --skill powershell-windows -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install xenitV1/Antigravity-Workflows powershell-windows --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/xenitV1/Antigravity-Workflows.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/powershell-windows .claude/skills/powershell-windows && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "powershell-windows" agent skill from https://github.com/xenitV1/Antigravity-Workflows/tree/main/skills/powershell-windows into .claude/skills/powershell-windows/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "powershell-windows", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/xenitV1/Antigravity-Workflows/tree/main/skills/powershell-windowsType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add xenitV1/Antigravity-Workflows --skill powershell-windows -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install xenitV1/Antigravity-Workflows powershell-windows --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/xenitV1/Antigravity-Workflows.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/powershell-windows .agents/skills/powershell-windows && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "powershell-windows" agent skill from https://github.com/xenitV1/Antigravity-Workflows/tree/main/skills/powershell-windows into .agents/skills/powershell-windows/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "powershell-windows", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add xenitV1/Antigravity-Workflows --skill powershell-windows -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install xenitV1/Antigravity-Workflows powershell-windows --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/xenitV1/Antigravity-Workflows.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/powershell-windows .cursor/skills/powershell-windows && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "powershell-windows" agent skill from https://github.com/xenitV1/Antigravity-Workflows/tree/main/skills/powershell-windows into .cursor/skills/powershell-windows/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "powershell-windows", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/xenitV1/Antigravity-Workflows.git --path skills/powershell-windows--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add xenitV1/Antigravity-Workflows --skill powershell-windows -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install xenitV1/Antigravity-Workflows powershell-windows --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/xenitV1/Antigravity-Workflows.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/powershell-windows .gemini/skills/powershell-windows && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "powershell-windows" agent skill from https://github.com/xenitV1/Antigravity-Workflows/tree/main/skills/powershell-windows into .gemini/skills/powershell-windows/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "powershell-windows", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install xenitV1/Antigravity-Workflows powershell-windowsInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add xenitV1/Antigravity-Workflows --skill powershell-windows -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/xenitV1/Antigravity-Workflows.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/powershell-windows .github/skills/powershell-windows && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "powershell-windows" agent skill from https://github.com/xenitV1/Antigravity-Workflows/tree/main/skills/powershell-windows into .github/skills/powershell-windows/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "powershell-windows", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add xenitV1/Antigravity-Workflows --skill powershell-windows -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install xenitV1/Antigravity-Workflows powershell-windows --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/xenitV1/Antigravity-Workflows.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/powershell-windows .opencode/skills/powershell-windows && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "powershell-windows" agent skill from https://github.com/xenitV1/Antigravity-Workflows/tree/main/skills/powershell-windows into .opencode/skills/powershell-windows/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "powershell-windows", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
powershell-windows- GitHub stars
- 130
- Used in
- 8 other repos
- Token cost
- ~864 tokens
- SKILL.md length
- 287 words
- Files
- 1
- Skills in repo
- 42
- Repo updated
- First seen
- Licence
- MIT
At a glance
PowerShell Windows patterns. An agent skill from xenitV1/Antigravity-Workflows.
- Works in 10 steps: Operator Syntax Rules → Unicode/Emoji Restriction → Null Check Patterns → …
- Tasks that involve Error handling
- SKILL.md covers 1. Operator Syntax Rules, 2. Unicode/Emoji Restriction, 3. Null Check Patterns and 4. String Interpolation, plus 6 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Powershell Windows is an agent skill from xenitV1/Antigravity-Workflows. PowerShell Windows patterns. Critical pitfalls, operator syntax, error handling.
Its SKILL.md is about 860 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Development, covering Error handling. It works with PowerShell. The licence is MIT.
When your agent uses it
- Tasks that involve Error handling
Example prompts
- “/powershell-windows”
Requirements
- Pre-approved tools (allowed-tools): Read, Write, Edit, Glob, Grep, Bash
Workflow steps
10 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit f0a1fa7. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
ReadWriteEditGlobGrepBash
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are powershell).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Powershell Windows loads about 864 tokens when it runs. Until then it costs about 25 tokens; SKILL.md has 287 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
allowed-tools: Read, Write, Edit, Glob, Grep, Bash
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from xenitV1/Antigravity-Workflows at commit f0a1fa7, republished under its MIT licence (© xenitV1). 287 words, ~864 tokens.
Download SKILL.mdSave it as
.claude/skills/powershell-windows/SKILL.md (or your agent's skills folder).- name
- powershell-windows
- description
- PowerShell Windows patterns. Critical pitfalls, operator syntax, error handling.
- allowed-tools
- Read, Write, Edit, Glob, Grep, Bash
PowerShell Windows Patterns
Critical patterns and pitfalls for Windows PowerShell.
1. Operator Syntax Rules
CRITICAL: Parentheses Required
| ❌ Wrong | ✅ Correct |
|---|---|
if (Test-Path "a" -or Test-Path "b") | if ((Test-Path "a") -or (Test-Path "b")) |
if (Get-Item $x -and $y -eq 5) | if ((Get-Item $x) -and ($y -eq 5)) |
Rule: Each cmdlet call MUST be in parentheses when using logical operators.
2. Unicode/Emoji Restriction
CRITICAL: No Unicode in Scripts
| Purpose | ❌ Don't Use | ✅ Use |
|---|---|---|
| Success | ✅ ✓ | [OK] [+] |
| Error | ❌ ✗ 🔴 | [!] [X] |
| Warning | ⚠️ 🟡 | [*] [WARN] |
| Info | ℹ️ 🔵 | [i] [INFO] |
| Progress | ⏳ | [...] |
Rule: Use ASCII characters only in PowerShell scripts.
3. Null Check Patterns
Always Check Before Access
| ❌ Wrong | ✅ Correct |
|---|---|
$array.Count -gt 0 | $array -and $array.Count -gt 0 |
$text.Length | if ($text) { $text.Length } |
4. String Interpolation
Complex Expressions
| ❌ Wrong | ✅ Correct |
|---|---|
"Value: $($obj.prop.sub)" | Store in variable first |
Pattern:
$value = $obj.prop.sub
Write-Output "Value: $value"5. Error Handling
ErrorActionPreference
| Value | Use |
|---|---|
| Stop | Development (fail fast) |
| Continue | Production scripts |
| SilentlyContinue | When errors expected |
Try/Catch Pattern
- Don't return inside try block
- Use finally for cleanup
- Return after try/catch
6. File Paths
Windows Path Rules
| Pattern | Use |
|---|---|
| Literal path | C:\Users\User\file.txt |
| Variable path | Join-Path $env:USERPROFILE "file.txt" |
| Relative | Join-Path $ScriptDir "data" |
Rule: Use Join-Path for cross-platform safety.
7. Array Operations
Correct Patterns
| Operation | Syntax |
|---|---|
| Empty array | $array = @() |
| Add item | $array += $item |
| ArrayList add | `$list.Add($item) |
8. JSON Operations
CRITICAL: Depth Parameter
| ❌ Wrong | ✅ Correct |
|---|---|
ConvertTo-Json | ConvertTo-Json -Depth 10 |
Rule: Always specify -Depth for nested objects.
File Operations
| Operation | Pattern |
|---|---|
| Read | `Get-Content "file.json" -Raw |
| Write | `$data |
9. Common Errors
| Error Message | Cause | Fix |
|---|---|---|
| "parameter 'or'" | Missing parentheses | Wrap cmdlets in () |
| "Unexpected token" | Unicode character | Use ASCII only |
| "Cannot find property" | Null object | Check null first |
| "Cannot convert" | Type mismatch | Use .ToString() |
10. Script Template
# Strict mode
Set-StrictMode -Version Latest
$ErrorActionPreference = "Continue"
# Paths
$ScriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
# Main
try {
# Logic here
Write-Output "[OK] Done"
exit 0
}
catch {
Write-Warning "Error: $_"
exit 1
}Remember: PowerShell has unique syntax rules. Parentheses, ASCII-only, and null checks are non-negotiable.
© xenitV1, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/powershell-windows of xenitV1/Antigravity-Workflows.
Open the folder on GitHubat commit f0a1fa7
Used in 8 other repositories
We found 18 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 8 other GitHub owners. This page covers the copy in xenitV1/Antigravity-Workflows, which our catalogue first saw on October 7, 2026.
- involvex/youtube-music-cli.agents/skills/powershell-windows.claude/skills/powershell-windows
- davila7/claude-code-templatescli-tool/components/skills/development/powershell-windows
- aiskillstore/marketplaceskills/sickn33/powershell-windows
- sickn33/agentic-awesome-skillsskills/powershell-windowsplugins/agentic-awesome-skills/skills/powershell-windows+1 more
- agent-skills-hub/agent-skills-hubskills/powershell-windows
- lingxling/awesome-skills-cnantigravity-awesome-skills/skills/powershell-windowsantigravity-awesome-skills/plugins/agentic-awesome-skills/skills/powershell-windows+1 more
- benjaminasterA/antigravity-awesome-skillsskills/powershell-windows
- henryalouf/ruflow.agents/skills/powershell-windows.agents/skills/antigravity-awesome-skills/skills/powershell-windows+4 more
Compare with similar skills
Powershell Windows next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Powershell Windows this skillxenitV1/Antigravity-Workflows | 130 | 8 repos | ~864 | Automated safety check: Notes | MIT | |
| Mole Bug Patternstw93/Mole | 69k | — | ~2k | Automated safety check: Pass | GPL-3.0 | |
| Native Data FetchingCherryHQ/cherry-studio-app | 4k | 6 repos | ~2.9k | Automated safety check: Notes | MIT | |
| Rust Best Practicesfarm-fe/farm | 5.6k | 3 repos | ~1.1k | Automated safety check: Pass | MIT | |
| Windows App SDK Issue Triage Reportmicrosoft/WindowsAppSDK | 4.7k | — | ~3.4k | Automated safety check: Pass | Apache-2.0 | |
| R Function Input Validationtidyverse/dplyr | 5.1k | 1 repos | ~2.3k | Automated safety check: Pass | Custom licence |
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Windows App SDK Issue Triage Report
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R Function Input Validation
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Error Handling
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统一错误处理系统。在添加 API 端点、修改错误处理、添加前端 API 调用、编写错误相关测试时使用. An agent skill from microsoft/data-formulator.
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Related
Works with
Categories
Questions about Powershell Windows
What does Powershell Windows do?
PowerShell Windows patterns. An agent skill from xenitV1/Antigravity-Workflows. Powershell Windows is an agent skill from xenitV1/Antigravity-Workflows. PowerShell Windows patterns.
When should I use Powershell Windows?
Powershell Windows fits situations like: tasks that involve Error handling.
How do I install Powershell Windows in Claude Code?
Run `npx skills add xenitV1/Antigravity-Workflows --skill powershell-windows -a claude-code`. Or copy the skill folder (skills/powershell-windows in xenitV1/Antigravity-Workflows) into .claude/skills/powershell-windows in your project. Claude Code loads it when a task matches its description.
How do I install Powershell Windows in Codex?
Run `npx skills add xenitV1/Antigravity-Workflows --skill powershell-windows -a codex`. Or copy the skill folder (skills/powershell-windows in xenitV1/Antigravity-Workflows) into .agents/skills/powershell-windows in your project. Codex loads it when a task matches its description.
Can I use Powershell Windows in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add xenitV1/Antigravity-Workflows --skill powershell-windows -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/powershell-windows, .gemini/skills/powershell-windows, .github/skills/powershell-windows and .opencode/skills/powershell-windows in your project.
What does Powershell Windows need to run?
SKILL.md names no scripts, command-line tools or credentials: Powershell Windows is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Write, Edit, Glob, Grep, Bash.
Does Powershell Windows access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Powershell Windows safe to install?
Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
What licence does Powershell Windows use?
Powershell Windows is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Powershell Windows use?
About 864 tokens (SKILL.md is roughly 3.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Powershell Windows?
Skills that share tags, products or a category with Powershell Windows: Mole Bug Patterns (tw93/Mole, 69k stars), Native Data Fetching (CherryHQ/cherry-studio-app, 4k stars), Rust Best Practices (farm-fe/farm, 5.6k stars) and Windows App SDK Issue Triage Report (microsoft/WindowsAppSDK, 4.7k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Powershell Windows?
xenitV1 (a GitHub user) maintains it in xenitV1/Antigravity-Workflows, which has 130 GitHub stars. The repository holds 42 skills in this directory. The repository was last updated on January 14, 2026.
Source: xenitV1/Antigravity-Workflows on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.