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.
Expert in strict POSIX sh scripting for maximum portability across Unix-like systems.
Install Posix Shell Pro
$ npx skills add aiskillstore/marketplace --skill posix-shell-pro -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install aiskillstore/marketplace posix-shell-pro --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/aiskillstore/marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/sickn33/posix-shell-pro .claude/skills/posix-shell-pro && 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 "posix-shell-pro" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/posix-shell-pro into .claude/skills/posix-shell-pro/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "posix-shell-pro", 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/aiskillstore/marketplace/tree/main/skills/sickn33/posix-shell-proType 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 aiskillstore/marketplace --skill posix-shell-pro -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install aiskillstore/marketplace posix-shell-pro --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/sickn33/posix-shell-pro .agents/skills/posix-shell-pro && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "posix-shell-pro" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/posix-shell-pro into .agents/skills/posix-shell-pro/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "posix-shell-pro", 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 aiskillstore/marketplace --skill posix-shell-pro -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install aiskillstore/marketplace posix-shell-pro --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/sickn33/posix-shell-pro .cursor/skills/posix-shell-pro && 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 "posix-shell-pro" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/posix-shell-pro into .cursor/skills/posix-shell-pro/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "posix-shell-pro", 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/aiskillstore/marketplace.git --path skills/sickn33/posix-shell-pro--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 aiskillstore/marketplace --skill posix-shell-pro -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install aiskillstore/marketplace posix-shell-pro --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/sickn33/posix-shell-pro .gemini/skills/posix-shell-pro && 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 "posix-shell-pro" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/posix-shell-pro into .gemini/skills/posix-shell-pro/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "posix-shell-pro", 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 aiskillstore/marketplace posix-shell-proInstalls 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 aiskillstore/marketplace --skill posix-shell-pro -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/sickn33/posix-shell-pro .github/skills/posix-shell-pro && 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 "posix-shell-pro" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/posix-shell-pro into .github/skills/posix-shell-pro/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "posix-shell-pro", 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 aiskillstore/marketplace --skill posix-shell-pro -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install aiskillstore/marketplace posix-shell-pro --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/sickn33/posix-shell-pro .opencode/skills/posix-shell-pro && 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 "posix-shell-pro" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/posix-shell-pro into .opencode/skills/posix-shell-pro/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "posix-shell-pro", 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
posix-shell-pro- GitHub stars
- 430
- Used in
- 7 other repos
- Token cost
- ~3.8k tokens
- SKILL.md length
- 1,796 words
- Files
- 2
- Skills in repo
- 1,044
- Repo updated
- First seen
- Licence
- None found
At a glance
Expert in strict POSIX sh scripting for maximum portability across Unix-like systems.
- Tasks that involve Shell scripting
- SKILL.md covers Use this skill when, Do not use this skill when, Instructions and Focus Areas, plus 19 more sections
- Calls shellcheck and sh
What it does
Posix Shell Pro is an agent skill from aiskillstore/marketplace. Expert in strict POSIX sh scripting for maximum portability across Unix-like systems. Specializes in shell scripts that run on any POSIX-compliant shell (dash, ash, sh, bash --posix).
Its SKILL.md is about 3.8k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `skill-report.json`).
It sits in Development, covering Shell scripting. It works with Bash. The repository describes itself as: Security-audited skills for Claude, Codex & Claude Code. One-click install, quality verified.
When your agent uses it
- Tasks that involve Shell scripting
Example prompts
- “/posix-shell-pro”
What it can do on your machine
Read from SKILL.md and the folder at commit 755bc35. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
shellchecksh
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
pubs.opengroup.orggnu.orgetalabs.netsuckless.orgdocs.freebsd.orgmanpages.debian.org
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
Posix Shell Pro loads about 3.8k tokens when it runs. Until then it costs about 50 tokens; SKILL.md has 1,796 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 passed
The automated check found no risky patterns in SKILL.md.
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
Without a licence we can't republish the file, so here is its outline and opening line. It has 1,796 words (~3,800 tokens).
“Since POSIX sh lacks arrays, use these patterns:”
- name
- posix-shell-pro
- metadata.model
- sonnet
Files
SKILL.md and 1 other file in skills/sickn33/posix-shell-pro of aiskillstore/marketplace.
- SKILL.md
- skill-report.json
Open the folder on GitHubat commit 755bc35
Used in 7 other repositories
We found 16 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 7 other GitHub owners. This page covers the copy in aiskillstore/marketplace, which our catalogue first saw on October 7, 2026.
- sickn33/agentic-awesome-skillsskills/posix-shell-proplugins/agentic-awesome-skills/skills/posix-shell-pro+1 more
- rmyndharis/antigravity-skillsskills/posix-shell-pro
- Dokhacgiakhoa/Agent-Skills-4-Vibe-Coding-CLI.agent/skills/posix-shell-pro
- agent-skills-hub/agent-skills-hubskills/posix-shell-pro
- lingxling/awesome-skills-cnantigravity-awesome-skills/skills/posix-shell-proantigravity-awesome-skills/plugins/agentic-awesome-skills/skills/posix-shell-pro+1 more
- benjaminasterA/antigravity-awesome-skillsskills/posix-shell-pro
- henryalouf/ruflow.agents/skills/posix-shell-pro.agents/skills/antigravity-awesome-skills/skills/posix-shell-pro+4 more
Compare with similar skills
Posix Shell Pro 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 |
|---|---|---|---|---|---|---|
| Posix Shell Pro this skillaiskillstore/marketplace | 430 | 7 repos | ~3.8k | Automated safety check: Pass | None | |
| Mole Bug Patternstw93/Mole | 70k | — | ~2k | Automated safety check: Pass | GPL-3.0 | |
| CLI DeveloperJeffallan/claude-skills | 12k | 1 repos | ~1.2k | Automated safety check: Pass | MIT | |
| JSON Processing with jqcharmbracelet/crush | 29k | — | ~746 | Automated safety check: Pass | Custom licence | |
| Shellm Architecture Referencelaude-institute/headlong | 1.2k | — | ~2k | Automated safety check: Notes | Apache-2.0 | |
| Cppcrazyguitar/cppcheatsheet | 290 | — | ~1.8k | Automated safety check: Pass | MIT |
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Related
Works with
Categories
Questions about Posix Shell Pro
What does Posix Shell Pro do?
Expert in strict POSIX sh scripting for maximum portability across Unix-like systems. Posix Shell Pro is an agent skill from aiskillstore/marketplace. Expert in strict POSIX sh scripting for maximum portability across Unix-like systems.
When should I use Posix Shell Pro?
Posix Shell Pro fits situations like: tasks that involve Shell scripting.
How do I install Posix Shell Pro in Claude Code?
Run `npx skills add aiskillstore/marketplace --skill posix-shell-pro -a claude-code`. Or copy the skill folder (skills/sickn33/posix-shell-pro in aiskillstore/marketplace) into .claude/skills/posix-shell-pro in your project. Claude Code loads it when a task matches its description.
How do I install Posix Shell Pro in Codex?
Run `npx skills add aiskillstore/marketplace --skill posix-shell-pro -a codex`. Or copy the skill folder (skills/sickn33/posix-shell-pro in aiskillstore/marketplace) into .agents/skills/posix-shell-pro in your project. Codex loads it when a task matches its description.
Can I use Posix Shell Pro 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 aiskillstore/marketplace --skill posix-shell-pro -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/posix-shell-pro, .gemini/skills/posix-shell-pro, .github/skills/posix-shell-pro and .opencode/skills/posix-shell-pro in your project.
What does Posix Shell Pro need to run?
Going by SKILL.md and its folder, Posix Shell Pro needs the command-line tools its instructions call (shellcheck and sh).
Does Posix Shell Pro access the network?
SKILL.md names 6 domains. As links in the text: pubs.opengroup.org, gnu.org, etalabs.net, suckless.org, docs.freebsd.org and manpages.debian.org. This is read from the text; nothing was executed.
Is Posix Shell Pro safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Posix Shell Pro use?
No licence was found for Posix Shell Pro or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Posix Shell Pro use?
About 3.8k tokens (SKILL.md is roughly 15k 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 Posix Shell Pro?
Skills that share tags, products or a category with Posix Shell Pro: Mole Bug Patterns (tw93/Mole, 70k stars), CLI Developer (Jeffallan/claude-skills, 12k stars), JSON Processing with jq (charmbracelet/crush, 29k stars) and Shellm Architecture Reference (laude-institute/headlong, 1.2k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Posix Shell Pro?
aiskillstore (a GitHub organization) maintains it in aiskillstore/marketplace, which has 430 GitHub stars. The repository holds 1,044 skills in this directory. The repository was last updated on October 9, 2026.
Source: aiskillstore/marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.