Building Glamorous Tuis
Dicklesworthstone/meta_skill
Build terminal UIs with Charmbracelet (Bubble Tea, Lip Gloss, Gum).
Run shellcheck on shell scripts after editing scripts or when debugging shell errors.
Install Shellck
$ npx skills add instructa/agent-skills --skill shellck -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install instructa/agent-skills shellck --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/instructa/agent-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/shell/shellck .claude/skills/shellck && 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 "shellck" agent skill from https://github.com/instructa/agent-skills/tree/main/skills/shell/shellck into .claude/skills/shellck/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "shellck", 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/instructa/agent-skills/tree/main/skills/shell/shellckType 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 instructa/agent-skills --skill shellck -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install instructa/agent-skills shellck --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/instructa/agent-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/shell/shellck .agents/skills/shellck && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "shellck" agent skill from https://github.com/instructa/agent-skills/tree/main/skills/shell/shellck into .agents/skills/shellck/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "shellck", 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 instructa/agent-skills --skill shellck -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install instructa/agent-skills shellck --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/instructa/agent-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/shell/shellck .cursor/skills/shellck && 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 "shellck" agent skill from https://github.com/instructa/agent-skills/tree/main/skills/shell/shellck into .cursor/skills/shellck/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "shellck", 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/instructa/agent-skills.git --path skills/shell/shellck--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 instructa/agent-skills --skill shellck -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install instructa/agent-skills shellck --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/instructa/agent-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/shell/shellck .gemini/skills/shellck && 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 "shellck" agent skill from https://github.com/instructa/agent-skills/tree/main/skills/shell/shellck into .gemini/skills/shellck/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "shellck", 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 instructa/agent-skills shellckInstalls 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 instructa/agent-skills --skill shellck -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/instructa/agent-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/shell/shellck .github/skills/shellck && 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 "shellck" agent skill from https://github.com/instructa/agent-skills/tree/main/skills/shell/shellck into .github/skills/shellck/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "shellck", 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 instructa/agent-skills --skill shellck -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install instructa/agent-skills shellck --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/instructa/agent-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/shell/shellck .opencode/skills/shellck && 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 "shellck" agent skill from https://github.com/instructa/agent-skills/tree/main/skills/shell/shellck into .opencode/skills/shellck/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "shellck", 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
shellck- GitHub stars
- 139
- Token cost
- ~302 tokens
- SKILL.md length
- 99 words
- Files
- 3 (incl. scripts)
- Skills in repo
- 17
- Repo updated
- First seen
- Licence
- None found
At a glance
Run shellcheck on shell scripts after editing scripts or when debugging shell errors.
- Works in 2 steps: Ensure shellcheck is installed. → From the repo root, run the helper script.
- Linting scripts in a repo (especially scripts/)
- SKILL.md covers Overview, Workflow, Behavior and Resources
- Runs Shell scripts from its folder
What it does
Shellck is an agent skill from instructa/agent-skills. Run shellcheck on shell scripts after editing scripts or when debugging shell errors. Use for linting scripts in a repo (especially scripts/), catching issues like set -u with unset vars, bad subshell usage, or quoting mistakes.
Its SKILL.md is about 300 tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files, including scripts (for example `README.md` and `scripts/run_shellck.sh`).
It sits in Development, covering Shell scripting and Linting and formatting. The repository describes itself as: A curated collection of agent-skills.
When your agent uses it
- Linting scripts in a repo (especially scripts/)
- Catching issues like set -u with unset vars
- Bad subshell usage
- Quoting mistakes
Example prompts
- “/shellck”
Requirements
- A Bash shell
Workflow steps
2 steps, taken from the first numbered list in SKILL.md.
- Ensure shellcheck is installed.
- From the repo root, run the helper script.
What it can do on your machine
Read from SKILL.md and the folder at commit d49c149. 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
Ships 1 file in scripts/ (Shell), which the agent can run.
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
Shellck loads about 302 tokens when it runs. Until then it costs about 59 tokens; SKILL.md has 99 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); the scripts in this folder are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 99 words (~302 tokens).
“Provide a fast, repeatable shellcheck pass for repo scripts. Use this skill after editing shell scripts or when a script fails unexpectedly.”
- name
- shellck
Files
SKILL.md and 2 other files (scripts) in skills/shell/shellck of instructa/agent-skills.
- SKILL.md
- README.md
- scripts/run_shellck.sh
Open the folder on GitHubat commit d49c149
Compare with similar skills
Shellck 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 |
|---|---|---|---|---|---|---|
| Shellck this skillinstructa/agent-skills | 139 | — | ~302 | Automated safety check: Pass | None | |
| Building Glamorous TuisDicklesworthstone/meta_skill | 205 | — | ~3.4k | Automated safety check: Pass | Custom licence | |
| ShellCheck Configurationwshobson/agents | 40k | 10 repos | ~403 | Automated safety check: Pass | MIT | |
| Writing Bash Scriptsarchibate/dotfiles-opencode | 107 | — | ~413 | Automated safety check: Pass | None | |
| Linting Shell Scriptsagntcy/coffeeAgntcy | 112 | — | ~548 | Automated safety check: Pass | Apache-2.0 | |
| Bash Script Validatorakin-ozer/cc-devops-skills | 319 | — | ~1.9k | Automated safety check: Pass | Apache-2.0 |
Similar skills
ShellCheck Configuration
wshobson/agents
Master ShellCheck static analysis configuration and usage for shell script quality. Use when setting up linting infrastructure, fixing code issues, or…
Writing Bash Scripts
archibate/dotfiles-opencode
Create and refactor Bash scripts following conventions (strict mode, fct naming, quoting).
Linting Shell Scripts
agntcy/coffeeAgntcy
Runs task shell:lint (shellcheck + shfmt) against every shell script in the repo and fixes what it reports.
Bash Script Validator
akin-ozer/cc-devops-skills
Validate, lint, audit, or fix bash/shell/.sh scripts via ShellCheck.
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.
More from instructa/agent-skills
All 17 skills in this repoApp Spec Packager
instructa/agent-skills
A skill your agent uses when the user wants to turn an application, product, startup idea, SaaS, mobile app, web app, API, AI product, or internal tool into a production-ready Markdown specification…
Codex Reviewer
instructa/agent-skills
Have Codex review a feature or change from Claude Code, then let Claude address the findings and request verification.
Search Context
instructa/agent-skills
Find, clone, inspect, and summarize high-quality GitHub reference repositories for coding agents.
Secleak Check
instructa/agent-skills
Run or install repo security leak checks with BetterLeaks and Trivy.
Delegate Fable
instructa/agent-skills
Delegate a bounded task from a Codex session to a Fable-powered Cursor Agent in the same Herdr workspace, then wait for and collect the result.
Delegate Grok
instructa/agent-skills
Delegate a bounded task from a Codex session to Grok 4.6 with xhigh reasoning in the same Herdr workspace, then wait for and collect the result.
Related
Categories
Questions about Shellck
What does Shellck do?
Run shellcheck on shell scripts after editing scripts or when debugging shell errors. Shellck is an agent skill from instructa/agent-skills. Run shellcheck on shell scripts after editing scripts or when debugging shell errors.
When should I use Shellck?
Shellck fits situations like: linting scripts in a repo (especially scripts/); catching issues like set -u with unset vars; bad subshell usage; quoting mistakes.
How do I install Shellck in Claude Code?
Run `npx skills add instructa/agent-skills --skill shellck -a claude-code`. Or copy the skill folder (skills/shell/shellck in instructa/agent-skills) into .claude/skills/shellck in your project. Claude Code loads it when a task matches its description.
How do I install Shellck in Codex?
Run `npx skills add instructa/agent-skills --skill shellck -a codex`. Or copy the skill folder (skills/shell/shellck in instructa/agent-skills) into .agents/skills/shellck in your project. Codex loads it when a task matches its description.
Can I use Shellck 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 instructa/agent-skills --skill shellck -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/shellck, .gemini/skills/shellck, .github/skills/shellck and .opencode/skills/shellck in your project.
What does Shellck need to run?
Going by SKILL.md and its folder, Shellck needs a shell for the scripts in its folder. Our summary lists: A Bash shell.
Does Shellck 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 Shellck 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does Shellck use?
No licence was found for Shellck or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Shellck use?
About 302 tokens (SKILL.md is roughly 1.2k 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 Shellck?
Skills that share tags, products or a category with Shellck: Building Glamorous Tuis (Dicklesworthstone/meta_skill, 205 stars), ShellCheck Configuration (wshobson/agents, 40k stars), Writing Bash Scripts (archibate/dotfiles-opencode, 107 stars) and Linting Shell Scripts (agntcy/coffeeAgntcy, 112 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Shellck?
instructa (a GitHub organization) maintains it in instructa/agent-skills, which has 139 GitHub stars. The repository holds 17 skills in this directory. The repository was last updated on September 28, 2026.
Source: instructa/agent-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.