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.
Explains the jq command built into Crush for querying, filtering and reshaping JSON, including its supported flags and where it differs from standard jq.
Install JSON Processing with jq
$ npx skills add charmbracelet/crush --skill jq -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install charmbracelet/crush jq --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/charmbracelet/crush.git skills-src && mkdir -p .claude/skills && cp -r skills-src/internal/skills/builtin/jq .claude/skills/jq && 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 "jq" agent skill from https://github.com/charmbracelet/crush/tree/main/internal/skills/builtin/jq into .claude/skills/jq/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jq", 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/charmbracelet/crush/tree/main/internal/skills/builtin/jqType 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 charmbracelet/crush --skill jq -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install charmbracelet/crush jq --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/charmbracelet/crush.git skills-src && mkdir -p .agents/skills && cp -r skills-src/internal/skills/builtin/jq .agents/skills/jq && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "jq" agent skill from https://github.com/charmbracelet/crush/tree/main/internal/skills/builtin/jq into .agents/skills/jq/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jq", 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 charmbracelet/crush --skill jq -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install charmbracelet/crush jq --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/charmbracelet/crush.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/internal/skills/builtin/jq .cursor/skills/jq && 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 "jq" agent skill from https://github.com/charmbracelet/crush/tree/main/internal/skills/builtin/jq into .cursor/skills/jq/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jq", 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/charmbracelet/crush.git --path internal/skills/builtin/jq--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 charmbracelet/crush --skill jq -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install charmbracelet/crush jq --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/charmbracelet/crush.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/internal/skills/builtin/jq .gemini/skills/jq && 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 "jq" agent skill from https://github.com/charmbracelet/crush/tree/main/internal/skills/builtin/jq into .gemini/skills/jq/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jq", 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 charmbracelet/crush jqInstalls 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 charmbracelet/crush --skill jq -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/charmbracelet/crush.git skills-src && mkdir -p .github/skills && cp -r skills-src/internal/skills/builtin/jq .github/skills/jq && 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 "jq" agent skill from https://github.com/charmbracelet/crush/tree/main/internal/skills/builtin/jq into .github/skills/jq/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jq", 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 charmbracelet/crush --skill jq -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install charmbracelet/crush jq --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/charmbracelet/crush.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/internal/skills/builtin/jq .opencode/skills/jq && 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 "jq" agent skill from https://github.com/charmbracelet/crush/tree/main/internal/skills/builtin/jq into .opencode/skills/jq/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "jq", 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
jq- GitHub stars
- 29k
- Token cost
- ~746 tokens
- SKILL.md length
- 273 words
- Files
- 1
- Skills in repo
- 5
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Explains the jq command built into Crush for querying, filtering and reshaping JSON, including its supported flags and where it differs from standard jq.
- Pulling fields out of an API response or log line
- SKILL.md covers Supported Flags, Differences from Standard jq, Common Patterns and Tips
- Calls jq
- Reshaping a JSON config into a different structure
What it does
Crush ships `jq` inside its bash tool, built on the pure-Go gojq library, so no external binary is needed. The skill lists the supported flags (raw and compact output, slurp, null input, exit status, raw input, `--arg` and `--argjson`) and notes that file arguments after the filter work as usual. Worked patterns cover extracting a field, filtering an array, reshaping objects, binding variables, slurping several values and building JSON from nothing with `-n`.
Because the engine is gojq, a few behaviors differ from standard jq: object keys are always sorted, large integers keep full precision, and strings can be indexed. Options such as `--stream`, `--seq`, `--from-file`, `--slurpfile`, `--rawfile` and `--args`, plus some regex features like look-around, are not available, and the YAML flags are not exposed.
When your agent uses it
- Pulling fields out of an API response or log line
- Reshaping a JSON config into a different structure
- Debugging a jq filter that behaves differently from standard jq
Example prompts
- “List every dependency name in package.json using jq.”
- “Turn this array of users into an object keyed by email address.”
- “Build a JSON payload from a host and port without hand-quoting it.”
Requirements
- Crush's bash tool, which includes jq
What it can do on your machine
Read from SKILL.md and the folder at commit 140e8cb. 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:
jq
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
JSON Processing with jq loads about 746 tokens when it runs. Until then it costs about 58 tokens; SKILL.md has 273 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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 273 words (~746 tokens).
“Crush ships a built-in jq command (via github.com/itchyny/gojq) available in the bash tool. No external binary is required.”
- name
- jq
Files
Just SKILL.md in internal/skills/builtin/jq of charmbracelet/crush.
Open the folder on GitHubat commit 140e8cb
Compare with similar skills
JSON Processing with jq 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 |
|---|---|---|---|---|---|---|
| JSON Processing with jq this skillcharmbracelet/crush | 29k | — | ~746 | Automated safety check: Pass | Custom licence | |
| Mole Bug Patternstw93/Mole | 70k | — | ~2k | Automated safety check: Pass | GPL-3.0 | |
| CLI DeveloperJeffallan/claude-skills | 12k | 2 repos | ~1.2k | Automated safety check: Pass | MIT | |
| Shellm Architecture Referencelaude-institute/headlong | 1.2k | — | ~2k | Automated safety check: Notes | Apache-2.0 | |
| Bash Scriptingpromovaweb/setupvibe | 101 | 5 repos | ~1.2k | Automated safety check: Pass | GPL-3.0 | |
| Cppcrazyguitar/cppcheatsheet | 290 | — | ~1.8k | Automated safety check: Pass | MIT |
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Questions about JSON Processing with jq
What does JSON Processing with jq do?
Explains the jq command built into Crush for querying, filtering and reshaping JSON, including its supported flags and where it differs from standard jq. Crush ships `jq` inside its bash tool, built on the pure-Go gojq library, so no external binary is needed. The skill lists the supported flags (raw and compact output, slurp, null input, exit status, raw input, `--arg` and `--argjson`) and notes that file arguments after the filter work as usual.
When should I use JSON Processing with jq?
JSON Processing with jq fits situations like: pulling fields out of an API response or log line; reshaping a JSON config into a different structure; debugging a jq filter that behaves differently from standard jq.
How do I install JSON Processing with jq in Claude Code?
Run `npx skills add charmbracelet/crush --skill jq -a claude-code`. Or copy the skill folder (internal/skills/builtin/jq in charmbracelet/crush) into .claude/skills/jq in your project. Claude Code loads it when a task matches its description.
How do I install JSON Processing with jq in Codex?
Run `npx skills add charmbracelet/crush --skill jq -a codex`. Or copy the skill folder (internal/skills/builtin/jq in charmbracelet/crush) into .agents/skills/jq in your project. Codex loads it when a task matches its description.
Can I use JSON Processing with jq 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 charmbracelet/crush --skill jq -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/jq, .gemini/skills/jq, .github/skills/jq and .opencode/skills/jq in your project.
What does JSON Processing with jq need to run?
Going by SKILL.md and its folder, JSON Processing with jq needs the command-line tools its instructions call (jq). Our summary lists: Crush's bash tool, which includes jq.
Does JSON Processing with jq 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 JSON Processing with jq 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 JSON Processing with jq use?
JSON Processing with jq has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does JSON Processing with jq use?
About 746 tokens (SKILL.md is roughly 3k 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 JSON Processing with jq?
Skills that share tags, products or a category with JSON Processing with jq: Mole Bug Patterns (tw93/Mole, 70k stars), CLI Developer (Jeffallan/claude-skills, 12k stars), Shellm Architecture Reference (laude-institute/headlong, 1.2k stars) and Bash Scripting (promovaweb/setupvibe, 101 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains JSON Processing with jq?
charmbracelet (a GitHub organization) maintains it in charmbracelet/crush, which has 28,533 GitHub stars. The repository holds 5 skills in this directory. The repository was last updated on October 7, 2026.
Source: charmbracelet/crush on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.