Rust Best Practices
farm-fe/farm
Guide for writing idiomatic Rust code based on Apollo GraphQL's best practices handbook.
Write AST-based code search and rewrite rules using ast-grep YAML.
Install Ast Grep Rule Crafter
$ npx skills add aiskillstore/marketplace --skill ast-grep-rule-crafter -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install aiskillstore/marketplace ast-grep-rule-crafter --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/hylarucoder/ast-grep-rule-crafter .claude/skills/ast-grep-rule-crafter && 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 "ast-grep-rule-crafter" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/hylarucoder/ast-grep-rule-crafter into .claude/skills/ast-grep-rule-crafter/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ast-grep-rule-crafter", 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/hylarucoder/ast-grep-rule-crafterType 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 ast-grep-rule-crafter -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install aiskillstore/marketplace ast-grep-rule-crafter --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/hylarucoder/ast-grep-rule-crafter .agents/skills/ast-grep-rule-crafter && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "ast-grep-rule-crafter" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/hylarucoder/ast-grep-rule-crafter into .agents/skills/ast-grep-rule-crafter/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ast-grep-rule-crafter", 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 ast-grep-rule-crafter -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install aiskillstore/marketplace ast-grep-rule-crafter --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/hylarucoder/ast-grep-rule-crafter .cursor/skills/ast-grep-rule-crafter && 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 "ast-grep-rule-crafter" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/hylarucoder/ast-grep-rule-crafter into .cursor/skills/ast-grep-rule-crafter/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ast-grep-rule-crafter", 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/hylarucoder/ast-grep-rule-crafter--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 ast-grep-rule-crafter -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install aiskillstore/marketplace ast-grep-rule-crafter --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/hylarucoder/ast-grep-rule-crafter .gemini/skills/ast-grep-rule-crafter && 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 "ast-grep-rule-crafter" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/hylarucoder/ast-grep-rule-crafter into .gemini/skills/ast-grep-rule-crafter/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ast-grep-rule-crafter", 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 ast-grep-rule-crafterInstalls 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 ast-grep-rule-crafter -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/hylarucoder/ast-grep-rule-crafter .github/skills/ast-grep-rule-crafter && 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 "ast-grep-rule-crafter" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/hylarucoder/ast-grep-rule-crafter into .github/skills/ast-grep-rule-crafter/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ast-grep-rule-crafter", 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 ast-grep-rule-crafter -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 ast-grep-rule-crafter --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/hylarucoder/ast-grep-rule-crafter .opencode/skills/ast-grep-rule-crafter && 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 "ast-grep-rule-crafter" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/hylarucoder/ast-grep-rule-crafter into .opencode/skills/ast-grep-rule-crafter/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ast-grep-rule-crafter", 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
ast-grep-rule-crafter- GitHub stars
- 433
- Token cost
- ~873 tokens
- SKILL.md length
- 216 words
- Files
- 4 (incl. references)
- Skills in repo
- 1,044
- Repo updated
- First seen
- Licence
- None found
At a glance
Write AST-based code search and rewrite rules using ast-grep YAML.
- The user mentions ast-grep
- SKILL.md covers Quick Start, Project Configuration, Rule Workflow and Essential Syntax, plus 3 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Tree-sitter patterns
What it does
Ast Grep Rule Crafter is an agent skill from aiskillstore/marketplace. Write AST-based code search and rewrite rules using ast-grep YAML. Create linting rules, code modernizations, and API migrations with auto-fix. Use when the user mentions ast-grep, tree-sitter patterns, code search rules, lint rules with YAML, AST matching, or code refactoring patterns.
Its SKILL.md is about 870 tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `references/common-patterns.md`, `references/rule-syntax.md` and `skill-report.json`).
It sits in Development, covering Linting and formatting, Codebase onboarding and Legacy modernization. The repository describes itself as: Security-audited skills for Claude, Codex & Claude Code. One-click install, quality verified.
When your agent uses it
- The user mentions ast-grep
- Tree-sitter patterns
- Code search rules
- Lint rules with YAML
Example prompts
- “/ast-grep-rule-crafter”
Requirements
- Python 3
What it can do on your machine
Read from SKILL.md and the folder at commit 44923f3. 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
No scripts in the folder and no shell commands in SKILL.md (its code samples are yaml and bash).
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
Ast Grep Rule Crafter loads about 873 tokens when it runs, and up to ~2.4k if it reads all its reference files. Until then it costs about 77 tokens; SKILL.md has 216 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 216 words (~873 tokens).
“ast-grep uses tree-sitter to parse code into AST, enabling precise pattern matching. Rules are defined in YAML for linting, searching, and rewriting code.”
- name
- ast-grep-rule-crafter
Files
SKILL.md and 3 other files (references) in skills/hylarucoder/ast-grep-rule-crafter of aiskillstore/marketplace.
- SKILL.md
- references/common-patterns.md
- references/rule-syntax.md
- skill-report.json
Open the folder on GitHubat commit 44923f3
Compare with similar skills
Ast Grep Rule Crafter 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 |
|---|---|---|---|---|---|---|
| Ast Grep Rule Crafter this skillaiskillstore/marketplace | 433 | — | ~873 | Automated safety check: Pass | None | |
| Rust Best Practicesfarm-fe/farm | 5.6k | 3 repos | ~1.1k | Automated safety check: Pass | MIT | |
| Code Refactoring Workflowluongnv89/claude-howto | 42k | — | ~3.1k | Automated safety check: Pass | MIT | |
| File Good First BugBrowserWorks/waterfox-android | 379 | 2 repos | ~2k | Automated safety check: Pass | Custom licence | |
| Unslop CodeJCarterJohnson/vibecoded-design-tells | 513 | — | ~2.5k | Automated safety check: Pass | Custom licence | |
| Code Quality Gatefengshao1227/ccg-workflow | 5.9k | — | ~593 | Automated safety check: Notes | MIT |
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luongnv89/claude-howto
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File Good First Bug
BrowserWorks/waterfox-android
A skill your agent uses when the user wants to file good-first-bugs in Bugzilla for Firefox.
Unslop Code
JCarterJohnson/vibecoded-design-tells
Strips the tells that make source code read as AI-generated and forces code that fits the project instead of the model's default average.
Code Quality Gate
fengshao1227/ccg-workflow
Scans code for complexity, long functions, duplicated blocks, naming problems and code smells with a Node script, then reports and suggests refactors.
Ast Grep
BiFangKNT/mtga
Write and debug ast-grep rules for structural code search and rewrite.
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Related
Categories
Questions about Ast Grep Rule Crafter
What does Ast Grep Rule Crafter do?
Write AST-based code search and rewrite rules using ast-grep YAML. Ast Grep Rule Crafter is an agent skill from aiskillstore/marketplace. Write AST-based code search and rewrite rules using ast-grep YAML.
When should I use Ast Grep Rule Crafter?
Ast Grep Rule Crafter fits situations like: the user mentions ast-grep; tree-sitter patterns; code search rules; lint rules with YAML.
How do I install Ast Grep Rule Crafter in Claude Code?
Run `npx skills add aiskillstore/marketplace --skill ast-grep-rule-crafter -a claude-code`. Or copy the skill folder (skills/hylarucoder/ast-grep-rule-crafter in aiskillstore/marketplace) into .claude/skills/ast-grep-rule-crafter in your project. Claude Code loads it when a task matches its description.
How do I install Ast Grep Rule Crafter in Codex?
Run `npx skills add aiskillstore/marketplace --skill ast-grep-rule-crafter -a codex`. Or copy the skill folder (skills/hylarucoder/ast-grep-rule-crafter in aiskillstore/marketplace) into .agents/skills/ast-grep-rule-crafter in your project. Codex loads it when a task matches its description.
Can I use Ast Grep Rule Crafter 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 ast-grep-rule-crafter -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/ast-grep-rule-crafter, .gemini/skills/ast-grep-rule-crafter, .github/skills/ast-grep-rule-crafter and .opencode/skills/ast-grep-rule-crafter in your project.
What does Ast Grep Rule Crafter need to run?
SKILL.md names no scripts, command-line tools or credentials: Ast Grep Rule Crafter is instructions for the agent only. Our summary lists: Python 3.
Does Ast Grep Rule Crafter 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 Ast Grep Rule Crafter 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 Ast Grep Rule Crafter use?
No licence was found for Ast Grep Rule Crafter or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Ast Grep Rule Crafter use?
About 873 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. Its references folder adds about 1.6k tokens, read only when the agent opens those files.
What are the alternatives to Ast Grep Rule Crafter?
Skills that share tags, products or a category with Ast Grep Rule Crafter: Rust Best Practices (farm-fe/farm, 5.6k stars), Code Refactoring Workflow (luongnv89/claude-howto, 42k stars), File Good First Bug (BrowserWorks/waterfox-android, 379 stars) and Unslop Code (JCarterJohnson/vibecoded-design-tells, 513 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Ast Grep Rule Crafter?
aiskillstore (a GitHub organization) maintains it in aiskillstore/marketplace, which has 433 GitHub stars. The repository holds 1,044 skills in this directory. The repository was last updated on October 10, 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.