ast-grep SKILL.md skillA
ast-grep from codeatcode/oss-ai-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add codeatcode/oss-ai-skills/ast-grep@v1.0.1Pins v1.0.1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- codeatcode/oss-ai-skills
- Path
tool/ast-grep/SKILL.md- Versions recorded
- 4
- Latest version
- v1.0.1, committed Oct 28, 2026
- First version recorded
- Apr 20, 2026
- Size
- 13,598 bytes
- Repository stars
- 28
- License
- GPL-3.0
Use when doing structural code search and rewriting - ast-grep linting, refactoring, multi-language patterns.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
> **Objective:** Use this skill to prevent false positives in structural code search and catch security/correctness defects by enforcing pattern discipline, constraint usage, and rule authoring practices below. # ast-grep Fast and user-friendly tool for large-scale code searching, linting, and rewriting using AST patterns. ## Overview ast-grep (sg) is a CLI tool that searches code based on Abstract Syntax Tree patterns, similar to syntax-aware grep/sed. It supports multiple languages and can perform automated code refactoring. - **Fast** - Written in Rust, processes code quickly - **Polyglot** - Supports JavaScript, TypeScript, Python, Go, Rust, Java, C, C++, and more - **Structural** - Matches code by AST patterns, not regex - **Rewrite** - Automated code refactoring with metavariables --- ## Installation ```bash # Via cargo cargo install ast-grep # Via npm npm install -g ast-grep # Download pre-built binary curl -L https://github.com/ast-grep/ast-grep/releases/download/nightly/ast-grep-x86_64-unknown-linux-musl.tar.gz | tar xz ``` --- ## Worked Rules: Real Defect Classes …
Read the whole file at its exact version.
How to install
mdr add codeatcode/oss-ai-skills/ast-grep@sha256:96b64ee113792887The line at the top of this page pins the label v1.0.1, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_ofsgmfu6nn6jhx36)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Apr 20, 2026 and Oct 28, 2026, about one every 64 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.0.1 latest | 2026-10-28 | 83beb90 | 13,598 B | A | view · diff |
| v1.0.1 | 2026-10-01 | 268819e | 13,333 B | A | view · diff |
| v1.0.1 | 2026-09-23 | f8bf298 | 8,803 B | A | view · diff |
| v1.0.0 | 2026-04-20 | e5744c4 | 8,768 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (13598 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
codeatcode/oss-ai-skills · 28 stars · license GPL-3.0 · pushed 2026-10-28 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_ofsgmfu6nn6jhx36 GET https://markdownregistry.com/api/v1/resolve?ref=codeatcode/oss-ai-skills/ast-grep GET https://markdownregistry.com/api/v1/blob/96b64ee113792887504b0408a8ffa4fb5cd2d68b458f009bacaece586678c9e9
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
More from codeatcode/oss-ai-skills
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