ast-grep

ast-grep is a skill for Windsurf from OnlyTerp/windsurf-unlocked. It costs 66 tokens per session (1,279 once invoked), scanned A, original, no licence file.

A code-search and refactoring tool that understands program structure, not just matching text. It uses the abstract syntax tree, a structured representation of source code.

In plain words
What is it for?
Use it for structure-aware searches, refactors, codemods, and queries such as finding every construct that lacks a particular property.
Why use it?
Plain text search can miss code based on how it is written or accidentally change unrelated text. Structural searches and edits can target the intended code patterns.

Skill for Windsurf

Written for Windsurf: installed under .windsurf/.

Good fit Use it for structure-aware searches, refactors, codemods, and queries such as finding every construct that lacks a particular property.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/onlyterp/windsurf-unlocked/ast-grep
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add OnlyTerp/windsurf-unlocked --skill ast-grep
Clone the repo
git clone --depth 1 https://github.com/OnlyTerp/windsurf-unlocked

Made for: Windsurf.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for ast-grep

README.md
[![agentmods](https://agentmods.dev/badge/skills/onlyterp/windsurf-unlocked/ast-grep/github.svg)](https://agentmods.dev/skills/onlyterp/windsurf-unlocked/ast-grep)
Your own site
<a href="https://agentmods.dev/skills/onlyterp/windsurf-unlocked/ast-grep"><img src="https://agentmods.dev/badge/skills/onlyterp/windsurf-unlocked/ast-grep/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for ast-grep

Your own site · 80×15
<a href="https://agentmods.dev/skills/onlyterp/windsurf-unlocked/ast-grep"><img src="https://agentmods.dev/badge/skills/onlyterp/windsurf-unlocked/ast-grep.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 66 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,279 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00066 $0.01279
Opus 5 $0.00033 $0.00639
Sonnet 5 $0.00013 $0.00256
Haiku 4.5 $0.00007 $0.00128

Measured 11d ago against content hash 2cbd7ea417d6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

ast-grep scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

starter/.windsurf/skills/ast-grep/SKILL.md · 129 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 11d ago First seen · 129 lines · 66 tokens per session scan A 2cbd7ea417d6

Subscribe to this mod's changes

ast-grep is a skill published in the GitHub repository OnlyTerp/windsurf-unlocked (49 stars, last pushed 4mo ago), with no licence file. It adds 66 tokens to every session and 1,279 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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