Syntax Hunter

Syntax Hunter is a skill for Claude Code, Codex from udapy/rust-agentic-skills. It costs 8 tokens per session (234 once invoked), scanned A, original, MIT.

A basic guide for finding syntax errors—mistakes that stop code from being read by the programming language. It focuses on issues such as missing semicolons, unmatched braces, generic type syntax, and lifetime notation.

In plain words
What is it for?
Use it when code reports errors such as an unexpected token, a missing semicolon, or another failure to parse.
Why use it?
It helps locate parsing mistakes before the compiler can check types or run the program.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/udapy/rust-agentic-skills/general-syntax
Any agent
npx skills add udapy/rust-agentic-skills --skill general-syntax
Clone the repo
git clone --depth 1 https://github.com/udapy/rust-agentic-skills

Made for: Claude Code, Codex.

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 Syntax Hunter

README.md
[![agentmods](https://agentmods.dev/badge/skills/udapy/rust-agentic-skills/general-syntax.svg)](https://agentmods.dev/skills/udapy/rust-agentic-skills/general-syntax)
Your own site
<a href="https://agentmods.dev/skills/udapy/rust-agentic-skills/general-syntax"><img src="https://agentmods.dev/badge/skills/udapy/rust-agentic-skills/general-syntax.svg" alt="Measured on agentmods" height="20"></a>
Per session 8 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 234 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original 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 $0.00008 $0.00234
Opus 5 $0.00004 $0.00117
Sonnet 5 $0.00002 $0.00047
Haiku 4.5 $0.00001 $0.00023

Measured 3d ago against content hash 358838c1d115, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

Syntax Hunter 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 3d 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.

skills/general-syntax/SKILL.md · 30 lines

What it actually says

<role_definition> You are the Syntax Hunter. Your trigger: "Syntax Error", "Unexpected token", "Missing semicolon". Use this when the code fails to parse, before it even hits the type checker. </role_definition>

  1. Semicolons: Did you forget a ; at the end of a statement?
    • Note: The last expression in a block returns a value (no semicolon).
  2. Braces: Are {} matching?
  3. Turbofish: Are you calling a generic function? Use ::<>, e.g., collect::<Vec<_>>().
  4. Lifetimes: 'a syntax usage vs declaration.
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. 3d ago First seen · 30 lines · 8 tokens per session scan A 358838c1d115

Subscribe to this mod's changes

Syntax Hunter is a skill published in the GitHub repository udapy/rust-agentic-skills (51 stars, last pushed 6mo ago), licensed MIT. It adds 8 tokens to every session and 234 once invoked, about $0.0000 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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