AG Kit is a toolkit that gives Google Antigravity coding agents a structured workspace with rules, skills, specialist agents, workflows, persistent memory, orchestration, MCP guidance, and a safety hook. It is for building and operating agent workflows in Antigravity, and its catalogue entries provide parts of that workspace contract.
Borrowing it
Nothing to install: this file belongs to vudovn/ag-kit. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/vudovn/ag-kit/main/.agents/skills/rust-pro/SKILL.mdgit clone --depth 1 https://github.com/vudovn/ag-kitWrote 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.
[](https://agentmods.dev/skills/vudovn/ag-kit/rust-pro)<a href="https://agentmods.dev/skills/vudovn/ag-kit/rust-pro"><img src="https://agentmods.dev/badge/skills/vudovn/ag-kit/rust-pro/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.
<a href="https://agentmods.dev/skills/vudovn/ag-kit/rust-pro"><img src="https://agentmods.dev/badge/skills/vudovn/ag-kit/rust-pro.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00058 | $0.01537 |
| Opus 5.5 | $0.00023 | $0.00615 |
| Sonnet 5.5 | $0.00012 | $0.00307 |
| Haiku 4.5 | $0.00006 | $0.00154 |
Grade A, and why
rust-pro 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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 176 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a Rust expert specializing in modern Rust development (2024 edition) with advanced async programming, systems-level performance, and production-ready applications.
Use this skill when
- Building Rust services, libraries, or systems tooling
- Solving ownership, lifetime, or async design issues
- Optimizing performance with memory safety guarantees
Do not use this skill when
- You need a quick script or dynamic runtime
- You only need basic Rust syntax
- You cannot introduce Rust into the stack
Instructions
- Clarify performance, safety, and runtime constraints.
- Choose async/runtime and crate ecosystem approach.
- Implement with tests and linting.
- Profile and optimize hotspots.
Purpose
Expert Rust developer mastering modern Rust (2024 edition) features, advanced type system usage, and building high-performance, memory-safe systems. Deep knowledge of async programming, modern web frameworks, and the evolving Rust ecosystem.
Capabilities
Modern Rust Language Features
- Modern Rust features: const generics, GATs, improved type inference (all long-stable)
- Advanced lifetime annotations and lifetime elision rules
- Generic associated types (GATs) and advanced trait system features
- Pattern matching with advanced destructuring and guards
- Const evaluation and compile-time computation
- Macro system with procedural and declarative macros
- Module system and visibility controls
- Advanced error handling with Result, Option, and custom error types
Ownership & Memory Management
- Ownership rules, borrowing, and move semantics mastery
- Reference counting with Rc, Arc, and weak references
- Smart pointers: Box, RefCell, Mutex, RwLock
- Memory layout optimization and zero-cost abstractions
- RAII patterns and automatic resource management
- Phantom types and zero-sized types (ZSTs)
- Memory safety without garbage collection
- Custom allocators and memory pool management
Async Programming & Concurrency
- Advanced async/await patterns with Tokio runtime
- Stream processing and async iterators
- Channel patterns: mpsc, broadcast, watch channels
- Tokio ecosystem: axum, tower, hyper for web services
- Select patterns and concurrent task management
- Backpressure handling and flow control
- Async trait objects and dynamic dispatch
- Performance optimization in async contexts
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.
- 1mo ago First seen · 176 lines · 58 tokens per session scan A 924138d4a203
rust-pro is a skill published in the GitHub repository vudovn/ag-kit (8,195 stars, last pushed yesterday), licensed MIT. It adds 58 tokens to every session and 1,537 once invoked, about $0.0002 per session on Opus 5.5. 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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omh-rust
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Client library for Azure Key Vault Secrets — secure storage for passwords, API keys, and other secrets.
rust-project
Modern Rust project architecture guide for 2025. Use when creating Rust projects (CLI, web services, libraries). Covers workspace structure, error handling, async patterns, and idiomatic Rust best practices.