rust

Project rules for writing Rust 2021 code, including conventions for errors, asynchronous work, testing and feature flags. They also define common Cargo commands and a Rust-only runtime policy, with JavaScript allowed in src/ui/.

In plain words
What is it for?
Use them when adding or reviewing Rust code, running checks and tests, formatting, linting, generating documentation, or working with features such as enterprise, JWT and HTTPS.
Why use it?
They give coding agents a consistent set of project constraints and checks, reducing incompatible code and missed validation steps.

Cursor rule for Cursor

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 rules/platinoff/poolai/rust
Clone the repo
git clone --depth 1 https://github.com/platinoff/poolAI

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 1,050 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 $0.00000 $0.01050
Opus 5 $0.00000 $0.00525
Sonnet 5 $0.00000 $0.00210
Haiku 4.5 $0.00000 $0.00105

Measured yesterday against content hash 131a097667d2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

rust 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 yesterday.

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.

.cursor/rules/rust.mdc · 101 lines

How it starts

The opening of the file, as written. The whole thing — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Rust Project Rules

Stack policy: PoolAI product code is Rust-only (plus src/ui/ JS). Do not add Python runtime, requirements.txt, or Python sidecars. See .cursor/rules/runtime-stack-policy.mdc.

Commands

  • cargo check: Check code compilation without building
  • cargo build: Build the project
  • cargo build --release: Build optimized release version
  • cargo test: Run all tests (prefer single test files for speed: cargo test --test <test_file>)
  • cargo fmt: Format code (always run before commit)
  • cargo clippy: Run linter (always run before commit)
  • cargo doc --open: Generate and open documentation
  • cargo run: Run the main binary
  • cargo run --features enterprise: Run with enterprise features
  • cargo run --features jwt: Run with JWT authentication
  • cargo run --features https: Run with HTTPS support

Code Style

  • Use Rust Edition 2021 conventions
  • Follow Rust naming conventions: snake_case for functions/variables, PascalCase for types
  • Use pub only when necessary - prefer private by default
  • Use Arc<RwLock<T>> for shared mutable state across async tasks
  • Use Option<T> and Result<T, E> for error handling - never use unwrap() in production code
  • Use async/await for I/O operations, prefer tokio runtime
  • Use tracing for logging: info!(), warn!(), error!(), debug!()
  • See src/core/error.rs for canonical error handling patterns
  • See src/raid/mod.rs for canonical module structure with mod.rs

Module Structure

  • Each module has a mod.rs file
  • Sub-modules in separate files (e.g., src/raid/burst_raid.rs)
  • Public API exported through pub use in mod.rs
  • Private implementation details stay in sub-modules
  • See src/lib.rs for public API structure

Error Handling

  • Use AppError from crate::core::error::AppError
  • Always provide context and suggestions in error messages
  • Use ? operator for error propagation
  • Never use unwrap() or expect() in production code
  • Use Result<T, AppError> for fallible operations

Read the full file on GitHub · 101 lines

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. yesterday First seen · 101 lines · 0 tokens per session scan A 131a097667d2

Subscribe to this mod's changes

rust is a cursor rule published in the GitHub repository platinoff/poolAI (4 stars, last pushed 8d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,050 tokens. 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 2026-08-31.