rust-toolchain-baseline

Rules for keeping Rust project configuration compatible with the required Rust compiler and Cargo versions.

In plain words
What is it for?
It guides dependency and build-setting updates, then requires checks such as cargo check and Clippy, Rust's code-linting tool.
Why use it?
It reduces configuration changes that could break builds, checks, or continuous integration.

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-toolchain-baseline
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 212 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 $0.00212
Opus 5 $0.00000 $0.00106
Sonnet 5 $0.00000 $0.00042
Haiku 4.5 $0.00000 $0.00021

Measured 2d ago against content hash 49559eee9e4d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

rust-toolchain-baseline 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 2d 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.

.cursor/rules/rust-toolchain-baseline.mdc · 25 lines

What it actually says

Rust Toolchain Baseline

  • For dependency, feature, or build config edits, preserve compatibility with installed baseline:
    • rustc 1.92.0
    • cargo 1.92.0
    • target profile from rust-toolchain.toml and .cargo/config.toml

Required validation when changing project config

  • If Cargo.toml, Cargo.lock, rust-toolchain.toml, or .cargo/config.toml is updated:
    • verify cargo check
    • verify cargo clippy --all-features -- -D warnings when practical
    • document important toolchain impacts in docs/development/

Dependency hygiene

  • Prefer latest compatible crates unless project policy pins a version.
  • Remove unused dependencies/features after updates to keep CI stable and faster.
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. 2d ago First seen · 25 lines · 0 tokens per session scan A 49559eee9e4d

Subscribe to this mod's changes

rust-toolchain-baseline is a cursor rule published in the GitHub repository platinoff/poolAI (4 stars, last pushed 9d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 212 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.