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tomevault-io (@tomevault-io) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Rust Ecosystem by tomevault-io — Agent Skill

Name: Rust Ecosystem
Author: tomevault-io

Rust Ecosystem

This skill should be used when working with Rust projects, "Cargo.toml", "rustc", "cargo build/test/run", "clippy", "rustfmt", or Rust language patterns. Provides comprehensive Rust ecosystem patterns and best practices. Use when this capability is needed.

tomevault-io Updated Sep 17, 2026

File contents

[dependencies] serde = { version = "1.0", features = ["derive"] }

[dev-dependencies] tokio-test = "0.4"

[build-dependencies] cc = "1.0"

[profile.dev] opt-level = 0 debug = true

[workspace.package] version = "0.1.0" edition = "2021" license = "MIT"

[workspace.dependencies] serde = "1.0" tokio = { version = "1", features = ["full"] }

[dependencies] serde.workspace = true

Or in clippy.toml

msrv = "1.70" cognitive-complexity-threshold = 25

Converted and distributed by TomeVault — claim your Tome and manage your conversions.

---name: rust-ecosystemdescription: This skill should be used when working with Rust projects, "Cargo.toml", "rustc", "cargo build/test/run", "clippy", "rustfmt", or Rust language patterns. Provides comprehensive Rust ecosystem patterns and best practices. Use when this capability is needed.---<purpose>Provide comprehensive patterns for Rust language, Cargo project management, and toolchain configuration.</purpose><rust_language><ownership_borrowing><concept name="ownership"><description>Each value has exactly one owner. When owner goes out of scope, value is dropped.</description><use>Use move semantics by default; explicit Clone when needed</use></concept><concept name="borrowing"><description>Immutable and mutable references with strict rules</description><rules priority="critical"><rule>&T allows multiple simultaneous borrows</rule><rule>&mut T allows exactly one mutable borrow</rule><rule>Cannot have &mut T while &T exists</rule></rules></concept><concept name="lifetimes"><description>Lifetime annotations for reference validity</description><pattern name="elision"><description>Compiler infers lifetimes in common patterns</description></pattern><pattern name="explicit"><description>Explicit lifetime annotations for complex cases</description><example>fn foo<'a>(x: &'a str) -> &'a str { x}</example></pattern><pattern name="static"><description>'static for values that live entire program</description></pattern></concept></ownership_borrowing><traits><common_traits><trait name="Clone">Explicit duplication with .clone()</trait><trait name="Copy">Implicit bitwise copy for simple types</trait><trait name="Debug">Debug formatting with {:?}</trait><trait name="Display">User-facing formatting with {}</trait><trait name="Default">Default value construction</trait><trait name="PartialEq/Eq">Equality comparison</trait><trait name="PartialOrd/Ord">Ordering comparison</trait><trait name="Hash">Hashing for HashMap/HashSet keys</trait><trait name="From/Into">Type conversions</trait><trait name="AsRef/AsMut">Cheap reference conversions</trait></common_traits><pattern name="derive"><description>Automatically implement common traits</description><example>#[derive(Debug, Clone, PartialEq, Eq, Hash)]struct MyType { field1: String, field2: i32,}</example></pattern></traits><error_handling><pattern name="Result"><description>Recoverable errors with Result with T and E type parameters</description><operators>? for early return on Err</operators><combinators>map, and_then, unwrap_or, unwrap_or_else</combinators></pattern><pattern name="Option"><description>Optional values with Option with T type parameter</description><operators>? for early return on None</operators><combinators>map, and_then, unwrap_or, unwrap_or_default</combinators></pattern><pattern name="custom_error"><description>Define custom error types with thiserror or anyhow</description><example>#[derive(Debug, thiserror::Error)]enum MyError { #[error("IO error: {0}")] Io(#[from] std::io::Error), #[error("Parse error: {msg}")] Parse { msg: String },}</example></pattern></error_handling><common_patterns><pattern name="builder"><description>Fluent API for complex object construction</description><example>MyStruct::builder().field1(value1).field2(value2).build()</example></pattern><pattern name="newtype"><description>Wrapper type for type safety</description><example>struct UserId(u64);</example></pattern><pattern name="type_state"><description>Encode state in type system</description><use_case>Prevent invalid state transitions at compile time</use_case></pattern></common_patterns><anti_patterns><avoid name="unwrap_in_library"><description>Using unwrap() in library code</description><instead>Use ? or proper error handling instead</instead></avoid><avoid name="clone_abuse"><description>Cloning values unnecessarily</description><instead>Prefer borrowing when possible</instead></avoid><avoid name="string_for_everything"><description>Using String for all domain values</description><instead>Use enums, newtypes for domain modeling</instead></avoid><avoid name="arc_mutex_overuse"><description>Defaulting to Arc with Mutex with T for concurrency</description><instead>Consider channels or ownership patterns first</instead></avoid></anti_patterns></rust_language><cargo><project_structure><standard_layout>.├── Cargo.lock├── Cargo.toml├── src/│ ├── lib.rs # Library crate root│ ├── main.rs # Binary crate root│ └── bin/ # Additional binaries├── tests/ # Integration tests├── benches/ # Benchmarks└── examples/ # Example code</standard_layout><module_organization><pattern name="mod_rs"><description>src/module/mod.rs with submodules</description></pattern><pattern name="file_module"><description>src/module.rs (preferred for simple modules)</description></pattern></module_organization></project_structure><cargo_toml><basic_structure>[package]name = "my-crate"version = "0.1.0"edition = "2021" # Current edition; edition 2024 (upcoming/future)rust-version = "1.83" # Current stable as of Dec 2025[dependencies]serde = { version = "1.0", features = ["derive"] }[dev-dependencies]tokio-test = "0.4"[build-dependencies]cc = "1.0"</basic_structure><feature_flags>[features]default = ["std"]std = []async = ["tokio"]full = ["std", "async"]</feature_flags><profile_optimization>[profile.release]lto = truecodegen-units = 1panic = "abort"strip = true[profile.dev]opt-level = 0debug = true</profile_optimization></cargo_toml><workspace><root_cargo_toml>[workspace]resolver = "2" # Current default for edition 2021; resolver 3 (upcoming, requires Edition 2024)members = ["crate-a", "crate-b"][workspace.package]version = "0.1.0"edition = "2021"license = "MIT"[workspace.dependencies]serde = "1.0"tokio = { version = "1", features = ["full"] }</root_cargo_toml><member_inheritance>[package]name = "crate-a"version.workspace = trueedition.workspace = true[dependencies]serde.workspace = true</member_inheritance></workspace><commands><command name="cargo build">Compile the project</command><command name="cargo build --release">Compile with optimizations</command><command name="cargo run">Build and run binary</command><command name="cargo test">Run all tests</command><command name="cargo check">Fast syntax/type check without codegen</command><command name="cargo doc --open">Generate and open documentation</command><command name="cargo update">Update dependencies</command><command name="cargo tree">Display dependency tree</command></commands></cargo><toolchain><clippy><description>Rust linter for catching common mistakes and improving code</description><usage>cargo clippy -- -D warnings</usage><configuration><file_reference>In Cargo.toml</file_reference>[lints.clippy]pedantic = "warn"nursery = "warn"unwrap_used = "deny"expect_used = "deny"<file_reference>Or in clippy.toml</file_reference>msrv = "1.70"cognitive-complexity-threshold = 25</configuration><common_lints><lint name="clippy::unwrap_used">Prefer ? or proper error handling</lint><lint name="clippy::expect_used">Prefer ? or proper error handling</lint><lint name="clippy::pedantic">Stricter lints for cleaner code</lint><lint name="clippy::nursery">Experimental but useful lints</lint></common_lints></clippy><rustfmt><description>Automatic code formatter</description><usage>cargo fmt</usage><configuration><file_reference>rustfmt.toml</file_reference>edition = "2021"max_width = 100use_small_heuristics = "Max"imports_granularity = "Crate"group_imports = "StdExternalCrate"reorder_imports = true</configuration></rustfmt><cargo_nextest><description>Next-generation test runner with better output and parallelism</description><usage>cargo nextest run</usage><features><feature>Parallel test execution</feature><feature>Better failure output</feature><feature>JUnit XML output for CI</feature><feature>Test retries</feature></features><configuration><file_reference>.config/nextest.toml</file_reference>[profile.default]retries = 2slow-timeout = { period = "60s", terminate-after = 2 }fail-fast = false</configuration></cargo_nextest><other_tools><tool name="cargo-audit"><description>Security vulnerability scanning</description></tool><tool name="cargo-deny"><description>Dependency license and security checks</description></tool><tool name="cargo-outdated"><description>Check for outdated dependencies</description></tool><tool name="cargo-watch"><description>Auto-rebuild on file changes</description></tool><tool name="cargo-expand"><description>Macro expansion debugging</description></tool></other_tools></toolchain><context7_integration><description>Use Context7 MCP for up-to-date Rust documentation</description><rust_libraries><library name="The Rust Book" id="/rust-lang/book" /><library name="Cargo" id="/rust-lang/cargo.git" /><library name="Rust Clippy" id="/rust-lang/rust-clippy" /><library name="Rustfmt" id="/rust-lang/rustfmt" /><library name="Rust Reference" id="/rust-lang/reference.git" /><library name="Rust by Example" id="/rust-lang/rust-by-example.git" /><library name="cargo-nextest" id="/websites/nexte_st" /></rust_libraries><usage_patterns><pattern name="language_reference"><step>resolve-library-id libraryName="rust lang"</step><step>get-library-docs context7CompatibleLibraryID="/rust-lang/book" topic="ownership"</step></pattern><pattern name="cargo_configuration"><step>get-library-docs context7CompatibleLibraryID="/rust-lang/cargo.git" topic="workspace"</step></pattern><pattern name="clippy_lints"><step>get-library-docs context7CompatibleLibraryID="/rust-lang/rust-clippy" topic="lints configuration"</step></pattern></usage_patterns></context7_integration><best_practices><practice priority="critical">Use cargo check for fast iteration during development</practice><practice priority="critical">Run cargo clippy before committing</practice><practice priority="critical">Format with cargo fmt for consistent style</practice><practice priority="high">Use workspace for multi-crate projects</practice><practice priority="high">Prefer &str over String for function parameters</practice><practice priority="high">Use impl Trait for return types when possible</practice><practice priority="medium">Document public API with /// doc comments</practice><practice priority="medium">Write unit tests alongside code in same file</practice><practice priority="medium">Use integration tests in tests/ for API testing</practice><practice priority="medium">Set rust-version in Cargo.toml for MSRV</practice></best_practices>---> Converted and distributed by [TomeVault](https://tomevault.io/claim/mtaku3) — claim your Tome and manage your conversions.

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