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Rust development conventions covering domain modeling, error handling, API design, testing, performance, and type-level programming. Load when working with .rs files or Rust projects.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
Index curated reference corpora into a searchable knowledge graph via the cognee engine, then query it to ground technical writing, review, and analysis. Use when ingesting reference documents into named datasets or retrieving grounding context for tasks like drafting or reviewing a manuscript. A reference-knowledge index, explicitly not agent session memory.
Nix development conventions for flakes, derivations, modules, and code style. Use when authoring flake.nix files, writing derivations or builders, designing NixOS/nix-darwin/home-manager modules, or following nix formatting and naming conventions. For check architecture and CI integration, see preferences-nix-checks-architecture and preferences-nix-ci-cd-integration.
Approximately-verifiable, refinement-driven development for type-driven domain-driven design. Use when modeling a domain as a dependently-typed Lean 4 specification, refining/lowering it to a Rust implementation, lifting the implementation back via Charon and Aeneas to check spec<->implementation correspondence (translation validation) — mechanically when tractable, otherwise via differential testing or LLM comparison — or when generating and diffing type-system diagrams of the model and implementation to track their evolution. Mechanical on-the-nose proof is the precise ideal, not a requirement; its absence is not a failure of the method.
Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Claude's capabilities with specialized knowledge, workflows, or tool integrations.
Algebraic data type patterns including sum types, product types, and pattern matching across languages. Load when designing type hierarchies or working with discriminated unions.
Algebraic laws including functor/monad laws and property-based testing strategies. Load when verifying algebraic properties or writing property tests.
| name | preferences-rust-development |
| description | Rust development conventions covering domain modeling, error handling, API design, testing, performance, and type-level programming. Load when working with .rs files or Rust projects. |
This guide integrates functional domain modeling (FDM) with pragmatic Rust practices from Microsoft engineers.
Primary lens: Functional domain modeling - type-driven design encoding business logic in the type system, making invariants explicit and violations compile-time errors.
Complementary guidance: Microsoft Pragmatic Rust Guidelines - industry best practices for API design, testing, performance, and safety.
Philosophical reconciliations:
Role in multi-language architectures: Rust often serves as the base IO/Result layer discharging the lowest capability interface in a multi-language architecture, providing memory-safe, high-performance foundations for effect composition. A transformer stack is only one (leaky) interpreter of such an interface, never the interface itself; see preferences-theoretical-foundations, its effects-handlers reference, for why a capability interface discharged by handlers, not a transformer tower, is the primitive.
This guide is organized into focused topic files for easy navigation and AI agent efficiency.
| File | Description |
|---|---|
| 01-functional-domain-modeling.md | Core FDM patterns: smart constructors, state machines, workflows, aggregates, error classification; advanced patterns: phantom types, const generics, NonEmpty collections; Pattern 6: The Decider pattern (fmodel-rust) for event-sourced command handling |
| 02-error-handling.md | Canonical error structs, thiserror/anyhow/miette, Result composition, railway-oriented programming, applicative validation, #[must_use] enforcement |
| 03-panic-semantics.md | When to panic vs return Result, programming bugs vs domain errors |
| 04-api-design.md | Naming, dependency injection hierarchy, builders, sans-io pattern, serialization boundaries, command/event struct patterns |
| 05-testing.md | Mockable I/O, property-based testing, feature-gated test utilities |
| 06-documentation.md | Canonical doc sections, module docs, doc tests |
| 07-performance.md | Hot paths, throughput optimization, async yield points, allocators |
| 08-structured-logging.md | Tracing, message templates, OpenTelemetry conventions |
| 09-unsafe-code.md | Validation requirements, Miri testing, soundness guarantees |
| 10-tooling.md | Code quality, linting, dependency management |
| 11-concurrency.md | Capability-secure concurrency: deny capabilities, actor patterns, channel primitives, structured concurrency |
| 12-distributed-systems.md | Distributed patterns: idempotency keys, saga orchestration, transactional outbox, event sourcing integration |
| 13-type-level-programming.md | Strategic library extensions: typenum, frunk, nutype for type-level programming; compile-time assertions; anti-patterns to avoid |
This document integrates guidance from:
~/.claude/skills/preferences-domain-modeling/SKILL.md for universal patterns, ~/.claude/skills/preferences-architectural-patterns/SKILL.md for application structure, ~/.claude/skills/preferences-railway-oriented-programming/SKILL.md for error composition~/.claude/skills/preferences-distributed-systems/SKILL.md - universal distributed systems decision framework~/.claude/skills/preferences-algebraic-data-types/SKILL.md - sum/product type patterns