Domain Web

This kicks in when you're building web services in Rust, whether that's REST APIs, GraphQL endpoints, or WebSocket servers. It covers the domain constraints that matter for web development: why handlers must be async (blocking one task blocks many requests), how to manage shared state with Arc and RwLock, and proper request lifecycle patterns. You get framework comparisons between axum, actix, warp, and rocket, plus the critical patterns like extractors for parsing requests and IntoResponse for unified error handling. The focus is on tracing down from web-specific constraints (stateless HTTP, concurrency, latency SLAs) to concrete Rust implementations. Most useful when you need to understand why web frameworks work the way they do, not just copy-paste handler examples.

skills.sh installs: 3.4K
GitHub stars: 1.6K
last updated: Aug 21, 2026

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Install

$ npx -y skills add actionbook/rust-skills --skill domain-web --agent claude-code

Installs into .claude/skills of the current project.

Files

Web Domain

Layer 3: Domain Constraints

Domain Constraints → Design Implications

Domain Rule	Design Constraint	Rust Implication
Stateless HTTP	No request-local globals	State in extractors
Concurrency	Handle many connections	Async, Send + Sync
Latency SLA	Fast response	Efficient ownership
Security	Input validation	Type-safe extractors
Observability	Request tracing	tracing + tower layers

Critical Constraints

Async by Default

RULE: Web handlers must not block
WHY: Block one task = block many requests
RUST: async/await, spawn_blocking for CPU work

State Management

RULE: Shared state must be thread-safe
WHY: Handlers run on any thread
RUST: Arc<T>, Arc<RwLock<T>> for mutable

Request Lifecycle

RULE: Resources live only for request duration
WHY: Memory management, no leaks
RUST: Extractors, proper ownership

Trace Down ↓

From constraints to design (Layer 2):

"Need shared application state"
    ↓ m07-concurrency: Use Arc for thread-safe sharing
    ↓ m02-resource: Arc<RwLock<T>> for mutable state

SKILL.md on GitHub

Details

Repository: github.com/actionbook/rust-skills
Categories: Backend & APIs, Security, Rust
First seen: May 16, 2026