A set of development guidance for web services, which are programs that receive and respond to requests over the internet. It covers HTTP APIs, real-time connections, authentication, routing, and shared application state.

Use it when building REST or GraphQL APIs, WebSocket services, request handlers, middleware, authentication, authorization, rate limits, or CORS rules.

Web servers must handle many requests safely and quickly while validating input and protecting access. The guidance helps avoid blocking requests, unsafe state sharing, and missing security checks.

How moeru-ai/auv configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to moeru-ai/auv. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/moeru-ai/auv/main/.agents/skills/domain-web/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/moeru-ai/auv

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/moeru-ai/auv/domain-web/github.svg)](https://agentmods.dev/skills/moeru-ai/auv/domain-web)

Your own site

<a href="https://agentmods.dev/skills/moeru-ai/auv/domain-web"><img src="https://agentmods.dev/badge/skills/moeru-ai/auv/domain-web/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/moeru-ai/auv/domain-web"><img src="https://agentmods.dev/badge/skills/moeru-ai/auv/domain-web.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 87 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,004 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

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.

Model	Per session	Once invoked
Fable 5.1	$0.00087	$0.01004
Opus 5.5	$0.00035	$0.00402
Sonnet 5.5	$0.00017	$0.00201
Haiku 4.5	$0.00009	$0.00100

Measured 2mo ago against content hash a7e6625d4ee7, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

domain-web 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 2mo 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.

.agents/skills/domain-web/SKILL.md · 157 lines

How it starts

The opening of the file, as written. The whole thing — 157 lines — stays where its author put it; the contents beside it link to each section on GitHub.

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

"Need request validation"
    ↓ m05-type-driven: Validated extractors
    ↓ m06-error-handling: IntoResponse for errors

"Need middleware stack"
    ↓ m12-lifecycle: Tower layers
    ↓ m04-zero-cost: Trait-based composition

Framework Comparison

Framework	Style	Best For
axum	Functional, tower	Modern APIs
actix-web	Actor-based	High performance
warp	Filter composition	Composable APIs
rocket	Macro-driven	Rapid development

Key Crates

Purpose	Crate
HTTP server	axum, actix-web
HTTP client	reqwest
JSON	serde_json
Auth/JWT	jsonwebtoken
Session	tower-sessions
Database	sqlx, diesel
Middleware	tower

Design Patterns

Pattern	Purpose	Implementation
Extractors	Request parsing	`State(db)`, `Json(payload)`
Error response	Unified errors	`impl IntoResponse`
Middleware	Cross-cutting	Tower layers
Shared state	App config	`Arc<AppState>`

Read the full file on GitHub · 157 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.

2mo ago First seen · 157 lines · 87 tokens per session scan A a7e6625d4ee7

Subscribe to this mod's changes

domain-web is a skill published in the GitHub repository moeru-ai/auv (203 stars, last pushed 2d ago), licensed Apache-2.0. It adds 87 tokens to every session and 1,004 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-08-30.

Backend and APIs agent-desktop computer-use cua gui-automation os-automation phone-use

domain-web next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
domain-webmoeru-ai/auv	Skill	203	2d ago	Apache-2.0	A	87	Claude Code
telegramrazzant/ouroboros	Skill	1.6k	today	MIT	A	19	Claude Code
computer-use-safetyellmos-ai/skills	Skill	9	3d ago	MIT	A	186	Claude Code, Codex
open-compute-bridgeellmos-ai/skills	Skill	9	3d ago	MIT	B	149	Claude Code, Codex
oswrightAsk-812/oswright	Skill	4	21d ago	MIT	A	97	Claude Code, Codex
axstreammilind-soni/axstream	Skill	20	2mo ago	MIT	A	96	Claude Code
computer-useedosulai/silenthand-cua	Skill	0	2mo ago	MIT	A	37	Claude Code, Codex

auv: Skill for Claude Code