codex/skills/cloudflare/SKILL.md
Comprehensive Cloudflare platform skill covering Workers, Pages, storage (KV, D1, R2), AI (Workers AI, Vectorize, Agents SDK), feature flags (Flagship), networking (Tunnel, Spectrum), security (WAF, DDoS), and infrastructure-as-code (Terraform, Pulumi). Use for any Cloudflare development task. Biases towards retrieval from Cloudflare docs over pre-trained knowledge.
npx skillsauth add lilpacy/dotfiles cloudflareInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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Consolidated skill for building on the Cloudflare platform. Use decision trees below to find the right product, then load detailed references.
Your knowledge of Cloudflare APIs, types, limits, and pricing may be outdated. Prefer retrieval over pre-training — the references in this skill are starting points, not source of truth.
Fetch the latest information before citing specific numbers, API signatures, or configuration options. Do not rely on baked-in knowledge or these reference files alone.
| Source | How to retrieve | Use for |
|--------|----------------|---------|
| Cloudflare docs | cloudflare-docs search tool or https://developers.cloudflare.com/ | Limits, pricing, API reference, compatibility dates/flags |
| Workers types | npm pack @cloudflare/workers-types or check node_modules | Type signatures, binding shapes, handler types |
| Wrangler config schema | node_modules/wrangler/config-schema.json | Config fields, binding shapes, allowed values |
| Product changelogs | https://developers.cloudflare.com/changelog/ | Recent changes to limits, features, deprecations |
When a reference file and the docs disagree, trust the docs. This is especially important for: numeric limits, pricing tiers, type signatures, and configuration options.
Need feature flags?
└─ Feature toggles, targeting rules, percentage rollouts → flagship/
├─ Evaluate in Workers → Flagship binding (env.FLAGS)
├─ Evaluate in Node.js / browser → OpenFeature SDK (@cloudflare/flagship)
└─ Manage flags via API → Flagship REST API
Need to run code?
├─ Serverless functions at the edge → workers/
├─ Full-stack web app with Git deploys → pages/
├─ Stateful coordination/real-time → durable-objects/
├─ Long-running multi-step jobs → workflows/
├─ Run containers → containers/
├─ Multi-tenant (customers deploy code) → workers-for-platforms/
├─ Scheduled tasks (cron) → cron-triggers/
├─ Lightweight edge logic (modify HTTP) → snippets/
├─ Process Worker execution events (logs/observability) → tail-workers/
└─ Optimize latency to backend infrastructure → smart-placement/
Need storage?
├─ Key-value (config, sessions, cache) → kv/
├─ Relational SQL → d1/ (SQLite) or hyperdrive/ (existing Postgres/MySQL)
├─ Object/file storage (S3-compatible) → r2/
├─ Versioned file trees (repos, build outputs, checkpoints) → artifacts/
├─ Message queue (async processing) → queues/
├─ Vector embeddings (AI/semantic search) → vectorize/
├─ Strongly-consistent per-entity state → durable-objects/ (DO storage)
├─ Secrets management → secrets-store/
├─ Streaming ETL to R2 → pipelines/
└─ Persistent cache (long-term retention) → cache-reserve/
Need AI?
├─ Run inference (LLMs, embeddings, images) → workers-ai/
├─ Vector database for RAG/search → vectorize/
├─ Build stateful AI agents → agents-sdk/
├─ Gateway for any AI provider (caching, routing) → ai-gateway/
└─ AI-powered search widget → ai-search/
Need networking?
├─ Expose local service to internet → tunnel/
├─ TCP/UDP proxy (non-HTTP) → spectrum/
├─ WebRTC TURN server → turn/
├─ Private network connectivity → network-interconnect/
├─ Optimize routing → argo-smart-routing/
├─ Optimize latency to backend (not user) → smart-placement/
└─ Real-time video/audio → realtimekit/ or realtime-sfu/
Need security?
├─ Web Application Firewall → waf/
├─ DDoS protection → ddos/
├─ Bot detection/management → bot-management/
├─ API protection → api-shield/
├─ CAPTCHA alternative → turnstile/
└─ Credential leak detection → waf/ (managed ruleset)
Need media?
├─ Image optimization/transformation → images/
├─ Video streaming/encoding → stream/
├─ Browser automation/screenshots → browser-rendering/
└─ Third-party script management → zaraz/
Need analytics?
├─ Query across all Cloudflare products (HTTP, Workers, DNS, etc.) → graphql-api/
├─ Custom high-cardinality metrics from Workers → analytics-engine/
├─ Client-side (RUM) performance data → web-analytics/
├─ Workers Logs and real-time debugging → observability/
└─ Raw logs (Logpush to external tools) → Cloudflare docs
Need IaC? → pulumi/ (Pulumi), terraform/ (Terraform), or api/ (REST API)
| Product | Reference |
|---------|-----------|
| Flagship | references/flagship/ |
| Product | Reference |
|---------|-----------|
| Workers | references/workers/ |
| Pages | references/pages/ |
| Pages Functions | references/pages-functions/ |
| Durable Objects | references/durable-objects/ |
| Workflows | references/workflows/ |
| Containers | references/containers/ |
| Workers for Platforms | references/workers-for-platforms/ |
| Cron Triggers | references/cron-triggers/ |
| Tail Workers | references/tail-workers/ |
| Snippets | references/snippets/ |
| Smart Placement | references/smart-placement/ |
| Product | Reference |
|---------|-----------|
| KV | references/kv/ |
| D1 | references/d1/ |
| R2 | references/r2/ |
| Artifacts | references/artifacts/ |
| Queues | references/queues/ |
| Hyperdrive | references/hyperdrive/ |
| DO Storage | references/do-storage/ |
| Secrets Store | references/secrets-store/ |
| Pipelines | references/pipelines/ |
| R2 Data Catalog | references/r2-data-catalog/ |
| R2 SQL | references/r2-sql/ |
| Product | Reference |
|---------|-----------|
| Workers AI | references/workers-ai/ |
| Vectorize | references/vectorize/ |
| Agents SDK | references/agents-sdk/ |
| AI Gateway | references/ai-gateway/ |
| AI Search | references/ai-search/ |
| Product | Reference |
|---------|-----------|
| Tunnel | references/tunnel/ |
| Spectrum | references/spectrum/ |
| TURN | references/turn/ |
| Network Interconnect | references/network-interconnect/ |
| Argo Smart Routing | references/argo-smart-routing/ |
| Workers VPC | references/workers-vpc/ |
| Product | Reference |
|---------|-----------|
| WAF | references/waf/ |
| DDoS Protection | references/ddos/ |
| Bot Management | references/bot-management/ |
| API Shield | references/api-shield/ |
| Turnstile | references/turnstile/ |
| Product | Reference |
|---------|-----------|
| Images | references/images/ |
| Stream | references/stream/ |
| Browser Rendering | references/browser-rendering/ |
| Zaraz | references/zaraz/ |
| Product | Reference |
|---------|-----------|
| RealtimeKit | references/realtimekit/ |
| Realtime SFU | references/realtime-sfu/ |
| Product | Reference |
|---------|-----------|
| Wrangler | references/wrangler/ |
| Miniflare | references/miniflare/ |
| C3 | references/c3/ |
| Observability | references/observability/ |
| GraphQL Analytics API | references/graphql-api/ |
| Analytics Engine | references/analytics-engine/ |
| Web Analytics | references/web-analytics/ |
| Sandbox | references/sandbox/ |
| Workerd | references/workerd/ |
| Workers Playground | references/workers-playground/ |
| Product | Reference |
|---------|-----------|
| Pulumi | references/pulumi/ |
| Terraform | references/terraform/ |
| API | references/api/ |
| Product | Reference |
|---------|-----------|
| Email Routing | references/email-routing/ |
| Email Workers | references/email-workers/ |
| Static Assets | references/static-assets/ |
| Bindings | references/bindings/ |
| Cache Reserve | references/cache-reserve/ |
development
Use when searching the web or reading online documentation. Prefer DuckDuckGo for search and read documents through npx curl.md instead of raw HTML.
testing
Use when writing or editing tests. Tests should be ordered by near-normal, normal, then abnormal cases where applicable, and test names must be Japanese behavior descriptions from a reviewer/user perspective.
development
GoF/オブジェクト指向デザインパターンを関数型プログラミング(pure functions, higher-order functions, ADT, composition, immutability, effect boundaries)でシンプルに整理・設計・リファクタリングする。Strategy/Factory/Adapter/ObserverなどGoF全23パターンのFP置き換え、適用判断、具体事例を提示する必要があるときに使う。
tools
Use when committing, pushing, or preparing PRs. Defines the user's commit workflow, message style discovery, review handoff, and branch/worktree push requirements.