Cloudflare Worker Base Stack

Status: ✅ Production Ready Last Updated: 2026-01-03 Production Example: https://cloudflare-worker-base-test.webfonts.workers.dev

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What This Skill Does

Sets up production-ready Cloudflare Workers projects with:

• Hono v4.11.3 for routing
• @cloudflare/vite-plugin v1.17.1 for development
• Wrangler v4.54.0 with auto-provisioning
• Workers Static Assets for frontend files
• Workers RPC for service-to-service calls
• ES Module format (correct export pattern)
• wrangler.jsonc configuration (preferred over .toml)

Prevents 8 documented issues that commonly break Workers projects.

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Auto-Trigger Keywords

Claude automatically uses this skill when you mention:

Technologies

• Cloudflare Workers
• CF Workers
• Hono
• Wrangler
• Workers Static Assets
• @cloudflare/vite-plugin
• wrangler.jsonc
• ES Module Worker
• Serverless Cloudflare
• Edge computing
• Workers RPC
• WorkerEntrypoint
• Service bindings
• Auto-provisioning

Use Cases

• Create Cloudflare Worker
• Set up Hono routing
• Configure Vite for Workers
• Add Static Assets to Worker
• Deploy with Wrangler
• Initialize Workers project
• Scaffold CF Worker
• Workers with frontend
• Call Worker from Worker
• Split Worker into microservices
• Auto-provision D1/R2/KV bindings

Common Errors (Triggers Prevention)

• "Cannot read properties of undefined"
• "Static Assets 404"
• "A hanging Promise was canceled"
• "Handler does not export"
• API routes return HTML instead of JSON
• SPA fallback intercepts API
• Deployment fails non-deterministically
• HMR crashes during development
• Routing not working
• Build fails with Vite
• 404 for fingerprinted assets during gradual rollout
• 429 errors with run_worker_first on free tier

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Known Issues Prevented

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Quick Start

# 1. Scaffold project
npm create cloudflare@latest my-worker -- --type hello-world --ts --git --deploy false --framework none

# 2. Install dependencies
cd my-worker
npm install hono@4.11.3
npm install -D @cloudflare/vite-plugin@1.17.1 vite@7.2.4

# 3. Configure (see SKILL.md for full setup)

# 4. Dev & Deploy
npm run dev
npm run deploy

Full instructions: See SKILL.md

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Token Savings Estimate

Without this skill: ~8,000 tokens (documentation lookups + trial-and-error fixing errors) With this skill: ~3,000 tokens (direct implementation with correct patterns)

Savings: ~60% token reduction + prevents all 8 documented errors on first attempt

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Included Agents

This skill includes 4 companion agents for common workflows:

To install all agents:

cp ~/.claude/skills/cloudflare-worker-base/agents/*.md ~/.claude/agents/

Why use agents? Context hygiene. Each agent runs in isolated context—verbose build logs, migration outputs, and debug traces don't bloat your main conversation. You get a clean summary instead of 500+ lines of tool output.

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File Structure

cloudflare-worker-base/
├── SKILL.md                    # Full instructions (read this first)
├── README.md                   # This file
├── agents/                     # Companion agents
│   ├── cloudflare-deploy.md    # Build → deploy → verify
│   ├── d1-migration.md         # Local → test → remote migrations
│   ├── cloudflare-debug.md     # Diagnose worker issues
│   └── worker-scaffold.md      # Create new projects
├── templates/                  # Copy-ready files
│   ├── wrangler.jsonc          # Worker configuration
│   ├── vite.config.ts          # Vite + plugin setup
│   ├── package.json            # Dependencies
│   ├── tsconfig.json           # TypeScript config
│   ├── src/
│   │   └── index.ts            # Hono app with API routes
│   └── public/                 # Static assets example
│       ├── index.html
│       ├── styles.css
│       └── script.js
└── reference/                  # Deep-dive docs
    ├── architecture.md         # Export patterns, routing, Static Assets
    ├── common-issues.md        # All 6 issues with troubleshooting
    └── deployment.md           # Wrangler, CI/CD, production tips

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Package Versions (Verified 2026-01-03)

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When to Use This Skill

✅ Use this skill when:

• Creating a new Cloudflare Workers project
• Adding Vite to an existing Worker
• Setting up Hono routing
• Configuring Static Assets with Workers
• Encountering any of the 8 documented errors
• Need production-ready Worker template
• Want to avoid common Workers pitfalls
• Setting up Workers RPC / service bindings
• Want auto-provisioned D1/R2/KV bindings

❌ Don't use this skill for:

• Cloudflare Pages projects (use Workers with Static Assets instead)
• Adding D1/KV/R2 bindings (covered in separate cloudflare-services skill)
• Authentication setup (covered in clerk-auth skill)
• React/Vue framework setup (those have dedicated skills)

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Official Documentation

• Cloudflare Workers: https://developers.cloudflare.com/workers/
• Static Assets: https://developers.cloudflare.com/workers/static-assets/
• Vite Plugin: https://developers.cloudflare.com/workers/vite-plugin/
• Hono: https://hono.dev/docs/getting-started/cloudflare-workers
• Wrangler Configuration: https://developers.cloudflare.com/workers/wrangler/configuration/

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Research Validation

• ✅ All packages verified on npm (2026-01-03)
• ✅ All 8 issues have documented sources
• ✅ Working example deployed: https://cloudflare-worker-base-test.webfonts.workers.dev
• ✅ Build time: ~45 minutes (0 errors)
• ✅ Research log: /home/jez/Documents/claude-skills/planning/research-logs/cloudflare-worker-base.md

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Next Steps After Using This Skill

1. Add Database: Use cloudflare-services skill to add D1/KV/R2
2. Add Authentication: Use clerk-auth skill for user management
3. Add Frontend Framework: Use vite-react or vite-vue skills
4. Set up CI/CD: See reference/deployment.md for GitHub Actions examples

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Production Tested: ✅ Error Rate: 0 Build Success Rate: 100% Token Efficiency: ~60% savings

Ready to use! Start with SKILL.md for full setup instructions.