Expert patterns for Azure Functions development including isolated worker model, Durable Functions orchestration, cold start optimization, and production patterns. Covers .NET, Python, and Node.js programming models. Use when: azure function, azure functions, durable functions, azure serverless, function app.
Install with the open skills CLI (global, non-interactive — available in every Claude Code session):
npx skills add davila7/claude-code-templates --skill "azure-functions" -g -a claude-code -yOr manually — copy the SKILL.md below into:
~/.claude/skills/azure-functions-davila7/SKILL.md---
name: azure-functions
description: "Expert patterns for Azure Functions development including isolated worker model, Durable Functions orchestration, cold start optimization, and production patterns. Covers .NET, Python, and Node.js programming models. Use when: azure function, azure functions, durable functions, azure serverless, function app."
source: vibeship-spawner-skills (Apache 2.0)
---
# Azure Functions
## Patterns
### Isolated Worker Model (.NET)
Modern .NET execution model with process isolation
### Node.js v4 Programming Model
Modern code-centric approach for TypeScript/JavaScript
### Python v2 Programming Model
Decorator-based approach for Python functions
## Anti-Patterns
### ❌ Blocking Async Calls
### ❌ New HttpClient Per Request
### ❌ In-Process Model for New Projects
## ⚠️ Sharp Edges
| Issue | Severity | Solution |
|-------|----------|----------|
| Issue | high | ## Use async pattern with Durable Functions |
| Issue | high | ## Use IHttpClientFactory (Recommended) |
| Issue | high | ## Always use async/await |
| Issue | medium | ## Configure maximum timeout (Consumption) |
| Issue | high | ## Use isolated worker for new projects |
| Issue | medium | ## Configure Application Insights properly |
| Issue | medium | ## Check extension bundle (most common) |
| Issue | medium | ## Add warmup trigger to initialize your code |