azure-functions

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. Use when this capability is needed.

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

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