source-driven-development

Source-Driven Development

Overview

Every framework-specific code decision must be backed by official documentation. Don't implement from memory — verify, cite, and let the user see your sources. Training data goes stale, APIs get deprecated, best practices evolve. In the .NET ecosystem this hits especially hard: EF Core, ASP.NET Core, and Avalonia ship material API changes between major versions, and a pattern that was correct in net6.0 is often deprecated or removed in net8.0. This skill ensures the user gets code they can trust because every pattern traces back to an authoritative source they can check.

When to Use

• The user wants code that follows current best practices for a given framework
• Building boilerplate, starter code, or patterns that will be copied across a solution
• The user explicitly asks for documented, verified, or "correct" implementation
• Implementing features where the framework's recommended approach matters (EF Core queries, ASP.NET Core middleware, Avalonia bindings, Blazor render modes, MAUI lifecycle)
• Reviewing or improving code that uses framework-specific patterns
• Any time you are about to write framework-specific code from memory

When NOT to use:

• Correctness does not depend on a specific version (renaming variables, fixing typos, moving files)
• Pure logic that works the same across all versions (loops, conditionals, System.Collections.Generic)
• The user explicitly wants speed over verification ("just do it quickly")

The Process

DETECT ──→ FETCH ──→ IMPLEMENT ──→ CITE
  │          │           │            │
  ▼          ▼           ▼            ▼
 What       Get the    Follow the   Show your
 stack?     relevant   documented   sources
            docs       patterns

Step 1: Detect Stack and Versions