Eight days after publishing a guide to tuning Claude Code, a single week of releases — Claude Fable 5, a one-flag safe mode, Stop hooks that talk back, and guardrails that used to be your job — forced a re-tune. Here’s the delta, mapped onto the same layers, and what we changed in our .NET codebase.
Out of the box, Claude Code treats every repository the same. The difference between autocomplete and a coworker is configuration: layered memory, deterministic hooks, skills, MCP servers, and worktrees. Here’s how to build each layer — and how we applied it to a large .NET codebase.
No new model. Five orchestration features. And a roomful of engineers raising their hands when asked who had shipped a pull request that week written entirely by AI.
Event sourcing has always been a tough sell — powerful, but too much work for most teams. AI coding assistants change the cost side of that equation.
OpenTelemetry auto-instrumentation gets you started, but business operations stay invisible. Claude Code helps you add custom spans, choose useful attributes, and configure sampling that survives production.
The Aspire dashboard exposes runtime data through an MCP server. Claude Code can query the running Aspire app directly — logs, traces, and resource state — so you stop tab-switching and copying stack traces into chat.
The .NET Aspire AppHost makes your distributed application topology visible in code. That’s exactly the context Claude Code needs to be useful — from wiring new services to debugging startup failures.
What does it actually look like to build a real feature with Claude Code? Not a toy example — a complete ASP.NET Core feature from ticket to PR. Here’s the full walkthrough.
Claude Code can spot performance issues that are easy to miss — N+1 queries, unnecessary allocations, blocking async calls, inefficient LINQ. Here’s how to use it as your performance reviewer.
Claude Code can scan your .NET codebase for security vulnerabilities — SQL injection, XSS, broken auth, insecure deserialization. Here’s how to use it as your first-pass security reviewer.