# How Fabien Sanglard actually uses coding agents

Game Engine Black Books

**If you take one thing:** `"Reload agent.md"`, when code quality drops. a one-line fix for context dilution, sent the moment the agent's style slips.

- **Agent:** Claude Code (ide) ([source, 2026-08-21](https://fabiensanglard.net/agent.md/index.html))
- **Agent:** Antigravity (ide) ([source, 2026-08-21](https://fabiensanglard.net/agent.md/index.html))
- **Review:** Reads all the code; LLM criticizes first ([source, 2026-08-21](https://fabiensanglard.net/agent.md/index.html))
- **Harness:** Agentic IDE, a fresh session per feature ([source, 2026-08-21](https://fabiensanglard.net/agent.md/index.html))
- **Rules file:** agent.md, gemini.md/claude.md symlinked to it ([source, 2026-08-21](https://fabiensanglard.net/agent.md/index.html))

## In their words

> In March 2026, I tried to use agentic IDEs like Antigravity and VS Code's Claude Code plugin.

> In March 2026, I tried to use agentic IDEs like Antigravity and VS Code's Claude Code plugin.

> While this "trick" has considerably improved the code generated, this is not a magic bullet that lets me avoid reading the code.

> Keep the context short. This means starting a new session per feature.

> Avoid superlatives and praise. Stop telling me I am absolutely right. Give me the cold hard truth.


Archetype (our label): Rules Lawyer. Newest source: 2026-08-21.
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