Improve LLM code quality with an agent.md config file
bibryam · x · 2026-08-27
Fabien Sanglard shares a practice to improve LLM-generated code quality using a custom agent.md file.
- Context: Early LLM attempts produced non-compiling or low-quality spaghetti code, requiring significant cleanup that negated speed gains.
- Evolution: Using agentic IDEs like Antigravity and Claude Code improved quality, but Sanglard found himself repeating the same suggestions (e.g., "avoid magic numbers," "add comments") in every session.
- Solution: He leverages the feature where coding harnesses load an agent.md file from the project root at the start of a session. By codifying all style preferences into this file, he eliminates repetitive prompting.
The post provides his agent.md template, covering rules for comments, function naming, and structure. It also suggests symlinking model-specific files (e.g., claude.md) to this central config for universal application.
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