Stop copy-pasting your CLAUDE.md.
Start assembling it.
Groundrules turns agent instruction files into building blocks — assemble battle-tested rules into AGENTS.md, CLAUDE.md, and system prompts.
Try it now
No signup required. Jump straight into the builder.
Save your progress
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Identity
Conventions
Workflow
Constraints
Seven Block Types
Identity to Examples — the full anatomy of an instruction file.
Drag & Drop
Assemble your config like Lego. No blank file, no gist archaeology.
Every Agent, One File
Export as AGENTS.md or CLAUDE.md — Claude Code, Cursor, Codex, Copilot.
Learn as You Build
Every block explains why it makes your agent behave better.
Optimized for your favorite models
ChatGPT
Claude
Gemini
Copilot