AI Coding Agent Rules Generator — AGENTS.md, CLAUDE.md & .cursorrules

An AI coding agent only follows your project conventions if it can find and read an instructions file — and every agent looks for a different filename in a different place. This tool keeps one shared content model and adapts it to whichever format you pick, so you write your rules once instead of maintaining five near-identical files by hand. There is no AI call and no network request: every byte is produced by string templating in your browser.

One model, five formats. Your inputs — project meta, commands, style rules, conventions and directory notes — become a single internal model. The formats differ only in the filename, the path and one structural quirk. AGENTS.md and CLAUDE.md save at the repository root; .github/copilot-instructions.md lives in the .github folder; Windsurf reads .windsurf/rules/; and Cursor uses .cursor/rules/project.mdc with a small frontmatter block. Wrong placement is the single most common reason an agent ignores your rules, so the exact path is shown in a banner above the output.

Section assembly.Sections are emitted in a fixed order — Project overview → Tech stack → Commands → Code style → Conventions → Directory notes → Commit convention — and any empty section is dropped so the file stays tight. Commands are wrapped in backticks and only the ones you fill in appear; a blank build command simply doesn't show. Each style rule and convention becomes one bullet, and a leading - you type yourself is stripped so you never get a doubled bullet.

Cursor frontmatter. When you target Cursor, the file is prefixed with the documented .mdc frontmatter — description and alwaysApply: true — so the rule applies to every request. No other format gets frontmatter. Leaving the code-style field blank seeds sensible, editable defaults for your chosen language (for example, PEP 8 for Python or strict mode for TypeScript).

Cross-check.The "Structure verified" badge is not decorative. After each keystroke an independent function re-parses the emitted file and confirms a frontmatter block is present only for Cursor, that a single title heading exists, and that every section heading is a recognised one in the canonical order. The filenames, paths and the frontmatter shape come straight from the vendor docs cited below, last verified 2026-07-01.

• AGENTS.md — the open, cross-agent instructions format
• Anthropic — Claude Code memory (CLAUDE.md location and @imports)
• Cursor — Rules (.cursor/rules/*.mdc and legacy .cursorrules)
• GitHub Copilot — repository custom instructions (.github/copilot-instructions.md)
• Windsurf — rules (.windsurf/rules placement)

The filenames, paths and the Cursor frontmatter block on this page were last cross-checked against the vendor docs on 2026-07-01. Each format is a documented specification; this page is reviewed whenever a vendor revises where the file lives or how it is structured.