Every AI contributor.
Your coding standards.
Stop reviewing PRs that violate your conventions. Commit ChooChoo context files to your repo and every contributor's AI agent reads your standards automatically — no setup required.
AI contributors don't know your project.
Without structured context, every AI assistant starts blank — rediscovering your architecture, ignoring your conventions, and generating code that fails your review standards.
Conventions Stay Invisible
Your CONTRIBUTING.md gets read once, if ever. AI assistants don't inherit your project's standards unless you encode them — every session, every contributor, every agent.
Review Cycles Multiply
AI-generated PRs that miss your patterns mean more rounds, more inline comments, and maintainer time spent teaching instead of merging.
Drift Compounds Silently
Different contributors, different AI assistants, different outputs. Without a shared context layer the codebase fragments even as velocity increases.
One commit. Every contributor on the same page.
Commit ChooChoo context files once. Every contributor's AI reads them automatically — before writing a single line.
Fewer Failed Reviews
Context files front-load your conventions. Contributions arrive closer to mergeable — less back-and-forth, faster time to merge.
Consistent Across All Contributors
One source of truth for AI coding standards. No per-contributor drift between what different assistants generate across your contributor base.
Guardrails by Default
Security constraints and architectural decisions are encoded once and respected across every session, every contributor, every agent in your stack.
Three steps to fix AI contribution quality.
Works with Claude, Cursor, Codex, Copilot, Gemini, and OpenCode. No per-contributor configuration needed.
Generate
Run `choochoo context generate`. ChooChoo scans your codebase and compiles AGENTS.md, CLAUDE.md, and per-agent rules files — all in under two seconds.
Commit
Add the context files to your repo. They're plain Markdown — version-controlled, diffable, and reviewable like any other source file.
Ship
Every contributor's AI reads the files at session start. No per-contributor setup, no manual syncing. Standards enforced from the first keystroke.
Free for qualifying open source projects.
We believe open source deserves the same context tooling as enterprise teams. No usage limits, no expiry, no credit card required.
Eligibility
Get started with ChooChoo OSS.
Tell us about your project. We review every application personally and respond within a few days.