# Migrate from Greptile to Rush

.greptile/rules.md is plain markdown and moves into AGENTS.md as it is; files.json references become links in it; config.json settings become prose.

Facts checked 17 October 2026. Prices and limits move. Read the citations.

## Where Rush sits

Greptile's rules are already plain markdown, so moving review to Rush is mostly copying .greptile/rules.md into AGENTS.md and adding one automation.

## The steps

1. Copy .greptile/rules.md into AGENTS.md, link the files files.json pointed at, and write config.json settings as rules.
2. Add a Rush automation with a GitHub pull_request.opened trigger and a review prompt that asks the agent to run the relevant tests.
3. Run both on a few pull requests, then uninstall the Greptile app.
4. Install the Rush GitHub App on the repository in Settings, Integrations, GitHub. A run that needs no repository needs no GitHub.
5. Create an API key in the console under Developers, then start one run: POST /o/{org}/sessions with an agent (claude, codex or opencode) and the task as input. The same call is the create_session tool on the Rush MCP server.
6. Read the result: the pull request and its checks for code, or the report and files under artifacts. A run whose proof is missing ends needs_review, not completed.

## Skip Rush if

- Greptile still does the job you bought it for. This page is the off-ramp, not a reason to leave.
- Rush runs three agents: Claude Code, Codex and OpenCode. It does not host an agent you wrote yourself.
- Repositories come through the Rush GitHub App. A GitLab or Bitbucket repository cannot be a run's repository yet.
- There is no self-hosted or customer-VPC deployment, and we do not publish a compliance report today.
- Compute is metered. Free includes 5 agent-hours a month and Pro 40, each with a weekly ceiling.
- You review the pull request. Rush does not merge for you.

## Questions people actually ask

### What happens to my work on Greptile when I leave?

.greptile/rules.md is plain markdown and moves into AGENTS.md as it is; files.json references become links in it; config.json settings become prose.

### Do I rewrite my instructions for Rush?

Not if they live in the repository. Claude Code reads CLAUDE.md and Codex and OpenCode read AGENTS.md from the checkout, so a file you commit travels with every run. Settings held only inside another product's UI have to be copied into one of those files.

## Keep reading

- [Rush vs Greptile](https://getrush.ai/compare/rush-vs-greptile.md)
- [Greptile alternatives](https://getrush.ai/compare/greptile-alternatives.md)

## Sources

1. Rush, "Rush product requirements", retrieved 2026-09-15. https://getrush.ai/cloud
2. Rush, "Rush pricing (live contract on getrush.ai)", retrieved 2026-09-15. https://getrush.ai/pricing
3. Rush, "Isolation, plainly", retrieved 2026-10-17. https://getrush.ai/docs/concepts/isolation
4. Rush, "Results and proof", retrieved 2026-10-17. https://getrush.ai/docs/concepts/results-and-proof
5. Rush, "Usage and billing", retrieved 2026-10-17. https://getrush.ai/docs/concepts/usage-and-billing
6. Rush, "Rush MCP server", retrieved 2026-10-17. https://getrush.ai/docs/concepts/mcp-server
7. Rush, "Automations", retrieved 2026-10-17. https://getrush.ai/docs/concepts/automations
8. Greptile, "Greptile Pricing", retrieved 2026-10-17. https://www.greptile.com/pricing
9. Greptile, "Greptile docs", retrieved 2026-10-17. https://www.greptile.com/docs
10. Greptile, "Greptile Security", retrieved 2026-10-17. https://www.greptile.com/security
11. Greptile, "TREX", retrieved 2026-10-17. https://www.greptile.com/trex.md
12. Greptile, "Greptile Changelog", retrieved 2026-10-17. https://www.greptile.com/changelog
13. Greptile, "MCP Overview", retrieved 2026-10-17. https://www.greptile.com/docs/mcp-v2/overview.md
14. Greptile, "Fix with your Agent", retrieved 2026-10-17. https://www.greptile.com/docs/integrations/fix-with-your-agent.md
15. Greptile, ".greptile/ Configuration", retrieved 2026-10-17. https://www.greptile.com/docs/code-review/greptile-config.md
16. Greptile, "Greptile vs CodeRabbit", retrieved 2026-10-17. https://greptile.com/greptile-vs-coderabbit