Claude Code writes code.
Hyrax architects the codebase.
Claude Code is a capable terminal agent that reads a repository and makes real changes in a session, and developers get a lot out of it. Hyrax is not a session: it runs continuously over the codebase and verifies each change against the project test suite.
- Hyrax audits roughly 400 of its own repositories.
- Free plan: full access, up to 100 PR reviews a month, a $30 starter credit, and $10/month ongoing.
Verified end to end, with no Claude Code handoff
What changes when Hyrax runs above the tools.
Judgment above the agents
Claude Code executes the task it is given. Hyrax decides what is worth doing and whether the result fits the system it lands in.
Verified before review
Every change runs the project baseline tests, build and lint, and passes a second reviewer agent, before the pull request exists.
Context that compounds
The map of the codebase lives in the repository and strengthens with every merge, so the next decision starts from everything learned before it.
How Hyrax and Claude Code make decisions.
| Decision criteria | Claude Code | Hyrax |
|---|---|---|
| Unit of work | The task a developer assigns in a session. | The whole repository, audited continuously across six domains. |
| Codebase context | Explores the repository during the session, guided by CLAUDE.md. | A durable map committed to the repository as HYRAX.md and .hyrax/discovery, so it strengthens as the codebase changes. |
| Output type | Edits, commits and pull requests produced in the session. | Verified pull requests, plus issues ranked by severity and effort. |
| Verification | Runs the commands the developer permits, including tests. | Baseline tests, build, lint and a second reviewer agent run against the project itself before a pull request opens. |
| Human control | The developer drives the session and merges. | A human approves and merges every pull request. Hyrax never merges on its own. |
| Delivery surface | Terminal, IDE extensions and GitHub Actions. | GitHub pull requests, with issues and posture in the Hyrax console. |
| Pricing model | Included in Claude plans from $20 per month, or API usage. | Free plan with a $30 starter credit and $10/month ongoing. Paid is $30 per user per month and each paid user gets $30/month of credits. |
Read how Claude Code describes itself: claude.com/product/claude-code(opens in a new tab)
Comments on a diff, or a verified pull request.
- 01A developer assigns Claude Code a task.
- 02Claude Code writes code for that task and stops when the task is done.
- 03The team decides whether the change fits the wider system, then merges.
- 01Maps the codebase and keeps the map in the repository
- 02Applies architectural judgment across six domains
- 03Opens a verified pull request that a human merges
GitHub-native. Human-controlled. Verified before merge. No training on customer code.
From install to the first verified pull request.
Install the GitHub App
Grant read access to the repositories in scope. No card is required to start.
Hyrax maps the repository
Discovery writes HYRAX.md and .hyrax/discovery into the repository, so humans and AI tools read the same context.
Review the first pull request
Approved upgrades arrive as verified pull requests. A human merges every one.
Both tools solve real problems.
Choose Claude Code if
A developer wants a powerful agent to drive directly, with full control of scope and command execution. Claude Code is one of the best tools for that.
Choose Hyrax if
The work should happen without a developer driving it, to a standard that does not change between sessions. Hyrax audits six domains and verifies every change the same way each time.
Included in Claude subscriptions, or API usage per session.
Free plan with a $30 starter credit and $10/month ongoing. Paid is $30 per user per month, and each paid user gets $30/month of credits.
Questions about Claude Code and Hyrax.
Does Hyrax work alongside Claude Code?
Yes, and most teams run both. Claude Code keeps doing its job. Hyrax works at the level of the whole codebase, decides what is worth changing, and delivers verified pull requests. Nothing about the Claude Code setup has to change.
What does Hyrax change in the repository?
Discovery writes HYRAX.md and a .hyrax/discovery directory, which document the architecture, conventions and risk areas of the codebase. Everything else arrives as a normal pull request on its own branch. Hyrax has no write access to the default branch.
How does pricing work?
The free plan includes full access, a $30 starter credit and $10/month of credits ongoing, with no card required. The paid plan is $30 per user per month, and each paid user gets $30/month of credits. Pull request reviews are included on every plan.
What happens after signup?
Installing the GitHub App and granting access to a repository takes a few minutes. Hyrax maps the codebase, then runs the first audit and returns issues ranked by severity and effort. The first verified pull requests follow once an audit is approved.