Protect your project. Scale your review.
High-volume open source projects receive dozens of PRs a week from contributors who don't know your codebase. Mesrai pre-screens every contribution for bugs, regressions, and rule violations — so you spend your limited time on the PRs that need real human judgement.
- 01
External contributors don't know your architectural patterns — and cannot reasonably be expected to.
- 02
Reviewer burnout is the leading reason active open source projects go unmaintained.
- 03
A single merged regression from an unknown contributor can break thousands of downstream users.
- 04
You must be welcoming enough to attract contributors while strict enough to protect stability.
Every PR gets a full multi-agent review the moment it opens — before a maintainer has read a line. Obvious bugs, style violations, missing tests, and breaking API changes are flagged as inline comments, saving your first look for the issues that actually need human judgement.
Convert your project's contribution guidelines into Mesrai Rules: missing changelog entries, incorrect module structure, API-breaking changes without a deprecation path. Mesrai enforces them automatically and explains the violation to the contributor in the PR comment.
mesrai-graph maps the contributor's changes against your module dependency graph and flags cross-file side effects the contributor could not have known about without deep codebase familiarity. Regressions in downstream consumers surface before merge.
Mesrai's comment style is calibrated for open source: specific, actionable, and encouraging. Contributors receive feedback that helps them understand why something is wrong and how to fix it — reducing the abandonment rate on promising PRs from first-time contributors.
Screen every external PR for bugs and regressions before a maintainer reads it
Reduce maintainer time-per-PR review by 50–70%
Catch architectural violations from contributors unfamiliar with the codebase
Keep the project welcoming while enforcing quality standards consistently
How does Mesrai review PRs from forked repositories without exposing our config?+
Mesrai uses your base repository's configuration (rules, agent settings, severity thresholds) when reviewing a fork PR — the contributor's fork has no access to those settings and cannot modify them. The GitHub App only requires read access to the base repo's .mesrai/ config directory. Fork contributors see the review comments on their PR exactly like any other reviewer's feedback; they do not see your rule definitions or internal tooling configuration.
Can Mesrai be configured to be more encouraging with first-time contributors?+
Yes. Mesrai can detect first-time contributors by checking whether the PR author has merged a PR to the repository before. For first-time contributors, you can configure a separate rule profile with a higher advisory threshold — flagging fewer low-severity issues and focusing on the blockers. You can also set a custom welcome message that Mesrai appends to its first review on a contributor's first PR, pointing them to your CONTRIBUTING.md or community chat.
Does Mesrai help with a large backlog of already-open PRs?+
Mesrai only reviews PRs when they are opened or updated — it does not retroactively review a backlog of pre-existing open PRs unless those PRs receive a new commit or you manually trigger a re-review via the Mesrai dashboard. For a backlog triage, the recommended approach is to close and re-open stale PRs or push a trivial rebase commit, which triggers a fresh review. This is intentional — reviewing months-old PRs against current rules would generate confusing findings on code that was valid at merge time.
How do we version-control contribution rules so the community can propose changes?+
Mesrai Rules for a repository live in a .mesrai/rules/ directory committed to the repository itself. This means contribution rules are version-controlled alongside the code, changes are visible in the git history, and the community can propose rule updates via a pull request — which Mesrai will itself review. Maintainers can protect the .mesrai/ directory with a CODEOWNERS entry to require maintainer approval on any rule change.
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