About MergeWatch
Last updated: April 13, 2026
MergeWatch is an open-source GitHub App that reviews pull requests using a multi-agent AI pipeline. It was built to answer a simple question: why should the tool that reviews your code cost more as your team grows, run on infrastructure you can’t see, and lock you into a model you didn’t choose?
What it does
Every pull request triggers a parallel pipeline of specialized agents — security, bugs, style, summary, architectural impact — plus any custom agents you define in .mergewatch.yml. The orchestrator deduplicates findings, ranks them by severity and confidence, and posts a single upsert-style comment on the PR. Most reviews complete in under 60 seconds.
Two ways to run it
- Self-hosted (free, AGPL v3). One
docker-compose up. Bring your own LLM provider — Anthropic direct, Amazon Bedrock, any OpenAI-compatible endpoint via LiteLLM (100+ providers), or Ollama for air-gapped environments. Your code never leaves your infrastructure. - Managed SaaS. Install the GitHub App and go. Runs on Claude via Amazon Bedrock with IAM-native auth — no API keys to manage. Priced by pull request volume, not per seat, so hiring doesn’t make your bill bigger.
Why open source
Code review tools read every line your team writes. Closing the source on that is the wrong trade-off. MergeWatch ships under AGPL v3 — the full pipeline, every agent prompt, every orchestrator, every comment template is in the repo. Your security team can audit it. Your engineers can fork it. If we disappear tomorrow, your workflow keeps running.
Who builds it
MergeWatch is built and maintained by Santthosh, a software engineer who has spent the last decade-plus building and shipping developer tooling, web infrastructure, and SaaS products at small startups and large platform teams. MergeWatch is an opinionated response to a recurring frustration: every code review tool on the market either locks you into a closed model, prices per seat so that growing teams pay more for the same thing, or ships as a thin wrapper around a single LLM vendor.
The project is developed in public. Every design decision, prompt change, and pipeline tweak lands as a regular commit on the GitHub repository, and the project itself is dogfooded — MergeWatch reviews every pull request that goes into MergeWatch. Contributions of every size are welcome: pull requests, bug reports, provider adapters, custom agent ideas, documentation fixes, and security reports all land in the same issue tracker. If you want to discuss a larger change before opening a PR, start with a GitHub Discussion first.
Status and roadmap
MergeWatch is at version 1.0 as of April 2026 and is actively maintained. The public roadmap covers expanding the built-in agent library, first-class support for additional LLM providers, and deeper IDE integration so that reviewer comments can flow back into editors like Cursor, Zed, and VS Code without leaving the PR context. Follow the GitHub releases page for changelog updates and new version announcements.