Mistle
Open-source background agents that work across repositories, review pull requests, and run
Mistle is an open-source platform for running engineering agents that work across repositories, review pull requests, investigate bugs, and prepare code changes for human review. It installs locally with Docker Compose from the GitHub README, which creates a local config and starts the stack with a dashboard.
Agents can be configured with specific sandboxes, repositories, and tools, with scheduled snapshots to keep dependencies current. Sessions can be triggered by webhooks, app mentions, or cron schedules, and linked GitHub and Slack accounts attribute work to the person who started it. Integrations span models (OpenAI, Anthropic, and others), git tools (GitHub, GitHub Enterprise Server, Jira, Linear), sandboxes (E2B, Modal, Tensorlake), and a range of tools including Slack, Sentry, Datadog, PostHog, Stripe, and Google Workspace. Agents can also be built for non-engineering functions such as product, marketing, sales, HR, finance, legal, and support.
Mistle is aimed at engineering teams and other departments that want agents to take action across their existing tools. The pages describe an open-source, self-hosted setup but do not state pricing, plans, or trial terms.
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