Stripe's In-House Minions: End-to-End Coding Agent with Over 1300 Weekly PRs and Zero Manual Coding

In February 2026, Stripe officially disclosed that its self-developed coding agent Minions has been deployed at scale: over 1,300 pull requests (PRs) are fully automated by the agent every week, from Slack commands to passing CI checks, with zero manual code writing and only review required for merging. The core architecture includes an isolated Devbox with 10-second warm-up, a custom Harness forked from Block Goose, hybrid orchestration of Blueprint workflows and agents, the Toolshed centralized MCP tool layer (with nearly 500 tools), and a feedback closed loop of up to two rounds of CI. This article sorts out its design highlights and inspirations for enterprise unattended coding agents.