Stripe Minions Automate 1,300 PRs Weekly

Stripe's internal coding agent Minions operates in a fully unattended mode with no human involvement, generating over 1,300 pull requests (PRs) per week. These PRs contain no manually typed code, and engineers only perform final code reviews.

Stripe's codebase consists of hundreds of millions of lines and uses stacks such as Ruby (non-Rails) and Sorbet, which are rarely seen in LLM training data. Due to financial regulations and complex dependencies, applying existing open-source agents was difficult. Consequently, Stripe chose to integrate agents on top of its existing developer productivity infrastructure (source control, CI, development environments).

Key Features and Operations

• Slack Integration: Tasks are initiated solely through natural language instructions in Slack threads, with the agent using the thread and links as context.
• Isolated Execution Environment: Agents run in parallel within 'Devboxes' that are ready in 10 seconds, operating in isolated environments without sensitive credentials to ensure security.
• Orchestration: Instead of a simple tool-calling loop, it uses a blueprint structure combining deterministic nodes and agent nodes.
• Use Cases: Primarily deployed for well-scoped tasks such as fixing flaky tests, codebase migrations, and adding endpoints to internal tools.

This approach presents a new paradigm that saves developer 'Attention' while improving maintenance efficiency for large-scale, mature codebases.