How Stripe built “minions”—AI coding agents that ship 1,300 PRs weekly from Slack reactions | Steve Kaliski (Stripe engineer)

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Summary

Steve Kaliski discusses how Stripe’s AI coding agents, known as ‘minions’, automate the creation of 1,300 pull requests weekly, enhancing developer productivity and efficiency.

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Key Insights

“How Stripe’s minions write 1,300 pull requests per week with minimal human intervention” — Introduction to the capabilities of Stripe’s AI coding agents.

“Why good developer experience benefits both humans and agents” — Discussion on the importance of developer experience in enhancing AI performance.

“The future of ephemeral, API-first businesses for agents” — Speculation on the evolving landscape of software businesses driven by AI agents.

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Topics

• ai-coding-agents
• developer-productivity
• cloud-development
• machine-payments

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Full Article

Steve Kaliski is a software engineer at Stripe who has spent the past six and a half years building developer tools and payment infrastructure. Hes part of the team that created minionsStripes internal AI coding agents, which now ship approximately 1,300 pull requests per week with minimal human intervention beyond code review. In this episode, Steve demonstrates how Stripe engineers activate development work from Slack and leverage cloud-based development environments for parallel agent workflows, and demos machine-to-machine payments where AI agents transact autonomously with third-party services.Listen or watch on YouTube, Spotify, or Apple PodcastsWhat youll learn:How Stripes minions write 1,300 pull requests per week with minimal human interventionWhy a good developer experience for humans creates better outcomes for AI agentsThe critical role of cloud development environments in unlocking AI-powered engineering velocityThe machine payment protocol that lets AI agents spend money to accomplish tasksThe code review strategy for handling thousands of agent-written PRsWhy non-engineers at Stripe are starting to use minions to ship codeThe future of software businesses built primarily for agent consumersBrought to you by:OptimizelyYour AI agent orchestration platform for marketing and digital teamsRipplingStop wasting time on admin tasks, build your startup fasterIn this episode, we cover:(00:00) Introduction to Steve(02:39) Stripes minions and their effect on Stripe as a whole(04:42) Why activation energy matters more than execution(05:44) What is a minion? The technical architecture(06:52) Demo: Activating a minion from Slack with an emoji(09:04) Why good developer experience benefits both humans and agents(11:22) Walking through the agent loop and system prompts(13:42) Why Stripe chose Goose as their agent harness(16:00) The role of Stripes developer productivity team(17:15) Why cloud environments unlock multi-threaded AI engineering(21:14) One-shot prompting: from Slack to shipped PR(22:04) How Stripe handles code review for 1,300 AI-written PRs weekly(23:44) Non-engineers using minions across the company(24:53) Demo: Planning a birthday party with Claude and machine payments(32:15) Quick recap(35:08) The future of ephemeral, API-first businesses for agents(36:36) Lightning round and final thoughtsTools referenced: Goose (AI agent harness): https://github.com/block/goose Claude Code: https://claude.ai/code Cursor: https://cursor.sh/ VS Code: https://code.visualstudio.com/ Slack: https://slack.com/ Browserbase: https://browserbase.com/ Parallel AI: https://www.parallel.ai/ PostalForm: https://postalform.com/ Stripe Climate: https://stripe.com/climateOther references: Stripe machine payments: https://docs.stripe.com/payments/machine Blue-Green Deployment: https://martinfowler.com/bliki/BlueGreenDeployment.html Git worktrees: https://git-scm.com/docs/git-worktreeWhere to find Steve Kaliski:Twitter: https://twitter.com/stevekaliskiLinkedIn: https://www.linkedin.com/in/steve-kaliski-079a7710/Where to find Claire Vo:ChatPRD: https://www.chatprd.ai/Website: https://clairevo.com/LinkedIn: https://www.linkedin.com/in/clairevo/X: https://x.com/clairevoProduction and marketing by https://penname.co/. For inquiries about sponsoring the podcast, email jordan@penname.co.

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