Devin: $20,000 in a Month to Manage 15 AI Agents

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Key Takeaways

1Ryan Carson claims to have spent $20,000 on Devin in one month

2He says he manages 15 agents, with Watchdog for customer success and a LAN PR skill handling 40 PRs/day without QA

3The product flow goes through Claude Design for the spec, then Codex for building

💡Why it matters — The testimony outlines concrete practices of using AI agents in production by a solo founder, from design to operations.

Ryan Carson, solo founder of Untangle, claims to have spent $20,000 on Devin in one month. He outlines a setup with 15 agents, a Watchdog monitoring playbook, and a LAN PR skill handling 40 PRs per day without QA. He favors a Claude Design flow for specification, then Codex for building, and dismisses the idea of optimizing solely for the quantity of AI outputs.

They Dismiss the Race for Outputs and Focus on Decision-Making

Ryan Carson and Claire Vo believe that aiming for more AI-generated outputs is a misguided goal and that something else should be optimized. They describe distinct approaches to managing agents' decision fatigue. Ryan Carson compares Slack and Devin threads for organizing asynchronous team communication. Buzz, backed by Jack Dorsey, is also mentioned for this mode of exchange.

Specify with Claude Design, Build with Codex

Their design flow goes through Claude Design to draft a specification in Markdown, before turning to Codex to create the product. They explain that they use this tandem to build a technical design system. Execution management also relies on simple tools, with Ryan Carson mentioning an analog to-do system like Ugmonk.

AI Agents in Production: 15 Devin, Watchdog, and LAN PR

Ryan Carson states that he operates 15 Devin agents simultaneously, orchestrated with folders, P0 threads, and a paper list rather than a dashboard. He indicates that he uses cloud agents for operations that go beyond just code and details when to mobilize Codex, Devin, or Claude Code. He designed Watchdog to replace a customer success team and monitor accounts in each firm. His LAN PR skill allows him to handle 40 daily PRs without a QA team’s intervention, featuring review loops, an explanatory video, and self-merging. He claims to have almost entirely abandoned local agents and only resorts to Codex in specific situations. For examples, Merge Mommy is presented as Claire's Eve agent for PR risk assessment, deployed on Vercel, and comparisons are made with executive assistant tools like Polly the OpenClaw and Claude Code on Mac Mini.

$20,000 Spend, Untangle Pivot, and Tools Cited

Ryan Carson asserts that he spent $20,000 on Devin in one month. He mentions a PMF pivot for Untangle towards divorce and B2B growth, and reports that an in-person meeting with a client changed the product's direction. He explains that he recruited his first engineer without a phone interview or formal meeting. The referenced tools include Devin from Cognition, Codex from OpenAI, Claude Code and Claude Design from Anthropic, OpenClaw, Cursor, and BugBot described as a PR review tool integrated with Devin. Sentry is mentioned for error monitoring in Watchdog, and the documentation for playbooks and Devin skills is accessible.

Founder Profile

Ryan Carson is a five-time founder and currently leads Untangle, a B2B SaaS platform dedicated to family law firms. He co-founded Treehouse and has nearly two decades of experience at the helm of tech companies. Active on X, he continuously shares his journey as a solo founder, along with his expenses related to AI tools.