How Snap Built a Production System Where Agents Write 90% of Code

Check out Gartner Symposium: https://cxo.news/KGg8XY ======== More than 90% of the code at Snap is now written by AI agents, and a code review agent checks most of it within ten minutes. Saral Jain, SVP, Head of Engineering and CIO at Snap Inc., built the system that makes that safe for nearly a billion monthly users. He explains the golden path of 14 managed agents, the guardrails that account for more than half of the investment, and why accountability still rests with a named human for every change that ships. YOU'LL DISCOVER ✅ Why Snap funds 14 blessed agents on a golden path instead of letting every team build its own ✅ How Casper turns a Slack conversation into a sandboxed pull request that CodePal reviews before a human sees it ✅ Why more than half of Snap's agent investment goes into evals, code review and rollback rather than into building ✅ The risk-tiering test that separates an internal dashboard from a privacy-sensitive change ✅ Why Saral says the risk is not AI-generated code, it is unowned code ✅ How Snap measures value on outputs, with commits up 75% year over year and severe outages down 57% ✅ Why context beats model 100 out of 100 times, and what context actually means inside a 15-year-old codebase ✅ Four pieces of advice for CIOs, ending with why adoption has to start at the top ⏱️ TIMESTAMPS 0:00 Agents write the code, engineers own it 7:17 Agents as teammates with defined personas 12:52 Systems for agents, features for humans 16:09 How Snap governs thousands of agents 22:39 Invest in guardrails before building agents 29:46 Output metrics and the coordination tax 33:08 Context you can give, judgment you cannot 38:14 The risk is unowned code 44:58 Working with unpredictable AI systems 47:13 Agents beyond engineering, and human skills 50:24 Token spend and model routing 52:35 Advice for leaders and the risks ahead Subscribe for weekly conversations with leading business and technology leaders. Get the CXOTalk newsletter: https://newsletter.cxotalk.com Show notes, transcript, and summary: https://www.cxotalk.com/episode/snap-agentic-ai-software-development-at-scale Episode 929 | Recorded August 21, 2026 #CXOTalk #AgenticAI #SoftwareDevelopment #EngineeringLeadership #AICodeReview #Snap #CIO #AIGovernance #DeveloperProductivity #snapchat