Cassie Kozyrkov

Cassie Kozyrkov

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Former Chief Decision Scientist at Google

Incentives, Not Seams, Reveal Why Systems Fail
SocialApr 14, 2026

Incentives, Not Seams, Reveal Why Systems Fail

If seams tell you where a system breaks, objectives and incentives tell you why it breaks.

By Cassie Kozyrkov
Start with Decisions, Let AI Serve Humans
SocialMar 31, 2026

Start with Decisions, Let AI Serve Humans

AI should serve people. Obvious, right? And yet many organizations quietly do the opposite. They start with the tool. When you start with tools, humans end up serving the tools. When you start with decisions, tools serve humans. That sounds...

By Cassie Kozyrkov
Compaction Summarizes Prompts, May Lose Safety Constraints
SocialFeb 26, 2026

Compaction Summarizes Prompts, May Lose Safety Constraints

🤣 Chef's kiss: AI agent deletes AI security researcher's inbox while giving the rest of you an object lesson on what compaction is and isn't. ✅ Compaction IS when a model summarizes prompts, instructions, and context before proceeding. ❌ Compaction...

By Cassie Kozyrkov
Instant Answers Shift Leadership Bottleneck to Judgment
SocialFeb 25, 2026

Instant Answers Shift Leadership Bottleneck to Judgment

We’re entering a world where answers are cheap. That doesn’t make leadership easier. It makes it harder. When answers arrive instantly, the bottleneck shifts upstream… to judgment. Judgment is a leadership skill. More insight, less noise → decision.substack.com #DecisionIntelligence #AILeadership...

By Cassie Kozyrkov
Ask What Would Change Your Mind Before Demanding Data
SocialFeb 24, 2026

Ask What Would Change Your Mind Before Demanding Data

Before asking for more data, ask this: What would it take to change your mind? If the answer is “nothing,” no evidence is appropriate. If the answer is unclear, no amount of analysis will help. This is why expensive AI...

By Cassie Kozyrkov
Automation's Real Hurdle: Wanting, Not Technical Skill
SocialFeb 18, 2026

Automation's Real Hurdle: Wanting, Not Technical Skill

Most people think the barrier to automation is technical skill. It isn't. The real barrier is knowing what you want badly enough to bother building it. A year ago, "vibe coding" -- describing what you want in plain English and...

By Cassie Kozyrkov
Leaders Already Possess AI Skills—Just Unlock Them
SocialFeb 17, 2026

Leaders Already Possess AI Skills—Just Unlock Them

One reassuring thing about teaching leaders to work with AI: They've been building AI skills their whole careers... without realizing it. The trick is unlocking what they already know so they can level up with AI. Judgment, context, and institutional...

By Cassie Kozyrkov
AI Wins, Workforce Burns: Address Fear Separately
SocialFeb 16, 2026

AI Wins, Workforce Burns: Address Fear Separately

You can “win” your AI rollout and still lose your workforce. A recent study of 430 manufacturing employees found that even successful AI transformations increase emotional exhaustion. Translation? Your KPIs can trend up, 📈 while motivation trends down. 📉 The...

By Cassie Kozyrkov
Judgment, Not Coding, Is AI Era’s Most Valuable Skill
SocialFeb 12, 2026

Judgment, Not Coding, Is AI Era’s Most Valuable Skill

What’s the most valuable skill in the AI era? ⛔ It’s not coding. ⛔ It’s not prompt tricks. ⛔ It’s not “keeping up with the latest model.” 💪 It’s judgment. Every time a new AI capability drops, the debate centers...

By Cassie Kozyrkov
Clear Goals Prevent AI From Amplifying Poor Judgment
SocialFeb 6, 2026

Clear Goals Prevent AI From Amplifying Poor Judgment

Most AI failures I see aren’t technical. They happen because someone never articulated: • what they’re actually trying to optimize • what constraints matter • what “good” looks like in this situation AI doesn’t fix fuzzy thinking. It faithfully scales...

By Cassie Kozyrkov
Chrome's New Agentic Gemini Will Automate Tasks Soon
SocialJan 29, 2026

Chrome's New Agentic Gemini Will Automate Tasks Soon

In case you missed it... don't miss it. Google has just accounced that #Chrome is going #agentic . Gemini can now do passive work for you in Chrome. It's not amazing yet, but this industry moves fast. What you're rolling...

By Cassie Kozyrkov
AI Training Could Double Worker Productivity, Study Finds
SocialJan 29, 2026

AI Training Could Double Worker Productivity, Study Finds

Does AI training double worker productivity? What's your reaction to this study from Microsoft? Follow for more.

By Cassie Kozyrkov
Alignment, Not Accuracy, Determines AI System Success
SocialJan 21, 2026

Alignment, Not Accuracy, Determines AI System Success

A system can be incredibly accurate and still be wrong for your goals. Because correctness that matters isn’t a mathematical property - it’s a purpose property. If you define the system’s purpose poorly, it will confidently produce the wrong thing...

By Cassie Kozyrkov
AI Aids Thinking, Not Decision-Making Responsibility
SocialJan 20, 2026

AI Aids Thinking, Not Decision-Making Responsibility

People keep asking whether ChatGPT can make decisions for them. Here’s the short answer: no - and that’s exactly why it’s useful. A decision isn’t a paragraph of text. It’s a commitment that allocates resources, creates consequences, and leaves someone...

By Cassie Kozyrkov