"High performance machines don't have psychological safety. They're about winning." Keith Rabois (
@rabois
) was COO of Square, part of the PayPal Mafia, an early investor in Stripe, Palantir, Airbnb, DoorDash, and Ramp, and a 2x founder. He's spent 25 years obsessing over how to
@lennysan
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High Performance Organizations Sacrifice Psychological Safety for Results
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OpenClaw and LennysProductPass bypass token limits technique
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Very cool way to use @OpenClaw with http://
LennysProductPass.com to avoid token limits cc @railway @ampcode @FactoryAI @warpdotdev -
AI Agents Security Risk: Lethal Trifecta Threat
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.@simonw coined the term "lethal trifecta": when an AI agent has (1) access to private data, (2) exposure to untrusted content (i.e, incoming emails), and (3) the ability to exfiltrate data (i.e replying to email).
— Lenny Rachitsky (@lennysan) 9 avril 2026
"This combination is a huge security problem.
The only way to… https://t.co/1GPwWNcvLt pic.twitter.com/94PlGhsSfc.
@simonw coined the term "lethal trifecta": when an AI agent has (1) access to private data, (2) exposure to untrusted content (i.e, incoming emails), and (3) the ability to exfiltrate data (i.e replying to email). "This combination is a huge security problem. The only way to -
AI faces potential Challenger-scale disaster warns expert
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.@simonw: "We're going see a Challenger disaster for AI and it's going to be very very very bad." https://t.co/LWQPeaxUaH pic.twitter.com/uiElnowAUs
— Lenny Rachitsky (@lennysan) 9 avril 2026.
@simonw
: "We're going see a Challenger disaster for AI and it's going to be very very very bad." -
Congratulations on Instant Launch
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Hell yeah! Go Instant! Congrats on the launch @stopachka and team.
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Anthropic Head of Growth Shares Traumatic Brain Injury Recovery Story
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Crazy fact: Anthropic's Head of Growth @TheAmolAvasare suffered a traumatic brain injury (from a kick to the head during a Muay Thai sparring session) a few years ago. He shared his story of recovery in my newsletter in 2023: https://
lennysnewsletter.com/p/how-a-trauma
tic-brain-injury-made
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Claude CASH Agent Automates Growth Experimentation Lifecycle
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Claude is now automating it's own growth.
— Lenny Rachitsky (@lennysan) 9 avril 2026
Their team built an agent called CASH (Claude Accelerates Sustainable Hypergrowth), which works across the full lifecycle of growth experimentation: (1) identifying opportunities, (2) building the feature, (3) running the test, and (4)… pic.twitter.com/9LeKJ30FcvClaude is now automating it's own growth. Their team built an agent called CASH (Claude Accelerates Sustainable Hypergrowth), which works across the full lifecycle of growth experimentation: (1) identifying opportunities, (2) building the feature, (3) running the test, and (4)
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Cursor Pro offers one free year for new customers
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1 free year of Cursor pro, for new customers of Cursor
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Replit Partnership Updates and Platform Development News
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Partners regularly come and go (it's first-come-first-served on grabbing the offers), but there will be some good news about Replit