YC Winter 2027 RFS: From Easy to Hard for a Software Builder
Eleven startup requests, explained in plain language, with practical ideas spanning AI workflows, government, infrastructure, robotics, and space.
Deep dive · 2026-10-30 · 8 min read
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Prediction Markets: Right Calls, Wrong Returns?
Why getting most election calls right can still lose money: prediction-market odds, fees, and a provisional midterms backtest.
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From the notebook
pstack in practice: 3 cases and 5 tips for working with agents
Three practical ways to use pstack: compare website prototypes before choosing a design, measure where an app is slow, and recover earlier decisions from code and chat history.
Tutorial · 2026-10-28 · 7 min read
The core of pstack: verification skills that let agents check their own work
AI agents can already write plenty of code. But once they finish, someone still has to open the app, click through the flow, report the errors, and check whether the next fix actually works.
Tutorial · 2026-10-23 · 7 min read
Getting started with pstack: core concepts, setup and playbooks
In her September 21 post, Grok Bot developer Lauren Tan said she shipped 2,500 PRs (proposed code changes) to production the previous month. How did she do it?
Tutorial · 2026-10-23 · 5 min read