The braincell blog
Engineering, product, and the future of agentic software. The first posts go live as soon as the first cohort of founders ships.
Featured
The agent loop, in detail: five phases that keep every shipped app honest.
We tear down a single braincell turn end to end. From the first parsed prompt, through the sandbox boot, the five-strike verification gate, all the way to the snapshot that lands on your timeline.
More from the field.
Short reads on the platform and the people shipping with it.
How braincell ships a working product before lunch
The five-step agent loop (describe, design, build, verify, deploy) and the snapshot/rollback contract that keeps it honest.
Why every project runs in its own isolated sandbox
Static previews lie. A real sandbox runs your install scripts, hits real environment variables, and surfaces real failures before deploy.
Routing between Opus 4.7, Sonnet 4.6, and Haiku 4.5
When to send a turn to the biggest model in the room, when to drop to Haiku for a tool call, and how to keep credit usage predictable.
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