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What one day with Fable 5 looks like for a builder
Most private tools that work never become public ones. Here's the afternoon that gap collapsed.
 • Justin Johnson
Apple Rented Its Brain
The company that owns its whole stack just outsourced the one part you'd assume it never would. That choice is the most interesting thing at WWDC.
 • Justin Johnson
AI Is Building AI. Now Read the Footnotes.
Anthropic published striking evidence that AI is automating its own development. The shift is happening. The way it was sold deserves a closer look.
 • Justin Johnson
She Already Built It
I set out to add federated learning to my research agent. She'd already designed and built it in February. This is what compounding autonomous research…
 • Justin Johnson
The skill that edits its own instructions
Self-editing skills, the ecosystem racing to build them, and the flywheel that makes any of it compound.
 • Justin Johnson
Pulling Threads
I dropped my autonomous loop into a blind pharma challenge with zero background in the field. Then I read my own write-up and noticed I kept saying "I".
 • Justin Johnson

May 2026

Opus 4.8 and Workflows - One Careful Pass Is No Longer the Default
Anthropic shipped Opus 4.8 and Dynamic Workflows on the same day. Together they move the unit of agentic work from one model call to dozens of verified…
 • Justin Johnson
The Atomic Unit of Work Just Changed
The model commoditized. The frontier moved to the unit of work running on top of it, and that unit can now reason.
 • Justin Johnson
The Model Is No Longer the Frontier
ACM convenes its first conference on agentic systems next week. Almost none of the papers touch the model. That's the story.
 • Justin Johnson
The Number That Predicts When Your Agent Will Break
A new benchmark gives a name to the failure practitioners keep calling "complex reasoning."
 • Justin Johnson
Last 30 Days: Google I/O 2026 (Audio Overview)
Audio companion to the May 20 Last 30 Days post. Two AI hosts debate why Google's hundred-announcement keynote didn't move the betting markets.
 • Justin Johnson
18:38
Last 30 Days: Google I/O 2026
Google announced roughly a hundred things in two hours. The betting markets didn't move a point.
 • Justin Johnson
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