Every mature system is carrying around lessons that were never written down. They’re encoded as validations, retries, timeouts, workflows, and exceptions. The implementation remembers. The organization forgets
The Conversation Is the Commit - The Phoenix Architecture
Evaluations Are the Real Codebase - The Phoenix Architecture
Why behavior outlives implementations
Regenerative Software - The Phoenix Architecture
chadfowler.com/phoenix
Reference implementation for the Phoenix Architecture. Work in progress.
The Forgetting Problem: Persistence Architectures and What They Cost - Astral's Blog
The Phoenix Primitives - The Phoenix Architecture
The architecture of a regenerative system is defined entirely by what you can't delete.
The Specification Is Not a Document - The Phoenix Architecture
Imagine joining a software project a few years from now. It is a large, mature system. It has thousands of business rules, years of operational experience,…
UI Is a Conservation Layer - The Phoenix Architecture
Why the user interface is the last to become regenerative
When Does a Specification Become a Program? - The Phoenix Architecture
A spec can contain prose, tests, schemas, formal models, even executable code. The useful boundary is not the syntax but, rather, what survives: if you throw the implementation away, what has to remain so you can build the next one?
When Does a Specification Become a Program? - The Phoenix Architecture
A spec can contain prose, tests, schemas, formal models, even executable code. The useful boundary is not the syntax but, rather, what survives: if you throw the implementation away, what has to remain so you can build the next one?
The Regenerative Grain - The Phoenix Architecture
In 2014 I gave a talk called Tiny (keep things small enough to understand) In 2026, small means something different. Small means safe to delete. New in the Phoenix Architecture series: The Regenerative GrainI
Letta
Making machines that learn. Create stateful agents that remember everything, learn continuously, and improve themselves over time.
Production Is a Compiler Input - The Phoenix Architecture
Compile to Architecture - The Phoenix Architecture
For a long time we’ve treated frameworks as the target of software development. But if systems are meant to be regenerated and replaced safely, the real compilation target has to be the architecture itself.
The Shape of Memory Benchmarks
Why the familiar memory benchmarks are outdated, how the agent-native work looks today and why design your own.
Ambient Associative Memory
Most agent memory waits to be queried. Ambient memory runs on every tool call — past lessons surface on their own, no rules list required.
