The rightmodeler blog

Notes on running agents on the right models.

How we prove model swaps, watch every layer, and turn migrations into code review, without giving up the quality you already shipped.

The vision · Part one

The bill nobody can read.

An agent feature ships, the invoice arrives as one number, and nobody can say which layer spent it. Part one of our vision: giving agents the instruments every other system already has.

· 5 min read

The vision · Part two

The Tuesday problem.

The group chat asks: are we switching? And everyone goes quiet. Part two of our vision: why model migrations should arrive as pull requests with the evidence attached.

· 6 min read

Founding story

We were picking models by vibes. Then the bill arrived.

We shipped agentic systems for years while guessing which model belonged at which step. rightmodeler is the tool we kept rebuilding by hand to stop guessing, made properly.

· 5 min read