Reasoning became a coding workflow
Claude 3.7 Sonnet made a product category visible: a model that could answer quickly, spend longer reasoning and work through a coding task as an agent. The important change was not a single benchmark. It was the connection between model deliberation, a terminal and a human review loop.
Coding agents expose the difference between producing a plausible answer and maintaining a working system. They need repository context, tests, permissions and a clear boundary around what may be changed. More reasoning can help, but it also makes provenance and interruption more important.
The coding workflow became an early laboratory for delegated work. It showed that autonomy is not a personality trait. It is a stack of tools, authority and review.
