[simonw]

To this date, ChatGPT Code Interpreter is still the most impressive implementation of this pattern that I've seen.

Give it a task, it writes code, runs the code, gets errors, fixes bugs, tries again generally until it succeeds.

That's over a year old at this point, and it's not clear to me if it counts as an "agent" by many people's definitions (which are often frustratingly vague).