Simon Willison’s Weblog

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Wednesday, 4th March 2026

Something is afoot in the land of Qwen

I’m behind on writing about Qwen 3.5, a truly remarkable family of open weight models released by Alibaba’s Qwen team over the past few weeks. I’m hoping that the 3.5 family doesn’t turn out to be Qwen’s swan song, seeing as that team has had some very high profile departures in the past 24 hours.

[... 705 words]

Agentic Engineering Patterns >

Anti-patterns: things to avoid

There are some behaviors that are anti-patterns in our weird new world of agentic engineering.

Inflicting unreviewed code on collaborators

This anti-pattern is common and deeply frustrating.

Don't file pull requests with code you haven't reviewed yourself. [... 331 words]

# 5:34 pm / ai, llms, ai-ethics, coding-agents, ai-assisted-programming, generative-ai, agentic-engineering, code-review

Tuesday, 3rd March 2026

2026 » March

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