Matt Shumer (@mattshumer_)

My Model Stack After the Wildest 8 Days in AI: Opus 4.5: Most daily code tasks where I know how I want the model to do what I want. Fast, clean, reliable, but often starts writing code before it grabs all the context it needs (measures once, cuts twice). Codex‑Max: Larger, more difficult code task...

<developer_note> is one of the most powerful, yet underutilized prompting techniques. How (and why) to use it:...