GETTING THE MOST OUT OF OPUS 5.5

Summary from the TLDR Dev newsletter

Give Opus 5.5 a complete task, define what done means, and state when it should stop for input. The model already reasons before every reply, so prompts such as “think carefully” add delay without improving the result. For long coding runs, persistent task files and explicit rules about when to continue help the work survive context compaction and remain steerable.