effort-sweep.txt
I'm going to run the same three tasks at low, medium and high effort.
Here are the tasks: <paste three real tasks from your project>

For each run, I'll paste the output and how long it took. Help me
compare: was the result actually different? Where did the extra
effort change the outcome, and where did it just add time?

Then recommend a default for routine work and a level for hard
problems, specific to this project.

Level names don't mean the same thing across models. If you tuned effort on Opus, re-tune it. Low on Fable 5.1 is often better than you expect.