Iterative artifact refinement - hone any artifact or workspace over multiple rounds using criteria-driven judge feedback, runnable evaluators, and focused directional improvements
$claude plugin marketplace add 2389-research/simmerInstalls into the current project.
Install simmer by running `claude plugin marketplace add 2389-research/simmer`, then use it for the current task and follow its documentation at https://github.com/2389-research/simmer.