simmer

Simmer

You wrote a prompt. It works. But is it *good*? Simmer runs your artifact through multiple rounds of criteria-driven refinement — each round, a panel of judges reads your code, understands the problem, and proposes specific improvements.

[Read the story behind Simmer →](https://2389.ai/posts/simmer-skill/)

Iterative artifact refinement — take any artifact or workspace and hone it over multiple rounds using criteria-driven feedback.

Installation

/plugin marketplace add 2389-research/claude-plugins
/plugin install simmer@2389-research

What This Plugin Provides

One skill (`simmer`) with four subskills that run the refinement loop:

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Trigger Phrases

Say any of these to start a simmer loop:

"simmer this", "refine this", "hone this", "iterate on this", "make this better", "improve this over a few rounds", "polish this", "tighten this up", "optimize this pipeline", "find the best model for this task", "tune this configuration"

Any request to **iteratively improve** an artifact triggers simmer.

When to Use Simmer vs. Cookoff vs. Omakase-Off

Situation	Use	Why
You have an artifact and want it better	simmer	Iterative refinement against criteria
You want parallel code implementations competing	cookoff	Parallel generation + fixed criteria + pick winner
You don't know what you want yet	omakase-off	Parallel designs + react + discover preference

**Rule of thumb:** Simmer = serial iteration. Cookoff/omakase-off = parallel exploration.

Quick Example: Single File

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