pymoo

pymoo is a skill for Claude Code, Codex from AndyZhuang/Opentest. It costs 46 tokens per session (4,233 once invoked), scanned A, a copy of pymoo, MIT.

A Python framework for finding the best choices when an engineering or planning problem has one or more goals and constraints.

In plain words
What is it for?
Use it for single- or multi-objective optimisation, evolutionary algorithms, constrained problems, benchmark tests, and Pareto-front analysis.
Why use it?
It helps compare trade-offs, such as reducing cost while improving performance, by finding sets of solutions rather than forcing one objective.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is python3 scripts/single_objective_example.py.

Good fit Use it for single- or multi-objective optimisation, evolutionary algorithms, constrained problems, benchmark tests, and Pareto-front analysis.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/AndyZhuang/Opentest
agentmods
npx agentmods add skills/andyzhuang/opentest/pymoo

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for pymoo

README.md
[![agentmods](https://agentmods.dev/badge/skills/andyzhuang/opentest/pymoo/github.svg)](https://agentmods.dev/skills/andyzhuang/opentest/pymoo)
Your own site
<a href="https://agentmods.dev/skills/andyzhuang/opentest/pymoo"><img src="https://agentmods.dev/badge/skills/andyzhuang/opentest/pymoo/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for pymoo

Your own site · 80×15
<a href="https://agentmods.dev/skills/andyzhuang/opentest/pymoo"><img src="https://agentmods.dev/badge/skills/andyzhuang/opentest/pymoo.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,233 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 95% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00046 $0.04233
Opus 5 $0.00023 $0.02116
Sonnet 5 $0.00009 $0.00847
Haiku 4.5 $0.00005 $0.00423

Measured 7d ago against content hash 385cde371b4f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

pymoo scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

95% identical to pymoo — 3 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/labclaw/general/pymoo/SKILL.md · 571 lines

How it starts

The opening of the file, as written. The whole thing — 571 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Pymoo - Multi-Objective Optimization in Python

Overview

Pymoo is a comprehensive Python framework for optimization with emphasis on multi-objective problems. Solve single and multi-objective optimization using state-of-the-art algorithms (NSGA-II/III, MOEA/D), benchmark problems (ZDT, DTLZ), customizable genetic operators, and multi-criteria decision making methods. Excels at finding trade-off solutions (Pareto fronts) for problems with conflicting objectives.

When to Use This Skill

This skill should be used when:

  • Solving optimization problems with one or multiple objectives
  • Finding Pareto-optimal solutions and analyzing trade-offs
  • Implementing evolutionary algorithms (GA, DE, PSO, NSGA-II/III)
  • Working with constrained optimization problems
  • Benchmarking algorithms on standard test problems (ZDT, DTLZ, WFG)
  • Customizing genetic operators (crossover, mutation, selection)
  • Visualizing high-dimensional optimization results
  • Making decisions from multiple competing solutions
  • Handling binary, discrete, continuous, or mixed-variable problems

Core Concepts

The Unified Interface

Pymoo uses a consistent minimize() function for all optimization tasks:

from pymoo.optimize import minimize

result = minimize(
    problem,        # What to optimize
    algorithm,      # How to optimize
    termination,    # When to stop
    seed=1,
    verbose=True
)

Result object contains:

  • result.X: Decision variables of optimal solution(s)
  • result.F: Objective values of optimal solution(s)
  • result.G: Constraint violations (if constrained)
  • result.algorithm: Algorithm object with history

Problem Types

Single-objective: One objective to minimize/maximize Multi-objective: 2-3 conflicting objectives → Pareto front Many-objective: 4+ objectives → High-dimensional Pareto front Constrained: Objectives + inequality/equality constraints Dynamic: Time-varying objectives or constraints

Quick Start Workflows

Read the full file on GitHub · 571 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 7d ago First seen · 571 lines · 46 tokens per session scan A 385cde371b4f

Subscribe to this mod's changes

pymoo is a skill published in the GitHub repository AndyZhuang/Opentest (22 stars, last pushed 6mo ago), licensed MIT. It adds 46 tokens to every session and 4,233 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 95% identical to pymoo, differing in 3 lines, and is treated as a copy.

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