# Confusion Matrix Generator

> Inspect classifier errors with confusion matrices after predictions already exist. Use for per-class error analysis, threshold tradeoffs, and label-confusion diagnosis; not for regression metrics or full model training ownership.

- Skill: `majiayu000/confusion-matrix-generator` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/confusion-matrix-generator`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/confusion-matrix-generator/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- License: MIT
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/confusion-matrix-generator

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# Confusion Matrix Generator

## Purpose

Use this skill when the user already has classification outputs and needs to understand where the model is getting confused.

## When to Use

Use this skill when:
- Breaking down false positives and false negatives by class
- Comparing thresholds or class weights for a classification model
- Explaining which classes are systematically confused with one another

## Not For / Boundaries

- Regression evaluation: use `evaluating-machine-learning-models`
- Leakage audits: use `ml-data-leakage-guard`
- End-to-end training runs: use `training-machine-learning-models`

## Typical Outputs

- Confusion matrix tables or heatmaps
- Per-class precision/recall breakdowns
- Actionable notes on thresholding, relabeling, or class balancing

## Related Skills

- `evaluating-machine-learning-models` for the broader metric suite
- `feature-importance-analyzer` when the next question is why a class fails