# Analyze Performance Diagnose

Step of the analyze-performance playbook: flags tracking breaks with fixes and explains...

- Repository: https://github.com/gooseworks-ai/goose-skills (1276 stars)
- Category: Engineering
- License: MIT
- Last updated: 2026-10-27
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add gooseworks-ai/goose-skills --skill analyze-performance-diagnose -g -a claude-code -y`
Codex: `npx skills add gooseworks-ai/goose-skills --skill analyze-performance-diagnose -g -a codex -y`
Cursor: `npx skills add gooseworks-ai/goose-skills --skill analyze-performance-diagnose -g -a cursor -y`
Gemini CLI: `npx skills add gooseworks-ai/goose-skills --skill analyze-performance-diagnose -g -a gemini-cli -y`

## Description

Step of the analyze-performance playbook: flags tracking breaks with fixes and explains each big metric move with evidence, confidence and ruled-out causes. Run analyze-performance instead; not for direct use.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# Plumbing and the why (atom)

**Load:** `../analyze-performance/references/diagnosis.md`.

**Inputs:** the clean dataset; the overclaim ratio and its trend; the change log (`decisions.md`); push failures/disapprovals reported by run-paid-campaigns or the marketer; the competitor watch digest; research-market's "What people are saying" section (newest `research/market/<D>-read.md`; check its window); the promo calendar and stock notes from the brief; destination URLs of top ads.

**Do:**
1. Plumbing: test each break signature (ratio jump/collapse, zero-conversion days with spend, ROAS spike with flat orders, LPV/click drop, UTM traffic missing). For each break: symptom, likely location, what to check, the fix when identifiable, what it blocks. Mark affected numbers suspect.
2. For each metric that moved materially at equal maturity: read the change log, check noise, mix shift, breakdown effect and denominator changes, then walk the cause checklist in order. One piece of evidence per named cause; confidence; ruled-out and unconfirmed causes listed.
3. Page/message match for the top 2, 3 winners and losers (open the page if the host can browse; else ask for a screenshot): product, promise, offer, price, stock.

**Output:** the report's Plumbing and Why-it-moved sections, and mismatches to note.