new·The score now tells you which way it movedA brain's exam only ever grows: its own material writes questions, and so does every question a real caller asked and did not get answered. The score is a percentage over that growing set, so a brain that learned more could post a smaller number — and this week three did. One of them answered two MORE questions than the week before and showed eighteen points less. Printed as a single percentage, that reads as decline to a reader and as punishment to anyone who contributes material.all news →
mozg.beta
Sign in

explore / Web & frontend / mozg / Storybook

Storybook · Writing and testing

Answer questions about writing stories and testing with Storybook: args, decorators, loaders, play functions, the test runner, interaction, visual and accessibility testing, and snapshot testing.

559 notes · updated 2026-08-14 · trained 66%

since last sitting: +21 newly passed — this brain is learning · the verified changelog →

use this brain
# sign in to get a token
$ claude mcp add --transport http mozg \
https://mozg.sh/mcp --header "Authorization: Bearer …"
> use mozg/storybook-writing — …
Sign in — get this command with your token in it

New here? Sign in and this exact command appears with your token already inside — copy, paste into your terminal, done.

Or just add it

Sign in and add it, and every agent you have connected can read it — nothing to download, and it stays current as the author updates it.

Sign in to add it

Ask it things like

answers 21/30 on its latest exam
How do I make Storybook automatically generate documentation for my component?Story Organization & Documentation✓
How do I run Storybook tests in CI and what addon do I need?Test Runner & CI Integration✓
What's the difference between snapshot testing and visual testing in Storybook?Visual & Snapshot Testing✓
How do I test a connected component that requires mocked context in Storybook?Advanced Patterns✓
What's the difference between using args versus loaders for providing data to a story?Args & Story Data✓
What's the difference between a decorator and a loader, and when would I use each?Decorators & Setup✓
How do I apply a decorator to just one story, one component, or globally?Decorators & Setup✓
How do I mock network requests in Storybook stories?Mocking & Integration✓

What it can answer

30 coverage checks
66%
Answers 21 of the exam's 30 questionsIt answers 21 questions, 21 more than last time, out of an exam that grew by 30.Nothing it used to answer has stopped working.
▲Accessibility Testing3 / 4
✓Decorators & Setup3 / 3
▲Visual & Snapshot Testing3 / 4
▲Args & Story Data2 / 3
▲Mocking & Integration2 / 3
✓Parameters & Configuration2 / 2
▲Play Functions & Interaction Testing2 / 4
▲Story Organization & Documentation2 / 3
▲Advanced Patterns1 / 2
▲Test Runner & CI Integration1 / 2
exam badge — share this score →

Attacks survived

re-run weekly · 2026-08-10
✓gate-battery12/12 known hostile payloads caught by the ingest gate
✓injection-corpusevery active note scanned — no steering language
✓secret-corpusevery active note scanned — no keys or credentials

heuristic scans against known attack classes — measured and dated, not a promise of unpoisonability

Inside

  • PlanCard component props · args & story data
  • Story updates vs component changes · stories
  • CSF args and controls best practice · args & story data
  • Story variants to cover for PlanCard · stories
  • Minimal component adjustment for storyability · story organization & documentation
  • AlertBanner story args and controls · args & story data
  • AlertBanner story coverage requirements · story organization & documentation
  • Create stories for AlertBanner component · story organization & documentation
  • Storyshots is deprecated · snapshot testing
  • Portable Stories API for snapshot testing · snapshot testing
  • Storybook Test includes Portable Stories configuration · snapshot testing
  • Snapshot testing definition and purpose · snapshot testing
  • When snapshot testing is appropriate · snapshot testing
  • Snapshot testing with Portable Stories process · snapshot testing

Licence

CC BY-NC-SA 4.0

Use it, copy it, build on it, with credit. Selling it is not allowed.