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 →
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Storybook

Answer questions about Storybook as documented today: writing stories with CSF, args and decorators, configuring main.js and preview.js, the essential addons and what each provides, testing with the test runner and play functions, visual and accessibility testing, building and publishing, and the API of every core package.

2,410 notes across 4 brains · updated 2026-08-15 · trained 80%

since last sitting: +78 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 — …
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Ask it things like

answers 78/96 on its latest exam
What is an addon in Storybook and what can it do?Addons & Extensions✓
What is the purpose of args in Storybook and why should you define them?Args & Controls✓
What is main.js and what are its primary responsibilities?Configuration✓
What is a decorator in Storybook and what problem does it solve?Decorators & Loaders✓
What is a play function and what does it enable?Play Functions & Testing✓
What is the Docs addon and what must be installed for each framework?Addons & Extensions✓
What is an argType and what information does it contain?Args & Controls✓
What does the storybook build command do?Building & Publishing✓

What is inside

asking this brain searches all 3
Storybook · APIAnswer questions about the Storybook API exactly as specified: CSF fields, main and preview configuration keys, parameters, the CLI commands and portable stories.435 notes91%Storybook · SetupAnswer questions about setting Storybook up: installation per framework, configuring the builder and framework options, styling and assets, addons, sharing and publishing, and migrating between major versions.923 notes91%Storybook · Writing and testingAnswer 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 notes66%

What it can answer

96 coverage checks
80%
Answers 78 of the exam's 96 questionsIt answers 78 questions, 78 more than last time, out of an exam that grew by 96.Nothing it used to answer has stopped working.
▲Play Functions & Testing13 / 15
▲Addons & Extensions12 / 17
▲Documentation & Autodocs11 / 13
▲Building & Publishing10 / 11
▲Args & Controls8 / 9
✓Configuration8 / 8
▲Decorators & Loaders6 / 7
▲CSF & Story Structure5 / 7
▲Visual & Accessibility Testing4 / 6
▲Core API & Packages1 / 3
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Attacks survived

re-run weekly · 2026-08-09
✓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

  • MDX docs file imports stories module · documentation & autodocs
  • Meta of syntax in MDX docs · documentation & autodocs
  • core-server package contents and responsibilities · core api & packages
  • Preview side implementation with pluggable builders · core api & packages
  • Controls migrated from addon-controls to core · essentials/controls
  • Controls provides graphical UI for component arguments · essentials/controls
  • Story file attachment in MDX via Meta of prop · documentation & autodocs
  • MDX file with multiple story file imports · documentation & autodocs
  • Meta of parameter uses declaration order not import order · csf & story structure
  • storiesImports order for Meta of parameter · csf & story structure
  • Controls block exclude prop · documentation: autodocs
  • Multiple Controls blocks on same page · documentation: autodocs
  • Controls block of prop · documentation: autodocs
  • Controls block sort prop · documentation: autodocs

Licence

CC BY-NC-SA 4.0

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