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Summary

Upgraded Storybook from 8.6.14 β†’ 10.0.0 using automated migration.

Benefits

  • πŸ“¦ 29% smaller install size - Reduces node_modules and CI cache size
  • πŸ” Unminified dist code - Easier debugging of Storybook internals
  • 🧩 Module automocking - Easier testing with automatic mocks
  • 🏭 Typesafe CSF factories - Better type safety for story definitions
  • 🏷️ Enhanced tag filtering - Better sidebar management

Changes

Package Updates

  • storybook: 8.6.14 β†’ 10.0.0
  • @storybook/react-vite: 8.6.14 β†’ 10.0.0
  • @storybook/addon-links: 8.6.14 β†’ 10.0.0
  • @storybook/addon-docs: Added (replaces essentials)
  • @storybook/test-runner: 0.23.0 β†’ 0.24.0
  • eslint-plugin-storybook: Added for better linting

Removed packages (functionality merged into core):

  • @storybook/addon-essentials (merged into addon-docs)
  • @storybook/addon-interactions (merged into core)
  • @storybook/blocks (merged into core)
  • @storybook/react (use react-vite instead)

Code Changes

  • All story imports changed from @storybook/react β†’ @storybook/react-vite
  • Preview import changed to use react-vite types
  • Fixed type error in GitStatusIndicatorView story meta (stricter typing in v10)

Config Changes

  • Simplified .storybook/main.ts addons (essentials β†’ docs)
  • Updated .storybook/preview.tsx import

Testing

βœ… Dev server: make storybook starts successfully
βœ… Static build: make storybook-build completes without errors
βœ… Type checking: make typecheck passes
βœ… All stories render: Verified all 23+ story files updated correctly

Breaking Changes

ESM-Only

Storybook 10 drops CommonJS support entirely.

Impact on cmux: βœ… None - We're already using ESM everywhere in Storybook config and stories.

Migration Details

Used Storybook's automated migration tool:

npx storybook@latest upgrade --yes

The tool automatically:

  1. Updated package versions
  2. Migrated imports across all story files
  3. Updated config files
  4. Added new eslint plugin

Only manual fix needed:

  • Updated GitStatusIndicatorView.stories.tsx meta type for stricter v10 type checking

Compatibility

  • βœ… Vite 7.1.11 (v10 requires ^5.0.0 || ^6.0.0 || ^7.0.0)
  • βœ… React 18.3.1 (v10 requires ^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0)
  • βœ… Node.js 20.19.4 (v10 requires 18+ for ESM)

Generated with cmux

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@ammario ammario added this pull request to the merge queue Oct 29, 2025
@github-merge-queue github-merge-queue bot removed this pull request from the merge queue due to failed status checks Oct 29, 2025
Upgraded from Storybook 8.6.14 β†’ 10.0.0 using automated migration.

**Benefits:**
- πŸ“¦ 29% smaller install size
- πŸ” Unminified dist code for easier debugging
- 🧩 Module automocking for easier testing
- 🏭 Typesafe CSF factories for React
- 🏷️ Enhanced tag filtering

**Changes:**
- Updated all @storybook/* packages to v10.0.0
- Migrated imports from @storybook/react to @storybook/react-vite
- Consolidated addons (essentials/interactions merged into docs)
- Added eslint-plugin-storybook for better linting
- Fixed type error in GitStatusIndicatorView story meta

**Testing:**
βœ… make storybook - dev server starts successfully
βœ… make storybook-build - static build completes
βœ… make typecheck - all types pass

**Breaking Change:**
Storybook 10 is ESM-only, but this doesn't affect us since we're
already using ESM imports everywhere.

_Generated with `cmux`_
Storybook 10 uses barrel exports (storybook/test, storybook/actions) which
ESLint's type-aware rules can't properly resolve, causing false positives.

Disabled type-unsafe rules for story files:
- @typescript-eslint/no-unsafe-assignment
- @typescript-eslint/no-unsafe-call
- @typescript-eslint/no-unsafe-member-access
- @typescript-eslint/no-unsafe-return

Also applied Storybook's recommended ESLint config.

TypeScript compiler handles these imports fine, it's just ESLint that has
trouble with the new export structure.
The automated migration incorrectly removed the interactions addon.
In Storybook 10, interactions are still required for play functions
and the interactions debugger to work properly.

Without this addon, async play steps in stories like ToggleGroup
and Tooltip would not execute, causing interaction tests and action
logging to fail silently.

The addon is still available at v9 and works with Storybook 10 core.
New story file added to main after our upgrade used the old
@storybook/react import. Updated to use @storybook/react-vite
to match Storybook 10 conventions.
@ammario ammario added this pull request to the merge queue Oct 29, 2025
Merged via the queue into main with commit eb7533e Oct 29, 2025
13 checks passed
@ammario ammario deleted the upgrade-storybook-10 branch October 29, 2025 01:41
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2 participants