addon-storysource does not capture stories written in StoryObj (CSF v3)

[lacolaco]

Describe the bug

addon-storysource does not capture the information of stories written in CSF v3.

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System
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Environment Info:

  System:
    OS: macOS 11.6.4
    CPU: (8) x64 Intel(R) Core(TM) i7-8569U CPU @ 2.80GHz
  Binaries:
    Node: 14.19.0 - ~/.nodebrew/current/bin/node
    Yarn: 1.22.15 - ~/.nodebrew/current/bin/yarn
    npm: 7.14.0 - ~/Works/xxxx/node_modules/.bin/npm
  npmPackages:
    @storybook/addon-essentials: 6.4.21 => 6.4.21 
    @storybook/addon-interactions: 6.4.21 => 6.4.21 
    @storybook/addon-storysource: 6.4.21 => 6.4.21 
    @storybook/addons: 6.4.21 => 6.4.21 
    @storybook/angular: 6.4.21 => 6.4.21 
    @storybook/builder-webpack5: 6.4.21 => 6.4.21 
    @storybook/cli: 6.4.21 => 6.4.21 
    @storybook/jest: 0.0.10 => 0.0.10 
    @storybook/manager-webpack5: 6.4.21 => 6.4.21 
    @storybook/preset-scss: 1.0.3 => 1.0.3 
    @storybook/testing-library: 0.0.9 => 0.0.9 

Additional context
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[daneah]

This still appears to be the case in 6.5.9.

More broadly, I have seen @shilman suggest not using addon-storysource and the addon is not mentioned in a first-class way in the official docs. I'm curious if there's a sentiment that we should forego it in favor of doc blocks (which do work great with CSF 3)?

[shilman]

@daneah FWIW I recently updated doc blocks to use a csf-plugin #19680, which will allow us to move both source-loader and addon-storysource out of the monorepo. I'm hoping to also create an addon based on the same underlying code as doc blocks that shows up next to your story in the addon panel, but don't have a timeline for that