feat: Generate MyAccount API assets

[agiannelli-auth0]

Description

This PR begins the process of implementing MyAccount API in Mintlify.

Changes:

• Updated script to:
  • add code snippets to myaccount-oas leveraging @fern-api/auth0-myaccount-snippets
  • more accurately generate mdx files & tree in docs.json
  • properly register openapi spec
• First run of the script to generate MyAccount API pages

References

https://auth0team.atlassian.net/browse/DM-289

Testing

Video of local MyAccount API running

Screen.Recording.2026-02-20.at.2.15.27.PM.mov

Video of MyAccount API proxied through docs-backend with docs_explorer_mintlify_myaccount_enabled FF on and off. Flag is initially off and you see the v1 experience. With the flag on, you see the v2 experience
NOTE: This video was take prior to some additional work on the MyAccount pages themselves. Reference video above for latest look & feel.

Screen.Recording.2026-02-19.at.4.34.28.PM.mov

Checklist

• I've read and followed CONTRIBUTING.md.
• I've tested the site build for this change locally.
• I've made appropriate docs updates for any code or config changes.
• I've coordinated with the Product Docs and/or Docs Management team about non-trivial changes.

[nlucero]

Question: I noticed this points to a file that doesn't exist (myaccount-api-oas.fr-ca.json). My understanding is that we do not have French nor Japanese translations yet, but shouldn't this point to the English OAS (myaccount-api-oas.json) in the meantime?

[agiannelli-auth0]

Good catch! I wonder if this is what is causing the not found errors 🤔 I will modify the script to check for the existence of a languaged oas before assigning to the page.

[nlucero]

Question: Are there any tests for this script that we need to add/update to reflect these changes?

[agiannelli-auth0]

You read my mind! I realized last night that I did not update test coverage. I will work on that this morning 👍

[nlucero]

⚠️ I noticed the following errors in the console, though the pages load up fine.

These are probably SSR errors. Did you check the browser console when rendering these pages? Did you see any similar errors?

[agiannelli-auth0]

⚠️ I noticed the following errors in the console, though the pages load up fine.

These are probably SSR errors. Did you check the browser console when rendering these pages? Did you see any similar errors?

I see this error in the browser console:

Error: A listener indicated an asynchronous response by returning true, but the message channel closed before a response was received

This is likely something internal to Mintlify that I will need to ask them about.

[agiannelli-auth0]

@nlucero I don't know that the console errors are related to this, but I am still trying to identify a root cause and see if I can address.

[agiannelli-auth0]

@nlucero I don't know that the console errors are related to this, but I am still trying to identify a root cause and see if I can address.

This issue is fixed.