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docs: Extra 2.x to 3.x compatibility checklist (#301) - #626

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docs: Extra 2.x to 3.x compatibility checklist (#301)#626
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Ibochkarev:docs/issue-301-extra-compat-3x

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Description

New page for Extra authors updating packages from MODX 2.x to 3.x (issue asked for a package counterpart to the core upgrade docs).

  • Checklist: class names, processors, xPDO/bootstrap.php, menus (modAction gone), manager JS, HTTP client, build
  • Collections-style example (namespaced extends, drop old require_once, resource processor classes), based on modx.pro/development/19429 / theboxer notes
  • Linked from upgrading-to-3.0 index and breaking-changes (EN + RU)

Affected versions

  • 3.x

Relevant issues

Fixes #301

Author-facing page under upgrading-to-3.0 with Collection-style
examples and links to class names, processors, xPDO, and menus.
@Ibochkarev
Ibochkarev requested a review from Mark-H September 3, 2026 05:45
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New documentation page for 2.x->3.x extra compability update

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