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[material_ui, cupertino_ui] Deprecate Material and Cupertino #191230

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@justinmc

The material.dart and cupertino.dart libraries should be deprecated in order to communicate to users that they are no longer supported and that users should migrate to material_ui and cupertino_ui.

In addition to the main libraries, anything else related to them should be deprecated as well, such as:

Activity

  1. added
    in triagePresently being triaged by the triage team
    p: material_uimaterial_ui package in flutter/packages
    p: cupertino_uicupertino_ui package in flutter/packages
    packageflutter/packages repository. See also p: labels.
    team-designOwned by Design Languages team
    c: proposalA detailed proposal for a change to Flutter
    and removed
    in triagePresently being triaged by the triage team
    on Aug 18, 2026
  2. added
    P1High-priority issues at the top of the work list
    and removed
    team-designOwned by Design Languages team
    p: material_uimaterial_ui package in flutter/packages
    p: cupertino_uicupertino_ui package in flutter/packages
    packageflutter/packages repository. See also p: labels.
    on Aug 19, 2026
  3. self-assigned this
    on Sep 21, 2026
  4. justinmc commented on Sep 21, 2026

    @justinmc
    ContributorAuthor

    Closing this and merging with #172942

  5. github-actions commented on Oct 5, 2026

    @github-actions

    This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.

  6. locked as resolved and limited conversation to collaborators on Oct 5, 2026
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P1High-priority issues at the top of the work listc: proposalA detailed proposal for a change to Flutterteam-frameworkOwned by Framework teamtriaged-frameworkTriaged by Framework team

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