Create Removal Issue

create-removal-issue

Prerequisites (implicit)

• The migrated Symfony page is GA (stability="stable", state=1) and has been stable for at least one minor release with no P1 regressions.

Instructions

1. Create a GitHub issue with title: Remove deprecated Admin{Domain}sController.
2. Body:

   **Target:** PS X.0
   
   **Context:** The new `{Domain}Controller` (Symfony) is GA since PS W.V (PR #YYYYY).
   
   **Prerequisites:**
   - [ ] GA page has been stable for ≥1 minor release with no P1 regressions
   - [ ] Migration guide published (release notes / dev blog)
   - [ ] All known modules updated (verify with ecosystem team)
   
   **Files to delete:**
   - `controllers/admin/Admin{Domain}sController.php`
   - Legacy-only service registrations referencing this controller
   
   **Files to update:**
   - Remove `_legacy_feature_flag: {domain}` from routing YAML once the flag entry itself is dropped
   - Clean up `feature_flag.xml` entry if no longer needed
   

3. Assign to the team's major release milestone.
4. Tag with: major-release, legacy-cleanup.

Rules

Conventions (timing, reference GA PR) are in Migration/CONTEXT.md. Skill-specific reminders:

• The _legacy_controller: Admin{Domain}s attribute on routes is kept (preserves URL compatibility for legacy admin links) — do not list it as a "file to update"
• Never create a PR for removal until all prerequisites in the issue are checked