[josbeir]

FormCompose discovery currently forces _cake_core_, bypassing CakePHP 6's dedicated attribute metadata cache. Use the application's _cake_attributes_ cache in production so its configured PhpEngine can load metadata through OPcache.

Disable persistent caching in debug mode and source-file validation by default. Preserve application-supplied resolver settings in both modes. Keep the merged src/Form/ discovery paths, including application types under src/Form/Field/, and update the configuration example and deployment clear/warm instructions.

Aligns with cakephp/app#1109.

Validation:

• composer validate --strict and composer check: 686 PHP tests, 2525 assertions; analysis, lint, Rector, and formatting pass.
• Xdebug coverage: 99.79% (1946/1950 lines); coverage gate passes.
• Browser suite: 24 tests pass.
• npm ci and the production docs build pass.
• Production/debug defaults, application overrides, and discovery write/read/clear use a real PhpEngine in regression tests.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.81%. Comparing base (efdfa6d) to head (b451b2d).

Additional details and impacted files

@@            Coverage Diff            @@
##               main      #28   +/-   ##
=========================================
  Coverage     99.81%   99.81%           
- Complexity      813      814    +1     
=========================================
  Files            88       88           
  Lines          2146     2146           
=========================================
  Hits           2142     2142           
  Misses            4        4           

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