JetEngine Listings callback

Add a Dynamic Field transform through JetEngine's allowlist. Treat the callback as render code: make it deterministic, cheap, and explicit about whether it returns plain text or already-safe HTML.

When to use this skill

• Add a formatter to Dynamic Field's Filter field output control.
• Add callback-specific controls and positional PHP arguments.
• Diagnose a selected callback that yields blank or malformed output.
• Process serialized arrays, chained callbacks, HTML, or zero-valued settings.
• Audit output escaping or N+1 work in Listing Grids.

Preferred registration

Register on jet-engine/callbacks/register. The identifier must pass is_callable() and JetEngine's allowed-callback gate. Use a global function or a fully qualified static callable string.