Expose queue_validator via WP-CLI command

[saraichinwag]

Problem

The QueueValidator tool is only available inside AI pipelines (registered via registerGlobalTool). When agents or humans need to validate topics from the CLI — e.g. during quiz/content ideation sessions — there's no way to call it.

I hit this today during quiz ideation: the task instructions said to use queue_validator for each candidate, but it's not callable from WP-CLI. Had to fall back to manual cross-referencing.

Proposed Solution

Add a WP-CLI subcommand that wraps QueueValidator::validate():

wp datamachine queue validate "Topic Title" --post_type=quiz --flow_id=48 --threshold=0.65

Output:

• clear — no duplicates found
• duplicate — shows match details (source, title, similarity score)

The validate() method is already cleanly factored out as a public method, separate from the AI tool wrapper. This should be a thin CLI command that passes args through.

Parameters

Flag	Required	Default	Description
<topic>	yes	—	Topic/title to validate
--post_type	no	post	Post type to check against
--flow_id	no	—	Flow ID for queue checking
--threshold	no	0.65	Jaccard similarity threshold

Nice-to-have

• Also register as a WordPress Ability so it's accessible from the Abilities API too
• --format=json output option for scripting

Context

QueueValidator lives at inc/Engine/AI/Tools/Global/QueueValidator.php. The validate() method already returns structured results — just needs a CLI entry point.