[wp-trac] [WordPress Trac] #65115: AI Client lacks filters for customizing model selection and generation parameters

[WordPress Trac]

#65115: AI Client lacks filters for customizing model selection and generation
parameters
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 Reporter:  raftaar1191                 |      Owner:  (none)
     Type:  feature request             |     Status:  new
 Priority:  normal                      |  Milestone:  Awaiting Review
Component:  AI                          |    Version:  trunk
 Severity:  normal                      |   Keywords:  needs-patch 2nd-
  Focuses:  accessibility, performance  |  opinion
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 The AI Client in WordPress 7.0 provides very limited filtering
 capabilities for third-party plugin customization.

 == Existing Filters ==

 Currently, only two filters exist:

 * `wp_ai_client_default_request_timeout` (HTTP timeout only)
 * `wp_ai_client_prevent_prompt` (request abort only)

 == Current Limitations ==

 There is currently **no way** for third-party plugins to customize:

 * Model selection per-capability (text generation, image generation,
 vision)
 * Generation parameters:
   * `temperature`
   * `max_tokens`
   * `top_p`
   * `top_k`
   * `presence_penalty`
   * `frequency_penalty`
 * The PSR-14 `BeforeGenerateResultEvent` is read-only and cannot modify
 parameters

 == Impact ==

 This severely limits the ability of plugin developers to build AI-powered
 features with custom behavior and control. Plugin developers cannot:

 * Dynamically select different models based on context or user role
 * Adjust temperature for deterministic vs. creative output
 * Control token limits per-capability or per-context
 * Set request timeouts per-capability
 * Conditionally modify generation parameters based on post type, user
 subscription, or other factors

 == Why This Matters ==

 Without these hooks, developers are forced to use workarounds and cannot
 leverage standard WordPress filter conventions for AI Client
 customization. This limits the extensibility of the AI Client and prevents
 a rich ecosystem of AI-powered plugins from being built.

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Ticket URL: <https://core.trac.wordpress.org/ticket/65115>
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