fix: render n prompt metadata along with generateoptions

Author: MichaelDoyle

js/ai/src/generate.ts

@@ -170,6 +170,12 @@ export interface GenerateOptions<
   context?: ActionContext;
   /** Abort signal for the generate request. */
   abortSignal?: AbortSignal;
+  /**
+   * Additional metadata describing the GenerateOptions, used by tooling. If
+   * this is an instance of a rendered dotprompt, will contain any prompt
+   * metadata contained in the original frontmatter.
+   **/
+  metadata?: Record<string, any>;
 }
 
 export async function toGenerateRequest(

js/ai/src/prompt.ts

@@ -330,6 +330,11 @@ function definePromptAsync<
             ...resolvedOptions?.config,
             ...renderOptions?.config,
           },
+          metadata: resolvedOptions.metadata?.metadata
+            ? {
+                prompt: resolvedOptions.metadata?.metadata,
+              }
+            : undefined,
         });
         // if config is empty and it was not explicitly passed in, we delete it, don't want {}
         if (Object.keys(opts.config).length === 0 && !renderOptions?.config) {
@@ -842,6 +847,7 @@ function loadPrompt(
             ...promptMetadata,
             template: parsedPrompt.template,
           },
+          metadata: { ...promptMetadata.raw?.['metadata'] },
         },
         maxTurns: promptMetadata.raw?.['maxTurns'],
         toolChoice: promptMetadata.raw?.['toolChoice'],