fix(genkit-tools/generate): Make model optional (#3918)

Co-authored-by: Pavel Jbanov <pavelgj@gmail.com>

Author: ssbushi

genkit-tools/common/src/types/model.ts

@@ -372,7 +372,7 @@ export const GenerateActionOutputConfig = z.object({
 
 export const GenerateActionOptionsSchema = z.object({
  /** A model name (e.g. `vertexai/gemini-1.0-pro`). */
- model: z.string(),
+ model: z.string().optional(),
  /** Retrieved documents to be used as context for this generation. */
  docs: z.array(DocumentDataSchema).optional(),
  /** Conversation history for multi-turn prompting when supported by the underlying model. */

genkit-tools/genkit-schema.json

@@ -469,7 +469,6 @@
  }
  },
  "required": [
- "model",
  "messages"
  ],
  "additionalProperties": false

py/packages/genkit/src/genkit/core/typing.py

@@ -951,7 +951,7 @@ class GenerateActionOptions(BaseModel):
  """Model for generateactionoptions data."""
 
  model_config = ConfigDict(extra='forbid', populate_by_name=True)
- model: str
+ model: str | None = None
  docs: list[DocumentData] | None = None
  messages: list[Message]
  tools: list[str] | None = None