chore: update OpenAPI spec from monorepo (#312)

Co-authored-by: OpenRouter SDK Bot <sdk-bot@openrouter.ai>

.speakeasy/in.openapi.yaml

@@ -131,15 +131,12 @@ components:
       additionalProperties:
         nullable: true
       description: >-
-        A tool made available to the advisor sub-agent. Accepts function tools and OpenRouter server tools (e.g.
-        openrouter:web_search). The advisor tool may not list itself.
+        A tool made available to the advisor sub-agent. Only OpenRouter server tools (e.g. openrouter:web_search) are
+        supported; function tools are rejected because the advisor has no way to execute them. The advisor tool may not
+        list itself.
       example:
         type: openrouter:web_search
       properties:
-        function:
-          additionalProperties:
-            nullable: true
-          type: object
         parameters:
           additionalProperties:
             nullable: true
@@ -259,7 +256,8 @@ components:
         tools:
           description: >-
             Tools the advisor sub-agent may use while forming its advice. The advisor runs as an agentic sub-agent over
-            these tools, then returns its text. Must not include the advisor tool itself.
+            these tools, then returns its text. Only OpenRouter server tools are supported — function tools are rejected
+            — and the list must not include the advisor tool itself.
           items:
             $ref: '#/components/schemas/AdvisorNestedTool'
           type: array
@@ -4800,6 +4798,7 @@ components:
         - $ref: '#/components/schemas/DatetimeServerTool'
         - $ref: '#/components/schemas/ImageGenerationServerTool_OpenRouter'
         - $ref: '#/components/schemas/ChatSearchModelsServerTool'
+        - $ref: '#/components/schemas/SubagentServerTool_OpenRouter'
         - $ref: '#/components/schemas/WebFetchServerTool'
         - $ref: '#/components/schemas/OpenRouterWebSearchServerTool'
         - $ref: '#/components/schemas/ChatWebSearchShorthand'
@@ -9788,6 +9787,7 @@ components:
               - $ref: '#/components/schemas/OutputMcpServerToolItem'
               - $ref: '#/components/schemas/OutputSearchModelsServerToolItem'
               - $ref: '#/components/schemas/OutputAdvisorServerToolItem'
+              - $ref: '#/components/schemas/OutputSubagentServerToolItem'
               - $ref: '#/components/schemas/LocalShellCallItem'
               - $ref: '#/components/schemas/LocalShellCallOutputItem'
               - $ref: '#/components/schemas/ShellCallItem'
@@ -16073,6 +16073,7 @@ components:
           openrouter:image_generation: '#/components/schemas/OutputImageGenerationServerToolItem'
           openrouter:mcp: '#/components/schemas/OutputMcpServerToolItem'
           openrouter:memory: '#/components/schemas/OutputMemoryServerToolItem'
+          openrouter:subagent: '#/components/schemas/OutputSubagentServerToolItem'
           openrouter:text_editor: '#/components/schemas/OutputTextEditorServerToolItem'
           openrouter:tool_search: '#/components/schemas/OutputToolSearchServerToolItem'
           openrouter:web_fetch: '#/components/schemas/OutputWebFetchServerToolItem'
@@ -16118,6 +16119,7 @@ components:
         - $ref: '#/components/schemas/OutputSearchModelsServerToolItem'
         - $ref: '#/components/schemas/OutputFusionServerToolItem'
         - $ref: '#/components/schemas/OutputAdvisorServerToolItem'
+        - $ref: '#/components/schemas/OutputSubagentServerToolItem'
         - $ref: '#/components/schemas/OutputCustomToolCallItem'
     OutputItemWebSearchCall:
       example:
@@ -16507,6 +16509,40 @@ components:
         - status
         - output
       type: object
+    OutputSubagentServerToolItem:
+      description: An openrouter:subagent server tool output item
+      example:
+        id: st_tmp_abc123
+        status: completed
+        type: openrouter:subagent
+      properties:
+        error:
+          description: Error message when the subagent task did not produce an outcome.
+          type: string
+        id:
+          type: string
+        model:
+          description: Slug of the worker model that executed the task.
+          type: string
+        outcome:
+          description: The worker model's result (the outcome text returned to the delegating model).
+          type: string
+        status:
+          $ref: '#/components/schemas/ToolCallStatus'
+        task_description:
+          description: The task description the delegating model sent to the worker.
+          type: string
+        task_name:
+          description: The short task identifier the delegating model supplied.
+          type: string
+        type:
+          enum:
+            - openrouter:subagent
+          type: string
+      required:
+        - status
+        - type
+      type: object
     OutputTextEditorServerToolItem:
       description: An openrouter:text_editor server tool output item
       example:
@@ -19156,6 +19192,7 @@ components:
               - $ref: '#/components/schemas/ApplyPatchServerTool'
               - $ref: '#/components/schemas/CustomTool'
               - $ref: '#/components/schemas/AdvisorServerTool_OpenRouter'
+              - $ref: '#/components/schemas/SubagentServerTool_OpenRouter'
               - $ref: '#/components/schemas/DatetimeServerTool'
               - $ref: '#/components/schemas/FusionServerTool_OpenRouter'
               - $ref: '#/components/schemas/ImageGenerationServerTool_OpenRouter'
@@ -20062,6 +20099,112 @@ components:
           example: 113
           type: integer
       type: object
+    SubagentNestedTool:
+      additionalProperties:
+        nullable: true
+      description: >-
+        A tool made available to the subagent. Only OpenRouter server tools (e.g. openrouter:web_search) are supported;
+        function tools are rejected because the worker has no way to execute them. The subagent tool may not list
+        itself.
+      example:
+        type: openrouter:web_search
+      properties:
+        parameters:
+          additionalProperties:
+            nullable: true
+          type: object
+        type:
+          type: string
+      required:
+        - type
+      type: object
+    SubagentReasoning:
+      description: >-
+        Reasoning configuration forwarded to the subagent call. Use this to control reasoning effort and token budget
+        for models that support extended thinking.
+      example:
+        effort: low
+      properties:
+        effort:
+          description: Reasoning effort level for the subagent call.
+          enum:
+            - xhigh
+            - high
+            - medium
+            - low
+            - minimal
+            - none
+          type: string
+        max_tokens:
+          description: >-
+            Maximum number of reasoning tokens the subagent may use. Accepted and validated but not yet forwarded to the
+            subagent call.
+          type: integer
+      type: object
+    SubagentServerTool_OpenRouter:
+      description: >-
+        OpenRouter built-in server tool: delegates self-contained tasks to a smaller, cheaper, faster worker model (any
+        OpenRouter model) mid-generation and returns its outcome. The worker may run as a sub-agent with its own tools.
+      example:
+        parameters:
+          model: ~anthropic/claude-haiku-latest
+        type: openrouter:subagent
+      properties:
+        parameters:
+          $ref: '#/components/schemas/SubagentServerToolConfig'
+        type:
+          enum:
+            - openrouter:subagent
+          type: string
+      required:
+        - type
+      type: object
+    SubagentServerToolConfig:
+      description: Configuration for the openrouter:subagent server tool.
+      example:
+        model: ~anthropic/claude-haiku-latest
+      properties:
+        instructions:
+          description: System instructions for the subagent. When omitted, the subagent responds with no system prompt of its own.
+          example: You are a fast, focused worker. Complete the task exactly as described.
+          type: string
+        max_completion_tokens:
+          description: >-
+            Maximum number of output tokens (including reasoning) the subagent may produce. When omitted, the provider's
+            default applies.
+          example: 2048
+          type: integer
+        max_tool_calls:
+          description: >-
+            Maximum number of tool-calling steps the subagent may take during its agentic loop. Capped at 25. Only
+            relevant when the subagent is given tools. Accepted and validated but not yet enforced on the subagent call.
+          example: 5
+          maximum: 25
+          minimum: 1
+          type: integer
+        model:
+          description: >-
+            Slug of the model that executes delegated tasks (any OpenRouter model). Typically a smaller, cheaper, faster
+            model than the one delegating. When omitted, the model from the outer API request is used. The subagent tool
+            itself cannot be the subagent model.
+          example: ~anthropic/claude-haiku-latest
+          type: string
+        reasoning:
+          $ref: '#/components/schemas/SubagentReasoning'
+        temperature:
+          description: Sampling temperature forwarded to the subagent call. When omitted, the provider's default applies.
+          example: 0.7
+          format: double
+          type: number
+        tools:
+          description: >-
+            Tools the subagent may use while executing a delegated task. The subagent runs as an agentic sub-agent over
+            these tools, then returns its outcome. Only OpenRouter server tools are supported — function tools are
+            rejected — and the list must not include the subagent tool itself.
+          items:
+            $ref: '#/components/schemas/SubagentNestedTool'
+          type: array
+      type: object
     TextConfig:
       description: Text output configuration including format and verbosity
       example: