# Messages ## List Messages For Step `client.steps.messages.list(stringstepID, MessageListParamsquery?, RequestOptionsoptions?): ArrayPage` **get** `/v1/steps/{step_id}/messages` List messages for a given step. ### Parameters - `stepID: string` The ID of the step in the format 'step-' - `query: MessageListParams` - `after?: string | null` Cursor for pagination (message ID). Returns results relative to this ID in the specified sort order. Expected format: 'message-' - `before?: string | null` Cursor for pagination (message ID). Returns results relative to this ID in the specified sort order. Expected format: 'message-' - `limit?: number | null` Maximum number of messages to return - `order?: "asc" | "desc"` Sort order for messages by creation time. 'asc' for oldest first, 'desc' for newest first - `"asc"` - `"desc"` - `order_by?: "created_at"` Sort by field - `"created_at"` ### Returns - `MessageListResponse = SystemMessage | UserMessage | ReasoningMessage | 8 more` A message generated by the system. Never streamed back on a response, only used for cursor pagination. Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message content (str): The message content sent by the system - `SystemMessage` A message generated by the system. Never streamed back on a response, only used for cursor pagination. Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message content (str): The message content sent by the system - `id: string` - `content: string` The message content sent by the system - `date: string` - `is_err?: boolean | null` - `message_type?: "system_message"` The type of the message. - `"system_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `step_id?: string | null` - `UserMessage` A message sent by the user. Never streamed back on a response, only used for cursor pagination. Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message content (Union[str, List[LettaUserMessageContentUnion]]): The message content sent by the user (can be a string or an array of multi-modal content parts) - `id: string` - `content: Array | string` The message content sent by the user (can be a string or an array of multi-modal content parts) - `Array` - `TextContent` - `text: string` The text content of the message. - `signature?: string | null` Stores a unique identifier for any reasoning associated with this text content. - `type?: "text"` The type of the message. - `"text"` - `ImageContent` - `source: URLImage | Base64Image | LettaImage` The source of the image. - `URLImage` - `url: string` The URL of the image. - `type?: "url"` The source type for the image. - `"url"` - `Base64Image` - `data: string` The base64 encoded image data. - `media_type: string` The media type for the image. - `detail?: string | null` What level of detail to use when processing and understanding the image (low, high, or auto to let the model decide) - `type?: "base64"` The source type for the image. - `"base64"` - `LettaImage` - `file_id: string` The unique identifier of the image file persisted in storage. - `data?: string | null` The base64 encoded image data. - `detail?: string | null` What level of detail to use when processing and understanding the image (low, high, or auto to let the model decide) - `media_type?: string | null` The media type for the image. - `type?: "letta"` The source type for the image. - `"letta"` - `type?: "image"` The type of the message. - `"image"` - `string` - `date: string` - `is_err?: boolean | null` - `message_type?: "user_message"` The type of the message. - `"user_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `step_id?: string | null` - `ReasoningMessage` Representation of an agent's internal reasoning. Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message source (Literal["reasoner_model", "non_reasoner_model"]): Whether the reasoning content was generated natively by a reasoner model or derived via prompting reasoning (str): The internal reasoning of the agent signature (Optional[str]): The model-generated signature of the reasoning step - `id: string` - `date: string` - `reasoning: string` - `is_err?: boolean | null` - `message_type?: "reasoning_message"` The type of the message. - `"reasoning_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `signature?: string | null` - `source?: "reasoner_model" | "non_reasoner_model"` - `"reasoner_model"` - `"non_reasoner_model"` - `step_id?: string | null` - `HiddenReasoningMessage` Representation of an agent's internal reasoning where reasoning content has been hidden from the response. Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message state (Literal["redacted", "omitted"]): Whether the reasoning content was redacted by the provider or simply omitted by the API hidden_reasoning (Optional[str]): The internal reasoning of the agent - `id: string` - `date: string` - `state: "redacted" | "omitted"` - `"redacted"` - `"omitted"` - `hidden_reasoning?: string | null` - `is_err?: boolean | null` - `message_type?: "hidden_reasoning_message"` The type of the message. - `"hidden_reasoning_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `step_id?: string | null` - `ToolCallMessage` A message representing a request to call a tool (generated by the LLM to trigger tool execution). Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message tool_call (Union[ToolCall, ToolCallDelta]): The tool call - `id: string` - `date: string` - `tool_call: ToolCall | ToolCallDelta` - `ToolCall` - `arguments: string` - `name: string` - `tool_call_id: string` - `ToolCallDelta` - `arguments?: string | null` - `name?: string | null` - `tool_call_id?: string | null` - `is_err?: boolean | null` - `message_type?: "tool_call_message"` The type of the message. - `"tool_call_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `step_id?: string | null` - `tool_calls?: Array | ToolCallDelta | null` - `Array` - `arguments: string` - `name: string` - `tool_call_id: string` - `ToolCallDelta` - `ToolReturnMessage` A message representing the return value of a tool call (generated by Letta executing the requested tool). Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message tool_return (str): The return value of the tool (deprecated, use tool_returns) status (Literal["success", "error"]): The status of the tool call (deprecated, use tool_returns) tool_call_id (str): A unique identifier for the tool call that generated this message (deprecated, use tool_returns) stdout (Optional[List(str)]): Captured stdout (e.g. prints, logs) from the tool invocation (deprecated, use tool_returns) stderr (Optional[List(str)]): Captured stderr from the tool invocation (deprecated, use tool_returns) tool_returns (Optional[List[ToolReturn]]): List of tool returns for multi-tool support - `id: string` - `date: string` - `status: "success" | "error"` - `"success"` - `"error"` - `tool_call_id: string` - `tool_return: string` - `is_err?: boolean | null` - `message_type?: "tool_return_message"` The type of the message. - `"tool_return_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `stderr?: Array | null` - `stdout?: Array | null` - `step_id?: string | null` - `tool_returns?: Array | null` - `status: "success" | "error"` - `"success"` - `"error"` - `tool_call_id: string` - `tool_return: Array | string` The tool return value - either a string or list of content parts (text/image) - `Array` - `TextContent` - `ImageContent` - `string` - `stderr?: Array | null` - `stdout?: Array | null` - `type?: "tool"` The message type to be created. - `"tool"` - `AssistantMessage` A message sent by the LLM in response to user input. Used in the LLM context. Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message content (Union[str, List[LettaAssistantMessageContentUnion]]): The message content sent by the agent (can be a string or an array of content parts) - `id: string` - `content: Array | string` The message content sent by the agent (can be a string or an array of content parts) - `Array` - `text: string` The text content of the message. - `signature?: string | null` Stores a unique identifier for any reasoning associated with this text content. - `type?: "text"` The type of the message. - `"text"` - `string` - `date: string` - `is_err?: boolean | null` - `message_type?: "assistant_message"` The type of the message. - `"assistant_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `step_id?: string | null` - `ApprovalRequestMessage` A message representing a request for approval to call a tool (generated by the LLM to trigger tool execution). Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message tool_call (ToolCall): The tool call - `id: string` - `date: string` - `tool_call: ToolCall | ToolCallDelta` The tool call that has been requested by the llm to run - `ToolCall` - `ToolCallDelta` - `is_err?: boolean | null` - `message_type?: "approval_request_message"` The type of the message. - `"approval_request_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `step_id?: string | null` - `tool_calls?: Array | ToolCallDelta | null` The tool calls that have been requested by the llm to run, which are pending approval - `Array` - `arguments: string` - `name: string` - `tool_call_id: string` - `ToolCallDelta` - `ApprovalResponseMessage` A message representing a response form the user indicating whether a tool has been approved to run. Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message approve: (bool) Whether the tool has been approved approval_request_id: The ID of the approval request reason: (Optional[str]) An optional explanation for the provided approval status - `id: string` - `date: string` - `approval_request_id?: string | null` The message ID of the approval request - `approvals?: Array | null` The list of approval responses - `ApprovalReturn` - `approve: boolean` Whether the tool has been approved - `tool_call_id: string` The ID of the tool call that corresponds to this approval - `reason?: string | null` An optional explanation for the provided approval status - `type?: "approval"` The message type to be created. - `"approval"` - `ToolReturn` - `status: "success" | "error"` - `tool_call_id: string` - `tool_return: Array | string` The tool return value - either a string or list of content parts (text/image) - `stderr?: Array | null` - `stdout?: Array | null` - `type?: "tool"` The message type to be created. - `approve?: boolean | null` Whether the tool has been approved - `is_err?: boolean | null` - `message_type?: "approval_response_message"` The type of the message. - `"approval_response_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `reason?: string | null` An optional explanation for the provided approval status - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `step_id?: string | null` - `SummaryMessage` A message representing a summary of the conversation. Sent to the LLM as a user or system message depending on the provider. - `id: string` - `date: string` - `summary: string` - `compaction_stats?: CompactionStats | null` Statistics about a memory compaction operation. - `context_window: number` The model's context window size - `messages_count_after: number` Number of messages after compaction - `messages_count_before: number` Number of messages before compaction - `trigger: string` What triggered the compaction (e.g., 'context_window_exceeded', 'post_step_context_check') - `context_tokens_after?: number | null` Token count after compaction (message tokens only, does not include tool definitions) - `context_tokens_before?: number | null` Token count before compaction (from LLM usage stats, includes full context sent to LLM) - `is_err?: boolean | null` - `message_type?: "summary_message"` - `"summary_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `step_id?: string | null` - `EventMessage` A message for notifying the developer that an event that has occured (e.g. a compaction). Events are NOT part of the context window. - `id: string` - `date: string` - `event_data: Record` - `event_type: "compaction"` - `"compaction"` - `is_err?: boolean | null` - `message_type?: "event_message"` - `"event_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `step_id?: string | null` ### Example ```typescript import Letta from '@letta-ai/letta-client'; const client = new Letta({ apiKey: process.env['LETTA_API_KEY'], // This is the default and can be omitted }); // Automatically fetches more pages as needed. for await (const messageListResponse of client.steps.messages.list( 'step-123e4567-e89b-42d3-8456-426614174000', )) { console.log(messageListResponse); } ``` #### Response ```json [ { "id": "id", "content": "content", "date": "2019-12-27T18:11:19.117Z", "is_err": true, "message_type": "system_message", "name": "name", "otid": "otid", "run_id": "run_id", "sender_id": "sender_id", "seq_id": 0, "step_id": "step_id" } ] ``` ## Domain Types ### Message List Response - `MessageListResponse = SystemMessage | UserMessage | ReasoningMessage | 8 more` A message generated by the system. Never streamed back on a response, only used for cursor pagination. Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message content (str): The message content sent by the system - `SystemMessage` A message generated by the system. Never streamed back on a response, only used for cursor pagination. Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message content (str): The message content sent by the system - `id: string` - `content: string` The message content sent by the system - `date: string` - `is_err?: boolean | null` - `message_type?: "system_message"` The type of the message. - `"system_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `step_id?: string | null` - `UserMessage` A message sent by the user. Never streamed back on a response, only used for cursor pagination. Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message content (Union[str, List[LettaUserMessageContentUnion]]): The message content sent by the user (can be a string or an array of multi-modal content parts) - `id: string` - `content: Array | string` The message content sent by the user (can be a string or an array of multi-modal content parts) - `Array` - `TextContent` - `text: string` The text content of the message. - `signature?: string | null` Stores a unique identifier for any reasoning associated with this text content. - `type?: "text"` The type of the message. - `"text"` - `ImageContent` - `source: URLImage | Base64Image | LettaImage` The source of the image. - `URLImage` - `url: string` The URL of the image. - `type?: "url"` The source type for the image. - `"url"` - `Base64Image` - `data: string` The base64 encoded image data. - `media_type: string` The media type for the image. - `detail?: string | null` What level of detail to use when processing and understanding the image (low, high, or auto to let the model decide) - `type?: "base64"` The source type for the image. - `"base64"` - `LettaImage` - `file_id: string` The unique identifier of the image file persisted in storage. - `data?: string | null` The base64 encoded image data. - `detail?: string | null` What level of detail to use when processing and understanding the image (low, high, or auto to let the model decide) - `media_type?: string | null` The media type for the image. - `type?: "letta"` The source type for the image. - `"letta"` - `type?: "image"` The type of the message. - `"image"` - `string` - `date: string` - `is_err?: boolean | null` - `message_type?: "user_message"` The type of the message. - `"user_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `step_id?: string | null` - `ReasoningMessage` Representation of an agent's internal reasoning. Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message source (Literal["reasoner_model", "non_reasoner_model"]): Whether the reasoning content was generated natively by a reasoner model or derived via prompting reasoning (str): The internal reasoning of the agent signature (Optional[str]): The model-generated signature of the reasoning step - `id: string` - `date: string` - `reasoning: string` - `is_err?: boolean | null` - `message_type?: "reasoning_message"` The type of the message. - `"reasoning_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `signature?: string | null` - `source?: "reasoner_model" | "non_reasoner_model"` - `"reasoner_model"` - `"non_reasoner_model"` - `step_id?: string | null` - `HiddenReasoningMessage` Representation of an agent's internal reasoning where reasoning content has been hidden from the response. Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message state (Literal["redacted", "omitted"]): Whether the reasoning content was redacted by the provider or simply omitted by the API hidden_reasoning (Optional[str]): The internal reasoning of the agent - `id: string` - `date: string` - `state: "redacted" | "omitted"` - `"redacted"` - `"omitted"` - `hidden_reasoning?: string | null` - `is_err?: boolean | null` - `message_type?: "hidden_reasoning_message"` The type of the message. - `"hidden_reasoning_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `step_id?: string | null` - `ToolCallMessage` A message representing a request to call a tool (generated by the LLM to trigger tool execution). Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message tool_call (Union[ToolCall, ToolCallDelta]): The tool call - `id: string` - `date: string` - `tool_call: ToolCall | ToolCallDelta` - `ToolCall` - `arguments: string` - `name: string` - `tool_call_id: string` - `ToolCallDelta` - `arguments?: string | null` - `name?: string | null` - `tool_call_id?: string | null` - `is_err?: boolean | null` - `message_type?: "tool_call_message"` The type of the message. - `"tool_call_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `step_id?: string | null` - `tool_calls?: Array | ToolCallDelta | null` - `Array` - `arguments: string` - `name: string` - `tool_call_id: string` - `ToolCallDelta` - `ToolReturnMessage` A message representing the return value of a tool call (generated by Letta executing the requested tool). Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message tool_return (str): The return value of the tool (deprecated, use tool_returns) status (Literal["success", "error"]): The status of the tool call (deprecated, use tool_returns) tool_call_id (str): A unique identifier for the tool call that generated this message (deprecated, use tool_returns) stdout (Optional[List(str)]): Captured stdout (e.g. prints, logs) from the tool invocation (deprecated, use tool_returns) stderr (Optional[List(str)]): Captured stderr from the tool invocation (deprecated, use tool_returns) tool_returns (Optional[List[ToolReturn]]): List of tool returns for multi-tool support - `id: string` - `date: string` - `status: "success" | "error"` - `"success"` - `"error"` - `tool_call_id: string` - `tool_return: string` - `is_err?: boolean | null` - `message_type?: "tool_return_message"` The type of the message. - `"tool_return_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `stderr?: Array | null` - `stdout?: Array | null` - `step_id?: string | null` - `tool_returns?: Array | null` - `status: "success" | "error"` - `"success"` - `"error"` - `tool_call_id: string` - `tool_return: Array | string` The tool return value - either a string or list of content parts (text/image) - `Array` - `TextContent` - `ImageContent` - `string` - `stderr?: Array | null` - `stdout?: Array | null` - `type?: "tool"` The message type to be created. - `"tool"` - `AssistantMessage` A message sent by the LLM in response to user input. Used in the LLM context. Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message content (Union[str, List[LettaAssistantMessageContentUnion]]): The message content sent by the agent (can be a string or an array of content parts) - `id: string` - `content: Array | string` The message content sent by the agent (can be a string or an array of content parts) - `Array` - `text: string` The text content of the message. - `signature?: string | null` Stores a unique identifier for any reasoning associated with this text content. - `type?: "text"` The type of the message. - `"text"` - `string` - `date: string` - `is_err?: boolean | null` - `message_type?: "assistant_message"` The type of the message. - `"assistant_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `step_id?: string | null` - `ApprovalRequestMessage` A message representing a request for approval to call a tool (generated by the LLM to trigger tool execution). Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message tool_call (ToolCall): The tool call - `id: string` - `date: string` - `tool_call: ToolCall | ToolCallDelta` The tool call that has been requested by the llm to run - `ToolCall` - `ToolCallDelta` - `is_err?: boolean | null` - `message_type?: "approval_request_message"` The type of the message. - `"approval_request_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `step_id?: string | null` - `tool_calls?: Array | ToolCallDelta | null` The tool calls that have been requested by the llm to run, which are pending approval - `Array` - `arguments: string` - `name: string` - `tool_call_id: string` - `ToolCallDelta` - `ApprovalResponseMessage` A message representing a response form the user indicating whether a tool has been approved to run. Args: id (str): The ID of the message date (datetime): The date the message was created in ISO format name (Optional[str]): The name of the sender of the message approve: (bool) Whether the tool has been approved approval_request_id: The ID of the approval request reason: (Optional[str]) An optional explanation for the provided approval status - `id: string` - `date: string` - `approval_request_id?: string | null` The message ID of the approval request - `approvals?: Array | null` The list of approval responses - `ApprovalReturn` - `approve: boolean` Whether the tool has been approved - `tool_call_id: string` The ID of the tool call that corresponds to this approval - `reason?: string | null` An optional explanation for the provided approval status - `type?: "approval"` The message type to be created. - `"approval"` - `ToolReturn` - `status: "success" | "error"` - `tool_call_id: string` - `tool_return: Array | string` The tool return value - either a string or list of content parts (text/image) - `stderr?: Array | null` - `stdout?: Array | null` - `type?: "tool"` The message type to be created. - `approve?: boolean | null` Whether the tool has been approved - `is_err?: boolean | null` - `message_type?: "approval_response_message"` The type of the message. - `"approval_response_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `reason?: string | null` An optional explanation for the provided approval status - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `step_id?: string | null` - `SummaryMessage` A message representing a summary of the conversation. Sent to the LLM as a user or system message depending on the provider. - `id: string` - `date: string` - `summary: string` - `compaction_stats?: CompactionStats | null` Statistics about a memory compaction operation. - `context_window: number` The model's context window size - `messages_count_after: number` Number of messages after compaction - `messages_count_before: number` Number of messages before compaction - `trigger: string` What triggered the compaction (e.g., 'context_window_exceeded', 'post_step_context_check') - `context_tokens_after?: number | null` Token count after compaction (message tokens only, does not include tool definitions) - `context_tokens_before?: number | null` Token count before compaction (from LLM usage stats, includes full context sent to LLM) - `is_err?: boolean | null` - `message_type?: "summary_message"` - `"summary_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `step_id?: string | null` - `EventMessage` A message for notifying the developer that an event that has occured (e.g. a compaction). Events are NOT part of the context window. - `id: string` - `date: string` - `event_data: Record` - `event_type: "compaction"` - `"compaction"` - `is_err?: boolean | null` - `message_type?: "event_message"` - `"event_message"` - `name?: string | null` - `otid?: string | null` The offline threading id (OTID). Set by the client to deduplicate requests. Used for idempotency in background streaming mode — each message in a request must have a unique OTID. Retries of the same request should reuse the same OTIDs. - `run_id?: string | null` - `sender_id?: string | null` - `seq_id?: number | null` - `step_id?: string | null`