30 pages for systemmessage.

Deployments Claude Developer Platform · in the page api/beta/deployments …ng up. Default 3, max 20. format: int32 - `BetaManagedAgentsSystemMessageEventParams object` Privileged context for the accompanying turn and all subsequent turns, appended to the sessi… Archive Deployment Claude Developer Platform · in the page api/beta/deployments/archive …3, max 20. format: int32 - `BetaManagedAgentsDeploymentSystemMessageEvent object` Privileged context for the accompanying turn and all subsequent turns, appended to the session's… Create Deployment Claude Developer Platform · in the page api/beta/deployments/create …ng up. Default 3, max 20. format: int32 - `BetaManagedAgentsSystemMessageEventParams object` Privileged context for the accompanying turn and all subsequent turns, appended to the sessi… List Deployments Claude Developer Platform · in the page api/beta/deployments/list …3, max 20. format: int32 - `BetaManagedAgentsDeploymentSystemMessageEvent object` Privileged context for the accompanying turn and all subsequent turns, appended to the session's… Pause Deployment Claude Developer Platform · in the page api/beta/deployments/pause …3, max 20. format: int32 - `BetaManagedAgentsDeploymentSystemMessageEvent object` Privileged context for the accompanying turn and all subsequent turns, appended to the session's… Get Deployment Claude Developer Platform · in the page api/beta/deployments/retrieve …3, max 20. format: int32 - `BetaManagedAgentsDeploymentSystemMessageEvent object` Privileged context for the accompanying turn and all subsequent turns, appended to the session's… Unpause Deployment Claude Developer Platform · in the page api/beta/deployments/unpause …3, max 20. format: int32 - `BetaManagedAgentsDeploymentSystemMessageEvent object` Privileged context for the accompanying turn and all subsequent turns, appended to the session's… Update Deployment Claude Developer Platform · in the page api/beta/deployments/update …ng up. Default 3, max 20. format: int32 - `BetaManagedAgentsSystemMessageEventParams object` Privileged context for the accompanying turn and all subsequent turns, appended to the sessi… Events Claude Developer Platform · in the page api/beta/sessions/events …itle. Present only when the update changed it. - `BetaManagedAgentsSystemMessageEvent object` A mid-conversation system message event. Carries system-role content that is appended to the sessi… List Events Claude Developer Platform · in the page api/beta/sessions/events/list …itle. Present only when the update changed it. - `BetaManagedAgentsSystemMessageEvent object` A mid-conversation system message event. Carries system-role content that is appended to the sessi… Send Events Claude Developer Platform · in the page api/beta/sessions/events/send …ether the tool execution resulted in an error. - `BetaManagedAgentsSystemMessageEventParams object` Privileged context for the accompanying turn and all subsequent turns, appended to the sessi… Stream Events Claude Developer Platform · in the page api/beta/sessions/events/stream …iles the preview. - `type: "event_delta"` - `BetaManagedAgentsSystemMessageEvent object` A mid-conversation system message event. Carries system-role content that is appended to the sessi… Threads Claude Developer Platform · in the page api/beta/sessions/threads …iles the preview. - `type: "event_delta"` - `BetaManagedAgentsSystemMessageEvent object` A mid-conversation system message event. Carries system-role content that is appended to the sessi… Events Claude Developer Platform · in the page api/beta/sessions/threads/events …itle. Present only when the update changed it. - `BetaManagedAgentsSystemMessageEvent object` A mid-conversation system message event. Carries system-role content that is appended to the sessi… List Session Thread Events Claude Developer Platform · in the page api/beta/sessions/threads/events/list …itle. Present only when the update changed it. - `BetaManagedAgentsSystemMessageEvent object` A mid-conversation system message event. Carries system-role content that is appended to the sessi… Stream Session Thread Events Claude Developer Platform · in the page api/beta/sessions/threads/events/stream …iles the preview. - `type: "event_delta"` - `BetaManagedAgentsSystemMessageEvent object` A mid-conversation system message event. Carries system-role content that is appended to the sessi… mid-conversation-effort-example Claude Developer Platform · in the page build-with-claude/mid-conversation-effort-example …e refresher every TURNS_BETWEEN_REFRESHERS user turns. private dueSystemMessages(): Anthropic.MessageParam[] { const due: Array<{ role: "system"; content: string }> = []; if (this.exit… events-and-streaming Claude Developer Platform · in the page managed-agents/events-and-streaming …n.ID, new() { Events = [ new BetaManagedAgentsSystemMessageEventParams { Type = BetaManagedAgentsSystemMessageEventParamsType.SystemMessage,… How the agent loop works Claude Code CLI · in the page agent-sdk/agent-loop …rompt, tool definitions, and conversation history. The SDK yields a [`SystemMessage`](#message-types) with subtype `"init"` containing session metadata. 2. **Evaluate and respond.** Claude evaluates t… Intercept and control agent behavior with hooks Claude Code CLI · in the page agent-sdk/hooks …ries of fields: * **Top-level fields** are accepted on every event: `systemMessage` shows a message to the user, and `continue` (`continue_` in Python) determines whether the agent keeps running afte… Connect to external tools with MCP Claude Code CLI · in the page agent-sdk/mcp …ort asyncio from claude_agent_sdk import query, ClaudeAgentOptions, SystemMessage async def main(): options = ClaudeAgentOptions( mcp_servers={ # your servers… Plugins in the SDK Claude Code CLI · in the page agent-sdk/plugins …ort asyncio from claude_agent_sdk import query, ClaudeAgentOptions, SystemMessage async def main(): async for message in query( prompt="Hello", options=ClaudeAgentOptio… Agent SDK reference - Python Claude Code CLI · in the page agent-sdk/python …theme={null} Message = ( UserMessage | AssistantMessage | SystemMessage | ResultMessage | StreamEvent | RateLimitEvent | ConversationResetMessage ) ``` ### `UserMessage`… Work with sessions Claude Code CLI · in the page agent-sdk/sessions …cript the ID is also available earlier as a direct field on the init `SystemMessage`; in Python it's nested inside `SystemMessage.data`. <CodeGroup> ```python Python theme={null} import asyncio… Extend agents with skills Claude Code CLI · in the page agent-sdk/skills …ort asyncio from claude_agent_sdk import query, ClaudeAgentOptions, SystemMessage async def main(): async for message in query(prompt="Hello Claude", options=ClaudeAgentOptions(max_turns=1… Stream responses in real-time Claude Code CLI · in the page agent-sdk/streaming-output …receive all message types except `StreamEvent`. Common types include `SystemMessage` (session initialization), `AssistantMessage` (complete responses), `ResultMessage` (final result), and a compact bo… Agent SDK reference - TypeScript Claude Code CLI · in the page agent-sdk/typescript …When the CLI advertises the `interrupt_receipt_v1` capability in [`SDKSystemMessage.capabilities`](#sdksystemmessage), resolves with an [`SDKControlInterruptResponse`](#sdkcontrolinterruptresponse) li… Run Claude Code programmatically Claude Code CLI · in the page headless …Code v2.1.205 or later and is absent from earlier versions. See [`SDKSystemMessage`](/docs/en/agent-sdk/typescript#sdksystemmessage) for the capability list. #### Fail CI when a plugin or MCP server… Hooks reference Claude Code CLI · in the page hooks …dev/tty`. To surface a message to the user on any platform, return [`systemMessage`](#json-output) in JSON output. Some events discard it or deliver it elsewhere, and each [event's section](#hook-eve… Automate actions with hooks Claude Code CLI · in the page hooks-guide …you see nothing, unless the hook's JSON surfaces something, such as `systemMessage` or Stop hook feedback. * To confirm a hook ran, check for its effect, like a reformatted file, or turn on debug l…