350 pages for wrap.

tools Claude Developer Platform · in the page managed-agents/tools …nts/self-hosted-sandboxes-custom-tools). These can include tools that wrap an MCP server inside your network. ### Best practices for custom tool definitions * **Provide extremely detailed descriptio… webhooks Claude Developer Platform · in the page managed-agents/webhooks …, and `webhook-signature` headers. In every SDK except C#, use the `unwrap()` (csharp, go: `Unwrap()`) helper to verify the signature and parse the event in one step. It throws if the signature is inv… workflow-runs Claude Developer Platform · in the page managed-agents/workflow-runs …the run with, word for word, and not to start another run. ```text wrap Print the workflow that you started the run with, word for word, in one code block. Do not start another run. ``` </Tip>… migration-guide Claude Developer Platform · in the page models/fable-5-2/migration-guide …block back after one of those edits returns a 400 error: ```text wrap messages.5.content.0: Invalid `signature` in `thinking` block. The block is bound to a different conversation. Remove the… whats-new-opus-5-5 Claude Developer Platform · in the page models/opus-5-5/whats-new-opus-5-5 …"adaptive"}`, which is equivalent. The error messages are: ```text wrap "thinking.type.disabled" is not supported for this model. Use "thinking.type.adaptive" and "output_config.effort" to control… migration-guide Claude Developer Platform · in the page models/sonnet-5-5/migration-guide …onnet 5.5, `disabled` returns a 400 `invalid_request_error`: ```text wrap To turn thinking off on this model, send "thinking": {"type": "between_tools"} instead of {"type": "disabled"}. The model doe… whats-new-sonnet-5-5 Claude Developer Platform · in the page models/sonnet-5-5/whats-new-sonnet-5-5 …ool", "name": "..."}` returns a 400 `invalid_request_error`: ```text wrap tool_choice: type "tool" and "any" are not supported for this model. ``` `tool_choice: {"type": "auto"}` (the default) and `… claude-fable-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-fable-5 …pp](https://anthropic.com/android). --- ## October 30, 2026 ```text wrap <claude_behavior> <product_information> Here is some information about Claude and Anthropic's products in case the person ask… claude-fable-5-1 Claude Developer Platform · in the page release-notes/system-prompts/claude-fable-5-1 …pp](https://anthropic.com/android). --- ## October 30, 2026 ```text wrap <claude_behavior> <product_information> Here is some information about Claude and Anthropic's products in case the person ask… claude-fable-5-2 Claude Developer Platform · in the page release-notes/system-prompts/claude-fable-5-2 …pp](https://anthropic.com/android). --- ## November 9, 2026 ```text wrap <claude_behavior> <product_information> Here is some information about Claude and Anthropic's products in case the person ask… claude-haiku-3 Claude Developer Platform · in the page release-notes/system-prompts/claude-haiku-3 …d app](https://anthropic.com/android). --- ## July 12, 2024 ```text wrap The assistant is Claude, created by Anthropic. The current date is {{currentDateTime}}. Claude's knowledge base was last upda… claude-haiku-3-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-haiku-3-5 …anthropic.com/android). --- ## October 22, 2024 Text only: ```text wrap The assistant is Claude, created by Anthropic. The current date is {{currentDateTime}}. Claude's knowledge base was last upda… claude-haiku-4-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-haiku-4-5 …rked with `**` around the changed text. ## October 23, 2026 ```text wrap <claude_behavior> <product_information> Here is some information about Claude and Anthropic's products in case the person ask… claude-haiku-5-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-haiku-5-5 …pp](https://anthropic.com/android). --- ## October 26, 2026 ```text wrap <claude_behavior> When a question is about the person or their world, Claude checks the `<memory_listing>` before answering f… claude-opus-3 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-3 …d app](https://anthropic.com/android). --- ## July 12, 2024 ```text wrap The assistant is Claude, created by Anthropic. The current date is {{currentDateTime}}. Claude's knowledge base was last upda… claude-opus-4 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-4 …app](https://anthropic.com/android). --- ## August 5, 2025 ```text wrap The assistant is Claude, created by Anthropic. The current date is {{currentDateTime}}. Here is some information about Clau… claude-opus-4-1 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-4-1 …app](https://anthropic.com/android). --- ## August 5, 2025 ```text wrap The assistant is Claude, created by Anthropic. The current date is {{currentDateTime}}. Here is some information about Clau… claude-opus-4-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-4-5 …rked with `**` around the changed text. ## January 18, 2026 ```text wrap <claude_behavior> <product_information> Here is some information about Claude and Anthropic's products in case the person ask… claude-opus-4-6 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-4-6 …pp](https://anthropic.com/android). --- ## October 30, 2026 ```text wrap <claude_behavior> <product_information> This iteration of Claude is Claude Opus 4.6, the most advanced model in the Claude 4.… claude-opus-4-7 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-4-7 …pp](https://anthropic.com/android). --- ## October 30, 2026 ```text wrap <claude_behavior> <product_information> This iteration of Claude is Claude Opus 4.7. The Claude 4.7 family currently consists… claude-opus-4-8 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-4-8 …pp](https://anthropic.com/android). --- ## October 30, 2026 ```text wrap <claude_behavior> <product_information> Here is some information about Claude and Anthropic's products in case the person ask… claude-opus-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-5 …pp](https://anthropic.com/android). --- ## October 30, 2026 ```text wrap <claude_behavior> <product_information> Here is some information about Claude and Anthropic's products in case the person ask… claude-opus-5-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-5-5 …pp](https://anthropic.com/android). --- ## October 27, 2026 ```text wrap <claude_behavior> <product_information> Here is some information about Claude and Anthropic's products in case the person ask… claude-sonnet-3-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-3-5 …` around the changed text. ## November 22, 2024 Text only: ```text wrap The assistant is Claude, created by Anthropic. The current date is {{currentDateTime}}. Claude's knowledge base was last up… claude-sonnet-3-7 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-3-7 …p](https://anthropic.com/android). --- ## February 24, 2025 ```text wrap The assistant is Claude, created by Anthropic. The current date is {{currentDateTime}}. Claude enjoys helping humans and se… claude-sonnet-4 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-4 …app](https://anthropic.com/android). --- ## August 5, 2025 ```text wrap The assistant is Claude, created by Anthropic. The current date is {{currentDateTime}}. Here is some information about Clau… claude-sonnet-4-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-4-5 …rked with `**` around the changed text. ## January 18, 2026 ```text wrap <claude_behavior> <product_information> Here is some information about Claude and Anthropic's products in case the person ask… claude-sonnet-4-6 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-4-6 …pp](https://anthropic.com/android). --- ## October 14, 2026 ```text wrap <claude_behavior> <product_information> Here is some information about Claude and Anthropic's products in case the person ask… claude-sonnet-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-5 …pp](https://anthropic.com/android). --- ## October 30, 2026 ```text wrap <claude_behavior> <product_information> Here is some information about Claude and Anthropic's products in case the person ask… claude-sonnet-5-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-5-5 …pp](https://anthropic.com/android). --- ## October 27, 2026 ```text wrap <claude_behavior> <product_information> Here is some information about Claude and Anthropic's products in case the person ask… increase-consistency Claude Developer Platform · in the page test-and-evaluate/strengthen-guardrails/increase-consistency …dion title="Example: Standardizing customer feedback"> ```text User wrap You're a Customer Insights AI. Analyze this feedback and output in JSON format with keys: "sentiment" (positive/negative/ne… mitigate-jailbreaks Claude Developer Platform · in the page test-and-evaluate/strengthen-guardrails/mitigate-jailbreaks …xample: Harmlessness screen for content moderation"> ```text User wrap A user submitted this content: <content> {{CONTENT}} </content> Classify whether this content refers to… reduce-hallucinations Claude Developer Platform · in the page test-and-evaluate/strengthen-guardrails/reduce-hallucinations …="Example: Analyzing a merger and acquisition report"> ```text User wrap As our M&A advisor, analyze this report on the potential acquisition of AcmeCo by ExampleCorp. <report> {{REPORT}} <… reduce-prompt-leak Claude Developer Platform · in the page test-and-evaluate/strengthen-guardrails/reduce-prompt-leak …laude-prompting-best-practices#give-claude-a-role). ```text System wrap You are AnalyticsBot, an AI assistant that uses our proprietary EBITDA formula: EBITDA = Revenue - COGS - (SG&A - Stock C… Set up Claude Code for your organization Claude Code CLI · in the page admin-setup …quired corporate launcher instead of turning agent view off | `processWrapper` | | [Model restrictions](https://code.claude.com/docs/en/model-config.md#restrict-model-selection) | `availableModels` fi… How the agent loop works Claude Code CLI · in the page agent-sdk/agent-loop …e, `message.type === "result"`). `AssistantMessage` and `UserMessage` wrap the raw API message in a `.message` field, so content blocks are at `message.message.content`, not `message.content`. > [acc… Configure your agent Claude Code CLI · in the page agent-sdk/configuration …e-shot `query()`**: the SDK yields the cap result and then raises, so wrap the loop in a try block to continue past the error * **Streaming input**: the session stays alive past a cap result, and the… Give Claude custom tools Claude Code CLI · in the page agent-sdk/custom-tools …ional](#make-a-parameter-optional). | | Register a tool with Claude | Wrap in `create_sdk_mcp_server` / `createSdkMcpServer` and pass to `mcpServers` in `query()`. See [Call a custom tool](#call-a-cus… Hosting the Agent SDK Claude Code CLI · in the page agent-sdk/hosting …session files on disk. Hosting it is not like hosting a stateless API wrapper. Every running agent is a long-lived process tied to local state, which shapes how you allocate resources, persist session… Modifying system prompts Claude Code CLI · in the page agent-sdk/modifying-system-prompts …ook in the `messages` array. A reminder appears inside a user message wrapped in `<system-reminder>` tags or, on some models, as a separate message with the `system` role. ## Compare the four approac… Observability with OpenTelemetry Claude Code CLI · in the page agent-sdk/observability …an inspect in your tracing backend: * **`claude_code.interaction`:** wraps a single turn of the agent loop, from receiving a prompt to producing a response. * **`claude_code.llm_request`:** wraps eac… Agent SDK reference - Python Claude Code CLI · in the page agent-sdk/python …/ `async with` fragments on this page are illustrative. To run them, wrap the body in `async def main(): ...` and call `asyncio.run(main())`. ### `query()` Creates a new session for each interactio… Securely deploying AI agents Claude Code CLI · in the page agent-sdk/secure-deployment …in. **How it works:** * **Filesystem**: Uses OS primitives (`bubblewrap` on Linux, `sandbox-exec` on macOS) to restrict read/write access to configured paths * **Network**: Runs commands in their o… Extend agents with skills Claude Code CLI · in the page agent-sdk/skills …gent-loop.md#handle-the-result). If your command might hit the limit, wrap the loop in a `try`/`catch` in TypeScript or `try`/`except` in Python, as shown in [Single Message Input](https://code.claude… Stream responses in real-time Claude Code CLI · in the page agent-sdk/streaming-output …ial messages are enabled, you receive raw Claude API streaming events wrapped in an object. The type has different names in each SDK: * **Python**: [`StreamEvent`](https://code.claude.com/docs/en/age… Streaming Input Claude Code CLI · in the page agent-sdk/streaming-vs-single-mode …includes the failure text after yielding the final result message, so wrap the loop in a try block if your code needs to continue. See [Handle the result](https://code.claude.com/docs/en/agent-sdk/age… Subagents in the SDK Claude Code CLI · in the page agent-sdk/subagents …directly via `message.content`. In TypeScript, `SDKAssistantMessage` wraps the Claude API message, so you access content via `message.message.content`. This example iterates through streamed message… Track todos Claude Code CLI · in the page agent-sdk/todo-tracking …n error that includes `Reached maximum number of turns`. Each example wraps its loop in a try block to exit cleanly when that happens. See [Handle the result](https://code.claude.com/docs/en/agent-sdk… Scale to many tools with tool search Claude Code CLI · in the page agent-sdk/tool-search …` call, the SDK raises after yielding an error result, so the example wraps the loop in a try block. To see why a run failed, check the result message's `subtype`, such as `error_during_execution`, in… Troubleshoot the Agent SDK Claude Code CLI · in the page agent-sdk/troubleshooting …han a `ResultError`. ### Claude Code process exited with code N IDE wrappers print this message too, and the [error reference](https://code.claude.com/docs/en/errors.md#claude-code-process-exited-wi…