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claude-sonnet-3-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-3-5 …the information in these tags if asked but it does not know any other details of the Claude 3 model family. If asked about this, Claude should encourage the human to check the Anthropic website for mo…

claude-sonnet-3-7 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-3-7 …an provide the information here if asked, but does not know any other details about Claude models, or Anthropic's products. Claude does not offer instructions about how to use the web application or C…

claude-sonnet-4 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-4 …an provide the information here if asked, but does not know any other details about Claude models, or Anthropic's products. Claude does not offer instructions about how to use the web application. If…

claude-sonnet-4-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-4-5 …to automate file and task management**. **Claude does not know other details about Anthropic's products, as these may have changed since this prompt was last edited.** Claude can provide the informat…

claude-sonnet-4-6 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-4-6 …Claude's product knowledge ends here; it has no documentation access, details may have changed, and it doesn't give instructions on how to use the application or other products. For anything not menti…

claude-sonnet-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-5 …Claude's product knowledge ends here; it has no documentation access, details may have changed, and it doesn't give instructions on how to use the application or other products. For anything not menti…

claude-sonnet-5-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-5-5 …Claude's product knowledge ends here; it has no documentation access, details may have changed, and it doesn't give instructions on how to use the application or other products. For anything not menti…

overview Claude Developer Platform · in the page resources/overview …m.claude.com/docs/en/resources/overview description: Model cards with detailed documentation for Claude models. --- <CardGroup cols={3}> <Card title="Claude Fable 5.2 and Mythos 5.2 System Card" ic…

develop-tests Claude Developer Platform · in the page test-and-evaluate/develop-tests …e information? Can it follow instructions not to use or share certain details? </Accordion> <Accordion title="Context utilization"> How effectively does the model use provided context? How we…

handle-streaming-refusals Claude Developer Platform · in the page test-and-evaluate/strengthen-guardrails/handle-streaming-refusals …ages API**: The stream ends with `stop_reason` `"refusal"`, and `stop_details` (`category` and `explanation`) arrives on the `message_delta` event. * **Managed Agents**: A refused turn ends, and the s…

increase-consistency Claude Developer Platform · in the page test-and-evaluate/strengthen-guardrails/increase-consistency …sistent responses. <Tip> When setting up the character, provide detailed information about the personality, background, and any specific traits or quirks. This helps the model better emulate and…

mitigate-jailbreaks Claude Developer Platform · in the page test-and-evaluate/strengthen-guardrails/mitigate-jailbreaks …e instruction really came from you before acting. See those pages for details and opt-out information. </Note> ## Continuous monitoring Regularly analyze outputs for signs of successful injection. U…

reduce-latency Claude Developer Platform · in the page test-and-evaluate/strengthen-guardrails/reduce-latency …nd { |block| block.type == :text }&.text ``` </CodeGroup> For more details about model metrics, see [Models overview](https://platform.claude.com/docs/en/models/overview). ### 2. Optimize prompt a…

reduce-prompt-leak Claude Developer Platform · in the page test-and-evaluate/strengthen-guardrails/reduce-prompt-leak …s for more nuanced leaks. </Note> * **Avoid unnecessary proprietary details:** If Claude doesn’t need it to perform the task, don’t include it. Extra content reduces Claude’s adherence to “no leak”…

Set up Claude Code for your organization Claude Code CLI · in the page admin-setup …# Next steps With provider and delivery mechanism chosen, move on to detailed configuration: * [Server-managed settings](https://code.claude.com/docs/en/server-managed-settings.md): deliver managed…

How the agent loop works Claude Code CLI · in the page agent-sdk/agent-loop …s](https://code.claude.com/docs/en/agent-sdk/permissions.md) for full details. ### Model Set the `model` option to choose which model runs the session. For more information, see [Choose a model](htt…

Use Claude Code features in the SDK Claude Code CLI · in the page agent-sdk/claude-code-features …he SDK](https://code.claude.com/docs/en/agent-sdk/skills.md) for full details. ## Hooks The SDK supports two ways to define hooks, and they run side by side: * **Filesystem hooks:** shell commands…

Track cost and usage Claude Code CLI · in the page agent-sdk/cost-tracking …mpt caching with the Claude Agent SDK. The Claude Agent SDK provides detailed token usage information for each interaction with Claude. This guide explains how to properly track usage and understand…

Give Claude custom tools Claude Code CLI · in the page agent-sdk/custom-tools …om/docs/en/agent-sdk/python#tool) Python reference for full parameter details, including JSON Schema input formats and return value structure. ### Make a parameter optional To make a parameter optio…

Intercept and control agent behavior with hooks Claude Code CLI · in the page agent-sdk/hooks …he tool name, its arguments, the session ID, and other event-specific details. **5. Your callback returns a decision** After performing any operations (logging, API calls, validation), your callback…

Hosting the Agent SDK Claude Code CLI · in the page agent-sdk/hosting …For self-hosted options such as Docker, gVisor, and Firecracker, and detailed isolation configuration, see [Isolation Technologies](https://code.claude.com/docs/en/agent-sdk/secure-deployment.md#isol…

Connect to external tools with MCP Claude Code CLI · in the page agent-sdk/mcp …discovery cache](https://code.claude.com/docs/en/mcp.md#server-status-detail) is on. Servers from [settings files](#from-a-config-file) such as `.mcp.json`, or from plugins, often still show `pending…

Migrate to Claude Agent SDK Claude Code CLI · in the page agent-sdk/migration-guide …ference](https://code.claude.com/docs/en/agent-sdk/typescript.md) for detailed API documentation * Review the [Python SDK Reference](https://code.claude.com/docs/en/agent-sdk/python.md) for Python-spe…

Modifying system prompts Claude Code CLI · in the page agent-sdk/modifying-system-prompts …"preset", preset: "claude_code", append: "Always include detailed docstrings and type hints in Python code." } } })) { messages.push(message); if (message.type === "assistant")…

Observability with OpenTelemetry Claude Code CLI · in the page agent-sdk/observability …ERVAL: "1000", }; ``` ## Read agent traces Traces give you the most detailed view of an agent run. With `CLAUDE_CODE_ENHANCED_TELEMETRY_BETA=1` set, each step of the agent loop becomes a span you ca…

Agent SDK overview Claude Code CLI · in the page agent-sdk/overview …LICENSE file. ## Next steps These resources cover deeper technical detail and example projects for building with the Agent SDK. * [Quickstart](https://code.claude.com/docs/en/agent-sdk/quickstart.…

Configure permissions Claude Code CLI · in the page agent-sdk/permissions …le.log(message.result); > } > } > } > > main(); > ``` ### Mode details #### Accept edits mode (`acceptEdits`) Auto-approves file operations so Claude can edit code without prompting. Other to…

Quickstart Claude Code CLI · in the page agent-sdk/quickstart …ft Foundry](https://code.claude.com/docs/en/microsoft-foundry.md) for details. > [!NOTE] > > Unless previously approved, Anthropic does not allow third party developers to offer claude.ai login or ra…

Securely deploying AI agents Claude Code CLI · in the page agent-sdk/secure-deployment …overview) and the system card for the model you deploy for evaluation details. Defense in depth is still good practice though. For example, if an agent processes a malicious file that instructs it to…

Work with sessions Claude Code CLI · in the page agent-sdk/sessions …n/agent-sdk/python.md#choosing-between-query-and-claudesdkclient) for details on when to use `ClaudeSDKClient` vs the standalone `query()` function. ### TypeScript: `continue: true` The TypeScript S…

Extend agents with skills Claude Code CLI · in the page agent-sdk/skills …eatures.md#control-filesystem-settings-with-settingsources). For more details on `settingSources`/`setting_sources`, see the [TypeScript SDK reference](https://code.claude.com/docs/en/agent-sdk/typesc…

Subagents in the SDK Claude Code CLI · in the page agent-sdk/subagents …practices, and constraints. A `database-migration` subagent can have detailed knowledge about SQL best practices, rollback strategies, and data integrity checks that would be unnecessary noise in the…

Track todos Claude Code CLI · in the page agent-sdk/todo-tracking …t`. Claude can read the list back with `TaskList` and one task's full details with `TaskGet`. ```typescript TypeScript theme={null} import { query } from "@anthropic-ai/claude-agent-sdk"; type Task…

Scale to many tools with tool search Claude Code CLI · in the page agent-sdk/tool-search …context window, loading everything upfront is typically faster. For details on the underlying API mechanism, see [Tool search in the API](https://platform.claude.com/docs/en/agents-and-tools/tool-us…

TypeScript SDK V2 session API (removed) Claude Code CLI · in the page agent-sdk/typescript-v2-preview …result.subtype === "success") { console.log(result.result); } ``` <details> <summary>See the same operation in V1</summary> ```typescript theme={null} import { query } from "@anthropic-ai/cl…

Handle approvals and user input Claude Code CLI · in the page agent-sdk/user-input …l": "Summary", "description": "Brief overview" }, { "label": "Detailed", "description": "Full explanation" } ], "multiSelect": false }, { "question": "Which sections…

Orchestrate teams of Claude Code sessions Claude Code CLI · in the page agent-teams …tory. See [Context and communication](#context-and-communication) for details. Include task-specific details in the spawn prompt: ```text wrap theme={null} Spawn a security reviewer teammate with the…

Manage multiple agents with agent view Claude Code CLI · in the page agent-view …terface. Values that a session or another program writes to `state`, `detail`, `tempo`, or `needs` are replaced on the next update. If you want a session to report progress in its own words, have it…

Run agents in parallel Claude Code CLI · in the page agents …s](https://code.claude.com/docs/en/costs.md) for usage and rate limit details. ## Choose an approach The right approach depends on who coordinates the work, whether the workers need to communicate,…

Claude Code on Amazon Bedrock Claude Code CLI · in the page amazon-bedrock …Access is granted immediately after submission. See [Submit use case details](#1-submit-use-case-details) for AWS Organizations and [IAM configuration](#iam-configuration) for the permissions your ro…

Track team usage with analytics Claude Code CLI · in the page analytics …ribution metrics with GitHub integration, leaderboard, data export | [Details](#access-analytics-for-team-and-enterprise) | | API (Claude Console) | [platform.claude.com/claude-code](https://platform.…

Champion kit Claude Code CLI · in the page champion-kit …a brief before-and-after description, is generally the right level of detail. Keep each post short enough that someone scrolling past still absorbs the point. A long write-up tends to be saved for lat…

Claude Code changelog Claude Code CLI · in the page changelog …* Improved the contrast of faint gray secondary text, such as hints, details in `/stats`, `/model` and `/sandbox`, and rejected-action messages * Improved the artifact database error when an update t…

Channels reference Claude Code CLI · in the page channels-reference …ication format](#notification-format) sections cover each of these in detail. See [Example: build a webhook receiver](#example-build-a-webhook-receiver) for a full walkthrough. During the research pr…

Checkpointing Claude Code CLI · in the page checkpointing …ges stay in the session transcript, so Claude can still reference the details. To guide what the summary focuses on, highlight a **Summarize** option with the arrow keys and type instructions where th…

Use Claude Code with Chrome Claude Code CLI · in the page chrome …Claude in Chrome browser extension](https://chromewebstore.google.com/detail/claude/fcoeoabgfenejglbffodgkkbkcdhcgfn) to give you browser automation capabilities from the CLI or the [VS Code extension…

Claude apps gateway for Amazon Bedrock, Claude Platform on AWS, Google Cloud, and Microsoft Foundry Claude Code CLI · in the page claude-apps-gateway …## Prerequisites Have these in place before you start: | You need | Details | | - | - | | Claude Code v2.1.195 or later | The `claude gateway` subcommand and the gateway sign-in flow ship in v2.1.19…