878 pages for check.

self-hosted-sandboxes-operations Claude Developer Platform · in the page managed-agents/self-hosted-sandboxes-operations …worker is claiming work. A queued session waits rather than failing. Check `workers_polling` (java, php: `workersPolling`; csharp, go: `WorkersPolling`) and `depth` (csharp, go: `Depth`) in [Read que… self-hosted-sandboxes-reference Claude Developer Platform · in the page managed-agents/self-hosted-sandboxes-reference …`null` (python: `None`; go: `param.Null[int64]()`) for a non-blocking check. Defaults to a 999ms long-poll. | | `reclai… session-observability Claude Developer Platform · in the page managed-agents/session-observability …s usage is labeled **Managed Agents**. To see who started a session, check the **Created by** column on the [Sessions](https://platform.claude.com/sessions) page. ## Debugging tips * **Check sessio… session-operations Claude Developer Platform · in the page managed-agents/session-operations …cs/en/managed-agents/files#listing-and-downloading-session-files), so check that the files you expect are listed first. <CodeGroup> ```bash cURL curl -fsSL -X DELETE "https://api.anthropic.com/v1… skills Claude Developer Platform · in the page managed-agents/skills …process/` * `SKILL.md` * `scripts/` * `run_checks.sh` * `src/` Locations that don’t match this layout aren’t discovered at session start: * `.claude/skills/SKILL.md`: a… tools-web-restrictions Claude Developer Platform · in the page managed-agents/tools-web-restrictions …naged-agents/environments#networking), session create and update also check `allowed_domains` (java, php: `allowedDomains`; csharp, go: `AllowedDomains`) against the environment’s `allowed_hosts` (jav… vaults Claude Developer Platform · in the page managed-agents/vaults …lients that send the secret value verbatim in an outbound request, so check the client eligibility criteria in this tab before configuring one. The `allowed_hosts` (java, php: `allowedHosts`; csh… webhooks Claude Developer Platform · in the page managed-agents/webhooks …ted on every retry, so retries aren’t rejected by the SDK’s freshness check. It’s the clock for the delivery attempt, not for the event: use the event payload’s `created_at` (java, php: `createdAt`; c… workflow-runs Claude Developer Platform · in the page managed-agents/workflow-runs …During a run, the agent can keep working or end its turn, and it can check on the run. <Frame> . The API also checks whether anything before a Claude Opus 5.5 thinking block (the `system` prompt, the `tools`, or an earlier message) has chan… Models overview Claude Developer Platform · in the page models/overview …i/models#model_capabilities.code_execution) capability is a different check. It reports whether code that Claude runs in the code execution tool can call the request’s other tools, as in [programmatic… migration-guide Claude Developer Platform · in the page models/sonnet-5-5/migration-guide …net 5.5 includes settings that return errors, thinking changes, and a checklist for each starting model. --- This guide lists the code changes for moving to Claude Sonnet 5.5 from Claude Sonnet 5, Cl… whats-new-sonnet-5-5 Claude Developer Platform · in the page models/sonnet-5-5/whats-new-sonnet-5-5 …"auto"}` (the default) and `{"type": "none"}` are supported. The same check applies to the [token counting](https://platform.claude.com/docs/en/build-with-claude/token-counting) endpoint. For schema-v… overview Claude Developer Platform · in the page release-notes/overview …le-5-2). * Claude Fable 5.2 and Claude Mythos 5.2 enforce the [prefix check](https://platform.claude.com/docs/en/build-with-claude/preserved-thinking#prefix-check) for every account, whatever its age.… claude-fable-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-fable-5 …cts. For anything not mentioned here, Claude encourages the person to check the Anthropic website or ask the Claude within that product. If the person asks Claude about how many messages they can sen… claude-fable-5-1 Claude Developer Platform · in the page release-notes/system-prompts/claude-fable-5-1 …cts. For anything not mentioned here, Claude encourages the person to check the Anthropic website or ask the Claude within that product. If the person asks Claude about how many messages they can sen… claude-fable-5-2 Claude Developer Platform · in the page release-notes/system-prompts/claude-fable-5-2 …cts. For anything not mentioned here, Claude encourages the person to check the Anthropic website or ask the Claude within that product. For product or account questions (message limits, pricing, in-… claude-haiku-3-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-haiku-3-5 …a database and may hallucinate citations, so the human should double check its citations. Claude uses Markdown formatting. When using Markdown, Claude always follows best practices for clarity and c… claude-haiku-4-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-haiku-4-5 …thing further. Things may have developed since this notice, so Claude checks for newer information when it can search, and otherwise suggests checking Anthropic's site. The person can switch models m… claude-haiku-5-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-haiku-5-5 …_behavior> When a question is about the person or their world, Claude checks the `<memory_listing>` before answering from the conversation alone, and opens any file whose description suggests it holds… claude-opus-4 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-4 …the person asks Claude about Claude Code, Claude should point them to check the documentation at https://docs.anthropic.com/en/claude-code. There are no other Anthropic products. Claude can provide t… claude-opus-4-1 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-4-1 …the person asks Claude about Claude Code, Claude should point them to check the documentation at https://docs.anthropic.com/en/claude-code. There are no other Anthropic products. Claude can provide t… claude-opus-4-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-4-5 …not explicitly mentioned here, Claude should encourage the person to check the Anthropic website for more information. If the person asks Claude about how many messages they can send, costs of Claud… claude-opus-4-6 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-4-6 …cts. For anything not mentioned here, Claude encourages the person to check the Anthropic website or ask the Claude within that product. For product or account questions (message limits, pricing, in-… claude-opus-4-7 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-4-7 …cts. For anything not mentioned here, Claude encourages the person to check the Anthropic website or ask the Claude within that product. For product or account questions (message limits, pricing, in-… claude-opus-4-8 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-4-8 …thing further. Things may have developed since this notice, so Claude checks for newer information when it can search, and otherwise suggests checking Anthropic's site. The person can switch models m… claude-opus-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-5 …thing further. Things may have developed since this notice, so Claude checks for newer information when it can search, and otherwise suggests checking Anthropic's site. The person can switch models m… claude-opus-5-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-opus-5-5 …thing further. Things may have developed since this notice, so Claude checks for newer information when it can search, and otherwise suggests checking Anthropic's site. The person can switch models m… claude-sonnet-3-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-3-5 …a database and may hallucinate citations, so the human should double check its citations. Claude is intellectually curious. It enjoys hearing what humans think on an issue and engaging in discussion… claude-sonnet-3-7 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-3-7 …not explicitly mentioned here, Claude should encourage the person to check the Anthropic website for more information. If the person asks Claude about how many messages they can send, costs of Claud… claude-sonnet-4 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-4 …the person asks Claude about Claude Code, Claude should point them to check the documentation at https://docs.anthropic.com/en/claude-code. There are no other Anthropic products. Claude can provide t… claude-sonnet-4-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-4-5 …not explicitly mentioned here, Claude should encourage the person to check the Anthropic website for more information. If the person asks Claude about how many messages they can send, costs of Claud… claude-sonnet-4-6 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-4-6 …cts. For anything not mentioned here, Claude encourages the person to check the Anthropic website or ask the Claude within that product. For product or account questions (message limits, pricing, in-… claude-sonnet-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-5 …thing further. Things may have developed since this notice, so Claude checks for newer information when it can search, and otherwise suggests checking Anthropic's site. The person can switch models m… claude-sonnet-5-5 Claude Developer Platform · in the page release-notes/system-prompts/claude-sonnet-5-5 …thing further. Things may have developed since this notice, so Claude checks for newer information when it can search, and otherwise suggests checking Anthropic's site. The person can switch models m… develop-tests Claude Developer Platform · in the page test-and-evaluate/develop-tests …ur LLM application and build evaluations to test it, from exact match checks to LLM-based grading. --- Building a successful LLM-based application starts with clearly defining your success criteria a… handle-streaming-refusals Claude Developer Platform · in the page test-and-evaluate/strengthen-guardrails/handle-streaming-refusals …5", ) as stream: for event in stream: # Check for refusal in message delta if event.type == "message_delta": if event.delta.stop_reason ==… increase-consistency Claude Developer Platform · in the page test-and-evaluate/strengthen-guardrails/increase-consistency …o log in</content> </entry> </kb> When helping users, always check the knowledge base first. Respond in this format: <response> <kb_entry>Knowledge base entry used</kb_entry> <answ… mitigate-jailbreaks Claude Developer Platform · in the page test-and-evaluate/strengthen-guardrails/mitigate-jailbreaks …scan this content for potential prompt injections and steer Claude to check whether the instruction really came from you before acting. See those pages for details and opt-out information. </Note> ##… Use Claude Code with a screen reader Claude Code CLI · in the page accessibility …; bind the `scrollToMark` action in its settings * Kitty and Ghostty: check the terminal's documentation for its jump-to-prompt key macOS Terminal doesn't act on the markers, and Claude Code doesn't… Set up Claude Code for your organization Claude Code CLI · in the page admin-setup …ach devices Managed settings define organization policy. Claude Code checks the four sources in the table below in priority order. [How Claude Code combines managed sources](https://code.claude.com/d… Escalate hard decisions with the advisor tool Claude Code CLI · in the page advisor …ions where an error keeps recurring, and tasks you want independently checked before Claude declares them done. It adds less value on short tasks where there is little to plan, or on work where every… How the agent loop works Claude Code CLI · in the page agent-sdk/agent-loop …p. Contains the final text result, token usage, cost, and session ID. Check the `subtype` field to determine whether the task succeeded or hit a limit. A small number of trailing system events, such a… Use Claude Code features in the SDK Claude Code CLI · in the page agent-sdk/claude-code-features …essage in query( prompt="Review this PR using our code review checklist", options=ClaudeAgentOptions( setting_sources=["user", "project"], skills="all",… Configure your agent Claude Code CLI · in the page agent-sdk/configuration …`. The method takes settings file keys rather than options fields, so check the [`applyFlagSettings()` reference](https://code.claude.com/docs/en/agent-sdk/typescript#applyflagsettings) for the schema… Track cost and usage Claude Code CLI · in the page agent-sdk/cost-tracking …n you read the value: * In Python the field is typed as optional, so check that it isn't `None` before you read it. * Success and error results both carry it, though the final result of a [session cr…