{
  "id": "model-transport:anthropic-messages",
  "_kind": "ModelTransportProtocol",
  "_file": "compute/model-transport-protocols/anthropic-messages.yaml",
  "_cluster": "compute",
  "attributes": {
    "displayName": "Anthropic Messages",
    "vendor": "Anthropic",
    "specUrl": "https://docs.anthropic.com/en/api/messages",
    "streamingFraming": "sse",
    "toolUseSchema": "Tool calls appear as `tool_use` content blocks with `id`, `name`, and\n`input`; results are returned as `tool_result` blocks referencing the\nsame `id`.\n",
    "thinkingChannel": "content-block",
    "cacheControl": "explicit",
    "firstSpecVersion": "2023-07-12",
    "currentSpecVersion": "2025-04-01",
    "status": "standard",
    "requestBodyShape": "POST /v1/messages\nJSON body (top-level fields):\n  - `model` (required, string)\n  - `messages` (required, array of `{role: \"user\"|\"assistant\", content: string|ContentBlock[]}`)\n  - `system` (optional, string or array of content blocks)\n  - `max_tokens` (required, int)\n  - `tools` (optional, array of tool definitions `{name, description, input_schema}`)\n  - `tool_choice` (optional, `{type: \"auto\"|\"any\"|\"tool\", name?}`)\n  - `temperature`, `top_p`, `top_k`, `stop_sequences` (optional)\n  - `stream` (optional, bool)\n  - `thinking` (optional, `{type: \"enabled\", budget_tokens}` for extended thinking)\n  - `metadata` (optional, `{user_id?}`)\n",
    "responseBodyShape": "Non-streaming response (HTTP 200 application/json):\n  {\n    \"id\": \"msg_...\",\n    \"type\": \"message\",\n    \"role\": \"assistant\",\n    \"model\": \"...\",\n    \"content\": [ ContentBlock, ... ],\n    \"stop_reason\": \"end_turn\"|\"max_tokens\"|\"stop_sequence\"|\"tool_use\",\n    \"stop_sequence\": null|string,\n    \"usage\": {\n      \"input_tokens\": int,\n      \"output_tokens\": int,\n      \"cache_creation_input_tokens\"?: int,\n      \"cache_read_input_tokens\"?: int\n    }\n  }\n",
    "streamingEventTypes": [
      "message_start",
      "content_block_start",
      "content_block_delta",
      "content_block_stop",
      "message_delta",
      "message_stop",
      "ping",
      "error"
    ],
    "toolCallWireFormat": "A `tool_use` content block in `message.content`:\n  { \"type\": \"tool_use\", \"id\": \"toolu_...\", \"name\": \"<tool_name>\", \"input\": { ... } }\n`id` is the call correlation handle echoed back on the matching tool result.\n",
    "toolResultWireFormat": "A `tool_result` content block in a subsequent user-role message:\n  { \"type\": \"tool_result\",\n    \"tool_use_id\": \"toolu_...\",\n    \"content\": string | ContentBlock[],\n    \"is_error\"?: bool }\n",
    "errorEnvelope": "Non-2xx response, `application/json`:\n  { \"type\": \"error\",\n    \"error\": { \"type\": \"invalid_request_error\"|\"authentication_error\"|\"permission_error\"|\"not_found_error\"|\"rate_limit_error\"|\"api_error\"|\"overloaded_error\"|\"request_too_large\", \"message\": string } }\nHTTP status: 400/401/403/404/413/429/500/529 according to `error.type`.\n",
    "cacheControlWireFormat": "Per-content-block annotation:\n  { \"type\": \"text\", \"text\": \"...\", \"cache_control\": { \"type\": \"ephemeral\", \"ttl\"?: \"5m\"|\"1h\" } }\nUp to four cache breakpoints per request. Applies to system, messages, and tools.\n",
    "rateLimitSignaling": "Response headers on every request:\n  - `anthropic-ratelimit-requests-limit`, `anthropic-ratelimit-requests-remaining`,\n    `anthropic-ratelimit-requests-reset`\n  - `anthropic-ratelimit-tokens-limit`, `anthropic-ratelimit-tokens-remaining`,\n    `anthropic-ratelimit-tokens-reset`\n  - `anthropic-ratelimit-input-tokens-*`, `anthropic-ratelimit-output-tokens-*`\nOn HTTP 429: `retry-after` header (seconds).\n",
    "reasoningWireFormat": "A `thinking` content block:\n  { \"type\": \"thinking\", \"thinking\": \"<text>\", \"signature\": \"<opaque>\" }\nRedacted variant when content is filtered server-side:\n  { \"type\": \"redacted_thinking\", \"data\": \"<opaque>\" }\nBoth must be echoed back verbatim (preserving signatures) on multi-turn\ntool-use loops or extended-thinking continuations.\n",
    "authHeaderFormat": "`x-api-key: <ANTHROPIC_API_KEY>`\n(Bedrock / Vertex use their respective IAM/OAuth flows instead.)\n",
    "versioningHeader": "Mandatory: `anthropic-version: 2023-06-01`\nOptional opt-ins: `anthropic-beta: <feature>[,<feature>...]`\n"
  },
  "outgoingEdges": [
    {
      "from": "model-transport:anthropic-messages",
      "to": "layer:3-transport",
      "kind": "realizes",
      "attributes": {}
    },
    {
      "from": "model-transport:anthropic-messages",
      "to": "provider:anthropic",
      "kind": "served_by"
    },
    {
      "from": "model-transport:anthropic-messages",
      "to": "provider:aws-bedrock",
      "kind": "served_by"
    },
    {
      "from": "model-transport:anthropic-messages",
      "to": "model:claude-opus-4-7@current",
      "kind": "spoken_by"
    },
    {
      "from": "model-transport:anthropic-messages",
      "to": "transport-proxy:adapters-proxy",
      "kind": "bridged_by"
    }
  ],
  "incomingEdges": [
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "model-transport:anthropic-messages",
      "kind": "speaks",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-agent-sdk.core@current",
      "to": "model-transport:anthropic-messages",
      "kind": "speaks",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "model-transport:anthropic-messages",
      "kind": "speaks",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code-remote-control.core@current",
      "to": "model-transport:anthropic-messages",
      "kind": "speaks",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:cursor.core@current",
      "to": "model-transport:anthropic-messages",
      "kind": "speaks",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:hermes.core@current",
      "to": "model-transport:anthropic-messages",
      "kind": "speaks",
      "attributes": {}
    },
    {
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      "to": "model-transport:anthropic-messages",
      "kind": "speaks",
      "attributes": {}
    },
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      "kind": "speaks",
      "attributes": {}
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      "attributes": {}
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      "kind": "speaks",
      "attributes": {}
    },
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      "kind": "speaks",
      "attributes": {}
    },
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      "to": "model-transport:anthropic-messages",
      "kind": "speaks",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:pikiclaw.core@current",
      "to": "model-transport:anthropic-messages",
      "kind": "speaks",
      "attributes": {}
    },
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      "to": "model-transport:anthropic-messages",
      "kind": "speaks",
      "attributes": {}
    },
    {
      "from": "model:claude-fable-5@current",
      "to": "model-transport:anthropic-messages",
      "kind": "speaks"
    },
    {
      "from": "model:claude-haiku-4-5@current",
      "to": "model-transport:anthropic-messages",
      "kind": "speaks"
    },
    {
      "from": "model:claude-mythos-5@current",
      "to": "model-transport:anthropic-messages",
      "kind": "speaks"
    },
    {
      "from": "model:claude-mythos-preview@current",
      "to": "model-transport:anthropic-messages",
      "kind": "speaks"
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      "to": "model-transport:anthropic-messages",
      "kind": "speaks"
    },
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      "to": "model-transport:anthropic-messages",
      "kind": "speaks"
    },
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      "to": "model-transport:anthropic-messages",
      "kind": "speaks"
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      "to": "model-transport:anthropic-messages",
      "kind": "speaks"
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    {
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      "to": "model-transport:anthropic-messages",
      "kind": "speaks"
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      "kind": "speaks"
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      "kind": "speaks"
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      "kind": "speaks"
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      "to": "model-transport:anthropic-messages",
      "kind": "speaks"
    },
    {
      "from": "transport-proxy:adapters-proxy",
      "to": "model-transport:anthropic-messages",
      "kind": "bridges",
      "attributes": {
        "direction": "src"
      }
    }
  ]
}