{
  "id": "agent-core-impl:claude-code.core@1.x",
  "_kind": "AgentCoreImpl",
  "_file": "agent-stack/core-impls/claude-code-core-1-x.yaml",
  "_cluster": "agent-stack",
  "attributes": {
    "displayName": "Claude Code Core (1.x)",
    "agentVersionId": "agentVersion:claude:ge-0-0-0",
    "packageRef": "source-ref:claude-code-github",
    "loopIteratorPolicy": "tool-use-loop",
    "loopIteratorNotes": "Tool-use loop: each turn the model emits zero or more `tool_use` blocks; the runtime\nexecutes them and appends `tool_result` blocks back into the message list. The loop\nadvances until the model returns an Anthropic Messages `stop_reason: \"end_turn\"`\n(or `\"tool_use\"` after which tools are run and the next turn is fetched). The\nPreCompact hook fires when context approaches the configured threshold and the\nruntime injects a summarized history before the next turn.\n",
    "contextManagementStrategy": "platform-managed",
    "compactionTriggerThresholdTokens": 0,
    "compactionTriggerNotes": "PreCompact hook fires as the conversation approaches the active model's context\nwindow (community-observed at ~70% fill). Vendor docs do not publish an exact\nthreshold; treat the integer field as TODO until Anthropic documents one.\n",
    "subagentInvokerPolicy": "tool-call-handoff",
    "subagentInvokerNotes": "Subagents are invoked via the built-in `Task` tool (a.k.a. the `Agent` tool). The\nparent loop emits a `tool_use` for `Task` with a subagent name + prompt; the runtime\nspawns a nested tool-use loop for the subagent and returns its final assistant text\nas the `tool_result`. Up to 10 subagents can run in parallel.\n",
    "resultSynthesisPolicy": "model-direct",
    "resultSynthesisNotes": "The final assistant text is streamed verbatim to the host as it arrives; on\n`stop_reason: \"end_turn\"` the runtime emits the `Stop` hook (and `SubagentStop`\nfor nested Task invocations) and closes the turn.\n",
    "stopDetectionStrategy": "structured-end-event",
    "transportClientLibrary": "@anthropic-ai/claude-agent-sdk",
    "supportedTransportProtocols": [
      "model-transport:anthropic-messages"
    ],
    "parallelToolCallHandling": "native",
    "streamingFidelity": "full",
    "thinkingChannelHandling": "passthrough",
    "loopBudgetKnobs": [
      "max_turns",
      "max_budget_usd"
    ],
    "compactionTrigger": "both",
    "streamingBlocks": [
      "text",
      "thinking",
      "tool_use"
    ],
    "effortLevelDelegation": "native"
  },
  "outgoingEdges": [
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "agent:claude-code",
      "kind": "composes",
      "attributes": {
        "role": "core"
      }
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "source-ref:claude-code-github",
      "kind": "depends_on",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "model-transport:anthropic-messages",
      "kind": "speaks",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "layer:4-agent-core",
      "kind": "realizes",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "capability:can-multi-turn",
      "kind": "supports",
      "attributes": {
        "versionRange": ">=1.0.0 <2.0.0",
        "level": "full",
        "notes": "Multi-turn conversation is the default; the core maintains\ntranscript state across turns.\n"
      }
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "capability:parallel-tool-calls",
      "kind": "supports",
      "attributes": {
        "versionRange": ">=1.0.0 <2.0.0",
        "level": "full",
        "notes": "The core dispatches parallel tool calls natively when the model\nemits multiple tool_use blocks in a single turn\n(parallelToolCallHandling=native).\n",
        "evidenceSourceIds": [
          "evidence:anthropic-tool-use-2026"
        ]
      }
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "capability:streaming",
      "kind": "supports",
      "attributes": {
        "versionRange": ">=1.0.0 <2.0.0",
        "level": "full",
        "notes": "Claude Code streams model output token-by-token through the core\nloop's transport client.\n"
      }
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "capability:supports-thinking",
      "kind": "supports",
      "attributes": {
        "versionRange": ">=1.2.0 <2.0.0",
        "level": "full",
        "notes": "The core passes thinking blocks through unmodified to the\npresentation layer (thinkingChannelHandling=passthrough).\n",
        "evidenceSourceIds": [
          "evidence:anthropic-claude-code-thinking-2026-01"
        ]
      }
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "capability:supports-tool-use",
      "kind": "supports",
      "attributes": {
        "versionRange": ">=1.0.0 <2.0.0",
        "level": "full",
        "notes": "Claude Code dispatches `tool_use` blocks emitted by the model and\nfeeds back `tool_result` blocks on the next turn.\n"
      }
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "output-guard:claude-code-aup-refusal",
      "kind": "output_guard_applied_by",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "hook-surface:pre-tool-use",
      "kind": "fires_hook",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "hook-surface:post-tool-use",
      "kind": "fires_hook",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "hook-surface:user-prompt-submit",
      "kind": "fires_hook",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "hook-surface:stop",
      "kind": "fires_hook",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "hook-surface:claude.subagent-start",
      "kind": "fires_hook",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "hook-surface:subagent-stop",
      "kind": "fires_hook",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "hook-surface:pre-compact",
      "kind": "fires_hook",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "protocol-message:system-message",
      "kind": "emits_message_type",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "protocol-message:assistant-message",
      "kind": "emits_message_type",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "protocol-message:user-message",
      "kind": "emits_message_type",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "protocol-message:stream-event",
      "kind": "emits_message_type",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "protocol-message:result-message-success",
      "kind": "emits_message_type",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "protocol-message:result-message-error-max-turns",
      "kind": "emits_message_type",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "protocol-message:result-message-error-max-budget-usd",
      "kind": "emits_message_type",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "protocol-message:result-message-error-during-execution",
      "kind": "emits_message_type",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "protocol-message:result-message-error-max-structured-output-retries",
      "kind": "emits_message_type",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "effort-level:low",
      "kind": "supports_effort_level",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "effort-level:medium",
      "kind": "supports_effort_level",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "effort-level:high",
      "kind": "supports_effort_level",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "effort-level:xhigh",
      "kind": "supports_effort_level",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "effort-level:max",
      "kind": "supports_effort_level",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "orch-primitive:agent-dispatch",
      "kind": "supports_orchestration_primitive",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "orch-primitive:budget-stop",
      "kind": "supports_orchestration_primitive",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:claude-code.core@1.x",
      "to": "orch-primitive:result-validation",
      "kind": "supports_orchestration_primitive",
      "attributes": {}
    }
  ],
  "incomingEdges": [
    {
      "from": "agentVersion:claude:ge-0-0-0",
      "to": "agent-core-impl:claude-code.core@1.x",
      "kind": "composed_of",
      "attributes": {
        "role": "core"
      }
    }
  ]
}