{
  "id": "agent-core-impl:a5c.core@current",
  "_kind": "AgentCoreImpl",
  "_file": "agent-stack/core-impls/a5c-core-current.yaml",
  "_cluster": "agent-stack",
  "attributes": {
    "displayName": "a5c Unified Core (current) — unified agent loop",
    "agentVersionId": "agent-version:a5c@current",
    "packageRef": "source-ref:a5c-cli",
    "loopIteratorPolicy": "custom",
    "loopIteratorNotes": "a5c's core is modeled as a native compatibility layer for agent loops, not\nas a wrapper built on top of Pi or any single backend. It can present the\nPi-compatible serialized tool-use loop while also normalizing Claude Code,\nCodex, Gemini, OpenCode, LangGraph/custom graph, and adapters style loop\nsemantics behind the same AgentCoreImpl contract.\n",
    "contextManagementStrategy": "platform-managed",
    "compactionTriggerNotes": "a5c owns the compatibility contract for context and compaction metadata at\nthe platform boundary. Individual backends may use provider-managed,\nrolling-summary, server-managed, or user-managed context; a5c maps those\npostures into one platform-managed profile so legacy Pi-style definitions\nand newer graph/custom-agent definitions remain comparable.\n",
    "subagentInvokerPolicy": "platform-mediated",
    "subagentInvokerNotes": "Subagent dispatch is mediated by the a5c platform contract. Pi-style\ntool-call handoff, Claude-style subagents, LangGraph subgraphs/supervisors,\nand skill-as-tool execution all normalize to platform-mediated child work\nwithout making a5c depend on any one mechanism.\n",
    "resultSynthesisPolicy": "post-processed",
    "resultSynthesisNotes": "a5c synthesizes a normalized result envelope from backend-native terminal\nmessages, graph terminal state, streamed text, tool results, and generated\nartifacts. Pi's model-direct final text is a supported profile, not the\nbase implementation.\n",
    "stopDetectionStrategy": "structured-end-event",
    "transportClientLibrary": "a5c-unified-transport",
    "supportedTransportProtocols": [
      "model-transport:anthropic-messages",
      "model-transport:openai-responses",
      "model-transport:openai-chat-completions",
      "model-transport:gemini-generate-content",
      "model-transport:openai-compat",
      "model-transport:openrouter",
      "model-transport:github-copilot"
    ],
    "parallelToolCallHandling": "native",
    "programmaticToolCalling": "optional",
    "programmaticToolCallingNotes": "a5c agent-core can optionally expose `code_executor`, a Code Mode /\nProgrammatic Tool Calling surface inspired by UTCP Code-Mode and Open-PTC.\nThe executor runs a bounded JavaScript tool chain against the configured\nagent-core tools so a model can batch discovery, schema fetches, filesystem,\nshell, web, and host tools behind one model-level call.\n",
    "streamingFidelity": "full",
    "thinkingChannelHandling": "model-dependent",
    "streamingBlocks": [
      "text",
      "thinking",
      "tool_use"
    ],
    "effortLevelDelegation": "passthrough-to-harness",
    "notes": "This node is intentionally the Layer-4 unified contract for a5c. It is\ncapability-compatible with the legacy Pi wrapper's core definition\n(Anthropic/OpenAI transports, tool-use loop, structured end events,\nsequential tool handling) while also covering same-layer alternatives that\nexpose parallel tool calls, graph-defined loops, server-managed loops, or\nprovider-specific thinking channels. Pi is a compatibility target, not an implementation base. Compatibility is modeled as a native a5c contract; there is no depends_on edge to Pi.\n"
  },
  "outgoingEdges": [
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "layer:4-agent-core",
      "kind": "realizes",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "agent:a5c",
      "kind": "composes",
      "attributes": {
        "role": "core"
      }
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "model-transport:anthropic-messages",
      "kind": "speaks",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "model-transport:openai-responses",
      "kind": "speaks",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "model-transport:openai-chat-completions",
      "kind": "speaks",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "model-transport:gemini-generate-content",
      "kind": "speaks",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "model-transport:openai-compat",
      "kind": "speaks",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "model-transport:openrouter",
      "kind": "speaks",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "model-transport:github-copilot",
      "kind": "speaks",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "capability:supports-tool-use",
      "kind": "supports",
      "attributes": {
        "versionRange": "*",
        "level": "full",
        "notes": "Covers Pi-compatible serialized tool calls and richer same-layer tool\ndispatch profiles through the unified a5c core contract.\n"
      }
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "capability:parallel-tool-calls",
      "kind": "supports",
      "attributes": {
        "versionRange": "*",
        "level": "full",
        "notes": "a5c can expose native parallel handling where the selected backend or\ngraph profile supports it, while preserving Pi-compatible sequential\ndispatch as a constrained compatibility mode.\n"
      }
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "capability:programmatic-tool-calling",
      "kind": "supports",
      "attributes": {
        "versionRange": "*",
        "level": "optional",
        "notes": "Implemented as the opt-in agent-core `code_executor` tool. It presents\nthe existing a5c agent-core tool surface to generated code through\n`tools.<name>(params)` and `callTool(name, params)` helpers.\n"
      }
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "capability:streaming",
      "kind": "supports",
      "attributes": {
        "versionRange": "*",
        "level": "full",
        "notes": "Normalizes streamed text, tool-call deltas, graph events, and terminal\nresult envelopes across supported same-layer core alternatives.\n"
      }
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "capability:can-multi-turn",
      "kind": "supports",
      "attributes": {
        "versionRange": "*",
        "level": "full",
        "notes": "Multi-turn is the substrate's default; a5c maintains the journal across\nrun iterations and resumes via AGENT_SESSION_ID.\n"
      }
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "capability:supports-thinking",
      "kind": "supports",
      "attributes": {
        "versionRange": "*",
        "level": "full",
        "notes": "Thinking blocks pass through the a5c-unified-transport unchanged when\nthe bridged backend emits them (thinkingChannelHandling=model-dependent).\n"
      }
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "source-ref:a5c-cli",
      "kind": "depends_on",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "hook-surface:phase-change",
      "kind": "fires_hook",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "hook-surface:phase-change-check",
      "kind": "fires_hook",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "hook-surface:wake",
      "kind": "fires_hook",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "hook-surface:decision-point",
      "kind": "fires_hook",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "hook-surface:start",
      "kind": "fires_hook",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "hook-surface:done",
      "kind": "fires_hook",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "hook-surface:session-start",
      "kind": "fires_hook",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "hook-surface:session-end",
      "kind": "fires_hook",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "hook-surface:stop",
      "kind": "fires_hook",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "hook-surface:pre-tool-use",
      "kind": "fires_hook",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "hook-surface:post-tool-use",
      "kind": "fires_hook",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "orch-primitive:agent-selection",
      "kind": "supports_orchestration_primitive",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "orch-primitive:context-injection",
      "kind": "supports_orchestration_primitive",
      "attributes": {}
    },
    {
      "from": "agent-core-impl:a5c.core@current",
      "to": "orch-primitive:telemetry-collection",
      "kind": "supports_orchestration_primitive",
      "attributes": {}
    }
  ],
  "incomingEdges": [
    {
      "from": "agent-version:a5c@current",
      "to": "agent-core-impl:a5c.core@current",
      "kind": "composed_of",
      "attributes": {
        "role": "core"
      }
    },
    {
      "from": "claim:a5c-research-unified-transport-profile",
      "to": "agent-core-impl:a5c.core@current",
      "kind": "about_subject"
    }
  ]
}