{
  "id": "agent-runtime-impl:a5c.runtime@current",
  "_kind": "AgentRuntimeImpl",
  "_file": "agent-stack/runtime-impls/a5c-runtime-current.yaml",
  "_cluster": "agent-stack",
  "attributes": {
    "displayName": "a5c Unified Runtime (current) — unified tool host",
    "agentVersionId": "agent-version:a5c@current",
    "subagentDispatchMechanism": "agent-as-tool",
    "subagentChildSessionPolicy": "ephemeral-child-session",
    "subagentToolScopePolicy": "inherit-parent",
    "packageRef": "source-ref:a5c-cli",
    "builtInTools": [
      "tool-descriptor:read",
      "tool-descriptor:write",
      "tool-descriptor:edit",
      "tool-descriptor:bash",
      "tool-descriptor:glob",
      "tool-descriptor:grep",
      "tool-descriptor:agent",
      "tool-descriptor:notebook-edit",
      "tool-descriptor:todo-write",
      "tool-descriptor:web-fetch",
      "tool-descriptor:web-search"
    ],
    "toolRegistryDiscovery": "dynamic-extension-loaded",
    "hookSockets": [],
    "internalSessionStateLocation": "~/.a5c/sessions/",
    "sessionFileFormat": "jsonl",
    "sessionFilePathConvention": "~/.a5c/sessions/<sessionId>.jsonl",
    "approvalGatingPrimitive": "per-call",
    "subprocessSandboxStrategy": "invocation-mode",
    "runtimeIdentity": "host-process",
    "supportedMCPTransports": [
      "mcp-transport:stdio",
      "mcp-transport:streamable-http",
      "mcp-transport:http-sse"
    ],
    "supportsStreaming": true,
    "supportedAgentControlVerbs": [
      "interrupt",
      "abort",
      "cancel",
      "pause",
      "resume",
      "yield",
      "checkpoint"
    ],
    "ioSurfaceKinds": [
      "filesystem",
      "terminal-shell",
      "browser-dom",
      "clipboard"
    ],
    "agentMemoryKinds": [
      "conversation-buffer",
      "tool-state"
    ],
    "userInputRequiredPolicy": "breakpoint-mediated",
    "secretHandlingPolicy": "env-allowlist",
    "tokenAccountingSemantics": "mixed-prefer-absolute",
    "pluginDiscoverySource": [
      "marketplaceManifest",
      "localPath",
      "remoteUrl",
      "gitRepo"
    ],
    "subagentToolInheritance": "allowlist",
    "skillScopePrecedence": [
      "personal",
      "project",
      "plugin"
    ],
    "liveChangeDetection": true,
    "disableSkillShellExecutionSupported": false,
    "outputGuardMechanism": "task-output-schema",
    "notes": "a5c runtime is the Layer-5 unified contract for tool hosting, session\nstate, approval, streaming, and extension-loaded tools. It is compatible\nwith the legacy Pi runtime profile (read/write/edit/bash tools, per-call\napproval, stdio MCP, API-key backed sessions) but is not built on Pi. Pi is\none compatibility profile within the wider a5c runtime envelope, alongside\nClaude/Codex/Gemini/OpenCode/LangGraph-style runtime profiles.\n"
  },
  "outgoingEdges": [
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "layer:5-agent-runtime",
      "kind": "realizes",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "agent:a5c",
      "kind": "composes",
      "attributes": {
        "role": "runtime"
      }
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "tool-descriptor:read",
      "kind": "bundles",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "tool-descriptor:write",
      "kind": "bundles",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "tool-descriptor:edit",
      "kind": "bundles",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "tool-descriptor:bash",
      "kind": "bundles",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "tool-descriptor:glob",
      "kind": "bundles",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "tool-descriptor:grep",
      "kind": "bundles",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "tool-descriptor:agent",
      "kind": "bundles",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "tool-descriptor:notebook-edit",
      "kind": "bundles",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "tool-descriptor:todo-write",
      "kind": "bundles",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "tool-descriptor:web-fetch",
      "kind": "bundles",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "tool-descriptor:web-search",
      "kind": "bundles",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "mcp-transport:stdio",
      "kind": "connects",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "mcp-transport:streamable-http",
      "kind": "connects",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "mcp-transport:http-sse",
      "kind": "connects",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "permission-mode:a5c-interactive",
      "kind": "operates_in_permission_mode",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "permission-mode:a5c-non-interactive",
      "kind": "operates_in_permission_mode",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "output-guard:babysitter-task-output-schema",
      "kind": "output_guard_applied_by",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "journal-event:babysitter-run-created",
      "kind": "emits_journal_event",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "journal-event:babysitter-run-completed",
      "kind": "emits_journal_event",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "journal-event:babysitter-run-failed",
      "kind": "emits_journal_event",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "journal-event:babysitter-effect-requested",
      "kind": "emits_journal_event",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "journal-event:babysitter-task-start",
      "kind": "emits_journal_event",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "journal-event:babysitter-task-complete",
      "kind": "emits_journal_event",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "journal-event:babysitter-step-dispatch",
      "kind": "emits_journal_event",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "capability:supports-tool-use",
      "kind": "supports",
      "attributes": {
        "versionRange": "*",
        "level": "full",
        "notes": "Built-in and dynamically-loaded tools cover the Pi runtime surface and\nbroader same-layer runtime alternatives.\n"
      }
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "capability:requires-tool-approval",
      "kind": "supports",
      "attributes": {
        "versionRange": "*",
        "level": "full",
        "notes": "Per-call approval is the compatibility baseline; stricter policy-engine\nand host-specific approval modes can be layered by capability profile.\n"
      }
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "capability:supports-mcp",
      "kind": "supports",
      "attributes": {
        "versionRange": "*",
        "level": "full",
        "notes": "Supports stdio and streamable/http-sse MCP transports, including the\nPi-compatible stdio profile.\n"
      }
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "capability:can-resume",
      "kind": "supports",
      "attributes": {
        "versionRange": "*",
        "level": "full",
        "notes": "a5c keeps normalized session records and can map Pi JSONL-tree or other\nbackend session formats into its session envelope.\n"
      }
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "capability:streaming",
      "kind": "supports",
      "attributes": {
        "versionRange": "*",
        "level": "full"
      }
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "mcp-transport:stdio",
      "kind": "speaks",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "mcp-transport:streamable-http",
      "kind": "speaks",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:a5c.runtime@current",
      "to": "mcp-transport:http-sse",
      "kind": "speaks",
      "attributes": {}
    }
  ],
  "incomingEdges": [
    {
      "from": "agent-version:a5c@current",
      "to": "agent-runtime-impl:a5c.runtime@current",
      "kind": "composed_of",
      "attributes": {
        "role": "runtime"
      }
    },
    {
      "from": "claim:a5c-research-sdk-package-current",
      "to": "agent-runtime-impl:a5c.runtime@current",
      "kind": "about_subject"
    },
    {
      "from": "mcp-transport:http-sse",
      "to": "agent-runtime-impl:a5c.runtime@current",
      "kind": "spoken_by",
      "attributes": {}
    },
    {
      "from": "mcp-transport:stdio",
      "to": "agent-runtime-impl:a5c.runtime@current",
      "kind": "spoken_by",
      "attributes": {}
    },
    {
      "from": "mcp-transport:streamable-http",
      "to": "agent-runtime-impl:a5c.runtime@current",
      "kind": "spoken_by",
      "attributes": {}
    },
    {
      "from": "journal-event:babysitter-run-created",
      "to": "agent-runtime-impl:a5c.runtime@current",
      "kind": "journal_event_emitted_by",
      "attributes": {}
    },
    {
      "from": "journal-event:babysitter-run-completed",
      "to": "agent-runtime-impl:a5c.runtime@current",
      "kind": "journal_event_emitted_by",
      "attributes": {}
    },
    {
      "from": "journal-event:babysitter-run-failed",
      "to": "agent-runtime-impl:a5c.runtime@current",
      "kind": "journal_event_emitted_by",
      "attributes": {}
    },
    {
      "from": "journal-event:babysitter-effect-requested",
      "to": "agent-runtime-impl:a5c.runtime@current",
      "kind": "journal_event_emitted_by",
      "attributes": {}
    },
    {
      "from": "journal-event:babysitter-task-start",
      "to": "agent-runtime-impl:a5c.runtime@current",
      "kind": "journal_event_emitted_by",
      "attributes": {}
    },
    {
      "from": "journal-event:babysitter-task-complete",
      "to": "agent-runtime-impl:a5c.runtime@current",
      "kind": "journal_event_emitted_by",
      "attributes": {}
    },
    {
      "from": "journal-event:babysitter-step-dispatch",
      "to": "agent-runtime-impl:a5c.runtime@current",
      "kind": "journal_event_emitted_by",
      "attributes": {}
    }
  ]
}