{
  "id": "agent-runtime-impl:pi.runtime@current",
  "_kind": "AgentRuntimeImpl",
  "_file": "agent-stack/runtime-impls/pi-runtime-current.yaml",
  "_cluster": "agent-stack",
  "attributes": {
    "displayName": "Pi Runtime (current)",
    "agentVersionId": "agentVersion:pi:ge-0-75-5",
    "subagentDispatchMechanism": "none",
    "packageRef": "source-ref:pi-github",
    "builtInTools": [
      "tool-descriptor:read",
      "tool-descriptor:write",
      "tool-descriptor:edit",
      "tool-descriptor:bash"
    ],
    "toolRegistryDiscovery": "static-bundled",
    "hookSockets": [],
    "internalSessionStateLocation": "~/.pi/agent/sessions/",
    "sessionFileFormat": "jsonl-tree",
    "sessionFilePathConvention": "~/.pi/agent/sessions/<session-id>.jsonl",
    "approvalGatingPrimitive": "per-call",
    "subprocessSandboxStrategy": "none",
    "runtimeIdentity": "api-key",
    "rpcToolOptions": {
      "bash": {
        "excludeFromContext": {
          "supported": true,
          "introducedIn": "0.76.0",
          "notes": "RPC clients can suppress bash command output from the next prompt context."
        }
      }
    },
    "supportedMCPTransports": [
      "mcp-transport:stdio"
    ],
    "supportsStreaming": true,
    "harnessFeatures": {
      "skillInvocation": "Skills are invoked via formatSkillInvocation in the harness layer.\nThe harness formats skill calls into the agent loop and dispatches\nthem as structured tool-use interactions.\n",
      "promptTemplates": "Pi's harness includes a prompt-template system for composing system\nprompts, tool descriptions, and context injection. Templates are\nparameterized and resolved at session start.\n",
      "compaction": "The AgentHarness implements branch-summarization compaction. When\ncontext window usage exceeds a configurable threshold, older\nconversation branches are summarized and replaced with condensed\nrepresentations. Settings include threshold percentage and\nsummarization strategy.\n",
      "sessionManagement": "Session state is managed by the harness with JSONL-tree persistence.\nSessions support resume, fork, and branch operations. The harness\ntracks conversation structure as a tree of turns.\nPi 0.76.0 adds `--session-id <id>` so callers can create or resume\nan exact project-local session instead of relying only on env state.\n",
      "executionEnvironment": "The harness provides an execution-env abstraction layer that\nnormalizes OS, shell, and filesystem access across platforms.\nTool implementations (bash, read, write, edit) are dispatched\nthrough this abstraction.\n",
      "rpcBashContextControl": "Pi 0.76.0 RPC mode accepts `excludeFromContext` on `bash`.\nWhen true, command output is returned to the RPC caller but omitted\nfrom context sent with the next model prompt.\n"
    }
  },
  "outgoingEdges": [
    {
      "from": "agent-runtime-impl:pi.runtime@current",
      "to": "layer:5-agent-runtime",
      "kind": "realizes",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:pi.runtime@current",
      "to": "agent:pi",
      "kind": "composes",
      "attributes": {
        "role": "runtime"
      }
    },
    {
      "from": "agent-runtime-impl:pi.runtime@current",
      "to": "tool-descriptor:read",
      "kind": "bundles",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:pi.runtime@current",
      "to": "tool-descriptor:write",
      "kind": "bundles",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:pi.runtime@current",
      "to": "tool-descriptor:edit",
      "kind": "bundles",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:pi.runtime@current",
      "to": "tool-descriptor:bash",
      "kind": "bundles",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:pi.runtime@current",
      "to": "mcp-transport:stdio",
      "kind": "connects",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:pi.runtime@current",
      "to": "capability:supports-mcp",
      "kind": "supports",
      "attributes": {
        "versionRange": ">=1.0.0",
        "level": "full",
        "notes": "MCP via stdio.\n"
      }
    },
    {
      "from": "agent-runtime-impl:pi.runtime@current",
      "to": "compaction-policy:pi-coding-agent",
      "kind": "compaction_policy_applied_by",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:pi.runtime@current",
      "to": "output-guard:pi-coding-agent",
      "kind": "output_guard_applied_by",
      "attributes": {}
    },
    {
      "from": "agent-runtime-impl:pi.runtime@current",
      "to": "mcp-transport:stdio",
      "kind": "speaks",
      "attributes": {}
    }
  ],
  "incomingEdges": [
    {
      "from": "agentVersion:pi:ge-0-75-5",
      "to": "agent-runtime-impl:pi.runtime@current",
      "kind": "composed_of",
      "attributes": {
        "role": "runtime"
      }
    },
    {
      "from": "agentVersion:pi:ge-0-75-5",
      "to": "agent-runtime-impl:pi.runtime@current",
      "kind": "composed_of",
      "attributes": {
        "role": "runtime"
      }
    },
    {
      "from": "agent-version:pi-sdk@current",
      "to": "agent-runtime-impl:pi.runtime@current",
      "kind": "composed_of",
      "attributes": {
        "role": "runtime"
      }
    },
    {
      "from": "mcp-transport:stdio",
      "to": "agent-runtime-impl:pi.runtime@current",
      "kind": "spoken_by",
      "attributes": {}
    }
  ]
}