q792602257andClaude Opus 4.6 2f8f4a36c6 docs(superpowers): add host-agent MCP server design spec
Design for mounting a Streamable HTTP MCP server inside the host-agent
process so Hermes Agent (or any MCP client) can drive devices directly.
Reuses the existing console FastAPI + uvicorn on port 8765, adds bearer-
token auth, per-device session-level locks with 60s TTL, and cloud
coordination via a new heartbeat field. Cloud scheduler skips devices
reported as MCP-busy.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-07-21 13:47:15 +08:00

Device Agent Runtime

Device Agent Runtime is a device-agnostic runtime for LLM-driven automation. It gives agents a stable way to observe, decide, and act against real devices through a small set of domain models, driver contracts, tools, perception providers, and runtime orchestration.

iPhone automation through WebDriverAgent/Appium is the first driver, not the platform boundary. Future drivers can target Android, browsers, desktop environments, or other device surfaces without changing the runtime's core contracts.

Current Shape

  • core/: shared domain models and runtime errors.
  • driver/: the Driver contract, concrete driver adapters, and driver-type registry.
  • device/: device lifecycle and active driver management.
  • tools/: device capabilities exposed to Runtime and adapter layers.
  • perception/: screen-to-Scene perception behind PerceptionProvider.
  • runtime/: planning and execution orchestration.
  • api/: MCP and supporting integration adapters.
  • storage/: timeline, task, and device configuration persistence.
  • packages/cloud-platform/: cloud scheduling, device pooling, plugins, and the Python cloud SDK as the device-cloud-platform workspace member.
  • apps/cloud-api/: deployable authenticated Cloud Control Plane with PostgreSQL/SQLite persistence, scheduling, leases, and health endpoints.
  • apps/device-host-agent/: outbound Host Agent that synchronizes configured devices and executes leased tasks through the existing Runtime/workflow.

Python Workspace

The repository uses a uv workspace with one committed lockfile. From the repository root, synchronize every Python member with:

uv sync --locked --all-packages

Run the complete local test suite in a workspace environment:

uv run --all-packages pytest -m "not integration"

Select one member when running package-specific commands:

uv run --package device-agent-runtime python -c "import runtime"
uv run --package device-cloud-platform python -c "import cloud"
uv run --package device-cloud-api device-cloud-api --help
uv run --package device-host-agent device-host-agent --help
uv build --package device-agent-runtime
uv build --package device-cloud-platform

Runtime is an in-process execution library, not a standalone HTTP service. The Host Agent console at http://127.0.0.1:8765/tasks is the authenticated operator view for the tasks that actually execute on that Host, including per-step screenshots, OCR observations, and UI-tree results. The Cloud Console remains the fleet-level view for dispatch status and Cloud-proxy planner history.

Project Direction

The durable roadmap is in docs/ROADMAP.md. The architecture invariants future changes must preserve are in docs/CONSTITUTION.md.

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