Behaviour for external compute backends (ALTAR, Snakepit, etc.).

External compute backends allow offloading measurement computation to specialized systems:

• ALTAR: Python Celery workers for TDA, ML inference
• Snakepit: LLM workers for semantic analysis, quality scoring

Callbacks

• submit_task/2 - Submit a computation task
• await_result/2 - Poll for task completion
• cancel_task/1 - Cancel a running task

Example Implementation

defmodule MyBackend do
  @behaviour Forge.Measurement.ExternalCompute

  def submit_task(task_name, params) do
    # Submit to backend
    {:ok, "task-uuid-123"}
  end

  def await_result(task_id, opts) do
    # Poll for result
    {:ok, %{result: "computed"}}
  end

  def cancel_task(task_id) do
    :ok
  end
end