[WIP]Oi

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Oi means Orchid integration — lightweight glue layer between Orchid workflows and OrchidSymbiont runtimes.

Core concepts

  • Workspace — pure data struct holding graph, cluster, interventions. No process, no GenServer. Compiled and dispatched via pure functions.

  • Compile + Dispatch — two-phase pipeline:

    1. Oi.compile/1 — topology → static bundles (reusable)
    2. Oi.dispatch/2 — bind interventions → plan → execute via pluggable executor

  • Executor — pluggable task execution strategy. Built-in: Sync (serial), TaskSup (Task.Supervisor), Pool (NimblePool).

  • Session — optional process tree per tenant, wrapping OrchidSymbiont.Runtime for multi-tenant isolation.

Quick start

Define a step

defmodule MyApp.Steps.Upcase do
  use Oi.Step, name: :upcase

  manifest(
    inputs: [:text],
    outputs: [result: :string]
  )

  routine text, _opts do
    text |> String.upcase() |> ok()
  end
end

Build and run

alias Oi.Topology.Graph
alias Oi.Topology.Graph.{Node, Edge}

graph =
  Graph.new()
  |> Graph.add_node(%Node{
    id: :up, container: MyApp.Steps.Upcase,
    inputs: [:text], outputs: [:result]
  })

ws = Oi.Workspace.new("demo", graph)
{:ok, ws} = Oi.compile(ws)
{:ok, ws} = Oi.dispatch(ws,
  interventions: %{{:port, :up, :text} => {:input, "hello"}}
)

ws.drafting.memory  # => %{"up|result" => "HELLO"}

Multi-tenant with Session

Oi.Session.start("tenant-1")
Oi.Session.start("tenant-2")

ws = Oi.Workspace.new("tenant-1", graph)
{:ok, ws} = Oi.compile(ws)
{:ok, ws} = Oi.dispatch(ws,
  executor: Oi.Executor.TaskSup,
  executor_opts: [sup: Oi.Session.tasks_tuple("tenant-1")]
)

Symbiont step

defmodule MyApp.Steps.Predict do
  use Oi.Step, name: :predict, symbiont?: true

  manifest(
    inputs: [:features],
    outputs: [prediction: :string],
    models: [:model]
  )

  routine features, models, _opts do
    {:ok, result} = OrchidSymbiont.call(models.model, {:predict, features})
    ok(result)
  end
end

License

MIT