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diff --git a/Omni/Agent/Core.hs b/Omni/Agent/Core.hs
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+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+
+-- : out omni-agent-core
+module Omni.Agent.Core where
+
+import Alpha
+import Data.Aeson (FromJSON, ToJSON)
+
+-- | Status of a worker agent
+data WorkerStatus
+  = Idle
+  | Syncing
+  | Working Text -- ^ Task ID
+  | Submitting Text -- ^ Task ID
+  | Error Text -- ^ Error message
+  deriving (Show, Eq, Generic)
+
+instance ToJSON WorkerStatus
+instance FromJSON WorkerStatus
+
+-- | Representation of a worker agent
+data Worker = Worker
+  { workerName :: Text
+  , workerPid :: Maybe Int
+  , workerStatus :: WorkerStatus
+  , workerPath :: FilePath
+  }
+  deriving (Show, Eq, Generic)
+
+instance ToJSON Worker
+instance FromJSON Worker