chore: import upstream snapshot with attribution

apps/sim/executor/handlers/registry.ts

@@ -0,0 +1,51 @@
+/**
+ * Handler Registry
+ *
+ * Central registry for all block handlers.
+ * Creates handlers for real user blocks (not infrastructure like sentinels).
+ */
+
+import { AgentBlockHandler } from '@/executor/handlers/agent/agent-handler'
+import { ApiBlockHandler } from '@/executor/handlers/api/api-handler'
+import { ConditionBlockHandler } from '@/executor/handlers/condition/condition-handler'
+import { CredentialBlockHandler } from '@/executor/handlers/credential/credential-handler'
+import { EvaluatorBlockHandler } from '@/executor/handlers/evaluator/evaluator-handler'
+import { FunctionBlockHandler } from '@/executor/handlers/function/function-handler'
+import { GenericBlockHandler } from '@/executor/handlers/generic/generic-handler'
+import { HumanInTheLoopBlockHandler } from '@/executor/handlers/human-in-the-loop/human-in-the-loop-handler'
+import { MothershipBlockHandler } from '@/executor/handlers/mothership/mothership-handler'
+import { PiBlockHandler } from '@/executor/handlers/pi/pi-handler'
+import { ResponseBlockHandler } from '@/executor/handlers/response/response-handler'
+import { RouterBlockHandler } from '@/executor/handlers/router/router-handler'
+import { TriggerBlockHandler } from '@/executor/handlers/trigger/trigger-handler'
+import { VariablesBlockHandler } from '@/executor/handlers/variables/variables-handler'
+import { WaitBlockHandler } from '@/executor/handlers/wait/wait-handler'
+import { WorkflowBlockHandler } from '@/executor/handlers/workflow/workflow-handler'
+import type { BlockHandler } from '@/executor/types'
+
+/**
+ * Create all block handlers
+ *
+ * Note: Sentinels are NOT included here - they're infrastructure handled
+ * by NodeExecutionOrchestrator, not user blocks.
+ */
+export function createBlockHandlers(): BlockHandler[] {
+  return [
+    new TriggerBlockHandler(),
+    new FunctionBlockHandler(),
+    new ApiBlockHandler(),
+    new ConditionBlockHandler(),
+    new RouterBlockHandler(),
+    new ResponseBlockHandler(),
+    new HumanInTheLoopBlockHandler(),
+    new AgentBlockHandler(),
+    new MothershipBlockHandler(),
+    new PiBlockHandler(),
+    new VariablesBlockHandler(),
+    new WorkflowBlockHandler(),
+    new WaitBlockHandler(),
+    new EvaluatorBlockHandler(),
+    new CredentialBlockHandler(),
+    new GenericBlockHandler(),
+  ]
+}