Fix inbox creation issues in agent coordinator

- Fixed Task.new/3 to handle both maps and keyword lists
- Added robust inbox existence checking in find_available_agent
- Ensure inbox creation during agent registration and task assignment
- Add helper function ensure_inbox_exists to avoid crashes

scripts/test_mcp_server.exs

@@ -0,0 +1,149 @@
+#!/usr/bin/env elixir
+
+# Simple test script to demonstrate MCP server functionality
+Mix.install([
+  {:jason, "~> 1.4"}
+])
+
+# Start the agent coordinator application
+Application.ensure_all_started(:agent_coordinator)
+
+alias AgentCoordinator.MCPServer
+
+IO.puts("🚀 Testing Agent Coordinator MCP Server")
+IO.puts("=" |> String.duplicate(50))
+
+# Test 1: Get tools list
+IO.puts("\n📋 Getting available tools...")
+tools_request = %{"method" => "tools/list", "jsonrpc" => "2.0", "id" => 1}
+tools_response = MCPServer.handle_mcp_request(tools_request)
+
+case tools_response do
+  %{"result" => %{"tools" => tools}} ->
+    IO.puts("✅ Found #{length(tools)} tools:")
+    Enum.each(tools, fn tool ->
+      IO.puts("   - #{tool["name"]}: #{tool["description"]}")
+    end)
+  error ->
+    IO.puts("❌ Error getting tools: #{inspect(error)}")
+end
+
+# Test 2: Register an agent
+IO.puts("\n👤 Registering test agent...")
+register_request = %{
+  "method" => "tools/call",
+  "params" => %{
+    "name" => "register_agent",
+    "arguments" => %{
+      "name" => "DemoAgent",
+      "capabilities" => ["coding", "testing"]
+    }
+  },
+  "jsonrpc" => "2.0",
+  "id" => 2
+}
+
+register_response = MCPServer.handle_mcp_request(register_request)
+
+agent_id = case register_response do
+  %{"result" => %{"content" => [%{"text" => text}]}} ->
+    data = Jason.decode!(text)
+    IO.puts("✅ Agent registered: #{data["agent_id"]}")
+    data["agent_id"]
+  error ->
+    IO.puts("❌ Error registering agent: #{inspect(error)}")
+    nil
+end
+
+if agent_id do
+  # Test 3: Create a task
+  IO.puts("\n📝 Creating a test task...")
+  task_request = %{
+    "method" => "tools/call",
+    "params" => %{
+      "name" => "create_task",
+      "arguments" => %{
+        "title" => "Demo Task",
+        "description" => "A demonstration task for the MCP server",
+        "priority" => "high",
+        "required_capabilities" => ["coding"]
+      }
+    },
+    "jsonrpc" => "2.0",
+    "id" => 3
+  }
+
+  task_response = MCPServer.handle_mcp_request(task_request)
+
+  case task_response do
+    %{"result" => %{"content" => [%{"text" => text}]}} ->
+      data = Jason.decode!(text)
+      IO.puts("✅ Task created: #{data["task_id"]}")
+      if data["assigned_to"] do
+        IO.puts("   Assigned to: #{data["assigned_to"]}")
+      end
+    error ->
+      IO.puts("❌ Error creating task: #{inspect(error)}")
+  end
+
+  # Test 4: Get task board
+  IO.puts("\n📊 Getting task board...")
+  board_request = %{
+    "method" => "tools/call",
+    "params" => %{
+      "name" => "get_task_board",
+      "arguments" => %{}
+    },
+    "jsonrpc" => "2.0",
+    "id" => 4
+  }
+
+  board_response = MCPServer.handle_mcp_request(board_request)
+
+  case board_response do
+    %{"result" => %{"content" => [%{"text" => text}]}} ->
+      data = Jason.decode!(text)
+      IO.puts("✅ Task board retrieved:")
+      Enum.each(data["agents"], fn agent ->
+        IO.puts("   Agent: #{agent["name"]} (#{agent["agent_id"]})")
+        IO.puts("   Capabilities: #{Enum.join(agent["capabilities"], ", ")}")
+        IO.puts("   Status: #{agent["status"]}")
+        if agent["current_task"] do
+          IO.puts("   Current Task: #{agent["current_task"]["title"]}")
+        else
+          IO.puts("   Current Task: None")
+        end
+        IO.puts("   Pending: #{agent["pending_tasks"]} | Completed: #{agent["completed_tasks"]}")
+        IO.puts("")
+      end)
+    error ->
+      IO.puts("❌ Error getting task board: #{inspect(error)}")
+  end
+
+  # Test 5: Send heartbeat
+  IO.puts("\n💓 Sending heartbeat...")
+  heartbeat_request = %{
+    "method" => "tools/call",
+    "params" => %{
+      "name" => "heartbeat",
+      "arguments" => %{
+        "agent_id" => agent_id
+      }
+    },
+    "jsonrpc" => "2.0",
+    "id" => 5
+  }
+
+  heartbeat_response = MCPServer.handle_mcp_request(heartbeat_request)
+
+  case heartbeat_response do
+    %{"result" => %{"content" => [%{"text" => text}]}} ->
+      data = Jason.decode!(text)
+      IO.puts("✅ Heartbeat sent: #{data["status"]}")
+    error ->
+      IO.puts("❌ Error sending heartbeat: #{inspect(error)}")
+  end
+end
+
+IO.puts("\n🎉 MCP Server testing completed!")
+IO.puts("=" |> String.duplicate(50))