feat: Make skill instruction optimizable and can adapt to user tasks

PiperOrigin-RevId: 869971535

tests/unittests/tools/test_skill_toolset.py

@@ -14,7 +14,6 @@
 
 from unittest import mock
 
-from google.adk.models import llm_request
 from google.adk.skills import models
 from google.adk.tools import skill_toolset
 from google.adk.tools import tool_context
@@ -124,32 +123,23 @@ def test_list_skills(mock_skill1, mock_skill2):
 async def test_get_tools(mock_skill1, mock_skill2):
   toolset = skill_toolset.SkillToolset([mock_skill1, mock_skill2])
   tools = await toolset.get_tools()
-  assert len(tools) == 2
-  assert isinstance(tools[0], skill_toolset.LoadSkillTool)
-  assert isinstance(tools[1], skill_toolset.LoadSkillResourceTool)
+  assert len(tools) == 3
+  assert isinstance(tools[0], skill_toolset.ListSkillsTool)
+  assert isinstance(tools[1], skill_toolset.LoadSkillTool)
+  assert isinstance(tools[2], skill_toolset.LoadSkillResourceTool)
 
 
 @pytest.mark.asyncio
-async def test_process_llm_request(
+@pytest.mark.asyncio
+async def test_list_skills_tool(
     mock_skill1, mock_skill2, tool_context_instance
 ):
   toolset = skill_toolset.SkillToolset([mock_skill1, mock_skill2])
-  mock_llm_request = llm_request.LlmRequest()
-  mock_llm_request.config.system_instruction = "existing instruction"
-  await toolset.process_llm_request(
-      tool_context=tool_context_instance, llm_request=mock_llm_request
-  )
-  assert "<available_skills>" in mock_llm_request.config.system_instruction
-  assert (
-      "You can use specialized 'skills'"
-      in mock_llm_request.config.system_instruction
-  )
-  assert (
-      "skills are folders" in mock_llm_request.config.system_instruction.lower()
-  )
-  assert mock_llm_request.config.system_instruction.startswith(
-      "existing instruction"
-  )
+  tool = skill_toolset.ListSkillsTool(toolset)
+  result = await tool.run_async(args={}, tool_context=tool_context_instance)
+  assert "<available_skills>" in result
+  assert "skill1" in result
+  assert "skill2" in result
 
 
 @pytest.mark.asyncio