Intent of agentName when input fields are missing or wrong-typed; still records the spawn|occurrence=1

All 2 exact tests in this concept. Every test is marked by where it enters the hierarchy.

mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/ 2 tests
- platform/ 2 tests
  - agentHost/ 2 tests
    
    test/ 2 tests
    
    node/ 2 tests
    
    claudeSubagentSignals.test|title=claudeSubagentSignals — Phase 12 emission buildTopLevelSubagentReadyAction omits _meta description/ 1 test
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/platform/agentHost/test/node/claudeSubagentSignals.test|title=claudeSubagentSignals — Phase 12 emission buildTopLevelSubagentReadyAction omits _meta description/agentName when input fields are missing or wrong-typed; still records the spawn|occurrence=1 Introduced here
    
    mocha:v1|namespace=vscode@05c208e9e28d8c1c723fa08f85e2b7a96092e8e5|file=vs/platform/agentHost/test/node/claudeAgent.test|title=ClaudeAgent D3: subagent spawn mirrors onto onDidSpawnChat while the subagent signals still flow|occurrence=1 Inherited claudeAgent.ts ×1