QA: Sub-Agents — Microsoft Agent Framework (.NET)

Prerequisites

• Demo is deployed and accessible at /demos/subagents on the dashboard host
• .NET agent backend is healthy (/api/health); GitHubToken (or equivalent) is set so the OpenAI client can authenticate; the /subagents AG-UI endpoint is mounted in agent/Program.cs

Test Steps

1. Basic Functionality

• Navigate to /demos/subagents; verify the page renders within 3s with the delegation log on the left and the CopilotChat pane on the right
• Verify data-testid="delegation-log" is visible with heading "Delegation log" and an empty-state message reading "No delegations yet. Ask the supervisor to plan a deliverable."
• Verify the chat input placeholder is "Ask the supervisor to plan, draft, or critique..."
• Verify both suggestion pills are visible with verbatim titles: "Quick brief", "Marketing post"
• Send "Hello! What can you do?"; verify an assistant reply appears within 10s describing the three sub-agents

2. Feature-Specific Checks

Single Sub-Agent Delegation

• Send "Use the research sub-agent to give me 3 facts about pair programming."; within 30s verify a data-testid="delegation-entry" is rendered with data-status="completed", the "Research" badge, and a non-empty result body containing 3 bullet-style lines
• Verify the assistant chat reply summarizes the research result in one or two short sentences

Live Running -> Completed Transition

• Click the "Quick brief" suggestion; immediately observe the delegation log
• Verify at least one data-testid="delegation-entry" appears with data-status="running", the spinner is visible, and the "Sub-agent is working…" message is shown
• Within 60s verify the same entry transitions to data-status="completed" and the spinner is replaced with the actual result text
• Verify subsequent delegations append additional entries (the list grows; earlier entries are not removed)

Sequential Pipeline (Research -> Write -> Critique)

• Click the "Marketing post" suggestion; within 90s verify the delegation log contains at least 3 data-testid="delegation-entry" rows in this order: Research, Writing, Critique
• Verify each entry's data-status ends as completed (no failed rows under normal conditions)
• Verify the assistant chat reply concisely summarizes the work and references the critique output

Failure Path (Optional / Best Effort)

• If you can intentionally provoke an upstream failure (e.g. revoke the API key briefly, or disable network egress for the .NET backend container), trigger a delegation; verify the entry's data-status="failed" and the failure message is rendered in red
• Verify the assistant surfaces the failure briefly to the user instead of fabricating a result

3. Error Handling

• Send an empty message; verify it is a no-op (no user bubble, no assistant response, no new delegation entries)
• Send a non-task message ("hi"); verify the agent responds without invoking any sub-agent (no new delegation entries appear)
• Verify DevTools -> Console shows no uncaught errors during any flow above

Expected Results

• Page loads within 3 seconds
• Single-sub-agent delegations complete within 30 seconds; full Research -> Write -> Critique chains complete within 90 seconds
• Each delegation row shows a visible running -> completed (or failed) transition; the running spinner is rendered while the secondary chat-client call is in flight
• Failed sub-agent calls are reported as failed rows with a structured error message — never silently turned into completed rows with garbage results
• No UI layout breaks, no uncaught console errors