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# QA: Sub-Agents — AG2
## Prerequisites
- Demo is deployed and accessible at `/demos/subagents`
- Agent backend is healthy (check `/api/copilotkit` GET → `agent_status: reachable`)
- Backend has `OPENAI_API_KEY` set
- The `subagents` supervisor is mounted at `/subagents` on the FastAPI
server (see `src/agent_server.py`)
## Test Steps
### 1. Page renders with delegation log + chat
- [ ] Navigate to `/demos/subagents`
- [ ] Left pane shows the **Delegation log** panel
(`data-testid="delegation-log"`)
- [ ] Header reads "Sub-agent delegations" with a counter
`data-testid="delegation-count"` showing `0 calls`
- [ ] Empty-state copy: "Ask the supervisor to complete a task. Every
sub-agent it calls will appear here."
- [ ] Right pane shows the chat with placeholder
"Give the supervisor a task..."
### 2. Single delegation chain
- [ ] Click suggestion **"Write a blog post"** (or send the equivalent
message).
- [ ] While the supervisor runs, the badge
`data-testid="supervisor-running"` ("Supervisor running") appears in
the header.
- [ ] As the supervisor delegates, entries appear in the log
(`data-testid="delegation-entry"`). Expect at least 3 entries — one
`Research`, one `Writing`, one `Critique` — in that order.
- [ ] Each entry shows:
- A `#N` index, a colored badge with the sub-agent name + emoji.
- A `Task: ...` line summarizing what was delegated.
- A `result` block containing the sub-agent's output (real LLM text,
not placeholders).
- [ ] Counter updates to `3 calls` (or more if the supervisor iterated).
### 3. Independent delegations
- [ ] Reload the page (state resets).
- [ ] Send: **"Research what causes the northern lights."**
- [ ] At least 1 `Research` delegation appears with a bulleted list of
facts in the result.
- [ ] Send: **"Now write a paragraph aimed at a 10-year-old, using those
facts."**
- [ ] A `Writing` delegation appears with a polished paragraph in the
result.
- [ ] Send: **"Critique that paragraph."**
- [ ] A `Critique` delegation appears with 2-3 actionable critiques.
### 4. Supervisor reply hygiene
- [ ] After each chain, the supervisor's chat reply is short — it
summarizes rather than re-pasting the full sub-agent output (which
already lives in the delegation log).
- [ ] The "Supervisor running" badge disappears once the run is complete.
### 5. Error handling
- [ ] Send a very short message (e.g. "Hi"). The supervisor responds
gracefully (it may not delegate for a trivial greeting).
- [ ] No console errors during normal usage.
## Expected Results
- Page loads in < 3 seconds.
- Each user request that's non-trivial produces at least one delegation
entry.
- The delegation log grows live during the run, not just at the end.
- Sub-agent results are real LLM outputs (not stubbed strings).