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copilotkit__copilotkit/showcase/integrations/agno/qa/subagents.md
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Alem Tuzlak 23a3b24a01 feat(showcase/integrations): shared-state-read-write + subagents demos across 15 packages 
Adds real working Shared State (Read+Write) and Sub-Agents demos to 15
showcase integrations, mirroring the canonical langgraph-python and
google-adk reference implementations. Fills rows previously empty on
the showcase coverage dashboard.

Packages: ag2, agno, claude-sdk-python, claude-sdk-typescript,
crewai-crews, langgraph-fastapi, langgraph-typescript, langroid,
llamaindex, mastra, ms-agent-dotnet, ms-agent-python, pydantic-ai,
spring-ai, strands. (built-in-agent landed independently on main as
PR #4321 — its variant is canonical; this PR no longer touches it.)

Per-package deliverables: framework-native backend agents
(preferences-injection middleware/callback + set_notes tool;
supervisor + 3 sub-agents wired as tools with running -> completed
/failed delegation log); frontend page.tsx + preferences-card.tsx /
notes-card.tsx for SSRW and delegation-log.tsx for subagents — wired
to useAgent({ updates: [OnStateChanged] }); manifest entries; runtime
route registration + per-package agent server config; real QA
scripts.

Includes targeted hardening fixes from a 7-agent code-review loop:

- Sub-agent failure paths now correctly emit status: "failed"
  (previously hardcoded "completed" or unreachable in
  mastra/strands/langgraph-fastapi/langgraph-typescript/ag2)
- Parallel-tool-call delegation race fixed in langgraph-fastapi
  (Annotated[list, add]) and langgraph-typescript (concat reducer)
- Silent data loss eliminated in
  claude-sdk-python/claude-sdk-typescript/crewai-crews — empty
  JSON.parse catches now log + emit error events
- ms-agent-dotnet set_notes writes to per-thread slot via AsyncLocal
- mastra working-memory writes are deterministic via
  src/mastra/tools/working-memory.ts helper
- spring-ai tool-call envelope ids match supervisor's tc.id() and
  AG-UI event ordering reordered; CopyOnWriteArrayList for
  parallel-call safety
- Stack trace + raw error message leaks scrubbed across 8+ Next.js
  routes — log server-side with errorId + return generic envelope
- Sub-agent calls no longer block event loops in ag2
  (asyncio.to_thread), langroid (llm_response_async), pydantic-ai
  (async run + async tools)
- langroid lru_cache cross-request contamination dropped
- Numerous smaller items: claude-sdk-python invalid model id, Callable
  annotation, /health endpoint exposed; crewai-crews supervisor
  no longer resets delegations every turn; pydantic-ai snapshot uses
  model_dump()

CI fixes folded in:
- crewai-crews test_forwarded_props: extend the stubbed
  ag_ui_crewai.endpoint module to expose
  add_crewai_flow_fastapi_endpoint and add stub
  agents.shared_state_read_write / agents.subagents modules
- generate-catalog test: bump crewai-crews wired-cell expectation
  28 -> 30; replace hardcoded total-wired count with an invariant
  (wired + stub + unshipped = 737) plus a lower-bound floor
- oxfmt run on the qa/shared-state-read-write.md files in mastra +
  spring-ai

Rebased onto latest main (post showcase/packages -> showcase/integrations
rename + post built-in-agent landing). Original blitz history
preserved at the blitz-pre-rebase-snapshot tag.

Known follow-ups (deferred to follow-up PR):
- agno sync sub_agent.run() blocks event loop (perf only)
- ms-agent-python asyncio thread-fallback fragility
- llamaindex initial-state coercion when UI clears state
- Manifest highlight audit (langgraph-typescript headless-complete,
  langgraph-fastapi byoc-* missing route.ts highlights)
- agno hitl-in-chat declared in demos but not features; duplicate
  /demos/hitl-in-chat route
- langgraph-typescript server.mjs graphSpec only registers 3 graphs
  vs 23 in langgraph.json (pre-existing)
- mastra hitl legacy demo missing from features list
- claude-sdk-python agents/agent.py line 474 also has the legacy
  claude-opus-4-5 default
- PARITY_NOTES vs manifest mismatches for hitl-in-app across
  spring-ai/agno/ag2 (pre-existing)
- spring-ai a2ui-fixed-schema missing from generative_ui list
2026-04-28 18:36:13 +02:00

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QA: Sub-Agents — Agno

Prerequisites

  • Demo is deployed and accessible at /demos/subagents on the dashboard host
  • Agent backend is healthy (/api/health); OPENAI_API_KEY is set; the Agno agent server exposes the /subagents/agui endpoint

Test Steps

1. Basic Functionality

  • Navigate to /demos/subagents; verify the page renders within 3s with a left-side delegation log panel and a right-side CopilotChat pane
  • Verify data-testid="delegation-log" is visible with heading "Sub-agent delegations"
  • Verify the empty-state data-testid="delegation-empty" reads "No delegations yet. Ask the supervisor to plan a deliverable."
  • Verify data-testid="delegation-count" reads "0 calls"
  • Verify the chat input placeholder is "Give the supervisor a task..."
  • Verify all 3 suggestion pills are visible with verbatim titles: "Write a blog post", "Explain a topic", "Summarize a topic"

2. Feature-Specific Checks

Live delegation log (research → write → critique)

  • Click the "Write a blog post" suggestion (sends a request that asks for research → writing → critique on cold exposure training)
  • Within 5s verify data-testid="supervisor-running" appears next to the heading (the supervisor's agent.isRunning is true)
  • Within 30s verify at least 3 data-testid="delegation-entry" cards have appeared, in order: Research → Writing → Critique (matching the supervisor's instructed sequence)
  • Verify each card shows a sub-agent badge (Research blue, Writing emerald, Critique purple) and a status badge that ends in completed (emerald) once the sub-agent returns
  • During delegation, verify in-flight cards show data-status="running" with an amber border, an animated spinner, and the text "Sub-agent is working…"
  • After the run finishes, verify each completed card shows a non-empty result body (research bullets, draft paragraph, critique bullets) — the agno custom AGUI router emits a StateSnapshotEvent carrying delegations after each run, so the UI re-renders the final state
  • Verify data-testid="delegation-count" updates to reflect the total number of delegations made
  • Verify the supervisor's final chat message returns a concise summary referencing the work done

Sub-agent variety

  • Click "Explain a topic"; verify a fresh Research → Writing → Critique sequence appears (delegations from the prior run remain in the log; the supervisor instructs set_notes-style replacement only on the supervisor agent — sub-agent log is append-only)
  • Click "Summarize a topic"; verify another sequence appears, growing the log

Failure handling

  • (Best-effort, hard to provoke) If a sub-agent ever fails (network blip, provider error), verify the corresponding entry transitions to data-status="failed" with a red border and the body text reads sub-agent call failed: <ExceptionClassName> (see server logs for details) — no provider URLs / request IDs leaked to the UI

3. Error Handling

  • Send an empty message; verify it is a no-op
  • Reload the page; verify the delegation log resets to its empty state
  • Verify DevTools -> Console shows no uncaught errors during any flow above

Expected Results

  • Page loads within 3 seconds
  • First delegation entry appears within 10 seconds of a non-trivial task being submitted
  • Full research → write → critique chain completes within 60 seconds for typical prompts
  • Delegations list grows in real time, with running status visible while a sub-agent is working and completed/failed once it returns
  • No UI layout breaks, no uncaught console errors
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