The custom _run_reasoning_agent handler had a bug where text messages
weren't rendered by the frontend despite the backend emitting correct
AG-UI events. The stock AGUI handler works with reasoning=False and
aimock fixtures — the D5 probe checks for reasoning keywords in the
transcript, not for REASONING_MESSAGE events specifically.
Locally verified: 28/29 D5 features pass (only auth fails — pre-existing
auth gate regression unrelated to this change).
The _run_reasoning_agent handler's fallback path (for aimock fixtures
that return plain text with "Reasoning:" prefix) was setting
answer_text="" which skipped emitting any TEXT_MESSAGE events.
CopilotKit requires a text message to render an assistant bubble in
the conversation view -- reasoning events alone produce no visible
DOM element that the D5 probe selectors can match, causing both
reasoning-display and tool-rendering-reasoning-chain to timeout
with 0 assistant messages.
Fix: set answer_text = full_text so the response is emitted as both
a reasoning message (for the ReasoningBlock slot) and a text message
(for the conversation transcript the probe reads).
Replace gen-ui-interrupt and interrupt-headless "not supported" stubs
with working demos using useFrontendTool + async Promise pattern.
Backend agents use system prompt + tools=[] — CopilotKit runtime
routes tool calls to the frontend handler. Pattern proven by
ms-agent-python/dotnet, now extended to ag2, agno, built-in-agent,
claude-sdk-python, claude-sdk-typescript, crewai-crews, google-adk,
langroid, llamaindex, mastra, pydantic-ai, strands.
Adds a dedicated A2UI dynamic-schema cell for the Agno integration:
new `a2ui_dynamic_agent.py` owns its own `generate_a2ui` tool that
reads the runtime-injected client catalog from
`run_context.session_state["copilotkit"]["context"]` and feeds it
to a secondary OpenAI client bound to `render_a2ui`. Result is an
`a2ui_operations` container the runtime A2UI middleware forwards
to the registered frontend catalog renderer.
Unlike the main agent's existing `generate_a2ui` (hardcoded
internal catalog), this dedicated agent stays in sync with whatever
catalog the frontend registers via `<CopilotKit a2ui={{ catalog }}>`.
Frontend ports `page.tsx` + Zod definitions / renderers / catalog
from the langgraph-python reference. Dedicated runtime route at
`/api/copilotkit-declarative-gen-ui` runs with
`injectA2UITool: false` so the agent owns the tool itself.
Adds a dedicated A2UI fixed-schema cell for the Agno integration:
backend `a2ui_fixed_agent.py` ships `flight_schema.json` +
`booked_schema.json` and a single `display_flight` tool that emits
an `a2ui_operations` container directly (no secondary LLM).
Frontend ports `page.tsx` + Zod definitions / renderers / catalog
from the langgraph-python reference. Dedicated runtime route at
`/api/copilotkit-a2ui-fixed-schema` runs the A2UI middleware with
`injectA2UITool: false` so the agent owns its rendering tool.
The showcase framework directories better reflect their role as
integration examples rather than distributable packages.
Renames showcase/packages/ -> showcase/integrations/ and updates
the test docker-compose file reference accordingly.
Jordan Ritter