feat(sdk): auto-inject A2UI tool in CopilotKitMiddleware#5161
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ranst91
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Production Digest-Pinning AuditAll 27 services digest-pinned. Run 2026-06-04 10:17:14 PDT — 0 finding(s). |
Prebuilt agents get dynamic A2UI with no extra wiring — adding the middleware is enough. When the frontend registers an A2UI catalog (surfaced by the runtime into state["ag-ui"].a2ui_schema), the middleware infers the agent's own model, advertises the generate_a2ui tool in the model-call hook, and executes it in the tool-call hook. No catalog → the tool is never advertised. Covers both @copilotkit/sdk-js and the copilotkit Python SDK. Bumps the A2UI tool-factory dependency to where get_a2ui_tools ships (@ag-ui/langgraph 0.0.35, ag-ui-langgraph >=0.0.37).
The auto-injected generate_a2ui tool now resolves the A2UI catalog from both delivery paths: the CopilotKit runtime proxy (a copilotkit.context entry) and the AG-UI native endpoint (state["ag-ui"].a2ui_schema). The registered catalog id is extracted and bound to generated surfaces so BYOC custom catalogs render their own components instead of the basic catalog. Covers @copilotkit/sdk-js and the copilotkit Python SDK.
The declarative-gen-ui demo across the three langgraph integrations now relies on the middleware to inject and execute generate_a2ui — the agents collapse to create_agent + CopilotKitMiddleware with no hand-rolled tool. Adds render_a2ui fixtures for the new tool path and pins the integrations to the A2UI alpha SDKs (copilotkit 0.1.94a1, @copilotkit/sdk-js 1.59.3-alpha.1).
…=0.0.37 langgraph-fastapi bumped ag-ui-langgraph[fastapi] 0.0.35->0.0.37 (auto-A2UI needs get_a2ui_tools). Both non-exact, so the FAIL count stays 63 but the FAIL-set hash shifted. Update validatePinsFailHash to the new set.
declarative-gen-ui moved to the CopilotKitMiddleware auto-A2UI path across the 3 langgraph integrations. The middleware's inner forced tool is render_a2ui, so each integration's gen-ui-declarative.json gained 4 render_a2ui fixtures that share match keys with the pre-existing render_a2ui entries in that integration's render-a2ui.json (the a2ui_fixed demo). 4 pills x 3 integrations = 12. Same-context cross-demo overlap, disambiguated at runtime by the probe fixtureFile.
The A2UI middleware (@ag-ui/a2ui-middleware) forwards injectA2UITool on forwardedProps; ag-ui-langgraph surfaces it into agent state at state["ag-ui"]["inject_a2ui_tool"]. The CopilotKit LangGraph middleware (py + js) now reads that flag and only injects generate_a2ui when it is truthy (opt-in), drops the runtime's render_a2ui so the model sees one A2UI tool, and skips if the agent already defines generate_a2ui. The catalog only binds surfaces; it is no longer the gate. Reverts the earlier runtime-forward + context-channel approach. Deps: ag-ui-langgraph>=0.0.38 (py), @ag-ui/langgraph 0.0.37 (sdk-js), @ag-ui/a2ui-middleware 0.0.6 + @ag-ui/langgraph 0.0.37 (runtime); .npmrc min-release-age exclude for @ag-ui/a2ui-middleware. Showcase langgraph pins bumped to copilotkit==0.1.94a3 / sdk-js 1.59.3-alpha.3 / @ag-ui/langgraph 0.0.37.
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tylerslaton
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Jun 4, 2026
…seline pins - Regenerate fastapi/typescript/ts-agent package-lock.json so npm ci matches package.json (@ag-ui/langgraph 0.0.37); fixes build-check. - Bump validate-pins fail-baseline hash for the langgraph-fastapi ag-ui-langgraph >=0.0.38 floor (count unchanged at 63).
tylerslaton
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Jun 4, 2026
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Prebuilt agents get dynamic A2UI with no extra wiring — adding the middleware is enough. When the frontend registers an A2UI catalog (surfaced by the runtime into state["ag-ui"].a2ui_schema), the middleware infers the agent's own model, advertises the generate_a2ui tool in the model-call hook, and executes it in the tool-call hook. No catalog → the tool is never advertised.
Covers both @copilotkit/sdk-js and the copilotkit Python SDK. Bumps the A2UI tool-factory dependency to where get_a2ui_tools ships (@ag-ui/langgraph 0.0.35, ag-ui-langgraph >=0.0.37).