feat(ag-ui): customEvents signal for live a2ui streaming parity#606
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Peer to examples/chat over the AG-UI transport. Three sequenced parts: (1) add customEvents signal to @threadplane/ag-ui (closes the one live- a2ui-streaming gap; valuable beyond the example) + docs; (2) the examples/ag-ui app/python/smoke with full feature parity; (3) deploy via a dedicated Railway service + ag-ui-demo.threadplane.ai. Feasibility resolved by static spike: everything above the neutral Agent contract is transport-agnostic; only the customEvents signal is missing. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…ts store signal Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…ve a2ui streaming Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…n API reference Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Summary
Adds a
customEventssignal to the@threadplane/ag-uiadapter, closing the one gap that prevented live/progressive a2ui streaming over AG-UI (found via the examples/ag-ui spike).on_interruptCUSTOMevent as{name, data}into a new store signal; resets onRUN_STARTED.toAgentexposes it (return type widened toAgUiAgent, mirroring langgraph'sLangGraphAgent).chat.component.tsalready feature-detectsagent.customEvents()— no chat changes.AgUiAgent,CustomStreamEvent.Without this, a2ui renders from the final tool-call surface (fallback); with it, surfaces build up token-by-token. Part 1 of the
examples/ag-uidesign (docs/superpowers/specs/2026-06-06-examples-ag-ui-standalone-design.md); also includes the spec + plan docs.Test plan
toAgentexposure.nx test ag-ui+nx build ag-uigreen.🤖 Generated with Claude Code