feat(ag-ui): @cacheplane/ag-ui adapter wrapping @ag-ui/client#139
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New @cacheplane/ag-ui package wraps @ag-ui/client AbstractAgent into
the runtime-neutral Agent contract. Scope B: messages + lifecycle +
tool calls + state. toAgent(source) primitive + provideAgUiAgent({url})
DI convenience. Pure-function reducer; conformance test against shared
suite. Cockpit demo proves end-to-end decoupling.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
6 tasks: scaffold @cacheplane/ag-ui lib, pure-function reducer with table-driven spec, toAgent + conformance test, provideAgUiAgent DI convenience, cockpit streaming demo, final verify + PR. Pinned to @ag-ui/client and fast-json-patch (RFC 6902 for StateDelta). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Mirror libs/langgraph/ structure. Stubbed toAgent and provideAgUiAgent will be implemented in subsequent commits. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Implements reduceEvent(event, store) covering RUN_STARTED/FINISHED/ERROR, TEXT_MESSAGE_START/CONTENT/END, TOOL_CALL_START/ARGS/END/RESULT, STATE_SNAPSHOT/DELTA, MESSAGES_SNAPSHOT, and CUSTOM. Discriminates state_update CustomEvents into AgentStateUpdateEvent. Table-driven tests cover every variant. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Subscribes to source via AgentSubscriber.onEvent and reduces every event into the produced Agent's signals. submit() optimistically appends user message to both our signals and source.addMessage(), then calls source.runAgent(). stop() calls source.abortRun(). Conformance suite validates the AG-UI adapter passes the same contract assertions as the LangGraph adapter. Also fixes reducer.ts type casts (as unknown as) required by @ag-ui/client 0.0.52 which uses Zod-inferred BaseEvent types that do not overlap with narrower cast targets without the intermediate unknown step. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Constructs HttpAgent from config and wires it through toAgent into the AG_UI_AGENT injection token. Convenience entry point for the common case; custom transports go through toAgent(customAgent) directly. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Mirrors cockpit/langgraph/streaming/angular/ structure. Demonstrates the chat-runtime decoupling: same <chat> composition, AG-UI runtime instead of LangGraph. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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Summary
Motivation
Validates the chat-runtime decoupling shipped in #131..#138 by adding a second adapter on a fundamentally different protocol. `@cacheplane/chat` remains independent of both adapters.
Notable adaptations from plan
Test Plan
Design + plan
🤖 Generated with Claude Code