add A2A transport to agent-core - #31
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Implements `createA2ATransport` — an `AgentTransport` that routes the GenOffice AI panel to any A2A-protocol-compatible agent over HTTP SSE (https://github.com/a2aproject/A2A). The full conversation context (system prompt + message history) is encoded into a single A2A user message on each `tasks/sendSubscribe` call; streamed artifact text parts are forwarded as `onDelta` events. Error paths — HTTP errors, JSON-RPC error objects, task failed/canceled status, and network failures — all surface via `onError`. Cancellation aborts the in-flight fetch via `AbortController`. Exports `createA2ATransport` and `A2ATransportOptions` from the package root alongside the existing `createIpcTransport`. 11 unit tests cover: correct JSON-RPC wire format, auth/session headers, SSE streaming deltas, status-completion, error paths, abort, multi-turn history encoding, and URL normalisation. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Summary
createA2ATransport— anAgentTransportimplementation that routes the GenOffice AI panel to any A2A-protocol-compatible remote agent over HTTP SSE (tasks/sendSubscribe)onDeltaevents; cancellation usesAbortControllercreateA2ATransportandA2ATransportOptionsfrom@genoffice/agent-corealongside the existingcreateIpcTransportTest plan
npm run test -w @genoffice/agent-core— 11 new unit tests (57 total, all pass); covers JSON-RPC wire format, auth/session headers, SSE streaming deltas, status-completion, error paths (HTTP, JSON-RPC, task failed/canceled, network), abort, multi-turn history encoding, and URL normalisationnpm run typecheck -w @genoffice/agent-core— cleannpm run format:check— clean (Prettier)npm run lint— 0 errors (pre-existing warnings only, none in new files)