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fix(backend): bridge maps real Pi message_update->text_delta for FE streaming

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Live end-to-end against real pi --mode rpc revealed Pi streams assistant text as
top-level message_update events whose nested assistantMessageEvent carries the
incremental delta — not the top-level text_delta the fake-pi-rpc emits. The bridge
now maps message_update(assistantMessageEvent.text_delta).delta -> FE text_delta,
so the chat shows the model's output during a real session.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
marcopan
2026-06-28 15:03:13 +02:00
co-authored by Claude Opus 4.8
parent 1ee692cdb1
commit 091a055bf0
2 changed files with 18 additions and 0 deletions
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backend/src/bridge/session-bridge.ts
+5
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@@ -19,6 +19,11 @@ export class SessionBridge {
this.fan({ type: "ui_request", ui_request: descriptor });
} else if (m.type === "extension_ui_request" && m.method === "notify") {
this.fan({ type: "info", level: m.notifyType ?? "info", text: m.message ?? "" });
} else if (m.type === "message_update" && m.assistantMessageEvent?.type === "text_delta") {
// Real Pi streams assistant text as message_update events whose nested
// assistantMessageEvent carries the incremental `delta`. Map it to the FE's
// text_delta contract. (Top-level text_delta below is what the fake-pi-rpc emits.)
this.fan({ type: "text_delta", text: m.assistantMessageEvent.delta ?? "" });
} else if (m.type === "text_delta") {
this.fan({ type: "text_delta", text: m.text ?? "" });
} else if (m.type === "system_event") {