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fix(gemini): backfill thoughtSignature and suppress stream done sentinel

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Backfill DEFAULT_THINKING_AG_SIGNATURE onto functionCall parts missing it
(client history replay) and on Claude tool_use blocks, fixing 400
INVALID_ARGUMENT from Gemini-family APIs. Suppress the OpenAI-style
data: [DONE] sentinel for antigravity/gemini/vertex to avoid parser crashes.

Fixes #2193.

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
WARELIK
2026-06-29 15:28:03 +07:00
committed by decolua
co-authored by Cursor
parent 319caa2d7b
commit 2d94fffe3b
3 changed files with 19 additions and 4 deletions
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open-sse/utils/stream.js
+3 -1
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@@ -350,7 +350,9 @@ export function createSSEStream(options = {}) {
// Some clients (e.g. OpenClaw) expect the OpenAI-style sentinel:
// data: [DONE]\n\n
// Without it they can hang until timeout and trigger failover.
if (!streamDoneSent) {
// Gemini-family clients (Antigravity, Vertex, Gemini) reject this sentinel with 400 syntax errors.
const isGeminiFamily = provider === "antigravity" || provider === "gemini" || provider === "vertex";
if (!streamDoneSent && !isGeminiFamily) {
const doneOutput = "data: [DONE]\n\n";
reqLogger?.appendConvertedChunk?.(doneOutput);
controller.enqueue(sharedEncoder.encode(doneOutput));