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Add Google Gemini CLI and Antigravity OAuth providers

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- Add google-gemini-cli provider: free Gemini 2.0/2.5 via Cloud Code Assist
- Add google-antigravity provider: free Gemini 3, Claude, GPT-OSS via sandbox
- Move OAuth infrastructure from coding-agent to ai package
- Fix thinking signature handling for cross-model handoff
- Fix OpenAI message ID length limit (max 64 chars)
- Add GitHub Copilot overflow pattern detection
- Add OAuth provider tests for context overflow and streaming
This commit is contained in:
Mario Zechner 2025-12-20 18:21:32 +01:00
parent 3266cac0f1
commit c359023c3f
25 changed files with 1392 additions and 413 deletions
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38
packages/ai/src/providers/google-shared.ts
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@ -7,7 +7,7 @@ import type { Context, ImageContent, Model, StopReason, TextContent, Tool } from
import { sanitizeSurrogates } from "../utils/sanitize-unicode.js";
import { transformMessages } from "./transorm-messages.js";
type GoogleApiType = "google-generative-ai" | "google-cloud-code-assist";
type GoogleApiType = "google-generative-ai" | "google-gemini-cli";
/**
* Convert internal messages to Gemini Content[] format.
@ -48,14 +48,23 @@ export function convertMessages<T extends GoogleApiType>(model: Model<T>, contex
for (const block of msg.content) {
if (block.type === "text") {
// Skip empty text blocks - they can cause issues with some models (e.g. Claude via Antigravity)
if (!block.text || block.text.trim() === "") continue;
parts.push({ text: sanitizeSurrogates(block.text) });
} else if (block.type === "thinking") {
const thinkingPart: Part = {
thought: true,
thoughtSignature: block.thinkingSignature,
text: sanitizeSurrogates(block.thinking),
};
parts.push(thinkingPart);
// Thinking blocks require signatures for Claude via Antigravity.
// If signature is missing (e.g. from GPT-OSS), convert to regular text with delimiters.
if (block.thinkingSignature) {
parts.push({
thought: true,
text: sanitizeSurrogates(block.thinking),
thoughtSignature: block.thinkingSignature,
});
} else {
parts.push({
text: `<thinking>\n${sanitizeSurrogates(block.thinking)}\n</thinking>`,
});
}
} else if (block.type === "toolCall") {
const part: Part = {
functionCall: {
@ -112,10 +121,17 @@ export function convertMessages<T extends GoogleApiType>(model: Model<T>, contex
});
}
contents.push({
role: "user",
parts,
});
// Cloud Code Assist API requires all function responses to be in a single user turn.
// Check if the last content is already a user turn with function responses and merge.
const lastContent = contents[contents.length - 1];
if (lastContent?.role === "user" && lastContent.parts?.some((p) => p.functionResponse)) {
lastContent.parts.push(...parts);
} else {
contents.push({
role: "user",
parts,
});
}
}
}