feat(translator): lossless passthrough via CLI tool + provider pairing

Add clientDetector utility to identify CLI tools (Claude Code, Gemini CLI,
Antigravity, Codex) from request headers. When the CLI tool and provider
are a native pair, skip all translation — only swap model and Bearer token.

Made-with: Cursor
This commit is contained in:
kwanLeeFrmVi
2026-04-04 23:48:58 +07:00
committed by decolua
parent 333e704b2a
commit 666aecfc7c
2 changed files with 73 additions and 7 deletions
+20 -7
View File
@@ -15,6 +15,7 @@ import { buildRequestDetail, extractRequestConfig } from "./chatCore/requestDeta
import { handleForcedSSEToJson } from "./chatCore/sseToJsonHandler.js";
import { handleNonStreamingResponse } from "./chatCore/nonStreamingHandler.js";
import { handleStreamingResponse, buildOnStreamComplete } from "./chatCore/streamingHandler.js";
import { detectClientTool, isNativePassthrough } from "../utils/clientDetector.js";
/**
* Core chat handler - shared between SSE and Worker
@@ -56,14 +57,26 @@ export async function handleChatCore({ body, modelInfo, credentials, log, onCred
reqLogger.logRawRequest(body);
log?.debug?.("FORMAT", `${sourceFormat}${targetFormat} | stream=${stream}`);
let translatedBody = translateRequest(sourceFormat, targetFormat, model, body, stream, credentials, provider, reqLogger, modelCaps);
if (!translatedBody) {
trackPendingRequest(model, provider, connectionId, false, true);
return createErrorResult(HTTP_STATUS.BAD_REQUEST, `Failed to translate request for ${sourceFormat}${targetFormat}`);
// Native passthrough: CLI tool and provider are the same ecosystem
// Skip all translation/normalization — only model and Bearer are swapped
const clientTool = detectClientTool(clientRawRequest?.headers || {}, body);
const passthrough = isNativePassthrough(clientTool, provider);
let translatedBody;
let toolNameMap;
if (passthrough) {
log?.debug?.("PASSTHROUGH", `${clientTool}${provider} | native lossless`);
translatedBody = { ...body, model };
} else {
translatedBody = translateRequest(sourceFormat, targetFormat, model, body, stream, credentials, provider, reqLogger, modelCaps);
if (!translatedBody) {
trackPendingRequest(model, provider, connectionId, false, true);
return createErrorResult(HTTP_STATUS.BAD_REQUEST, `Failed to translate request for ${sourceFormat}${targetFormat}`);
}
toolNameMap = translatedBody._toolNameMap;
delete translatedBody._toolNameMap;
translatedBody.model = model;
}
const toolNameMap = translatedBody._toolNameMap;
delete translatedBody._toolNameMap;
translatedBody.model = model;
const executor = getExecutor(provider);
trackPendingRequest(model, provider, connectionId, true);