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fix: handle system messages in OpenAI proxy (#1403)

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This commit is contained in:
Halil Ertekin
2026-05-28 22:08:07 -04:00
committed by GitHub
parent e22424097e
commit f42aee9a20
4 changed files with 213 additions and 6 deletions
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src/proxy/transformers/request-transformer.ts
+11 -3
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@@ -40,7 +40,7 @@ type AnthropicContentBlock =
| { type: string; [key: string]: unknown };
interface AnthropicMessage {
role?: 'user' | 'assistant' | string;
role?: 'system' | 'user' | 'assistant' | string;
content?: string | AnthropicContentBlock[];
}
@@ -435,8 +435,8 @@ function transformMessages(messagesValue: unknown): OpenAIMessage[] {
messagesValue.forEach((message, messageIndex) => {
const parsedMessage = assertObject(message, `messages[${messageIndex}]`) as AnthropicMessage;
const role = parsedMessage.role;
if (role !== 'user' && role !== 'assistant') {
throw new Error(`messages[${messageIndex}].role must be "user" or "assistant"`);
if (role !== 'system' && role !== 'user' && role !== 'assistant') {
throw new Error(`messages[${messageIndex}].role must be "system", "user", or "assistant"`);
}
if (pendingToolUseIds && pendingToolUseIds.size > 0 && role !== 'user') {
@@ -446,6 +446,14 @@ function transformMessages(messagesValue: unknown): OpenAIMessage[] {
}
const content = parsedMessage.content;
if (role === 'system') {
translatedMessages.push({
role: 'system',
content: flattenTextContent(content, `messages[${messageIndex}].content`),
});
return;
}
if (typeof content === 'string') {
if (pendingToolUseIds && pendingToolUseIds.size > 0) {
throw new Error(