TypeScript SDK mostly working

Ok so this is still pretty rough, and notably there's no reporting for streaming. But for non-streaming requests I've verified that this does in fact report requests locally.

app/src/modelProviders/openai-ChatCompletion/getCompletion.ts

@@ -1,54 +1,10 @@
 /* eslint-disable @typescript-eslint/no-unsafe-call */
-import {
-  type ChatCompletionChunk,
-  type ChatCompletion,
-  type CompletionCreateParams,
-} from "openai/resources/chat";
-import { type CompletionResponse } from "../types";
-import { isArray, isString, omit } from "lodash-es";
-import { openai } from "~/server/utils/openai";
+import { isArray, isString } from "lodash-es";
 import { APIError } from "openai";
-
-const mergeStreamedChunks = (
-  base: ChatCompletion | null,
-  chunk: ChatCompletionChunk,
-): ChatCompletion => {
-  if (base === null) {
-    return mergeStreamedChunks({ ...chunk, choices: [] }, chunk);
-  }
-
-  const choices = [...base.choices];
-  for (const choice of chunk.choices) {
-    const baseChoice = choices.find((c) => c.index === choice.index);
-    if (baseChoice) {
-      baseChoice.finish_reason = choice.finish_reason ?? baseChoice.finish_reason;
-      baseChoice.message = baseChoice.message ?? { role: "assistant" };
-
-      if (choice.delta?.content)
-        baseChoice.message.content =
-          ((baseChoice.message.content as string) ?? "") + (choice.delta.content ?? "");
-      if (choice.delta?.function_call) {
-        const fnCall = baseChoice.message.function_call ?? {};
-        fnCall.name =
-          ((fnCall.name as string) ?? "") + ((choice.delta.function_call.name as string) ?? "");
-        fnCall.arguments =
-          ((fnCall.arguments as string) ?? "") +
-          ((choice.delta.function_call.arguments as string) ?? "");
-      }
-    } else {
-      // @ts-expect-error the types are correctly telling us that finish_reason
-      // could be null, but don't want to fix it right now.
-      choices.push({ ...omit(choice, "delta"), message: { role: "assistant", ...choice.delta } });
-    }
-  }
-
-  const merged: ChatCompletion = {
-    ...base,
-    choices,
-  };
-
-  return merged;
-};
+import { type ChatCompletion, type CompletionCreateParams } from "openai/resources/chat";
+import mergeChunks from "openpipe/src/openai/mergeChunks";
+import { openai } from "~/server/utils/openai";
+import { type CompletionResponse } from "../types";
 
 export async function getCompletion(
   input: CompletionCreateParams,
@@ -59,7 +15,6 @@ export async function getCompletion(
 
   try {
     if (onStream) {
-      console.log("got started");
       const resp = await openai.chat.completions.create(
         { ...input, stream: true },
         {
@@ -67,11 +22,9 @@ export async function getCompletion(
         },
       );
       for await (const part of resp) {
-        console.log("got part", part);
-        finalCompletion = mergeStreamedChunks(finalCompletion, part);
+        finalCompletion = mergeChunks(finalCompletion, part);
         onStream(finalCompletion);
       }
-      console.log("got final", finalCompletion);
       if (!finalCompletion) {
         return {
           type: "error",