providerError (providers/http-shared.mjs)

Helper functions for handling provider responses and errors in HTTP requests.

// Source: https://github.com/Firstp1ck/pi-coding-agent-forge | License: MIT | Copyright 2026 Firstpick
// Provided via justclaw.it.com; keep this notice with the code.
import { combinedSignal } from "@firstpick/pi-utils/http";

export function providerError(code, message) {
  const error = new Error(message);
  error.code = code;
  return error;
}

/** Tolerant transcript extraction, byte-compatible with the Phase-4 WebUI contract. */
export function transcriptTextFromProviderJson(json) {
  return String(json?.text || json?.transcript || json?.data?.text || json?.result?.text || "").trim();
}

export async function parseTranscriptResponse(provider, response) {
  const contentType = String(response.headers.get("content-type") || "").toLowerCase();
  if (contentType.includes("application/js

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