Function concatFilesBestEffort

src/node/services/workspaceService.ts:976–1012

* Concatenate source files (skipping missing ones) into destPath. * Returns false when no source exists or on write failure.

(params: {
  srcPaths: string[];
  destPath: string;
  logContext: Record<string, unknown>;
})

 * Returns false when no source exists or on write failure.
 */
async function concatFilesBestEffort(params: {
  srcPaths: string[];
  destPath: string;
  logContext: Record<string, unknown>;
}): Promise<boolean> {
  const chunks: Buffer[] = [];
  for (const srcPath of params.srcPaths) {
    try {
      chunks.push(await fsPromises.readFile(srcPath));
    } catch (error: unknown) {
      if (!isErrnoWithCode(error, "ENOENT")) {
        log.error("Failed to read session artifact file for concatenation", {
          ...params.logContext,
          srcPath,
          error: getErrorMessage(error),
        });
      }
    }
  }

  if (chunks.length === 0) {
    return false;
  }

  try {
    await fsPromises.mkdir(path.dirname(params.destPath), { recursive: true });
    await fsPromises.writeFile(params.destPath, Buffer.concat(chunks));
    return true;
  } catch (error: unknown) {
    log.error("Failed to write concatenated session artifact file", {
      ...params.logContext,
      destPath: params.destPath,
      error: getErrorMessage(error),
    });
    return false;
  }
}

async function copyDirIfMissingBestEffort(params: {
  srcDir: string;