Function tryUnwrapTextPayload

src/tools/MCPTool/UI.tsx:327–362

(content: string)

 * pretty-printing keeps \n escaped but we want real line breaks + truncation.
 */
export function tryUnwrapTextPayload(content: string): {
  body: string;
  extras: [string, string][];
} | null {
  const entries = parseJsonEntries(content, {
    maxChars: MAX_JSON_PARSE_CHARS,
    maxKeys: 4
  });
  if (entries === null) return null;
  // Find the one dominant string payload. Trim first: a trailing \n on a
  // short sibling (e.g. pagination hints) shouldn't make it "dominant".
  let body: string | null = null;
  const extras: [string, string][] = [];
  for (const [key, value] of entries) {
    if (typeof value === 'string') {
      const t = value.trimEnd();
      const isDominant = t.length > UNWRAP_MIN_STRING_LEN || t.includes('\n') && t.length > 50;
      if (isDominant) {
        if (body !== null) return null; // two big strings — ambiguous
        body = t;
        continue;
      }
      if (t.length > 150) return null;
      extras.push([key, t.replace(/\s+/g, ' ')]);
    } else if (value === null || typeof value === 'number' || typeof value === 'boolean') {
      extras.push([key, String(value)]);
    } else {
      return null; // nested object/array — use flat or pretty-print path
    }
  }
  if (body === null) return null;
  return {
    body,
    extras
  };
}
const SLACK_ARCHIVES_RE = /^https:\/\/[a-z0-9-]+\.slack\.com\/archives\/([A-Z0-9]+)\/p\d+$/;

/**