Function renderToAnsiString

src/utils/staticRender.tsx:74–107

(node: React.ReactNode, columns?: number)

 * Renders a React node to a string with ANSI escape codes (for terminal output).
 */
export function renderToAnsiString(node: React.ReactNode, columns?: number): Promise<string> {
  return new Promise(async resolve => {
    let output = '';

    // Capture all writes. Set .columns so Ink (ink.tsx:~165) picks up a
    // chosen width instead of PassThrough's undefined → 80 fallback —
    // useful for rendering at terminal width for file dumps that should
    // match what the user sees on screen.
    const stream = new PassThrough();
    if (columns !== undefined) {
      ;
      (stream as unknown as {
        columns: number;
      }).columns = columns;
    }
    stream.on('data', chunk => {
      output += chunk.toString();
    });

    // Render the component wrapped in RenderOnceAndExit
    // Non-TTY stdout (PassThrough) gives full-frame output instead of diffs
    const instance = await render(<RenderOnceAndExit>{node}</RenderOnceAndExit>, {
      stdout: stream as unknown as NodeJS.WriteStream,
      patchConsole: false
    });

    // Wait for the component to exit naturally
    await instance.waitUntilExit();

    // Extract only the first frame's content to avoid duplication
    // (Ink outputs multiple frames in non-TTY mode)
    await resolve(extractFirstFrame(output));
  });
}

/**
 * Renders a React node to a plain text string (ANSI codes stripped).