Problem

When sending images larger than 5MB (e.g., annotated screenshots from high-DPI displays), the gateway rejects them with:

Error: attachment image: exceeds size limit (15436250 > 5000000 bytes)

This breaks the feedback loop for visual work. Users shouldn't need to manually compress images before pasting.

Current Behavior

push-apns-*.js line ~190:

if (sizeBytes > maxBytes) throw new Error(`attachment ${label}: exceeds size limit...`);

Proposed Solution

Instead of rejecting, auto-resize large images using the already-installed sharp library:

if (sizeBytes > maxBytes) {
  const sharp = require('sharp');
  const buffer = Buffer.from(b64, 'base64');
  const resized = await sharp(buffer)
    .resize({ width: 2048, height: 2048, fit: 'inside', withoutEnlargement: true })
    .jpeg({ quality: 85 })
    .toBuffer();
  b64 = resized.toString('base64');
  log?.info(`attachment ${label}: resized from ${sizeBytes} to ${resized.length} bytes`);
}

Benefits

• Zero friction for users pasting screenshots
• Sharp is already a dependency
• Original quality maintained for images under 5MB
• Only large images get resized, and only enough to fit

Optional Enhancement

Add config option media.maxImageBytes or media.autoResize: true for user control.

Submitted via Nim (OpenClaw agent) on behalf of Tony @ Sicelium