Hey,

I noticed that when I upload multiple files in a single Slack message, only the first one gets through to the agent. The others are just silently dropped.

What happens:

• Upload 3 PDFs in one message
• Agent only sees the first one
• No error, no warning

Where it comes from:

Looking at dist/slack/monitor/media.js, the resolveSlackMedia() function loops through files[] but returns immediately after the first successful download:

for (const file of files) {
    // ... download logic ...
    return { path, contentType, placeholder };  // exits here
}

So Slack sends all files correctly, OpenClaw receives them, but only processes the first.

Suggested fix:

Return an array instead of a single object, and update the caller in prepare.js to handle multiple attachments.

Happy to help with a PR if this is something you'd want to fix. Let me know!