First flag.

Every challenge on stackd ends the same way: you find a flag and submit it here. Flags always look like this:

stackd{some_text_here}

This tutorial walks you through one complete loop.

1. Read the brief. You're doing it. Briefs tell you what you're given and what to look for.
2. Download the file. Grab briefing.txt from the files section below.
3. Analyse it. The objective in the file is encoded. The alphabet and the trailing = are a strong clue about which encoding.
4. Submit the flag. Paste the full flag, including stackd{ and }, in the submission box.

Once you capture it, you earn points, climb from Recruit, and the writeup unlocks. Hints are available below if you get stuck.