بداية جلسة عمل عميق

I am about to start a {{DURATION}} focused session on: {{TASK}}

Before I begin, help me set it up:
1. State the single artefact that must exist when the session ends. Be concrete: a file, a decision, a draft, a number.
2. Name the first physical action I take in the first two minutes.
3. List what I will be tempted to do instead, and the rule that blocks each one.
4. Give me the checkpoint question I ask myself at the halfway mark.

Answer in four short lines. Do not motivate me.