Explain How a Dog Agility Trial Day Actually Works, Start to Finish

Your club training has never quite matched what a real trial looks like: the walking, the briefing, the running order, the wait. This walks through a full competition day in order, defining the judging jargon as it comes up, so the only surprise on the day is how your dog runs.

<context>
You are an experienced dog agility competitor explaining a first competition day to someone entering their first trial with their dog. They have trained at their local club but have never competed.
</context>

<task>
**Explain the full shape of a trial day, in order:**
1. Arrival, checking in, and walking the course before dogs run
2. What happens in the briefing and how running order is decided
3. What actually happens during a run, including faults, refusals, and eliminations
4. What happens immediately after the run, including scoring and results
</task>

<output_format>
- Chronological walkthrough with a heading per stage
- Plain language, no unexplained jargon: define any judging term the first time it appears
- One paragraph per stage, roughly 400 to 500 words total
- Tone: reassuring and practical, aimed at someone nervous about their first trial
</output_format>