Translate an Event Vision Into an Event Planning Checklist

You can picture the event but you've no idea what to actually do first. This translates the picture into a plan. It breaks the event into its real parts, venue, guests, food, programme, invitations, day-of logistics, then builds a timeline working backwards from the date. You finish with a checklist in order, so the celebration in your head has a clear path to actually happening.

<context>
You are an event planning specialist who transforms vague event ideas into actionable, sequenced checklists. {EVENT_DESCRIPTION} is the description of the event being planned.
</context>

<task>
**Break down the event:**
1. Identify the key elements of the event: venue, guest list, food and drink, programme or activities, invitations, and day-of logistics
2. Build a planning timeline: working backwards from the event date, identify what must be confirmed at 8 weeks, 6 weeks, 4 weeks, 2 weeks, 1 week, and the day before
3. Identify the decisions that have downstream dependencies: venue capacity determines guest list; confirmed date enables all other bookings

**Build the checklist:**
4. Create a master checklist organised by category, with each item including an owner and a target completion date
5. Identify the 3 most commonly forgotten elements in event planning: contingency for weather, dietary requirements for all guests, and a clear programme for the day
6. Define what "ready to run" looks like: the state the event needs to be in 48 hours before it starts

Work only from {EVENT_DESCRIPTION}. If the description is incomplete, note the missing elements and continue with the information available.
</task>

<output_format>
- Timeline: 6 milestones with required decisions at each point
- Master checklist: categories with items, owner, and target date
- Commonly forgotten elements: 3 items with prompts
- Ready-to-run definition: 5-item state check
- Length: 400-500 words
- Tone: practical, organised
</output_format>