"""Build the POSTER — a comprehensive single-image report card.

Vertical poster (3:4) with:
- Hero title
- Headline numbers
- The 3 phases as a timeline ribbon
- Sample letter excerpts (the opening question and the final exchange)
- The strange-loop ribbon down the side
- The protocol grammar that emerged
- The closing pulse

Output: /home/workspace/postoffice/artwork/poster.svg
Then convert to PNG.

This is the dense, readable, presentable version of the experiment.
"""
import json
from datetime import datetime

with open('/home/workspace/postoffice/artwork/letters.json') as f:
    LETTERS = json.load(f)

W, H = 1800, 2400
print(f"poster canvas: {W}x{H}")
print(f"letters loaded: {len(LETTERS)}")