A solution for ranking your coaster credits that accounts for the implicit bias of trying to have the right opinion.
Derived from this repository and made non-Claude centric, this tool lets you import your coaster list (via .csv, .json, .md, or plaintext) and sequentially rank them 1-on-1 to produce an unbiased ranking. Choose to run through your whole list of credits, your top 50, 25, or 10. It's best to include the park name along with the coaster, especially for ambiguously named rides (e.g., Batman, Goliath).
Live site is here: https://coasters.cmyksoda.cc
Hosting this yourself is dead simple and lives in one docker container. A docker-compose.yml is already provided.
- Clone this repository.
- Run
docker compose up -d - Coaster ranker now lives at http://localhost:8192
Out of the box the server fetches images from RCDB on demand, so the first person to import a list waits a moment per coaster. You can pre-load whole park chains instead:
docker exec -it coaster-ranker python3 /app/warm_cache.py --list
docker exec -it coaster-ranker python3 /app/warm_cache.py --all
--all covers Cedar Fair, Six Flags, SeaWorld/Busch Gardens, Herschend, Hersheypark, Universal, Disney, Merlin, Palace, Parques Reunidos and Compagnie des Alpes, plus a bunch more well-known independents worldwide — 219 parks, around 1,200 coasters and ~210 MB — and takes about 40 minutes. Images land in ./cache, mounted as a volume, so rebuilding the container never re-downloads anything.
Please be kind to RCDB. MIN_INTERVAL (default 0.34) is the minimum gap in seconds between outbound requests, and every visitor's imports share it.
If you're exposing this via a tunnel or reverse proxy, set ALLOWED_ORIGINS in docker-compose.yml to your domain. It defaults to *, which lets any website drive your API from its visitors' browsers.
Each visitor's coaster list and ranking live only in their own browser (localStorage for the list, IndexedDB for images), so there's no database and nothing of theirs on your server. The image cache is server-side and shared, so one download serves everybody.
IMAGE_FORMAT and MAX_WIDTH control how cached images are stored — the default is webp-q85 at 1100px, enough for a 2x display at the widest the card ever renders, averaging ~140 KB an image. Originals are kept alongside in cache/source, so changing either setting only costs CPU:
docker exec -it coaster-ranker python3 /app/warm_cache.py --reencode
Coaster data and photography come from RCDB, with Coasterpedia and Wikipedia as fallbacks.
Color schemes are Catppuccin Latte (Light) and Mocha (Dark).