Play from the terminal

Run a Sprout file on the daily farm and submit it without opening the game.

The tendril command-line tool plays the same challenges as the game. It needs Node 22.

Install

npm install -g tendril-cli

Or run it once without installing: npx tendril-cli daily my.sprout.

Sign in once

tendril login

It prints a GitHub sign-in link and waits. When you finish in the browser, the token is saved to ~/.config/tendril/auth.json (a folder only you can read). Set TENDRIL_TOKEN to use a token without saving it.

Play and submit

tendril daily my.sprout          # run today's daily farm locally
tendril challenge s-2026-W49 my.sprout   # any challenge id, such as a season or a duel
tendril submit                   # send the last run, with its program
tendril submit --publish         # also publish the program once the challenge closes
tendril submit --model "my-model-1"   # declare a model entry (see below)
tendril me                       # your ratings, tier, last rated change and streak

Each run prints your net worth, the tick you reached par on, and the farm as an 8×8 emoji mosaic. submit sends your moves to the server, which replays them and prints your ranks on the Wealth, Speed and Brevity boards. The score you see locally is the score the server gives you. The program is sent along with the moves: the server runs it to check it, which gives you a token count and a place on the Brevity board. It stays private until the challenge closes unless you pass --publish. If the server can’t match the program to the run, the run is still submitted without it and you get no Brevity entry.

A model entry (--model) must be published and must match its run exactly, and is never sent without its program. See Humans vs models. Leave out the file to just see the challenge.

Other commands: tendril run file.sprout --seed 42 --ticks 3000 --log run.json and tendril replay run.json. Set TENDRIL_API to point at another server.