commands.run runs a shell command (/bin/bash -l -c) in the sandbox and waits for it. It returns stdout, stderr and the exit code; a non-zero exit raises an exception you can catch.
Sandbox-wide environment variables go on create:
Sandbox.create("base", envs={"API_TOKEN": "…"}) or anona-compute create -e API_TOKEN=….
Install packages
Every template hassudo for user. Install what you need at runtime:
install.py
python or node template so the toolchain is already there. Pause the sandbox between runs to keep what you installed.
JSON output from the CLI
--json prints one JSON object per line, which suits scripts:
exec_json.sh