Environments

The catalog Environments in project nodus; reference one as spec.environment.name: nodus/<name>@<version> on a TrainingJob or an agent eval.

Environment	Category	Reward	Readiness	Summary
arithmetic-v2	Math	Binary	Stable	Evaluate short integer expressions with standard precedence and give the exact result.
graph-coloring	Reasoning	Binary	Stable	Color a small graph with three colors so that no edge joins two nodes of the same color.
gsm8k	Math	Binary	Research	Eight thousand grade-school maths word problems, each with a worked solution and a single numeric answer.
letter-counting-legacy-eval	Reasoning	Scalar	Research	Legacy letter-counting evaluation protocol: first 64 generated tasks, raw completion scoring.
letter-counting-legacy-rl	Reasoning	Scalar	Research	Legacy letter-counting RL protocol: first 64 generated tasks train, next 64 held out.
python-functions	Code	Binary	Stable	Write solve(values: list[int]) -> int from a one-line specification; private cases decide the verdict.
reasoning-gym	Reasoning	Scalar	Research	Procedural reasoning generators with deterministic algorithmic scorers; only reviewed families are served.