implement verifiers bridge

[ob1-s]

PR Type

• RL Environment PR - Complete Environment Snapshot & Zero-Training sections
• Non-Environment PR - Complete Description, Related Issues & Type of Change sections

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📝 General Information

Description

Adds a new environment that bridges Atropos with the verifiers library, enabling any environment/eval built with verifiers to work with Atropos, including the +100 envs from the Environments Hub

Related Issues

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• Code refactor (no functional changes)
• Build/CI/CD related changes
• Other (please describe):

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🔖 Environment Snapshot

Field	Your Entry
Environment Name	verifiers_server
Short Description	Verifiers environment integration
Category	RLRF, evals
Dataset Needed?	The dataset associated with the chosen verifiers env
External Deps
Environmental Variables
Compute Footprint Estimate

🧪 Zero-Training Test Results

Details

W&B Link: https://wandb.ai/brunocabeludo321/atropos-environments/runs/9q6cjxum

Examples of the Environment scoring a good example and a bad example:

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✅ Developer & Reviewer Checklist

• Code follows project style (black, isort, flake8 pass with pre-commit)
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• New and existing unit tests pass locally with my changes
• Docstrings added for all new public classes / functions
• If .env vars required, did you add it to the .env.example in repo root?

[ob1-s]

The bridge integrates verifiers into atropos by delegating rollout and scoring logic to the native verifiers env. Evaluation is also delegated to the original env's vf.Env.evaluate method, providing out-of-the-box support for any environment built with verifiers.

I successfully validated evaluation, atropos-sft-gen, and GRPO training. However, after a few steps of training, I ran into a numpy version issue.

[ob1-s]

fixed the dependency issue and added documentation.

complete training run

@teknium1 a quick review would be great