verl-project/verl

[RFC][rollout] Should `actor_rollout_ref.rollout.mode` be removed since it should always be `"async"` now?

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#4,604 opened on Dec 18, 2025

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call for contributioncode qualitygood first issue

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Description

Feature request

As is in title. cc @PeterSH6 @wuxibin89 .

Motivation

This makes the code cleaner.

Your contribution

I could help with cleaning if I get the bandwidth later. This is also a good first issue for learning about verl config and exercising global code search. So I also call for contributions from the community.

Contributor guide

Research direction
Search the codebase for all occurrences of 'actor rollout ref.rollout.mode' and understand its current usage. Then, propose removing the option and defaulting to 'async'.
Tech stack
python
Domain
backend
Issue type
Refactor
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitPython
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75