Document warp-frontend play commands in the quick start

[hujc7]

Description

The Newton warp-environments quick start listed only train commands, so there was no
documented way to run inference on a policy trained with --frontend warp.

Each workflow's train command is now followed by its matching play command inside the
same code block, in both the uv and isaaclab.sh tabs, so the pair is read together.
Adds a note that --video is rejected on the warp path — for train and play alike, since
the guard lives in the shared apply_video_recording.

Uses the canonical --visualizer newton_gl; newton has been a deprecated alias since #6658.

Fixes nvbug 6531264.

Page: https://isaac-sim.github.io/IsaacLab/develop/source/overview/core-concepts/physical-backends/newton/warp-environments.html#quick-start

Type of change

• Documentation update

Release backport

• Backport this pull request to the active release branch after it merges into develop

Validation

Every documented command was run end-to-end on an RTX A6000 against develop, with
--num_envs 32 --max_iterations 5 on the train runs to bound them:

Command	Result
train --task Isaac-Cartpole-Direct --frontend warp presets=newton_mjwarp	Training time: 1.72 seconds
train --task Isaac-Velocity-Flat-AnymalD --frontend warp presets=newton_mjwarp	Training time: 7.96 seconds
play --task Isaac-Cartpole-Direct --frontend warp ... --checkpoint latest --visualizer newton_gl	loaded model_4.pt
play --task Isaac-Velocity-Flat-AnymalD --frontend warp ... --checkpoint latest --visualizer newton_gl	loaded model_4.pt
play ... --frontend warp --video	rejected with ValueError: --video is not supported with --frontend 'warp'
play ... --frontend torch --video (the note's remedy)	wrote videos/play/clip_0000.mp4

uv run --isolated --extra test -- make -C docs current-docs (-W --keep-going) passes with
no warnings, after merging develop.

No changelog fragment: the change touches only docs/.

Checklist

• I have read and understood the contribution guidelines
• I have run the pre-commit checks with ./isaaclab.sh --format
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added my name to the CONTRIBUTORS.md or my name already exists there

[isaaclab-review-bot]

Isaac Lab Review Bot

Reviewed the documentation-only addition of warp-frontend play commands for both direct and manager-based workflows, along with the new video-recording limitation note. The examples consistently pair with the existing training commands in both quick-start tabs.

• Design and architecture: The additions preserve the existing tab-set and code-block organization. The --video limitation is placed alongside the warp quick-start commands where users are most likely to encounter it.
• API: No public API or CLI contract is changed. The documented play path uses the existing warp frontend, Newton preset, latest-checkpoint selector, and canonical newton_gl visualizer spelling. No source package is modified, so the source-package changelog requirement is not triggered.
• Implementation: The RST indentation, shell continuations, and note directive are consistent with the surrounding document. The direct and manager-based play examples mirror their corresponding training configurations, and the note clearly identifies that recording requires replay through the torch frontend.

No blocking issues. No inline issue met the actionable-evidence threshold; the assessment above records the review feedback.

Automated review; human maintainers own approval decisions.

[greptile-apps]

Greptile Summary

Adds matching inference commands to the Newton warp-environments quick start and clarifies that video recording requires replay through the torch frontend.

• Documents play commands for direct and manager-based RSL-RL workflows in both launcher tabs.
• Uses the canonical newton_gl visualizer and latest checkpoint selector.
• Adds guidance for recording rollouts from warp-trained checkpoints.

Confidence Score: 5/5

The documentation-only change appears safe to merge.

The new commands use supported frontend, preset, checkpoint, and visualizer arguments, and no concrete failure remains in the playback or video guidance.

Important Files Changed

Filename	Overview
docs/source/overview/core-concepts/physical-backends/newton/warp-environments.rst	The added play commands and video guidance align with the CLI contracts and documented validation; no actionable issue was identified.

_{Reviews (1): Last reviewed commit: "Drop the quick-start prose intro" | Re-trigger Greptile}

[hujc7]

@StafaH for review

[isaaclab-bot]

Backported to release/3.0.0 as 0a746c4.