Docs: Improve LEAPP clean-clone export guidance

[frlai]

Summary

• Align LEAPP export/deploy docs with the train/play backend-extra pattern (Newton / OV PhysX / Isaac Sim) instead of a standalone uv sync --extra leapp setup.
• Point readers at isaaclab train and --checkpoint pretrained so a clean clone can get from docs to a working export without relying on removed per-backend train.py scripts.

[greptile-apps]

Greptile Summary

The PR updates LEAPP export and deployment guidance to use the current backend-extra and physics-selection model, and adds current training and pretrained-checkpoint references.

• Documents Newton, OV PhysX, and Isaac Sim export/deployment command variants.
• Replaces standalone LEAPP synchronization guidance with per-command uv extras.
• Updates the Direct-workflow tutorial to use the unified training CLI.

Confidence Score: 4/5

The documentation should be corrected before merging because its isaaclab.sh and isaaclab.bat alternatives fail on a clean clone without a separate LEAPP/backend installation step.

The uv examples activate the required extras, but the newly presented wrapper alternatives only execute an existing interpreter and therefore leave required LEAPP and backend packages unavailable.

Files Needing Attention: docs/source/policy_deployment/05_leapp/exporting_policies_with_leapp.rst; docs/source/tutorials/06_exporting/exporting_direct_workflow_policies_with_leapp.rst

Important Files Changed

Filename	Overview
docs/source/policy_deployment/05_leapp/exporting_policies_with_leapp.rst	Adds backend-specific export/deployment guidance, but the wrapper alternatives omit the dependency installation required on a clean clone.
docs/source/tutorials/06_exporting/exporting_direct_workflow_policies_with_leapp.rst	Aligns the Direct-workflow tutorial with unified training and backend selection, while inheriting the wrapper-extra gap in its alternative commands.

_{Reviews (1): Last reviewed commit: "Docs: Point LEAPP export at train and --..." | Re-trigger Greptile}

[greptile-apps]

Wrapper commands omit required extras

When a clean-clone user selects an isaaclab.sh or isaaclab.bat example, the wrapper only invokes the existing Python interpreter and does not install the specialized LEAPP or backend extras, causing export or deployment to fail because the required packages are unavailable.

[isaaclab-review-bot]

Isaac Lab Review Bot

The documentation aligns LEAPP export and deployment with the backend-extra and physics=... selection pattern used by training. However, removing the persistent leapp installation step leaves the retained isaaclab.sh and isaaclab.bat workflows without documented instructions for installing an extra that is explicitly excluded from --extra all.

• Design and architecture: The Newton, OV PhysX, and Isaac Sim PhysX command structure is consistent across export and deployment. The wrapper tabs remain incompatible with the new exclusively per-command extras guidance because those wrappers cannot express uv run --extra.
• API: No code or CLI contract changes are introduced. The documented checkpoint, visualization, export-path, and physics-selection surfaces are presented consistently, but the installation contract is incomplete for wrapper users.
• Implementation: The uv commands supply leapp and the appropriate backend extras directly. In contrast, the isaaclab.sh and isaaclab.bat commands rely on an already-installed environment, while the patch removes the only persistent installation instruction; a wrapper-specific installation step should be retained or added.

Minor fixes needed. Posted 1 actionable finding inline.

Automated review; human maintainers own approval decisions.

[isaaclab-review-bot]

🟡 Warning · Implementation — Wrapper tabs lose LEAPP install instruction

This rewrite removed the only persistent install step (uv sync --inexact --extra leapp) and now explains extras solely as per-command uv run --extra flags. The retained and newly added isaaclab.sh / isaaclab.bat tabs (e.g. lines 114-127, 444-463) execute in the already-installed environment and cannot pass --extra, so readers on that path have no documented way to install leapp, which the same section states is excluded from --extra all. Keep an install step for the wrapper path.