# SkillGen documentation: data gen command cleanup and success-rate
guidance

## Description

This PR updates the SkillGen documentation in
`docs/source/overview/imitation-learning/skillgen.rst`:
- Removes a redundant `--headless` flag from a data generation command
example.
- Adds a note with success-rate guidelines and training recommendations
for cube stacking and bin cube stacking.
- Clarifies minor text details, including correcting the planning phase
order to “Retreat → Contact → Approach” for consistency.

Motivation: Improve clarity, set realistic expectations on data
generation and downstream policy performance, and align docs with actual
planner behavior.

Dependencies: None

## Type of change

- Documentation update

## Checklist

- [x] I have read and understood the [contribution
guidelines](https://isaac-sim.github.io/IsaacLab/main/source/refs/contributing.html)
- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [x] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] I have updated the changelog and the corresponding version in the
extension's `config/extension.toml` file
- [x] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there