# Xinghan Product Notes

Xinghan is a Cosmic-family product. Load Cosmic platform knowledge first, then apply Xinghan-specific product or version rules.

## Default Stack

- Platform: Cosmic.
- Language: Java.
- Main concerns: plugin lifecycle, metadata verification, SDK signature verification, transaction boundaries, performance review.

## Harness Rules

- Do not use enterprise C# namespaces or lifecycle assumptions.
- Do not treat Xinghan as the old enterprise C# product line.
- Use Cosmic review and unit-test rules unless a Xinghan-specific standard overrides them.