refactor-dedupe-and-cleanup

[Code Quality] Removes code duplication and cleans up dead code. Use to eliminate copy-paste code, consolidate similar logic, and remove unused code paths.

$ 安裝

git clone https://github.com/CANTAGESTUDIO/CosmicAtlasPacker /tmp/CosmicAtlasPacker && cp -r /tmp/CosmicAtlasPacker/.claude/skills/refactor-dedupe-and-cleanup ~/.claude/skills/CosmicAtlasPacker

// tip: Run this command in your terminal to install the skill