Claude Code 2.1.228: skill-sync hardening and a Write-tool rule change

A large fix-only release covering TUI redraw hangs, Windows git discovery, self-hosted runner sessions, and settings merges. Two changes go beyond fixes: skills synced from claude.ai are now sandboxed so they can't shadow local commands or run `!` commands and `@` file expansions, and the Write tool now lets newer models overwrite a file they haven't read this session.

Tool: claude-code · Version: 2.1.228 · Significance: 2/5 · fix, security, feature