- README: replace "Step 2: Add to your repo" vendoring instructions
with team mode (./setup --team + gstack-team-init)
- CLAUDE.md: rename "Vendored symlink awareness" to "Dev symlink
awareness", add deprecation note
- CONTRIBUTING.md: remove vendoring language from prefix section
- bin/gstack-uninstall: clean up SessionStart hook on uninstall
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>