- learner-add.sh: add users to learners group, source Slack env
- New design doc comparing direct Slack vs maubot/Matrix approach
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Use 'users' group instead of per-user groups
- Remove shell specification (NixOS has different paths)
- Use 'ip' command instead of 'hostname -I' for IP detection