Add docs/multi-agent-sandbox-tools.md covering:
- Configuration examples (personal + restricted, work agents)
- Different sandbox modes per agent
- Tool restriction patterns (read-only, safe execution, communication-only)
- Configuration precedence rules
- Migration guide from single-agent setups
- Troubleshooting tips
Add PR_SUMMARY.md for upstream submission with:
- Feature overview and use cases
- Implementation details (49 LoC across 5 files)
- Test coverage (18 new tests, all existing tests pass)
- Backward compatibility confirmation
- Migration examples
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Kudos to Eula, the beautiful and selfless family owl 🦉
This feature was developed to enable safe, restricted access
for family group chats while maintaining full access for
the personal assistant. Schuhu!
