Support for automatically reloading YAML configuration files when they change on disk, without requiring a restart of Cagent.

Implementation:

• Watch agent YAML files for changes using fsnotify
• When a file changes, validate the new configuration
• Apply the changes to running agents without losing state
• Fall back to previous config if validation fails

Why you'd like to see it

Problem: Changing any agent configuration requires a full restart of Cagent, which:

• Loses all agent context and ongoing conversations
• Interrupts service availability
• Makes iterative prompt engineering painful (edit → stop → start → test → repeat)

Solution benefits:

• Instant prompt/instruction updates while testing
• Zero-downtime config updates in production
• Faster development cycle when tuning agents

Workarounds?

Currently using:

• Manual restart after each YAML edit (loses state)
• Running multiple Cagent instances and switching between them (complex)

Neither preserves agent state or provides seamless updates.

Additional context

This is a common pattern in cloud-native tools:

• Kubernetes automatically updates mounted ConfigMaps
• Prometheus reloads config on SIGHUP
• Most modern servers support graceful config reload

Simple MVP scope:

• Only watch files specified at startup
• Only reload agent instructions/prompts (not model changes)
• Log changes for debugging
• Keep it simple - no fancy rollback mechanisms initially

Similar to how Docker Compose watches for file changes in development mode.