Implements ZMQ command protocol for dashboard-to-agent communication:
- Agents listen on port 6131 for REQ/REP commands
- Dashboard sends "refresh" command when 'r' key is pressed
- Agents force immediate collection of all metrics via force_refresh_all()
- Fresh data is broadcast immediately to dashboard
- Updated help text to show "r: Refresh all metrics"
Also includes metric-level caching architecture foundation for future
granular control over individual metric update frequencies.
Replace traditional 5-second polling with tiered collection strategy:
- RealTime (5s): CPU load, memory usage
- Medium (5min): Service status, disk usage
- Slow (15min): SMART data, backup status
Key improvements:
- Reduce CPU usage from 9.5% to <2%
- Cache warming for instant dashboard responsiveness
- Background refresh at 80% of tier intervals
- Thread-safe cache with automatic cleanup
Remove legacy polling code - smart caching is now the default and only mode.
Agent startup enhanced with parallel cache population for immediate data availability.
Architecture: SmartCache + CachedCollector + tiered CollectionScheduler
- Remove unreachable descriptions from failed nginx sites
- Show complete site URLs instead of truncating at first dot
- Implement service-specific disk quotas (docker: 4GB, immich: 4GB, others: 1-2GB)
- Truncate process names to show only executable name without full path
- Display only highest C-state instead of all C-states for cleaner output
- Format system RAM as xxxMB/GB (totalGB) to match services format
Services widget:
- Fix disk quota formatting with proper rounding instead of truncation
- Remove decimals from RAM quotas and use GB instead of G
- Change quota display to use GB consistently
Backups widget:
- Change GiB to GB for consistency
- Remove spaces between numbers and units
- Update disk usage format to match other widgets: used (totalGB)
- Remove percentage display for cleaner format
System widget:
- Add support for logged-in users in description lines
- Format C-states with "C-State:" prefix on first line, indent subsequent lines
- Add logged_in_users field to SystemSummary data structure
Documentation:
- Add example hash error output to NixOS update instructions
Services widget:
- Remove SB (sandbox) column and related formatting function
- Fix quota formatting to show decimals when needed (1.5G not 1G)
- Remove spaces in unit display (128MB not 128 MB)
Storage widget:
- Change usage format to 23GB (932GB) for better readability
Documentation:
- Add NixOS configuration update process to CLAUDE.md
Replaced system-wide disk usage with accurate per-service tracking by scanning
service-specific directories. Services like sshd now correctly show minimal
disk usage instead of misleading system totals.
- Rename storage widget and add drive capacity/usage columns
- Move host display to main dashboard title for cleaner layout
- Replace separate alert displays with color-coded row highlighting
- Add per-service disk usage collection using du command
- Update services widget formatting to handle small disk values
- Restructure into workspace with dedicated agent and dashboard packages
