Updated documentation

CLAUDE.md

@@ -6,6 +6,53 @@ A high-performance Rust-based TUI dashboard for monitoring CMTEC infrastructure.
 
 ## Implementation Strategy
 
+### Next Phase: Systemd Collector Optimization (Based on TODO.md)
+
+**Current Status**: Reverted to working baseline (commit 245e546) after optimization broke service discovery.
+
+**Planned Implementation Steps** (step-by-step to avoid breaking functionality):
+
+**Phase 1: Exact Name Filtering**
+- Replace `contains()` matching with exact name matching for service filters
+- Change `service_name.contains(pattern) || pattern.contains(service_name)` to `service_name == pattern`
+- Test: Ensure cmbox remains visible with exact service names in config
+- Commit and test after each change
+
+**Phase 2: Remove User Service Collection** 
+- Remove all `sudo -u` systemctl commands for user services
+- Remove user_unit_files_output and user_units_output logic
+- Keep only system service discovery via `systemctl list-units --type=service`
+- Test: Verify system services still discovered correctly
+
+**Phase 3: Add Wildcard Support**
+- Implement glob pattern matching for service filters
+- Support patterns like "nginx*" to match "nginx", "nginx-config-reload", etc.
+- Use fnmatch or similar for wildcard expansion
+- Test: Verify patterns work as expected
+
+**Phase 4: Optimize systemctl Calls**
+- Cache service status information during discovery
+- Eliminate redundant `systemctl is-active` and `systemctl show` calls per service
+- Parse status from `systemctl list-units` output directly
+- Test: Ensure performance improvement without functionality loss
+
+**Phase 5: Include-Only Discovery**
+- Remove auto-discovery of all services
+- Only check services explicitly listed in service_name_filters
+- Skip systemctl discovery entirely, use configured list directly
+- Test: Verify only configured services are monitored
+
+**Critical Requirements:**
+- Each phase must be tested independently
+- cmbox must remain visible in dashboard after each change
+- No functionality regressions allowed
+- Commit each phase separately with descriptive messages
+
+**Rollback Strategy:**
+- If any phase breaks functionality, immediately revert that specific commit
+- Do not attempt to "fix forward" - revert and redesign the problematic step
+- Each phase should be atomic and independently revertible
+
 ## Core Architecture Principles - CRITICAL
 
 ### Individual Metrics Philosophy

TODO.md

@@ -1,8 +1,17 @@
 # TODO
 
-## Show logged in users (agent/dashboard)
+## Systemd filtering (agent)
+
+- remove user systemd collection
+- reduce number of systemctl call
+- Cahnge so only services in include list are detected
+- Filter on exact name
+- Add support for "\*" in filtering
+
+## System panel (agent/dashboard)
 
 - Add support to show login users
+- Add support to show timestamp/version for latest nixos rebuild
 
 ## Keyboard navigation and scrolling (dashboard)