plano-observability-debugging

# Plano Observability and Debugging Use this skill to make routing and latency behavior inspectable and debuggable. ## When To Use - "Enable tracing correctly" - "Add useful span attributes" - "Debug why a request routed incorrectly" - "Inspect filter/model latency from traces" ## Apply These Rules - `observe-tracing` - `observe-span-attributes` - `observe-trace-query` ## Execution Checklist 1. Enable tracing with environment-appropriate sampling. 2. Add useful static and header-derived span attributes. 3. Use `planoai trace` filters to isolate route and latency issues. 4. Prefer trace evidence over assumptions in recommendations. 5. Return exact commands to reproduce and validate findings.