Implement Telemetry

Update tech design & roadmap

Open a new chat. Select Claude Opus.

Read specs/tech-design.md.

We want to add custom telemetry to the rental extension — track when bookings are created,
cars are picked up and returned, rentals are prolonged, and billing failures occur.

Add a telemetry section to specs/tech-design.md.
Update specs/roadmap.md — add Telemetry as the next planned feature.
Do not change anything else.

Commit both files.

SDD loop

Now follow the standard loop in the same chat:

1. Spec — create-feature-spec
2. Implement — Implement the feature spec.

3. Test — trigger actions in BC, wait 3–5 minutes for signals to land in Application Insights, then query via Telemetry Buddy:

   • "How many bookings were created today grouped by car?"
   • "Show billing failures in the last 24 hours."

4. Docs — generate-docs

5. Finalise — finalise-feature, merge, replan

Summary →