Overview
A working notebook for turning a question into a thing that can be tested, felt, and improved.
Problem
Casset already has health, telemetry, request correlation, and several code-owned controls, but the operating story is distributed and difficult to inspect as one product.
Goals
- Bring profile/catalog health, recent failures, and deployment context into one legible internal surface.
- Define a canonical event funnel and its data-quality limits.
- Document release verification, safe-off, incident, migration, and rollback practices.
Architecture
Existing health endpoint and Redis telemetry → server-owned operations projection → quiet internal interface with explicit authorization.
Design
An engineering notebook, not a dashboard wall: recent evidence, clear ownership, and only the controls that genuinely reduce recovery time.
Implementation
Inventory existing signals and flags before adding data. Build the smallest read-only view, then add one safe intervention with an audit trail.
Lessons
- Operational visibility is useful when it leads to a specific action.
- A safe-off path is part of the product's failure design.
Future improvements
Add release history and product funnel context only after the basic health and ownership model is trusted.