What this is A conversation starter for stakeholders. Every one of the 365 categories from the full technical map, listed by name and number and grouped into 10 rings. Print it, mark what matters, and use it to pick what you actually build next.
What it is not A build plan. A typical SaaS touches 40–60 of these meaningfully; a focused internal tool touches 8–12. The value is in the menu, not the mandate — pick 5–10 per session and drop the rest.
How to use it Scan by ring to find the layer you are designing. Circle, discuss, prioritise. Pair with the cost index to triage by effort, and with the full technical map to hand chosen categories to a coder.