Path: platform engineer

You will change webapp/, frontend/, tools/ or the wiki. Two days, in this order.

On the rendered wiki each step has a checkbox remembered in your browser; on GitHub, tick them in your head.

1. Read the reverence checklist and what Sri Guru Granth Sahib Ji is — the one rule, in your words.
2. Run it locally: make doctor, make dataset, python3 webapp/serve.py, and open /api/health.
3. How the three repositories fit and the dataset pin: where the database comes from and why you never edit it.
4. Architecture overview, then the request lifecycle and bounded contexts and the gateway.
5. Anatomy of a line record — use the Ang explorer on Angs 1, 712 and 1256.
6. The search waterfall, then modes and tiers and the Roman fold.
7. Exercise 01 — trace a search.
8. The verification engine and harnesses and golden vectors.
9. The JSON API, API routes, contract and OpenAPI, versioning and caching.
10. Exercise 02 — add a route and watch the gates.
11. Engineering invariants — read every bullet; they are what a reviewer checks.
12. CI gates, branching and delivery, the deploy runbook.
13. Exercise 03 — bump a pin in a scratch branch.
14. Your first pull request — then open a real one.

When you are done you can explain, without notes, why /api/search reports a mode, why the fold lives in three places, why a deploy is verified by commit, and why none of it may touch a single character of the text.