# zlh-grind

Execution workspace for **ZeroLagHub (ZLH)**.

This repo is intentionally lightweight and is used for:
- handovers / "where we left off" notes
- architecture decisions + rationale
- config snippets worth preserving
- TODO lists that don't belong in a code repo

## Latest handover (2026-02-07)

- `SCRATCH/2026-02-07_customer-id-schema.md`
  - Why a newly registered user looked "hashed" (it's Prisma `cuid()`),
  - Why `ContainerInstance.customerId` got polluted with `u-dev-001`,
  - The chosen short-term rule: **use `req.user.id` everywhere**.

- `SCRATCH/2026-02-07_prometheus-grafana.md`
  - Prometheus HTTP service discovery via API `/sd/exporters`,
  - Grafana dashboard import gotchas + the "CPU doesn't match top" note,
  - Next steps to power portal server cards with metrics.

- `SCRATCH/2026-02-07_host-controls-and-delete-failsafe.md`
  - Decision: keep delete failsafe, add host controls.

## Scratchpad

`SCRATCH/` contains one-off notes that may later be promoted into formal docs.