Developer reference

Factual pages, each naming its source of truth.

Page	Source of truth
CI/CD	.github/workflows/
Ratchets and quality gates	medbrains/scripts/check_*.py and their baselines
Modules, flags and settings	crates/medbrains-core/src/bricks.rs, tenant_settings
Environment variables	Generated from the crates and .env.example
OS build	medbrains/os/README.md, medbrains/Makefile
Permissions	crates/medbrains-core/src/permissions.rs
API reference	Generated from docs/openapi.json