# schematize blueprints > Blueprints of specific, essential systems — how to build them, the house way. Each blueprint is a buildable recipe with the non-negotiable engineering floors and the reasoning behind them. Every blueprint is a human page at //, raw Markdown at /.md, and JSON at /.json. The whole corpus in one file is at /llms-full.txt. ## Blueprints - [How to build an IAM broker](https://blueprint.schematize.org/iam-broker.md): A single front door for identity: one standalone service every app delegates auth to via OIDC / OAuth 2.1 + PKCE — with identity ≠ email, a 2-factor baseline, rotating refresh tokens, a risk engine, and thin, verifiable tokens.