# biz42 > A plain-text, outside-in business model for the age of coding agents, grounded in ISO 9001:2015. > It links market signals and stakeholder expectations to risks and opportunities, objectives, > measures, owners, capabilities and products — so every feature can be traced to a business reason. If you are an AI agent asked to create or update a biz42 model: 1. Run `npx @biz42/cli guide` for the workflow and the chapter order. 2. Work one chapter at a time with `npx @biz42/cli guide chapter `, starting with 1 (Scope). Ask your human: business context cannot be derived from the repository. 3. Look up the fields of a block type with `npx @biz42/cli explain ` (scope, signal, expectation, risk, opportunity, objective, measure, owner, capability, product, evaluation, improvement, cashflow). 4. The model is consistent when `npx @biz42/cli validate --strict` exits 0. `npx @biz42/cli rules` explains every rule. Each element is prose followed by a `:::` block whose fields reference other elements by id: - signal, expectation: `surfaces` → risk, opportunity - objective: `addresses` → risk, opportunity; `measured-by` → measure; `owner` → owner; `requires` → capability - capability: `enables` → product; `owner` → owner - product: `fulfills` → expectation; `owner` → owner - evaluation: `evaluates` → measure - improvement: `triggered-by` → evaluation; `addresses` → objective, capability, product ## Docs - [The model](https://mrsimpson.github.io/biz42/model/): every element type, its ISO 9001 clause and its references - [Business development as pull requests](https://mrsimpson.github.io/biz42/evolution/): `biz42 diff` and review - [README](https://github.com/mrsimpson/biz42#readme) ## Examples - [ACME Emergency](https://mrsimpson.github.io/biz42/acme-emergency/): a complete model - [Assistify](https://mrsimpson.github.io/biz42/assistify/): a retrospective model of a finished venture