domain-model

name	domain-model
description	Actively build and sharpen a project's domain model - challenge terms against the glossary, stress-test boundaries with scenarios, cross-reference against the code, and record the glossary (CONTEXT.md) and decisions (ADRs) the moment they crystallise. Use when you are changing the domain model itself, pinning down a ubiquitous language, or recording an architectural decision.
disable-model-invocation	true
metadata	{"source":"https://github.com/mattpocock/skills"}

Domain modelling

Actively build and sharpen the project's domain model as you design. This is the active discipline - challenging terms, inventing edge-case scenarios, and writing the glossary and decisions down the moment they crystallise. Merely reading CONTEXT.md for vocabulary is not this skill; that is a one-line habit any skill can do. This skill is for when you are changing the model, not just consuming it.

File structure

Most repos have a single context:

/
├── CONTEXT.md
├── docs/
│   └── adr/
│       ├── 0001-event-sourced-orders.md
│       └── 0002-postgres-for-write-model.md
└── src/

If a CONTEXT-MAP.md exists at the root, the repo has multiple contexts. The map points to where each one lives:

/
├── CONTEXT-MAP.md
├── docs/
│   └── adr/                          ← system-wide decisions
├── src/
│   ├── ordering/
│   │   ├── CONTEXT.md
│   │   └── docs/adr/                 ← context-specific decisions
│   └── billing/
│       ├── CONTEXT.md
│       └── docs/adr/