Domain Modeling

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's a one-line habit any skill can do. This skill is for when you're changing the model, not just consuming it.)

File structure

External docs location

Before touching any paths below, check $(git rev-parse --git-common-dir)/grill-context (worktree-safe — see domain.md for why). If it exists, its contents (a trimmed path) replace the repo root for everything below — layout unchanged, only the root moves. Read-only: this skill never writes the pointer file.

Most repos have a single context: