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.)
Most repos have a single context:
\n/\n├── CONTEXT.md\n├── docs/\n│ └── adr/\n│ ├── 0001-event-sourced-orders.md\n│ └── 0002-postgres-for-write-model.md\n└── src/\nIf a CONTEXT-MAP.md exists at the root, the repo has multiple contexts. The map points to where each one lives:
/\n├── CONTEXT-MAP.md\n├── docs/\n│ └── adr/ ← system-wide decisions\n├── src/\n│ ├── ordering/\n│ │ ├── CONTEXT.md\n│ │ └── docs/adr/ ← context-specific decisions\n│ └── billing/\n│ ├── CONTEXT.md\n│ └── docs/adr/\nCreate files lazily: only when you have something to write. If no CONTEXT.md exists, create one when the first term is resolved. If no docs/adr/ exists, create it when the first ADR is needed.
When the user uses a term that conflicts with the existing language in CONTEXT.md, call it out immediately. \"Your glossary defines 'cancellation' as X, but you seem to mean Y. Which is it?\"
When the user uses vague or overloaded terms, propose a precise canonical term. \"You're saying 'account': do you mean the Customer or the User? Those are different things.\"
\nWhen domain relationships are being discussed, stress-test them with specific scenarios. Invent scenarios that probe edge cases and force the user to be precise about the boundaries between concepts.
\nWhen the user states how something works, check whether the code agrees. If you find a contradiction, surface it: \"Your code cancels entire Orders, but you just said partial cancellation is possible. Which is right?\"
\nWhen a term is resolved, update CONTEXT.md right there. Don't batch these up: capture them as they happen. Use the format in CONTEXT-FORMAT.md.
CONTEXT.md should be totally devoid of implementation details. Do not treat CONTEXT.md as a spec, a scratch pad, or a repository for implementation decisions. It is a glossary and nothing else.
Only offer to create an ADR when all three are true:
\nIf any of the three is missing, skip the ADR. Use the format in ADR-FORMAT.md.
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