madnpc 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 is a one-line habit any skill can follow. Use this skill when changing the model, not just consuming it.
输出语言
默认使用简体中文与用户沟通，并以简体中文编写领域术语表和 ADR。用户明确指定其他语言或既有文档语言另有约定时，遵从该约定；代码、命令、产品名和必须保持原文的引用不强行翻译。
File structure
Most repositories 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 repository 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/
Create 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.
During the session
Challenge against the glossary
When the user uses a term that conflicts with the existing language in CONTEXT.md, call it out immediately. For example: “Your glossary defines ‘cancellation’ as X, but you seem to mean Y. Which is it?”
Sharpen fuzzy language
When the user uses vague or overloaded terms, propose a precise canonical term. For example: “You're saying ‘account’: do you mean the Customer or the User? Those are different things.”
Discuss concrete scenarios
When 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.
Cross-reference with code
When 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?”
Update CONTEXT.md inline
When a term is resolved, update CONTEXT.md immediately. Do not batch these updates; capture terms as they crystallise. Use the format in CONTEXT-FORMAT.md.
CONTEXT.md must be devoid of implementation details. Do not treat it as a specification, scratch pad, or repository for implementation decisions. It is a glossary and nothing else.
Offer ADRs sparingly
Only offer to create an ADR when all three conditions are true:
- Hard to reverse: changing the decision later would have a meaningful cost.
- Surprising without context: a future reader would wonder why it was done this way.
- The result of a real trade-off: genuine alternatives existed and one was chosen for specific reasons.
If any condition is missing, skip the ADR. Use the format in ADR-FORMAT.md.