domain-model

name	domain-model
description	Grilling session that challenges your plan against the existing domain model, sharpens terminology, and updates CONTEXT.md inline as decisions crystallise. Use when user wants to stress-test a plan against their project's language and documented decisions.
disable-model-invocation	true

Interview me relentlessly about every aspect of this plan until we reach a shared understanding. Walk down each branch of the design tree, resolving dependencies between decisions one-by-one. For each question, provide your recommended answer.

Ask the questions one at a time, waiting for feedback on each question before continuing.

If a question can be answered by exploring the codebase, explore the codebase instead.

Domain awareness

Read CONTEXT.md at the repo root before the interview begins. If it doesn't exist, create it now — don't wait.

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. "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. "You're saying 'account' — do you mean the Customer or the User? Those are different things."

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 does X, but you just said Y — which is right?" Note: a contradiction between the stated design and the code requires the user to decide which is authoritative — don't silently patch the docs to match the code.

Update CONTEXT.md inline

When a term is resolved, update CONTEXT.md right there. Don't batch — capture while the decision is live.

Per-term format:

## TermName

_Avoid:_ synonym or related term easily confused with this one

One-sentence definition capturing what makes this term precise.

What goes wrong when it's confused with the avoided term.

Optional sections (use when they earn their place):

• Relationships — when terms have structural connections (cardinality, ownership, lifecycle), add a ## Relationships section with prose statements: "An Authority owns exactly one Room", "A Session belongs to one Room and one client". Useful when terms can be defined individually but connections between them are non-obvious.
• Grouping — when the glossary grows past ~15 terms and natural clusters emerge (subdomain, lifecycle, actor), group terms under ## Group Name headings. Don't force grouping below that threshold.

Don't couple CONTEXT.md to implementation details. Only include terms meaningful to someone reasoning about the design, not the code.

Re-running

When invoked on a repo with existing CONTEXT.md:

1. Read the file first
2. Incorporate new terms from the current session
3. Update definitions if understanding has evolved
4. Re-flag any new ambiguities

Don't rewrite from scratch.