{"id":19990,"plugin_id":"plugins_6aa191da1fc481918b1b2cdf6adf2f7b","kind":"skill","collection_source":null,"comparison_source":null,"observed_at":"2026-09-30T23:15:59.053Z","digest":"8478aff3cd6b6770721bd9a1ae58b2a4fb789c9f8e89c2ffd3b3e2bf51d2a20a","against":null,"payload":{"name":"domain-modeling","description":"Build and sharpen a project's domain model. Use when discussing codebase terminology, writing or editing a CONTEXT.md, or recording or editing an ADR.","included_files":[{"relative_path":"ADR-FORMAT.md","size_in_bytes":2733},{"relative_path":"CONTEXT-FORMAT.md","size_in_bytes":2290},{"relative_path":"agents/openai.yaml","size_in_bytes":101}],"skill_md_contents":"---\nname: domain-modeling\ndescription: Build and sharpen a project's domain model. Use when discussing codebase terminology, writing or editing a CONTEXT.md, or recording or editing an ADR.\n---\n\n# Domain Modeling\n\nActively 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.)\n\n## File structure\n\nMost repos have a single context:\n\n```\n/\n├── CONTEXT.md\n├── docs/\n│   └── adr/\n│       ├── 0001-event-sourced-orders.md\n│       └── 0002-postgres-for-write-model.md\n└── src/\n```\n\nIf a `CONTEXT-MAP.md` exists at the root, the repo has multiple contexts. The map points to where each one lives:\n\n```\n/\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/\n```\n\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.\n\n## During the session\n\n### Challenge against the glossary\n\nWhen 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?\"\n\n### Sharpen fuzzy language\n\nWhen 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.\"\n\n### Discuss concrete scenarios\n\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.\n\n### Cross-reference with code\n\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?\"\n\n### Update CONTEXT.md inline\n\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-FORMAT.md).\n\n`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.\n\n### Offer ADRs sparingly\n\nOnly offer to create an ADR when all three are true:\n\n1. **Hard to reverse**: the cost of changing your mind later is meaningful\n2. **Surprising without context**: a future reader will wonder \"why did they do it this way?\"\n3. **The result of a real trade-off**: there were genuine alternatives and you picked one for specific reasons\n\nIf any of the three is missing, skip the ADR. Use the format in [ADR-FORMAT.md](./ADR-FORMAT.md).\n"},"changes":[],"summary":"First saved snapshot. No earlier version is available for comparison.","summary_kind":"deterministic","summary_metadata":{}}