majiayu000 Domain Extractor
Extract pure business domain from code. Output contains ZERO technology terms.
Purpose
Transform code into a business specification that:
- A CEO can understand
- Survives technology changes
- Captures what the system DOES, not HOW
Activation
- "What does this codebase do?"
- "Extract the business logic"
- "Document this for stakeholders"
- "I need to understand this legacy system"
Process
Step 1: Analyze Code (10-15 min)
Read the codebase looking for:
- Models/Entities → Domain concepts
- Validation → Business rules
- Controllers/Handlers → Workflows
- Error messages → User expectations
Step 2: Translate to Business Language
Forbidden terms (if you write these, rewrite):
API, REST, GraphQL, HTTP, endpoint, request, response,
database, SQL, query, schema, table, cache, session, token,
component, frontend, backend, server, client, service,
function, class, method, controller, middleware
Translation examples:
| Code | Business Language |
|---|---|
POST /api/orders |
Customer places order |
SELECT * FROM users |
Look up customer |
validateCart() |
Verify order is valid |
sendEmail() |
Notify customer |
redis.cache() |
Remember for quick access |
Step 3: Produce Output
Generate this exact format:
# Domain Specification: [System Name]
## Purpose
[One paragraph: What business problem this solves]
## Actors
- **[Actor 1]**: [Role description]
- **[Actor 2]**: [Role description]
## Core Concepts
| Concept | Definition |
|---------|------------|
| [Name] | [Business meaning] |
## Workflows
### [Workflow 1 Name]
1. [Actor] [action] [object]
2. System [verifies/records/notifies] [what]
3. [Result]
### [Workflow 2 Name]
...
## Business Rules
- [Rule 1]
- [Rule 2]
## Constraints
- [Constraint 1]
- [Constraint 2]
Validation
Before delivering, verify:
- Read aloud - would a non-technical person understand every word?
- Search for forbidden terms - zero should appear
- Check completeness - all major code paths represented?
Example
See references/example.md for complete input/output example.
Output
Single markdown document: Domain Specification
No tech stack recommendations. No architecture proposals. Just pure domain.