Babysitter domain-model-extractor

Extract domain models from monolithic codebases using DDD principles for microservices decomposition

install

source · Clone the upstream repo

git clone https://github.com/a5c-ai/babysitter

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/a5c-ai/babysitter "$T" && mkdir -p ~/.claude/skills && cp -r "$T/library/specializations/code-migration-modernization/skills/domain-model-extractor" ~/.claude/skills/a5c-ai-babysitter-domain-model-extractor && rm -rf "$T"

manifest: library/specializations/code-migration-modernization/skills/domain-model-extractor/SKILL.md

Domain Model Extractor Skill

Extracts domain models from monolithic codebases using Domain-Driven Design principles to support microservices decomposition.

Purpose

Enable domain analysis for:

Bounded context identification
Aggregate detection
Entity relationship mapping
Domain event discovery
Ubiquitous language extraction

Capabilities

1. Bounded Context Identification

Analyze code modules
Identify domain boundaries
Map team ownership
Define context relationships

2. Aggregate Detection

Find aggregate roots
Map entity relationships
Identify invariants
Define consistency boundaries

3. Entity Relationship Mapping

Extract entities
Map relationships
Identify value objects
Document associations

4. Domain Event Discovery

Find implicit events
Map state changes
Identify triggers
Document event flows

5. Ubiquitous Language Extraction

Build domain vocabulary
Map term usage
Identify synonyms
Create glossary

6. Context Map Generation

Map context relationships
Identify integration patterns
Document shared kernels
Define anti-corruption layers

Tool Integrations

Tool	Purpose	Integration Method
EventStorming tools	Domain discovery	Manual/Digital
Architecture analyzers	Code analysis	CLI
Visualization tools	Context mapping	Export
Custom AST analyzers	Code parsing	CLI

Output Schema

{
  "extractionId": "string",
  "timestamp": "ISO8601",
  "domain": {
    "boundedContexts": [
      {
        "name": "string",
        "purpose": "string",
        "aggregates": [],
        "entities": [],
        "events": [],
        "services": []
      }
    ],
    "contextMap": {
      "relationships": []
    }
  },
  "ubiquitousLanguage": {
    "terms": []
  },
  "recommendations": {
    "serviceDecomposition": [],
    "integrationPatterns": []
  }
}

Integration with Migration Processes

monolith-to-microservices: Domain analysis
migration-planning-roadmap: Strategic design

Related Skills

```
architecture-analyzer
```
: Structure analysis

Related Agents

```
ddd-analyst
```
: DDD expertise
```
microservices-decomposer
```
: Service extraction