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7 arquivos name document-project description Generate comprehensive architecture documentation automatically from existing codebase analysis. This skill should be used when working with brownfield projects or updating outdated documentation. acceptance [{"documentation_generated":"All three documentation files created (architecture.md, standards.md, patterns.md)"},{"confidence_sufficient":"Overall confidence score ≥70% across all analyzed sections"},{"review_checklist_created":"Human review checklist generated identifying low-confidence areas"},{"configuration_updated":"Project configuration updated with documentation paths and brownfield flag"}] inputs {"codebase_path":{"type":"string","required":true,"description":"Path to codebase to analyze (e.g., src/)"},"existing_docs_mode":{"type":"enum","values":["merge","replace","supplement"],"default":"merge","description":"How to handle existing documentation"},"include_tests":{"type":"boolean","default":true,"description":"Include test file analysis in documentation"},"max_files":{"type":"number","default":1000,"description":"Maximum files to analyze (safety limit)"}} outputs {"documentation_files":{"type":"object","description":"Paths to generated documentation files"},"confidence_score":{"type":"number","description":"Overall confidence score (0-100%)"},"review_checklist":{"type":"string","description":"Path to human review checklist file"},"analysis_summary":{"type":"object","description":"Summary of analysis (files analyzed, patterns found, etc.)"}} telemetry {"emit":"skill.document-project.completed","track":["project_name","codebase_path","duration_ms","files_analyzed","lines_analyzed","confidence_score","patterns_identified"]}
Brownfield Project Documentation Generator
Generate comprehensive architecture documentation automatically by analyzing existing codebase structure, patterns, and conventions.
Purpose
Analyze an existing codebase and generate three comprehensive documentation files:
architecture.md - Project structure, tech stack, data models, API specificationsstandards.md - Coding standards, best practices, discovered conventionspatterns.md - Design patterns, architectural patterns, common conventions
This enables BMAD Enhanced to work with brownfield projects by reverse-engineering architecture from code.
When to Use This Skill
This skill should be used when:
Starting BMAD Enhanced with existing project (brownfield onboarding)
Architecture documentation is outdated or missing
Need to discover implicit patterns and conventions
Onboarding to unfamiliar codebase
This skill should NOT be used when:
Greenfield projects (write docs from scratch instead)
Project already has current, comprehensive documentation
Codebase >500K lines (too complex for automated analysis)
Project has no clear structure
Project Type Support
Well-Supported Languages:
✅ Node.js/TypeScript (excellent support)
✅ Python (good support)
✅ Go (good support)
✅ Java/Kotlin (good support)
✅ Rust (good support)
Basic Support:
⚠️ PHP, Ruby, C#/.NET (basic support)
Optimal Codebase Size: 10K-100K lines
Smaller: May lack sufficient patterns to analyze
Larger: Analysis may be too slow or complex
Sequential Documentation Generation
Execute steps in order - each builds on previous analysis:
Step 0: Configuration and Validation
Purpose: Verify project is suitable for automated documentation.
Actions:
Load config from .claude/config.yaml (codebasePath, existingDocs, includeTests, maxFiles)Validate structure: Check path exists, identify languages, count files/lines, verify size (10K-100K recommended)Check existing docs: Ask how to handle (merge/replace/supplement)
Get confirmation: Show summary (path, language, file count, lines, estimated time), ask to proceedSee: references/templates.md#step-0-configuration-and-validation-output for complete formats
Codebase path not found
No recognizable project structure
Codebase too large (>500K lines)
Unsupported language
User declines to proceed
Output: Validation confirmation (project type, lines, existing docs mode, scope, ready status)
Step 1: Analyze Project Structure Purpose: Map file organization and module structure.
Scan directory structure: Identify main dirs, detect patterns (feature vs type), note nestingAnalyze file organization: Files per dir, naming conventions, size distribution, co-location patternsDetect project type: Backend API / Frontend App / Full-Stack / Library / Monorepo (based on directory structure)Map relationships: Analyze imports, build dependency graph, identify core modules, detect circular dependencies Output: Project structure analysis with type, organization, directory structure (dirs + file counts + line counts), key patterns
See: references/templates.md#step-1-codebase-analysis-output for complete format
Step 2: Analyze Technology Stack Purpose: Identify languages, frameworks, and dependencies.
Read package configuration:
Node.js: package.jsonPython: requirements.txt, pyproject.tomlGo: go.modJava: pom.xml, build.gradleRust: Cargo.toml
Extract dependencies and identify frameworks:
Backend: Express, Django, Spring Boot, etc.
Frontend: React, Vue, Angular, etc.
Database: Prisma, TypeORM, SQLAlchemy, etc.
Testing: Jest, Pytest, JUnit, etc.
Detect runtime/platform:
Node.js/Python/JDK version
Database type (PostgreSQL, MySQL, MongoDB)
Output: Tech stack summary (runtime, backend/frontend frameworks, key libraries, testing tools, versions, confidence score)
See: references/templates.md#step-2-technology-stack-analysis for complete format
Step 3: Extract Data Models and Schemas Purpose: Document data structures and validation rules.
Locate data model files:
Prisma schema: prisma/schema.prisma
TypeScript interfaces: src/types/*.ts, src/models/*.ts
Database migrations: prisma/migrations/, migrations/
Validation schemas: Zod, Yup, Joi schemas
Parse data models and extract validation rules
Analyze relationships:
One-to-many, many-to-many
Foreign keys and constraints
Detect data flow:
Request → Validation → Service → Repository → Database
Response transformation (DTOs)
Output: Data models summary (models with fields/types/constraints, validation rules, relationships, confidence score)
See: references/templates.md#complete-architecture-md-template for data model format
Step 4: Analyze API Patterns Purpose: Document API structure and conventions.
Locate API definitions:
Express routes: src/routes/**/*.ts
Controllers: src/controllers/**/*.ts
OpenAPI/Swagger spec (if exists)
GraphQL schemas (if exists)
Extract endpoints and analyze request/response patterns:
Request validation (middleware)
Error response format
Success response format
Status codes used
Identify authentication:
JWT tokens, session-based, API keys, OAuth
Detect rate limiting and other middleware
Output: API specs summary (base URL, authentication type/headers/expiry, error/success response formats, confidence score)
See: references/templates.md#complete-architecture-md-template for API specification format
Step 5: Extract Coding Standards and Patterns Purpose: Document implicit conventions and best practices.
Analyze code style:
Read .eslintrc, .prettierrc, tsconfig.json
Detect: indentation, quotes, semicolons
Naming conventions: variables, functions, classes, files
Identify architectural patterns:
Design patterns: Repository, Factory, Strategy
Architectural style: Layered, Clean, Hexagonal
Extract error handling patterns:
Error classes
Centralized error handling
Logging patterns
Detect testing patterns:
Test organization
Mocking strategy
Test data management
Coding Standards:
Code Style:
- Indentation: 2 spaces
- Quotes: Single quotes
- Naming: camelCase (variables), PascalCase (classes), kebab-case (files)
Architectural Patterns:
1. Layered Architecture
- Routes (presentation layer)
- Services (business logic layer)
- Repositories (data access layer)
2. Dependency Injection
3. Repository Pattern
Error Handling:
- Custom error classes (AppError, ValidationError)
- Centralized error handling middleware
- Never expose stack traces to clients
Confidence: High (90%)
Step 6: Generate Architecture Documentation Purpose: Create comprehensive architecture.md from findings.
Load architecture template structure
Populate sections with analyzed data from Steps 1-5:
Overview, tech stack, project structure
Data models, API specifications
Include confidence scores where applicable
Add source file references
Generate diagrams (optional):
Mermaid diagrams for architecture layers
Data model ERD
API endpoint map
Add human review notes for medium/low confidence sections
Write documentation file:
Create docs/architecture.md
Or merge with existing docs if "merge" mode selected
✓ Architecture documentation generated
✓ File: docs/architecture.md (2,450 lines)
✓ Sections: 12
✓ Overall confidence: 85%
✓ Human review items: 5
Step 7: Generate Standards Documentation Purpose: Create standards.md from discovered patterns.
Extract standards from code analysis:
Security standards (from security practices)
Testing standards (from test patterns)
Code quality standards (from ESLint rules)
Performance standards (from observed patterns)
Document best practices:
Observed consistently across codebase
Mark as "discovered" vs "recommended"
Create standards document with examples and consistency scores
✓ Standards documentation generated
✓ File: docs/standards.md (850 lines)
✓ Standards extracted: 18
✓ Consistency scores: 75-100%
Step 8: Generate Patterns Documentation Purpose: Document discovered design patterns and conventions.
Extract design patterns:
Repository, Factory, Strategy, Middleware patterns
Document usage examples:
Show code examples of each pattern
Explain when to use
Link to existing implementations
Identify anti-patterns:
Code smells detected
Inconsistencies
Technical debt
Create patterns document
✓ Patterns documentation generated
✓ File: docs/patterns.md (620 lines)
✓ Patterns identified: 8
✓ Anti-patterns noted: 3
Step 9: Validation and Confidence Scoring Purpose: Score accuracy and identify areas needing human review.
Calculate confidence: Score each section (tech stack, structure, data models, API, standards) and compute overallIdentify low-confidence areas: Find sections <70%, conflicting patterns, missing infoGenerate review checklist: List high/medium priority items needing human verificationCreate validation report Output: Validation summary (overall confidence %, high/medium priority review item counts)
See: references/templates.md#review-checklist-template and references/confidence-scoring.md for formats
Step 10: Summary and Next Steps Purpose: Provide user with clear summary and action items.
Generate summary report: Project name, duration, files analyzed, confidence, generated docs (paths + line counts), key findings (type, arch, tech stack, test coverage), next stepsCreate review checklist file: docs/REVIEW_CHECKLIST.mdUpdate config: Set brownfield flag, doc paths, documented=truePrompt next action: Review items, create task spec, run index-docs, or exit Output: Summary confirmation (report generated, checklist created, config updated, ready status)
See: references/templates.md for complete summary formats
Confidence Scoring Guidelines High (85-100%): Explicit in code/config, consistent patterns, no conflicts | Medium (70-84%): Inferred from patterns, some inconsistencies, needs validation | Low (<70%): Missing/unclear info, conflicts, high uncertainty, MUST review
See: references/confidence-scoring.md for detailed scoring methodology
Limitations Cannot: Understand business logic without context, document deployment infrastructure, capture tribal knowledge, understand legacy decisions, document external integrations perfectly
Requires: Readable structured codebase, standard organization, supported language/framework, 10K-100K lines (optimal)
Best Practices Run periodically (every 3-6 months) | Always review low-confidence sections | Supplement with manual docs (business context, deployment) | Use as starting point, enhance with team input
Integration with Planning Workflow Brownfield: document-project → index-docs → create-task-spec (use generated docs) | Greenfield: Write docs manually first | Brownfield: Generate from code, then refine
References Detailed documentation in references/:
templates.md : All output formats, complete architecture/standards/patterns templates, analysis summaries, review checklists, error templatesanalysis-techniques.md : Analysis methods for structure, tech stack, models, APIs, patternspattern-detection.md : Pattern identification and documentation techniquesdocumentation-templates.md : Templates for architecture, standards, patterns docsconfidence-scoring.md : Confidence calculation methodology and validation criteriavalidation-criteria.md : Project validation rules and sizing guidelines 