Knowledge Base Templates

This skill provides professional templates for creating comprehensive codebase knowledge bases. These templates help document codebases systematically, making them easier to understand and navigate for developers.

What This Skill Provides

Documentation Templates:

• index.md: Project overview and quick start guide
• concept_map.md: Domain concepts and terminology glossary
• architecture.md: System architecture with Mermaid diagrams
• modules.md: Component and module breakdown with dependency graphs
• patterns.md: Implementation patterns and coding idioms (≤150 lines)
• dependencies.md: Inter-project dependencies (monorepo)
• technology-matrix.md: Technology stack and architecture decisions (monorepo)
• state.json: Metadata and generation tracking

Two Structure Types:

• Single Project: Standard project documentation structure
• Monorepo: Multi-project documentation with cross-project dependencies

When to Use

Use this skill when:

• Creating knowledge base documentation for a codebase
• Setting up project documentation structure
• Documenting single projects or monorepos
• Generating architecture documentation
• Building technical documentation for onboarding
• User mentions "KB templates", "knowledge base", "codebase documentation"

How to Use Templates

Single Project Structure

For standard single-project repositories:

# Target structure
{RP1_ROOT}/context/
├── index.md              # Project overview
├── concept_map.md        # Domain concepts
├── architecture.md       # System architecture
├── modules.md            # Module breakdown
├── patterns.md           # Implementation patterns
└── state.json            # Metadata

Using Templates:

1. Read template: templates/single-project/index.md
2. Fill in placeholders with project-specific information
3. Write to target location: {RP1_ROOT}/context/index.md
4. Repeat for each template

Template Placeholders:

• [Project Name]: Replace with actual project name
• [Language]: Replace with programming language(s)
• [Date]: Replace with current date
• [repo-url], [commands], etc.: Replace with actual values
• Sections in brackets: Fill with project-specific content

Monorepo Structure

For repositories with multiple projects:

# Target structure
{RP1_ROOT}/context/
├── index.md              # Repository overview
├── concept_map.md        # Cross-project concepts
├── architecture.md       # System-wide architecture
├── modules.md           # Modules across projects
├── dependencies.md       # Inter-project relationships
├── technology-matrix.md  # Tech stack matrix
├── projects/             # Per-project documentation
│   ├── service-a/
│   │   ├── overview.md
│   │   ├── concept_map.md
│   │   ├── architecture.md
│   │   └── modules.md
│   └── frontend/
│       └── ...
└── state.json           # Repository metadata

Using Templates:

1. Use templates/monorepo/ templates for repository-level docs
2. Use templates/single-project/ templates for per-project docs
3. Fill placeholders with monorepo and project-specific information

Template Loading Workflow

Step 1: Determine Project Type

if is_monorepo():
    base_templates = "templates/monorepo/"
    needs_project_level = True
else:
    base_templates = "templates/single-project/"
    needs_project_level = False

Step 2: Load and Fill Templates

# Read template
template = read_file(f"{skill_path}/{base_templates}/index.md")

# Fill with analyzed data
filled = template.replace("[Project Name]", project_name)
filled = filled.replace("[Date]", current_date)
# ... more replacements

# Write to target location
write_file(f"{RP1_ROOT}/context/index.md", filled)

Step 3: Generate Diagrams Templates include Mermaid diagram placeholders. When filling templates:

• Replace example diagrams with project-specific ones
• Use the mermaid skill to validate diagram syntax
• Ensure diagrams accurately represent the codebase

Template Reference

index.md

Purpose: Entry point and navigation hub for progressive KB loading

Key Sections:

• Project summary (WHAT and WHY in 2-3 sentences)
• Quick reference table (entry point, key pattern, tech stack)
• KB File Manifest with line counts and "Load For" guidance
• Task-Based Loading profiles (code review, bug investigation, etc.)
• How to Load instructions
• Project structure tree
• Navigation links to other KB files

When to Use: Always - this is the mandatory entry point for all KB-aware agents

Progressive Loading Pattern: Index.md is designed as a "jump off" point. Agents should:

1. Load index.md first to understand project structure
2. Based on task, selectively load additional files per Task-Based Loading table
3. Never load all KB files unless performing holistic analysis

concept_map.md

Purpose: Domain concepts and terminology

Key Sections:

• Core business concepts with definitions
• Technical concepts and patterns
• Terminology glossary
• Cross-references to other docs

When to Use: Projects with domain-specific terminology or complex business logic

architecture.md

Purpose: System architecture and design

Key Sections:

• High-level architecture diagram
• Component architecture
• Data flow diagrams (sequence diagrams)
• Integration points
• Security architecture
• Performance considerations
• Deployment architecture

When to Use: Always - helps understand system design

Diagram Integration: Uses Mermaid for:

• Component diagrams (graph TB/LR)
• Sequence diagrams (sequenceDiagram)
• Should be validated with mermaid skill

modules.md

Purpose: Detailed module and component breakdown

Key Sections:

• Core modules with purposes
• Support modules
• Module dependencies graph
• Module metrics table
• Code quality insights

When to Use: Codebases with clear module structure

Diagram Integration: Uses Mermaid ER diagrams and dependency graphs

patterns.md

Purpose: Implementation patterns and coding idioms

Key Sections:

• Naming & Organization (files, functions, imports)
• Type & Data Modeling (data representation, strictness, immutability)
• Error Handling (strategy, propagation, common types)
• Validation & Boundaries (location, method, normalization)
• Observability (logging, metrics, tracing)
• Testing Idioms (organization, fixtures, levels)
• Conditional: I/O & Integration, Concurrency, DI, Extensions

When to Use: Always - helps AI and developers follow established conventions

Budget: Hard limit of 150 lines for scannability

dependencies.md (Monorepo Only)

Purpose: Inter-project dependencies and relationships

Key Sections:

• Dependency graph
• Project matrix
• Shared code impact analysis
• Build dependencies and order
• Change impact matrix

When to Use: Monorepos with multiple projects

technology-matrix.md (Monorepo Only)

Purpose: Technology stack by project

Key Sections:

• Project technologies table
• Language distribution
• Shared technologies
• Architecture decision records
• Upgrade path and roadmap

When to Use: Monorepos with multiple technology stacks

state.json

Purpose: Shareable metadata and tracking information (safe to commit)

Key Fields:

• strategy: Build strategy used (e.g., "parallel-map-reduce")
• repo_type: "single-project" or "monorepo"
• monorepo_projects: List of project directories (monorepo)
• generated_at: When analysis was performed (ISO timestamp)
• git_commit: Commit hash at generation time
• files_analyzed: Number of files processed
• languages: Detected programming languages
• metrics: Module, component, and concept counts

When to Use: Always - tracks knowledge base state

NOTE: Does NOT contain local paths. Local values are stored in meta.json.

meta.json

Purpose: Local-only values that should NOT be shared with team members

Key Fields:

• repo_root: Absolute path to repository root (local to each machine)
• current_project_path: Relative path from repo_root to current project

When to Use: Always generated alongside state.json

IMPORTANT: Add to .gitignore - these paths may differ per team member and should not be committed.

Best Practices

Template Customization

1. Keep Structure: Maintain section headings for consistency
2. Remove Unused Sections: Delete sections that don't apply
3. Add Project-Specific Sections: Extend templates as needed
4. Update Cross-References: Ensure links between docs work

Filling Templates

1. Be Specific: Replace generic placeholders with actual details
2. Keep Concise: Focus on high-value information
3. Use Examples: Include code examples where helpful
4. Validate Diagrams: Always validate Mermaid syntax

Documentation Organization

1. Progressive Disclosure: Start with index.md, link to details
2. One Level Deep: Reference other docs directly, avoid deep nesting
3. Consistent Terminology: Use same terms across all docs
4. Regular Updates: Track changes in state.json

Mermaid Diagrams

1. Use Subgraphs: Organize complex diagrams with subgraphs
2. Clear Labels: Make node and edge labels descriptive
3. Consistent Style: Use similar styling across diagrams
4. Validate Syntax: Use mermaid skill to validate before saving

Integration with Other Tools

Mermaid Skill

This skill's templates include Mermaid diagrams. Use the mermaid skill to:

• Validate diagram syntax
• Generate complex diagrams
• Fix diagram errors

Example workflow:

1. Load architecture.md template
2. Generate Mermaid diagram for project
3. Use mermaid skill to validate diagram
4. Fill template with validated diagram
5. Write completed documentation

Knowledge Build Commands

These templates are designed to work with knowledge building workflows:

• /knowledge-build: Uses these templates to generate documentation
• /knowledge-load: Loads generated knowledge bases (deprecated - agents load KB directly)
• /project-birds-eye-view: May use similar structure

Index.md Generation (Orchestrator-Owned)

Important: Index.md is generated directly by the /knowledge-build orchestrator, NOT by a sub-agent. This is because the orchestrator has visibility into all 4 sub-agent outputs and can aggregate key facts into a "jump off" entry point.

Aggregation Process

Extract data from each sub-agent's JSON output:

Data	Source Agent	JSON Path
Project summary	concept-extractor	data.concepts[0].description or domain overview
Entry points	architecture-mapper	data.entry_points[]
Key pattern	pattern-extractor	data.patterns[0].name
Tech stack	module-analyzer	data.project.frameworks[] + data.project.primary_language
Project name	spatial-analyzer	project.name or package.json
Languages	module-analyzer	data.metadata.languages[]

Calculate File Manifest

After writing concept_map.md, architecture.md, modules.md, patterns.md, calculate line counts:

wc -l {{RP1_ROOT}}/context/concept_map.md
wc -l {{RP1_ROOT}}/context/architecture.md
wc -l {{RP1_ROOT}}/context/modules.md
wc -l {{RP1_ROOT}}/context/patterns.md
# For monorepo, also:
wc -l {{RP1_ROOT}}/context/dependencies.md
wc -l {{RP1_ROOT}}/context/technology-matrix.md

Template Placeholder Mapping

Use template from templates/{single-project|monorepo}/index.md:

Placeholder	Data Source
[Project Name]	spatial-analyzer or package.json name
[Primary languages]	module-analyzer languages
[Version]	package.json version or git describe
[Date]	Current date (ISO format)
[2-3 sentences...]	Aggregated from concept-extractor domain description
[main file/command]	architecture-mapper entry_points[0]
[primary architectural pattern]	pattern-extractor patterns[0].name
[core technologies]	module-analyzer frameworks
~[N] (line counts)	wc -l results from file manifest step
[key directories]	spatial-analyzer structure or architecture-mapper
[project-a], [project-b]	spatial-analyzer monorepo_projects (monorepo only)

Generation Order

1. Write concept_map.md, architecture.md, modules.md, patterns.md first
2. Calculate line counts for file manifest
3. Fill index.md template with aggregated data
4. Write index.md last

Examples

See EXAMPLES.md for complete filled-in knowledge base examples.

Customization Guide

See REFERENCE.md for:

• Detailed template customization instructions
• Section-by-section guidance
• Best practices for each template type
• Common pitfalls and how to avoid them

Template Locations

All templates are in the templates/ directory:

templates/
├── single-project/
│   ├── index.md
│   ├── concept_map.md
│   ├── architecture.md
│   ├── modules.md
│   └── patterns.md
├── monorepo/
│   ├── index.md
│   ├── concept_map.md
│   ├── architecture.md
│   ├── modules.md
│   ├── patterns.md
│   ├── dependencies.md
│   └── technology-matrix.md
└── state.json

Access templates using Read tool with full path from skill base directory.