Doc Navigator

Navigate codebase documentation efficiently by checking known doc locations first, before resorting to grep/glob searches.

When to Use

• Finding architectural decisions (ADRs)
• Locating feature specs or API docs
• Researching codebase before implementation
• Suggesting documentation structure for new projects
• Alternative to grep/glob for doc discovery

Quick Start

1. Check for docs directory at project root
2. Scan for common doc file patterns
3. If docs exist → map topics to locations
4. If no docs → suggest documentation structure (see references/doc-patterns.md)

Common Documentation Locations

Check these locations in order:

project-root/
├── docs/                    # Primary documentation
│   ├── architecture/        # System design, ADRs
│   ├── features/            # Feature specs
│   ├── api/                 # API documentation
│   └── guides/              # How-to guides
├── .github/                 # GitHub-specific docs
│   └── docs/
├── README.md                # Project overview
├── ARCHITECTURE.md          # High-level architecture
├── CONTRIBUTING.md          # Contribution guidelines
└── doc/ or documentation/   # Alternative doc folders

Topic-to-Location Mapping

Looking for...	Check first
Project overview	README.md
Architecture/design	docs/architecture/, ARCHITECTURE.md, docs/adr/
Feature specs	docs/features/, docs/specs/
API reference	docs/api/, api-docs/, OpenAPI/Swagger files
Setup/installation	docs/guides/setup.md, INSTALL.md
Database schema	docs/database/, docs/schema/, prisma/schema.prisma
Data types/models	docs/types/, docs/models/, src/types/, src/models/
Style guide	docs/style-guide.md, docs/conventions.md, .eslintrc, STYLE.md
Environment config	docs/config/, .env.example, docs/environment.md
Testing strategy	docs/testing/, tests/README.md
Deployment	docs/deployment/, docs/infrastructure/
ADRs (decisions)	docs/adr/, docs/decisions/, architecture/decisions/
ADRs (fallback)	CHANGELOG.md, git log, PR descriptions, code comments

Discovery Workflow

1. ls docs/ (or doc/, documentation/)
   ↓ exists?
   YES → scan structure, build topic map
   NO  → check for standalone doc files (*.md in root)
         ↓ found?
         YES → use available docs
         NO  → suggest creating docs structure
               (see references/doc-patterns.md)

Automated Discovery

Run the scanner script to map available documentation:

python3 scripts/scan_docs.py [project-path]

Output: JSON map of topics → file locations

When Docs Don't Exist

If the codebase lacks documentation:

1. Inform user: "No documentation structure found"
2. Offer to create starter docs: view references/doc-patterns.md
3. Suggest minimal viable structure based on project type

Finding Decisions Without ADRs

If no formal ADRs exist, extract architectural context from:

CHANGELOG.md        → Breaking changes, migration rationale
git log             → Commits w/ "migrate", "refactor", "replace"
PR/MR descriptions  → Discussion threads on major changes
Issue tracker       → Closed RFCs, architecture proposals
Code comments       → // DECISION:, // WHY:, // HACK:

See references/doc-patterns.md → "Fallback: When No ADRs Exist" for git commands & reconstruction templates.

Integration with Research Phase

Use doc-navigator BEFORE grep/glob when:

• Starting work on unfamiliar codebase
• Looking for architectural context
• Understanding feature implementations
• Finding API contracts or schemas

Fall back to grep/glob when:

• Docs don't cover the specific topic
• Need to find implementation details in code
• Searching for specific function/class usage

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Ref: references/doc-patterns.md for documentation templates when establishing new docs.