Imported from David-Li0406/meta-skill-evloving (skill-flow/data/skills-refined-autoskill-36k/skillsmp/qa-docs-coverage/SKILL.md). Install upstream with npx skills add David-Li0406/meta-skill-evloving --skill qa-docs-coverage. Copyright stays with the author.

QA Docs Coverage (Jan 2026) — Discovery, Freshness, and Runbook Quality

Modern Best Practices (January 2026)

• AI-assisted audits: Use Mintlify, DocuWriter.ai, or Documentation.AI for automated doc generation; require human review before publish
• Documentation observability: Track freshness, coverage %, and staleness via CI dashboards—treat docs like production data
• Contract-first coverage: Validate OpenAPI/AsyncAPI specs against actual code; use Swagger Coverage for gap detection
• Spectral linting: Enforce API doc standards with Spectral rulesets in CI
• MCP server integration: Connect AI agents to live documentation context via MCP servers
• Runbook testability: Every runbook must be executable in staging; use synthetic tests for validation
• Cross-platform documentation: Use AGENTS.md standard with symlinks to CLAUDE.md for multi-tool compatibility (AGENTS.md Standard)
• Context extraction tools: Use gitingest or repo2txt for large codebase analysis before documentation audits

This skill provides operational workflows for auditing existing codebases, identifying documentation gaps, and systematically generating missing documentation. It complements docs-codebase by providing the discovery and analysis layer.

Key Principle: Templates exist in docs-codebase. This skill tells you what to document and how to find undocumented components.

Core references: Diataxis (doc structure), OpenAPI (REST), AsyncAPI (events).

When to Use This Skill

Invoke this skill when:

• Auditing documentation coverage for an existing codebase
• Generating documentation for legacy or underdocumented projects
• Creating documentation coverage reports
• Systematically documenting APIs, services, events, or database schemas
• Onboarding to a new codebase and need to understand what's documented vs not
• Preparing for compliance audits requiring documentation
• Setting up documentation maintenance processes
• Working with large codebases (100K-1M LOC) — see Large Codebase Audit section

Large Codebase Audit (100K-1M LOC)

For large codebases, the key principle is: LLMs don't need the entire codebase—they need the right context for the current task.

Phase 0: Context Extraction

Before starting an audit, extract codebase context using tools:

Hierarchical Audit Strategy

For monorepos and large projects, audit hierarchically:

1. Root Level (Week 1)
   ├── AGENTS.md / CLAUDE.md exists?
   ├── README.md quality
   ├── ARCHITECTURE.md exists?
   └── docs/ directory structure

2. Module Level (Week 2-3)
   ├── Each major directory has AGENTS.md?
   ├── API documentation complete?
   └── Service boundaries documented?

3. Component Level (Week 4+)
   ├── Individual component READMEs
   ├── Code comments quality
   └── Test documentation

Cross-Platform Documentation Audit

Check for multi-tool compatibility:

[ ] AGENTS.md exists (cross-platform standard)
[ ] CLAUDE.md exists or symlinked to AGENTS.md
[ ] GEMINI.md symlinked (if using Gemini)
[ ] File size under 300 lines (use @references for depth)
[ ] Subdirectory docs for each major module

Large Codebase Coverage Checklist

LARGE CODEBASE AUDIT CHECKLIST

Context Extraction:
[ ] Generated codebase dump (gitingest/repo2txt)
[ ] Created directory structure overview
[ ] Identified major modules/services

Root Documentation:
[ ] AGENTS.md / CLAUDE.md present and <300 lines
[ ] README.md with quick start
[ ] ARCHITECTURE.md with system overview
[ ] Symlinks configured for cross-platform

Module Documentation:
[ ] Each major directory has AGENTS.md
[ ] API endpoints documented
[ ] Database schemas documented
[ ] Event/message contracts documented

Maintenance:
[ ] Documentation ownership assigned
[ ] Freshness tracking enabled
[ ] CI/CD checks configured

Sources: Anthropic Claude Code Best Practices, OpenAI AGENTS.md Guide

Core QA (Default)

What “Docs as QA” Means

• Treat docs as production quality artifacts: they reduce MTTR, enable safe changes, and define expected behavior.
• REQUIRED doc types for reliability and debugging ergonomics:
  • “How to run locally/CI” and “how to test”.
  • Operational runbooks (alerts, common failures, rollback).
  • Service contracts (OpenAPI/AsyncAPI) and schema examples.
  • Known issues and limitations (with workarounds).

Coverage Model (Risk-Based)

• Prioritize docs by impact:
  • P1: externally consumed contracts and failure behavior (OpenAPI/AsyncAPI, auth, error codes, SLOs).
  • P2: internal integration and operational workflows (events, jobs, DB schema, runbooks).
  • P3: developer reference (configs, utilities).

Freshness Checks (Prevent Stale Docs)

• Define owners, review cadence, and a “last verified” field for critical docs.
• CI economics [Inference]:
  • Block PRs only for missing/invalid P1 docs.
  • Warn for P2/P3 gaps; track via backlog.
• Run link checks and linting as fast pre-merge steps.

Runbook Testability

• A runbook is “testable” if a new engineer can follow it and reach a measurable end state.
• Include: prerequisites, exact commands, expected outputs, rollback criteria, and escalation paths.

Do / Avoid

Do:

• Keep docs close to code (same repo) and version them with changes.
• Use contracts and examples as the source of truth for integrations.

Avoid:

• Large "doc-only" projects with no owners and no CI gates.
• Writing runbooks that cannot be executed in a sandbox/staging environment.

Quick Reference

Decision Tree: Documentation Audit Workflow

User needs: [Audit Type]
    ├─ Starting fresh audit?
    │   ├─ Public-facing APIs? → Priority 1: External-Facing (OpenAPI, webhooks, error codes)
    │   ├─ Internal services/events? → Priority 2: Internal Integration (endpoints, schemas, jobs)
    │   └─ Configuration/utilities? → Priority 3: Developer Reference (options, helpers, constants)
    │
    ├─ Found undocumented component?
    │   ├─ API/Controller? → Scan endpoints → Use api-docs-template → Priority 1
    │   ├─ Service/Handler? → List responsibilities → Document contracts → Priority 2
    │   ├─ Database/Entity? → Generate ER diagram → Document entities → Priority 2
    │   ├─ Event/Message? → Map producer/consumer → Schema + examples → Priority 2
    │   └─ Config/Utility? → Extract options → Defaults + descriptions → Priority 3
    │
    ├─ Large codebase with many gaps?
    │   └─ Use phase-based approach:
    │       1. Discovery Scan → Coverage Analysis
    │       2. Prioritize by impact (P1 → P2 → P3)
    │       3. Generate docs incrementally (critical first)
    │       4. Set up maintenance (PR templates, quarterly audits)
    │
    └─ Maintaining existing docs?
        └─ Check for:
            ├─ Outdated docs (code changed, docs didn't) → Update or archive
            ├─ Orphaned docs (references non-existent code) → Remove
            └─ Missing coverage → Add to backlog → Prioritize

Navigation: Discovery & Analysis

Component Discovery

Resource: references/discovery-patterns.md

Language-specific patterns for discovering documentable components:

• .NET/C# codebase (Controllers, Services, DbContexts, Kafka handlers)
• Node.js/TypeScript codebase (Routes, Services, Models, Middleware)
• Python codebase (Views, Models, Tasks, Config)
• Go, Java/Spring, React/Frontend patterns
• Discovery commands (ripgrep, grep, find)
• Cross-reference discovery (Kafka topics, external APIs, webhooks)

Priority Framework

Resource: references/priority-framework.md

Framework for prioritizing documentation efforts:

• Priority 1: External-Facing (public APIs, webhooks, auth) - Must document
• Priority 2: Internal Integration (services, events, database) - Should document
• Priority 3: Developer Reference (config, utilities) - Nice to have
• Prioritization decision tree
• Documentation debt scoring (formula + interpretation)
• Compliance considerations (ISO 27001, GDPR, HIPAA)

Audit Workflows

Resource: references/audit-workflows.md

Systematic workflows for conducting audits:

• Phase 1: Discovery Scan (identify all components)
• Phase 2: Coverage Analysis (compare against existing docs)
• Phase 3: Generate Documentation (use templates)
• Phase 4: Maintain Coverage (PR templates, CI/CD checks)
• Audit types (full, incremental, targeted)
• Audit checklist (pre-audit, during, post-audit)
• Tools and automation

CI/CD Integration

Resource: references/cicd-integration.md

Automated documentation checks and enforcement:

• PR template documentation checklists
• CI/CD coverage gates (GitHub Actions, GitLab CI, Jenkins)
• Pre-commit hooks (Git, Husky)
• Documentation linters (markdownlint, Vale, link checkers)
• API contract validation (Spectral, AsyncAPI CLI)
• Coverage tools (Swagger Coverage, OpenAPI Coverage)
• Automated coverage reports
• Best practices and anti-patterns

Freshness Tracking

Resource: references/freshness-tracking.md

Track documentation staleness and drift from code:

• Freshness metadata standards (last_verified, owner, review_cadence)
• Git-based freshness analysis scripts
• Staleness thresholds by priority (P1: 30 days, P2: 60 days, P3: 90 days)
• CI/CD freshness gates (GitHub Actions, GitLab CI)
• Observability dashboards and metrics
• Automated doc reminder bots

Navigation: Templates

Coverage Report Template

Template: assets/coverage-report-template.md

Structured coverage report with:

• Executive summary (coverage %, key findings, recommendations)
• Coverage by category (API, Service, Data, Events, Infrastructure)
• Gap analysis (P1, P2, P3 with impact/effort)
• Outdated documentation tracking
• Documentation debt score
• Action plan (sprints + ongoing)

Documentation Backlog Template

Template: assets/documentation-backlog-template.md

Backlog tracking with:

• Status summary (In Progress, To Do P1/P2/P3, Blocked, Completed)
• Task organization by priority
• Templates reference (quick links)
• Effort estimates (Low < 2h, Medium 2-8h, High > 8h)
• Review cadence (weekly, bi-weekly, monthly, quarterly)

Output Artifacts

After running an audit, produce these artifacts:

1. Coverage Report - .codex/docs/audit/coverage-report.md

   • Overall coverage percentage
   • Detailed findings by category
   • Gap analysis with priorities
   • Recommendations and next audit date

2. Documentation Backlog - .codex/docs/audit/documentation-backlog.md

   • In Progress items with owners
   • To Do items by priority (P1, P2, P3)
   • Blocked items with resolution path
   • Completed items with dates

3. Generated Documentation - .codex/docs/ (organized by category)

   • API reference (public/private)
   • Event catalog (Kafka/messaging)
   • Database schema (ER diagrams)
   • Background jobs (runbooks)

Integration with Foundation Skills

This skill works closely with:

docs-codebase - Provides templates for:

• api-docs-template.md - REST API documentation
• adr-template.md - Architecture decisions
• readme-template.md - Project overviews
• changelog-template.md - Release history

Workflow:

1. Use qa-docs-coverage to discover gaps
2. Use docs-codebase templates to fill gaps
3. Use qa-docs-coverage CI/CD integration to maintain coverage

Anti-Patterns to Avoid

• Documenting everything at once - Prioritize by impact, document incrementally
• Merging doc drafts without review - Drafts must be validated by owners and runnable in practice
• Ignoring outdated docs - Outdated docs are worse than no docs
• Documentation without ownership - Assign owners for each doc area
• Skipping the audit - Don't assume you know what's documented
• Blocking all PRs - Only block for P1 gaps, warn for P2/P3

Optional: AI / Automation

Do:

• Use AI to draft docs from code and tickets, then require human review and link/command verification.
• Use AI to propose "freshness diffs" and missing doc sections; validate by running the runbook steps.

Avoid:

• Publishing unverified drafts that include incorrect commands, unsafe advice, or hallucinated endpoints.

Success Criteria

Immediate (After Audit):

• Coverage report clearly shows gaps with priorities
• Documentation backlog is actionable and assigned
• Critical gaps (P1) identified with owners

Short-term (1-2 Sprints):

• All P1 gaps documented
• Documentation coverage > 80% for external-facing components
• Documentation backlog actively managed

Long-term (Ongoing):

• Quarterly audits show improving coverage (upward trend)
• PR documentation checklist compliance > 90%
• "How do I" questions in Slack decrease
• Onboarding time for new engineers decreases

Related Skills

• docs-codebase - Templates for writing documentation (README, ADR, API docs, changelog)
• docs-ai-prd - PRD and tech spec templates for new features
• software-code-review - Code review including documentation standards

Usage Notes

For Claude: When auditing a codebase:

1. Start with discovery - Use references/discovery-patterns.md to find components
2. Calculate coverage - Compare discovered components vs existing docs
3. Prioritize gaps - Use references/priority-framework.md to assign P1/P2/P3
4. Follow workflows - Use references/audit-workflows.md for systematic approach
5. Use templates - Reference docs-codebase for documentation structure
6. Set up automation - Use references/cicd-integration.md for ongoing maintenance

Remember: The goal is not 100% coverage, but useful coverage for the target audience. Document what developers, operators, and integrators actually need.