Best Claude skills for documentation in 2026

Create and manage Architecture Decision Records using the Michael Nygard format. Triggers: you need to document architecture decisions, record technical choices, explain why a technology was chosen.

Write human-sounding, SEO-optimized blog posts for skills-hub.ai. Use when: 'write a blog post', 'draft a post', 'update blog', 'blog about', 'write about'. Supports styles: tutorial, deep_dive, opinion, listicle, case_study.

Generate OpenAPI 3.1 documentation from your API codebase. Auto-detects Express, Fastify, NestJS, Django, FastAPI, Flask, Rails, Spring, Go, and more. Triggers: you need API documentation, OpenAPI spec, Swagger docs, endpoint reference, or REST API docs.

Generate project documentation — README files, API docs, and changelogs. Triggers: README, documentation, generate docs, document this project, write README, API docs, changelog.

Generate Mermaid architecture diagrams from your codebase. Produces C4 context and container diagrams, sequence diagrams for key flows, ER diagrams from database schemas, and module dependency graphs. Use when you need architecture diagrams, system diagrams, database ERD, sequence diagrams, dependency visualization, or C4 model diagrams.

Read an unfamiliar codebase and produce a developer onboarding guide — architecture overview, key files, setup steps, common tasks, and gotchas.

Generate an operations runbook from your deployment config, Docker/K8s manifests, CI/CD pipelines, and monitoring setup. Triggers: you need a runbook, ops playbook, deployment guide, incident response plan, or production operations documentation.

Creates and edits Word (.docx), PowerPoint (.pptx), Excel (.xlsx), and PDF files programmatically: detects the available runtime and picks the right library per format (python-docx or docx.js, python-pptx, openpyxl or exceljs, reportlab or pdf-lib).

Generate Excalidraw architecture diagrams (.excalidraw JSON files) from your codebase. Triggers: you need whiteboard-style sketches that read as a thinking artifact rather than a polished spec — ideal for design.

Audit your project's documentation health and identify gaps. Scans for README, changelog, API docs, ADRs, runbooks, onboarding guides, and diagrams. Triggers: you need a documentation audit, want to check doc coverage, find missing documentation, or assess documentation quality.