1
The skills behind Claude's ability to create and edit Word, PDF, PowerPoint and Excel files
★ 179k · +1.2k this week · Proprietary (source-available) · updated 2026-09-29
8.5/10
What it does These are the four skills Anthropic uses behind Claude's ability to create and edit office files: docx for Word, pdf for PDF, pptx for PowerPoint and xlsx for Excel. Each skill tells the agent which libraries and command-line tools to use for each task, lists common mistakes, and requires a check of the output before the file… Read more →
Pros
- Production-grade document handling
- Covers the four main office formats
Cons
- Proprietary licence: use within Anthropic products, no redistribution
- Needs Python, Node, pandoc, LibreOffice and Poppler installed
Pricing: Free · documents office
2
Official-author skills for Obsidian Markdown, Bases, JSON Canvas and the Obsidian CLI
★ 49k · +218 this week · MIT · updated 2026-09-15
8.1/10
What it does Obsidian Skills is a small set of Agent Skills from Steph Ango (kepano), CEO of Obsidian. It teaches coding agents to work correctly with Obsidian's file formats and command-line tools. Without it, an agent editing a vault tends to write plain Markdown and can break wikilinks, callouts, properties or the JSON structure of canvases and bases. With… Read more →
Pros
- Maintained by Obsidian's CEO, accurate to the file formats
- Obsidian CLI skill supports plugin and theme debugging
- Small, focused and spec-compliant
Cons
- Only useful if you work with Obsidian vaults
- obsidian-cli can run JavaScript in your open app and overwrite notes
Pricing: Open source · obsidian markdown json-canvas cli plugin-development
3
Convert a technical book or doc folder into an on-demand Agent Skill with chapter files
★ 33k · +903 this week · MIT · updated 2026-09-29
7.7/10
What it does book-to-skill turns a technical book, or any folder of long documents, into an Agent Skill your coding agent can consult while you work. You run /book-to-skill ./my-book.pdf. A Python extractor pulls clean text and chapter structure from the file, and your agent then follows the skill's instructions to write a structured skill from it. The result is… Read more →
Pros
- Chapter files load only when asked, keeping context small
- Local extraction for PDF, EPUB, DOCX, HTML and more
- Tests, validator and token-cost tooling included
Cons
- Output quality depends on the source's text layer and optional extractors
- Skills of copyrighted books must stay private
Pricing: Open source · document-processing pdf epub knowledge-base context-engineering
4
Write one .mda source, compile to SKILL.md, AGENTS.md and CLAUDE.md with integrity digests
★ 619 · +2 this week · Apache-2.0 · updated 2026-05-26
6.5/10
What it does MDA (Markdown for Agent) is an open specification and reference CLI for writing agent-facing documents once and compiling them into the several .md shapes different runtimes expect. Today a skill often ships four times, as SKILL.md, AGENTS.md, MCP-SERVER.md and CLAUDE.md, with the same body and four different frontmatter shapes that quietly drift apart. With MDA you write… Read more →
Pros
- One source compiles into every major runtime's .md shape, ending copy drift
- Carries content digest and Sigstore signatures for tamper-evidence
- Honest about what v1.0 does and does not yet ship
Cons
- Bundled verifier, resolver and registry are still being built
- Does not target Cursor MDC, Windsurf rules or *.instructions.md yet
Pricing: Open source · markdown skill-authoring agents-md integrity signatures