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7 GitHub Repos Most Claude Users Have Never Heard Of

Reel80 sComment keyword REPOS

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Seven free, open-source repos that make Claude do the whole job. The last one has over 300K stars!

In this video

Commands that start with / go inside Claude Code. The others go in a terminal.

  1. Anthropic Skills

    194K ★Mixed (many Apache-2.0)

    The official skills behind Claude's Word, Excel, PowerPoint and PDF features. Marked by Anthropic as demonstration and educational.

    Install

    /plugin marketplace add anthropics/skills
    /plugin install document-skills@anthropic-agent-skills

    Open on GitHubanthropics/skills

  2. Ponytail

    190K ★MIT

    The "laziest senior dev": seven questions before any code, then the smallest code that works. Its own benchmark: 53% less code, 41% less time.

    Install

    /plugin marketplace add DietrichGebert/ponytail
    /plugin install ponytail@ponytail

    Be careful: Install only from DietrichGebert/ponytail on GitHub or @dietrichgebert/ponytail on npm. The README warns about fake copies.

    Open on GitHubDietrichGebert/ponytail

  3. Impeccable

    109K ★Apache-2.0

    Gives your coding agent design words: bolder, quieter, polish, critique, audit. 24 commands, a 62-rule detector, and a live mode in the browser.

    Install

    npx impeccable install
    /impeccable init

    Be careful: Run the install in your project root. Live mode is for a local checkout only, and its hooks run outside model approval: read the README first.

    Open on GitHubpbakaus/impeccable

  4. Humanizer

    68K ★MIT

    Removes the signs of AI writing, based on Wikipedia's "Signs of AI writing" list. It does not try to get past AI detectors.

    Install

    /plugin marketplace add blader/humanizer
    /plugin install humanizer@humanizer

    Be careful: Needs Claude Code 2.1.142 or newer.

    Open on GitHubblader/humanizer

  5. Last30Days

    67K ★MIT

    Researches the last 30 days on Reddit, X, YouTube, Hacker News, Polymarket and the web, ranked by real upvotes, likes and money.

    Install

    /plugin marketplace add mvanhorn/last30days-skill
    /plugin install last30days

    Open on GitHubmvanhorn/last30days-skill

  6. Diagram Design

    67K ★MIT

    Describe a diagram in plain words and get one self-contained HTML + SVG file. About 45-50 diagram types, matched to your site's colours and fonts.

    Install

    /plugin marketplace add cathrynlavery/diagram-design
    /plugin install diagram-design@diagram-design

    Open on GitHubcathrynlavery/diagram-design

  7. Superpowers

    317K ★MIT

    Claude asks what you are building first, writes a spec in short chunks, makes a plan with red/green tests, then sub agents build and review.

    Install

    /plugin install superpowers@claude-plugins-official

    Open on GitHubobra/superpowers

Good to know

  • Note: Claude Code needs a paid Claude plan; the repos are free and open source. Star counts as of 13 Nov 2026. Install only from the official GitHub pages.

Facts checked on 13 Nov 2026. Star counts, prices and plans change: check the official page before you pay for anything.