Skip to content
appsgit

10 picks · ranked by GitHub stars

Best agent skills for Codex

The best agent skills for Codex are Systematic Debugging, Improve Codebase Architecture and Ponytail; Systematic Debugging leads with 306,774 GitHub stars.

The list covers 728 agent skills in the appsgit catalog, one entry per repository.

Updated · data from GitHub, refreshed daily

Top picks

  1. Rank 1:

    Systematic Debugging

    obra/superpowers

    Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.

    Active · last commit Oct 21, 2026

    Testing & QAShell

    Stands out for the most GitHub stars. Systematic Debugging has 306,774 GitHub stars, has 306,946 installs on skills.sh and runs without an API key.

  2. Rank 2:

    Improve Codebase Architecture

    mattpocock/skills

    Scan a codebase for deepening opportunities, present them as a visual HTML report, then grill through whichever one you pick.

    Active · last commit Oct 27, 2026

    CodingShell

    Stands out for the most installs on skills.sh (1,167,664). Improve Codebase Architecture has 305,150 GitHub stars, has 1,167,664 installs on skills.sh and runs without an API key.

  3. Rank 3:

    Ponytail

    DietrichGebert/ponytail

    Lazy senior dev mode: the smallest change that fully solves the task, and a reply a busy human understands in one read.

    Active · last commit Oct 18, 2026

    Docs & writingJavaScript

    Stands out for running without an API key. Ponytail has 178,476 GitHub stars, has 104,938 installs on skills.sh and runs without an API key.

At a glance

Agent skills for Codex compared

Ranked by GitHub stars (installs on skills.sh break ties), at most one entry per repository so one project cannot fill the list.

Top 10 picks compared, data as of Oct 28, 2026
AppStands out forLicenseGitHub starsLast commitAPI key
Systematic Debuggingthe most GitHub starsMIT306,774Oct 21, 2026Not needed
Improve Codebase Architecturethe most installs on skills.sh (1,167,664)MIT305,150Oct 27, 2026Not needed
Ponytailrunning without an API keyMIT178,476Oct 18, 2026Not needed
Design Systema permissive MIT licenseMIT141,758Oct 26, 2026Not needed
Browser Usebeing published by the vendor itselfMIT119,344Oct 26, 2026Needed
Safe Refactor–Apache-2.0115,623Oct 25, 2026Not needed
Code Review And Quality–MIT111,265Oct 13, 2026Not needed
Computer Use–MIT108,421Oct 28, 2026Not needed
Agent Browser–MIT108,120Oct 28, 2026Not needed
Aster Atelier–Apache-2.0104,489Oct 28, 2026Not needed

Full ranking

All 10 picks, ranked

Ranked by GitHub stars (installs on skills.sh break ties), at most one entry per repository so one project cannot fill the list.

  1. 1

    Systematic Debugging

    Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.

    Stands out for the most GitHub stars. Systematic Debugging has 306,774 GitHub stars, has 306,946 installs on skills.sh and runs without an API key.

  2. 2

    Improve Codebase Architecture

    Scan a codebase for deepening opportunities, present them as a visual HTML report, then grill through whichever one you pick.

    Stands out for the most installs on skills.sh (1,167,664). Improve Codebase Architecture has 305,150 GitHub stars, has 1,167,664 installs on skills.sh and runs without an API key.

  3. 3

    Ponytail

    Lazy senior dev mode: the smallest change that fully solves the task, and a reply a busy human understands in one read.

    Stands out for running without an API key. Ponytail has 178,476 GitHub stars, has 104,938 installs on skills.sh and runs without an API key.

  4. 4

    Design System

    Token architecture, component specifications, and slide generation.

    Stands out for a permissive MIT license. Design System has 141,758 GitHub stars, has 480 installs on skills.sh and runs without an API key.

  5. 5

    Browser Use

    Direct browser control via CDP for web interaction: automation, scraping, testing, screenshots, and site/app work.

    Stands out for being published by the vendor itself. Browser Use has 119,344 GitHub stars, is published by the vendor itself, has 98,125 installs on skills.sh and needs an API key or token.

  6. 6

    Safe Refactor

    Restructure code while preserving behavior.

    Safe Refactor has 115,623 GitHub stars, has 105,479 installs on skills.sh and runs without an API key.

  7. 7

    Code Review And Quality

    Conducts multi-axis code review. Use before merging any change.

    Code Review And Quality has 111,265 GitHub stars, has 72,431 installs on skills.sh and runs without an API key.

  8. 8

    Computer Use

    Drives the GUI of a visible local app window through orca computer: accessibility tree, clicks, typing, menus, dialogs, and screenshots in native apps and external browser windows (Chrome, Edge…

    Computer Use has 108,421 GitHub stars, is published by the vendor itself, has 239,015 installs on skills.sh and runs without an API key.

  9. 9

    Agent Browser

    Drive a real browser to inspect or interact with a web page or app — navigate, take screenshots, read console and network, fill simple forms — for verification tasks, not unattended automation.

    Agent Browser has 108,120 GitHub stars and runs without an API key.

  10. 10

    Aster Atelier

    Use this template when the user wants an artistic creative-studio website with classical imagery, cobalt skies, elegant serif typography and cinematic scrolling.

    Aster Atelier has 104,489 GitHub stars and runs without an API key.

FAQ

Questions and answers

Still curious? Email info@appsgit.com.

Do these agent skills need an API key?

1 of the 10 picks need an API key or token, for example Browser Use; 9 run without one. Each page on appsgit lists the environment variables a agent skill expects.

Which coding agents work with these skills?

Claude Code (all), Codex (all), Cursor (9 of 10) and OpenCode (9 of 10). The client list comes from each project's published compatibility data; appsgit does not guess it.

Are any of these agent skills official?

Yes: Browser Use and Computer Use are published by the vendor themselves.

How is this list ranked?

Ranked by GitHub stars (installs on skills.sh break ties), at most one entry per repository so one project cannot fill the list.

The weekly digest

New self-hosted apps, every week

Fresh releases, rising projects and one deploy guide a week. Join home labbers and engineers who self-host.

One email a week. No spam, unsubscribe anytime.