Everything for Codex

Skills, prompts, AGENTS.md files and MCP servers that Codex reads. Skills are shared with Claude Code; the rest is Codex-native. 281,926 indexed, measured the same four ways as everything else here.

napkin

1897

blader/napkin

Skill Claude CodeCodex

Maintain a per-repo napkin as a continuously curated runbook (not a session log). Activates EVERY session. Read and curate it before work, keep only recurring high-value guidance, organize by priority-sorted categories, and cap each category at top 10 items. The napkin lives at .claude/napkin.md.

not rated 642 8mo ago A 75 tokens original MIT

color-expert

1898

meodai/skill.color-expert

Skill Claude CodeCodex

Use when working with color naming, color theory, color spaces, color definitions, or any task involving color knowledge - palettes, ramps, gradients, conversions, accessibility, perceptual matching, pigment mixing, print-vs-screen color, CSS color syntax, or historical color terminology. Use this skill whenever the…

not rated 642 +11 changed 18d ago B 92 tokens CC-BY-4.0

lemma-user

1899

lemma-work/lemma-platform

Skill Codex

Operate an existing Lemma pod from the CLI as a human or agent: inspect resources, query tables and records under RLS, search and read pod files (converted markdown, page images), run functions and workflows, submit waiting workflow forms, chat with pod agents, message pod members, and execute third-party connector…

not rated 642 +5 changed today A SkillSpector: warn 81 tokens AGPL-3.0

foundry-testing

1900

PaulRBerg/foundry-template

Skill Codex

Write and debug Foundry tests and Solidity scripts. Use when writing unit, fuzz, fork, or invariant tests, writing bulloak BTT .tree specs (Branching Tree Technique), using cheatcodes, benchmarking gas, measuring coverage, writing deploy scripts, or working in tests/ or script/.

not rated 642 9d ago A 64 tokens original MIT

z-excel-editor

1901

tjxj/z-skills

Skill Claude CodeCodex

Use this skill any time a spreadsheet file is the primary input or output. This means any task where the user wants to: open, read, edit, or fix an existing .xlsx, .xlsm, .csv, or .tsv file (e.g., adding columns, computing formulas, formatting, charting, cleaning messy data); create a new spreadsheet from scratch or…

not rated 641 +40 2d ago A 204 tokens

code-review

1902

sandbaseai/sandbase-harness

Skill Claude CodeCodex

Reviews a supplied code path or diff for correctness, security, maintainability, and style without executing or modifying it.

not rated 640 +2 today A SkillSpector: pass 25 tokens original Apache-2.0

lynkr

1904

Fast-Editor/Lynkr

Skill Claude CodeCodex

Universal LLM gateway with intelligent routing, Graphify code intelligence, Distill compression, routing telemetry, Code Mode, and 12+ provider support. 60-80% cost reduction for Claude Code, Cursor, and Codex.

not rated 639 3d ago A SkillSpector: pass 50 tokens original Apache-2.0

ehmo/platform-design-skills

Skill Claude CodeCodex

Material Design 3 and Android platform guidelines. Use when building Android apps with Jetpack Compose or XML layouts, implementing Material You, navigation, or accessibility. Triggers on tasks involving Android UI, Compose components, dynamic color, or Material Design compliance.

not rated 639 +1 7mo ago A 55 tokens original MIT

skills-creator

1906

AIDotNet/OpenCowork

Skill Claude CodeCodex

Create, install, validate, update, and diagnose NextCoWork Skills. Use when authoring a SKILL.md package, installing a global or workspace Skill, packaging a Skill ZIP, or fixing Skill discovery, activation, or diagnostics.

not rated 639 1mo ago A 51 tokens

agent-prompt-audit

1907

avibe-bot/avibe

Skill Codex

Audit and improve the prompt surface of Avibe Agents across backends (Claude, Codex/GPT, OpenCode) — global and project rules, Agent system prompts, Skills, delegation briefs, and Task and Watch messages — using real run evidence. Use when an Agent misbehaves (stalls, over-asks, over-reaches, ignores or over-applies a…

not rated 638 +1 changed 6d ago A 105 tokens original MIT

investment-masters

1908

AlphaGBM/investment-masters

Skill Claude CodeCodex

Investment master methodology distillation. Extract core principles from 15 top fund managers (Buffett, Dalio, Simons, Soros, Marks, Lynch, Druckenmiller, etc.), read dated public filings when supplied or retrieved, compare philosophies, and map insights to your own strategy. Use when: learning investment frameworks…

not rated 637 +1 changed 1mo ago A 140 tokens original MIT

vibe-check

1909

TexasBedouin/vibe-check

Skill Claude CodeCodex

Turn a complete beginner's app idea into a buildable plan, then keep them oriented while they build. Use it whenever someone who has never coded wants to build or "vibe code" an app, has an idea but no idea where to start, or wants it turned into a plan, MVP scope, tech stack, user flows, or blueprint. It has three…

not rated 637 +3 3mo ago A 292 tokens original MIT

pdf

1910

lasywolf/Learn-OpenClaw

Skill Claude CodeCodex

Use this skill whenever the user wants to do anything with PDF files. This includes reading or extracting text/tables from PDFs, combining or merging multiple PDFs into one, splitting PDFs apart, rotating pages, adding watermarks, creating new PDFs, filling PDF forms, encrypting/decrypting PDFs, extracting images, and…

not rated 637 +2 1mo ago A 92 tokens copy · 100% MIT

klaw.sh

1911

klawsh/klaw.sh

Skill Claude CodeCodex

You are running inside klaw, an open-source AI agent orchestration platform. This document explains your capabilities and how to use them effectively.

not rated 636 7mo ago A 0 tokens

bb-sites

1912

epiral/bb-sites

Skill Claude CodeCodex

A development guide for bb-sites, written partly in Chinese, with instructions for analysing and building sites around an API. API reverse engineering means observing how an existing service communicates so its requests can be understood.

not rated 636 2mo ago A 0 tokens

ai-review-skill

1913

NeuroDong/Ai-Review

Skill Claude CodeCodex

A paper-reviewing guide for LaTeX, PDF, and Word research manuscripts. It produces structured comments about a paper’s strengths, weaknesses, and possible improvements, without giving a score or accept/reject decision.

not rated 636 2mo ago A SkillSpector: pass 91 tokens original MIT

caption-writer-sms

1914

blacktwist/social-media-skills

Skill Claude CodeCodex

When the user wants to write a caption for a visual-first social media post on Facebook, Instagram, TikTok, Pinterest, or YouTube. Also use when the user mentions 'caption,' 'Instagram caption,' 'IG caption,' 'Reels caption,' 'TikTok caption,' 'Pinterest description,' 'Pinterest pin caption,' 'Facebook caption,'…

not rated 636 +17 4d ago A Socket: passSnyk: passSkillSpector: pass 168 tokens original MIT

loop

1915

breezewish/CodexPotter

Skill Codex

Use only when user explicitly invokes $loop.

not rated 635 +1 changed 2mo ago A SkillSpector: warn 11 tokens original Apache-2.0

vendo-setup

1916

runvendo/vendo

Skill Claude CodeCodex

Install and configure Vendo (the embedded product agent) in a host repo. Use when asked to add Vendo to an app, run vendo init/doctor/sync, wire the Vendo handler or VendoProvider, or debug a Vendo install.

not rated 635 +1 26d ago A SkillSpector: warn 56 tokens original Apache-2.0

haskaomni/serenity-skill

Skill Codex

Use a Bayesian intrinsic-growth valuation model to evaluate whether a company's market value sufficiently, excessively, or insufficiently prices its real 3-5 year growth. Use when the user asks for Bayesian valuation, intrinsic growth rate, implied growth, growth-hypothesis probabilities, FOMO versus fundamentals, or…

not rated 634 +1 3mo ago A SkillSpector: pass 91 tokens original MIT

fable-advisor-python3

1918

Cjbuilds/Codex-Orchestration

MCP server Claude CodeCodexCursor +2

One of 3 in .mcp.json

MCP server "fable-advisor-python3" as configured in Cjbuilds/Codex-Orchestration. Runs skills/codex-orchestration/scripts/fable_advisor_mcp.py with python3.

not rated 634 +1 1mo ago A tokens not measured original MIT

launch-video

1919

modem-dev/sideshow

Skill Claude CodeCodex needs its repo

Produces sideshow release/feature videos by driving the real viewer in a recording Chromium against a live server — 1920x1080 stage with window chrome, captions, and title cards, encoded with ffmpeg. Use for release roundups, single-feature demos, PR walkthroughs, and social announcements.

not rated 634 +4 2mo ago A SkillSpector: warn 64 tokens original MIT

marmot

1920

marmotdata/marmot

MCP server Claude CodeCodexCursor +2

Open-source data catalog. Search assets, explore lineage, and find ownership. Remote server at {marmot_host}.

not rated 634 +5 3d ago A tokens not measured original MIT

At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: