claude-codex-settings

# Add marketplace (one time)
claude plugin marketplace add fcakyon/claude-codex-settings

# Install any plugin by name
claude plugin install fable-advisor@claude-settings

In Claude Code desktop, select + beside the prompt, then Plugins and Add plugin.

# Add marketplace (one time)
codex plugin marketplace add fcakyon/claude-codex-settings

# Install any plugin by name
codex plugin add simplify@claude-settings

In the Codex desktop app, open Plugins, find the plugin, and select Install.

git clone https://github.com/fcakyon/claude-codex-settings.git
cd claude-codex-settings
uv run .github/scripts/antigravity.py install simplify

Requires Antigravity CLI and uv. The installer packages skills and MCP servers for Antigravity, keeps long instructions in full, and installs them with agy plugin install. Claude-specific hooks, agents, commands, and output styles stay with their original tools. Add more plugin names to install several at once.

# Add marketplace (one time)
cursor-agent plugin marketplace add https://github.com/fcakyon/claude-codex-settings

# Start the interactive CLI
cursor-agent

Enter /plugin, open the marketplace, and install the plugin at user or project scope. In the Cursor app, open Customize and select Install.

Run /simplify to review your staged or committed diff across four angles (reuse, simplification, efficiency, altitude) with parallel agents, then apply the cleanups. It reviews changed-code quality, not correctness bugs. It brings Claude Code’s built-in /simplify to Codex, Cursor, and Antigravity, which don’t ship it natively, so all three get the same review and apply flow.

Skills:

• simplify - review the changed diff across four angles and apply the fixes

Hooks:

• guard.py - Require a completed /simplify run before each Claude Code or Codex commit, unless you explicitly ask to skip it for one commit

Before a Write or Edit saves, humanize scans the new text and blocks whatever reads like a machine wrote it, each hit paired with a plain-word swap. It reads Markdown files whole and checks comments and docstrings in code files while skipping source code and recognized code-shaped references:

• 3 marks: the em-dash, section sign, and stray semicolon (the en-dash stays)
• 53 stock words like leverage, seamlessly, vibrant, game-changing, each mapped to a plain swap
• 16 openers and cliches like in conclusion, a testament to, aims to bridge
• 10 pile-up words like crucial or significant, flagged at 3+ uses in one write

The hook runs on Claude Code and Codex; Antigravity receives the writing skill. Unlike a markdown rule the model can ignore, the hook checks every Write or Edit and blocks each match until it is replaced. The word list draws on Wikipedia’s “Signs of AI writing”.

Skills (ZIP for claude.ai, ChatGPT, Claude Code, Cursor, Codex, VS Code):

Skill	Description	ZIP
humanize	Avoid common AI writing patterns with examples

Hooks:

• humanize.py - blocks matched marks, buzzwords, and cliches before a Write or Edit lands

Ask a Fable 5.1 reviewer to challenge a plan or conclusion before you commit. Claude Code uses the native plugin agent, while Codex, Cursor, and Antigravity call the same model through an authenticated Claude Code CLI with claude -p --model claude-fable-5-1.

Agents:

• fable-advisor - Native Claude Code reviewer with recent conversation context

Skills:

• fable-advisor - Routes Claude Code to its native agent and other tools to claude -p

Ask GPT-6 Astra to challenge a plan before you build it, the cross-model check the built-in advisor cannot give you. Claude Code attaches the recent conversation, so “ask the codex advisor” is enough. Codex, Cursor, and Antigravity reach the same reviewer. Needs the Codex CLI signed in.

Agents:

• codex-advisor - Sends the recent conversation to GPT-6 Astra and returns the verdict verbatim

Skills:

• codex-advisor - Routes Claude Code to its native agent and other tools to codex exec

Cuts filler and keeps output token use down with the answer or next step first, one-action-per-step lists, concrete time estimates, a single under-two-minute next action, and short teaching notes while coding. Claude Code applies the output style automatically. Codex, Cursor, and Antigravity CLI expose the same instructions as an adhd-output-style skill because they do not support plugin output styles.

Output styles:

• ADHD Explanatory - Low-token ADHD formatting plus educational Insight blocks while coding

Skills (ZIP for claude.ai, Claude Code, Cursor, Codex, VS Code):

Skill	Description	ZIP
adhd-output-style	Apply the same reply format in Codex, Cursor, and Antigravity CLI

When Claude Code auto-summarizes a long session, the default summary routinely drops the highest-signal facts. This plugin tells the summarizer to keep them:

• File paths under investigation so the next turn doesn’t re-discover where you were
• Confirmed root causes so you don’t re-debug what’s already solved
• Open questions, metrics, and IDs that prose summaries usually round away
• Findings from expensive subagent runs that took minutes to gather

Runs on every /compact (manual) and every auto compaction. Claude Code only; Codex, Cursor, and Antigravity CLI don’t yet expose a comparable summary hook.

Hooks:

• precompact_priorities.sh - Priority-preservation instructions for the compaction summarizer

Adds the two missing pieces Claude Code’s telemetry needs to power a usage dashboard:

• Sticky session ID per project: resumed conversations stay one session, not dozens
• Categorized rejection reasons (profanity, wrong target, scope drift, retry, and more): chart why Claude pushes back

Per-device data is already in Claude Code’s built-in OpenTelemetry stream. Pairs naturally with openobserve-skills for the dashboard side.

Hooks:

• session_start_chat_id.py - SessionStart hook that emits a sticky per-project chat_id
• user_prompt_reject_feedback.py - UserPromptSubmit hook that categorizes tool-rejection reasons

Skills CLI

npx skills add https://github.com/fcakyon/claude-codex-settings/tree/main/plugins/anthropic-office-skills --skill '*'

Official office document skills from anthropics/skills.

Skill	Description	Install
pdf	PDF processing (read, merge, split, create, OCR, forms)
pptx	PowerPoint presentation building and editing
xlsx	Excel spreadsheet processing with formulas
docx	Word document creation and editing

Skills CLI

npx skills add https://github.com/fcakyon/claude-codex-settings/tree/main/plugins/openai-office-skills --skill '*'

Office document skills for creating and editing PDFs, Word documents, slide decks, and spreadsheets.

Skill	Description	Install
pdf	PDF generation and extraction with visual review
slides	Slide deck creation with PptxGenJS
spreadsheet	Spreadsheet processing with formulas and formatting
doc	Word document creation and editing

Python coding guidelines grounded in authoritative sources: PEP 8, PEP 20 (Zen of Python), Google Python Style Guide, and Brett Slatkin’s “Effective Python” (3rd ed.). Covers code integration, idiomatic patterns, YAGNI anti-abstraction rules, Google-style docstrings, and 18 before/after code examples.

Skills (ZIP for claude.ai, Claude Code, Cursor, Codex, VS Code):

Skill	Description	ZIP
python-guidelines	Core rules, self-tests, and reference index

Reference files:

• zen-of-python.md - Full PEP 20 with annotations
• google-style-guide.md - Curated sections with source URLs
• idiomatic-patterns.md - 18 patterns with before/after code
• effective-python-tips.md - Key tips from 3rd edition

Skills CLI

npx skills add https://github.com/fcakyon/claude-codex-settings/tree/main/plugins/react-skills --skill '*'

React and frontend best practices from vercel-labs/agent-skills.

Skills (ZIP for claude.ai, Claude Code, Cursor, Codex, VS Code):

Skill	Description	ZIP
composition-patterns	React composition patterns: compound components, render props, context
react-best-practices	64 React/Next.js performance rules from Vercel Engineering
react-native-skills	35+ React Native/Expo rules for performance and animations
react-view-transitions	View Transition API for page/route animations
web-design-guidelines	UI review against 16 web interface guideline categories

Skills CLI

npx skills add https://github.com/fcakyon/claude-codex-settings/tree/main/plugins/agent-browser --skill '*'

Browser automation via CLI instead of MCP. 93% less context usage than Playwright MCP by using snapshot + element refs instead of full DOM tree dumps. From vercel-labs/agent-browser.

Skills (ZIP for claude.ai, Claude Code, Cursor, Codex, VS Code):

Skill	Description	ZIP
agent-browser	Browser automation: navigation, forms, clicking, screenshots, auth, sessions
electron	Automate Electron desktop apps (VS Code, Slack, Discord, Figma, Notion)
derive-client	Build a direct API client from a site’s recorded browser traffic
dogfood	Explore a web app to find bugs and UX issues
webmcp-gen	Expose a page’s workflows as WebMCP tools
ui-regression	Verify actions, recovery, locales, accessibility, and real integrations

The locally maintained ui-regression skill checks known workflows on local, staging, and deployed UIs, including browser extensions. Use dogfood for exploratory bug discovery.

CLI Tool: agent-browser - install via npm i -g agent-browser && agent-browser install

Skills CLI

npx skills add https://github.com/fcakyon/claude-codex-settings/tree/main/plugins/frontend-design-skills --skill '*'

Frontend design, testing, and writing skills from anthropics/claude-plugins-official, openai/plugins, and vercel-labs/writing-guidelines.

Skill	Description	Install
openai-frontend-design	Composition-first design: restrained layout, image-led hierarchy, tasteful motion
frontend-testing-debugging	Test rendered apps, debug interactions, and check responsive layouts
anthropic-frontend-design	Bold aesthetic direction, distinctive typography, anti-generic AI aesthetics
writing-guidelines	Review interface copy and text for clear, consistent writing

Pairs naturally with reusable-app-components.

Skills CLI

npx skills add https://github.com/fcakyon/claude-codex-settings/tree/main/plugins/mongodb-skills --skill '*'

Official MongoDB agent skills for schema design, queries, indexing, Atlas Search, and connections. From mongodb/agent-skills.

Skills (ZIP for claude.ai, Claude Code, Cursor, Codex, VS Code):

Skill	Description	ZIP
mongodb-atlas-stream-processing	Atlas stream processing patterns
mongodb-connection	Connection management
mongodb-mcp-setup	MCP server setup
mongodb-natural-language-querying	Natural language to queries
mongodb-query-optimizer	Query performance tuning
mongodb-schema-design	Schema design patterns
mongodb-search-and-ai	Atlas Search and AI integration

Skills CLI

npx skills add https://github.com/fcakyon/claude-codex-settings/tree/main/plugins/supabase-skills --skill '*'

Supabase skills covering Postgres query/schema best practices from supabase/agent-skills, JavaScript SDK usage from supabase/supabase-js, and CLI workflows from supabase/cli.

Skills (ZIP for claude.ai, Claude Code, Cursor, Codex, VS Code):

Skill	Description	ZIP
supabase-postgres-best-practices	Postgres performance and schema design across 8 categories
supabase-js	JavaScript SDK for auth, database, storage, realtime, edge functions
supabase-cli	CLI for local dev, migrations, edge functions, project management
supabase	Supabase security, RLS, CLI, and schema change workflow

Skills CLI

npx skills add https://github.com/fcakyon/claude-codex-settings/tree/main/plugins/stripe-skills --skill '*'

Official Stripe agent skills for payment integration: API selection, Connect platform setup, billing/subscriptions, Treasury, and SDK upgrades. From stripe/ai.

Skills (ZIP for claude.ai, Claude Code, Cursor, Codex, VS Code):

Skill	Description	ZIP
stripe-best-practices	Payments, billing, Connect, Treasury integration best practices
stripe-projects	Stripe Projects CLI setup and stack provisioning
upgrade-stripe	Stripe API version and SDK upgrade guide
connect-recommend	Choose a Stripe Connect setup for marketplaces and platforms
connect-required-verification-information	Connected account verification and KYC requirements
metronome	Usage-based billing with Metronome
stripe-apps	Build and review Stripe Apps
stripe-docs	Look up Stripe docs and API reference

Skills CLI

npx skills add https://github.com/fcakyon/claude-codex-settings/tree/main/plugins/polar-skills --skill '*'

Official Polar agent skills for billing system, Stripe integration, subscription lifecycle, and local dev with Docker. From polarsource/polar.

Skills (ZIP for claude.ai, Claude Code, Cursor, Codex, VS Code):

Skill	Description	ZIP
polar-billing	Polar billing system, Stripe integration, subscriptions, benefit provisioning
polar-local-environment	Polar local development environment with Docker

Skills CLI

npx skills add https://github.com/fcakyon/claude-codex-settings/tree/main/plugins/livekit-skills --skill '*'

Voice AI agent development with the LiveKit Agents SDK, from design and live testing to simulations and production. Works with LiveKit Cloud or a self-hosted server, and looks up current docs with the lk CLI when no docs server is connected. Based on livekit/agent-skills, patched so the Cloud-only parts also cover self-hosting.

Skills (ZIP for claude.ai, Claude Code, Cursor, Codex, VS Code):

Skill	Description	ZIP
building-livekit-agents	Structure voice agents: latency, context size, handoffs and tasks
debugging-livekit-agents	Drive a local conversation with the agent and read its tool calls
operating-livekit-agents	Deploy, roll back, and keep a live agent fast and stable
reading-livekit-docs	Look up current LiveKit APIs, CLI flags, and changelogs
running-livekit-simulations	Run whole-conversation simulations before shipping
testing-livekit-agents	Write turn-level agent tests with pytest or Vitest
writing-livekit-scenarios	Write and maintain the scenarios simulations run

Skills CLI

npx skills add https://github.com/fcakyon/claude-codex-settings/tree/main/plugins/cloudflare-skills --skill '*'

Choose the Cloudflare services your project needs, then load the relevant specialist skill. From cloudflare/skills.

• Includes Workers, Wrangler, Durable Objects, Agents SDK, Sandbox, and Turnstile guidance.
• Covers Next.js deployment, email, Zero Trust, migrations, and web performance.
• Keeps detailed references inside each skill so they are read only when needed.

Skills (ZIP for claude.ai, Claude Code, Cursor, Codex, VS Code):

Skill	Description	ZIP
cloudflare-deploy	Cloudflare platform: compute, storage, AI, networking, security
agents-sdk	Build applications with the Agents SDK
basin	Stream, catalog, and query analytics data in R2
cloudflare-email-service	Configure email sending and routing
cloudflare-one	Configure Zero Trust and SASE
cloudflare-one-migrations	Plan migrations to Cloudflare One
durable-objects	Build persistent state and coordination
k2	Build durable logs with K2 Streams
nextjs-on-cloudflare	Deploy Next.js with vinext
sandbox-migrate-to-next	Migrate Sandbox stable to preview
sandbox-next	Build with the Sandbox preview SDK
sandbox-stable	Maintain stable Sandbox applications
turnstile-spin	Set up and verify Turnstile
web-perf	Audit loading and interaction performance
workers-best-practices	Write and review production Workers
cf-cli	Build and deploy with the Cloudflare CLI
gateway-workers	Transform Gateway HTTP traffic with Workers
workers-profiling	Profile Worker CPU usage and find hotspots
wrangler	Configure and operate the Wrangler CLI

Skills CLI

npx skills add https://github.com/fcakyon/claude-codex-settings/tree/main/plugins/web-performance-skills --skill '*'

Audit web page performance using Chrome DevTools MCP. Measures Core Web Vitals (FCP, LCP, TBT, CLS, Speed Index), identifies render-blocking resources, network dependency chains, layout shifts, caching issues, and accessibility gaps. From cloudflare/skills.

Bundles the chrome-devtools MCP server (no API key needed).

Skills (ZIP for claude.ai, Claude Code, Cursor, Codex, VS Code):

Skill	Description	ZIP
web-performance-optimization	Core Web Vitals, Lighthouse, render-blocking, accessibility audits