A curated list of awesome OpenAI Codex / ChatGPT plugins, skills, and resources. The #1 Codex Marketplace. See live plugins at: https://hol.org/plugins/best-codex-plugins
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
Edit, trim, cut, caption, subtitle, reframe, combine, add background music to, or export video, audio, and image files through Cassette. Use this skill whenever the user asks to change, preview, or render a media file in the project — even if they never say "Cassette" or name a tool — for example "trim the intro off…
hashgraph-online/awesome-codex-plugins
Skill Codex
Install Codex themes and Codex skin packs with npx skills. Use this skill when a user wants Codex to find, download, validate, apply, switch, remix, or restore Codex desktop themes such as caishen-readable, caishen-lite, mythic-guardian-noir, global-founder-bright, export-night, or caishen-max. It stages verified…
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
A set of reference adapters for generating AI-agent code in LangChain, EINO, AutoGen, AgentScope, and CrewAI. It provides framework-specific templates, common patterns, API mappings, and project structures, with version dates for the references.
hashgraph-online/awesome-codex-plugins
Skill Codex
An interactive workshop for designing and building AI agents, software that can use instructions and tools to complete tasks. It guides the work from requirements and architecture through code generation and verification, and supports several agent frameworks.
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
Design and optimize AI agent action spaces, tool definitions, and observation formatting for higher completion rates.
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
A reference catalogue of six common AI-agent designs, including agents that reason and act, retrieve documents, call tools, coordinate several agents, or work autonomously. It compares their structures, data flow, and suitable uses without tying them to one framework.
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
Operate as an agentic engineer using eval-first execution, decomposition, and cost-aware model routing.
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
Engineering operating model for teams where AI agents generate a large share of implementation output.
hashgraph-online/awesome-codex-plugins
Skill Codex needs its repo
Regression testing strategies for AI-assisted development. Sandbox-mode API testing without database dependencies, automated bug-check workflows, and patterns to catch AI blind spots where the same model writes and reviews code.
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
Clean Architecture patterns for Android and Kotlin Multiplatform projects — module structure, dependency rules, UseCases, Repositories, and data layer patterns.
hashgraph-online/awesome-codex-plugins
Skill Codex
A guide for defining and reviewing an API contract: the agreed shape of requests, responses, authentication, errors, and compatibility rules between services. It can also guide OpenAPI checks and contract testing, which verifies that systems follow those agreements.
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
REST API design patterns including resource naming, status codes, pagination, filtering, error responses, versioning, and rate limiting for production APIs.
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
Capture architectural decisions made during Claude Code sessions as structured ADRs. Auto-detects decision moments, records context, alternatives considered, and rationale. Maintains an ADR log so future developers understand why the codebase is shaped the way it is.
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
Write articles, guides, blog posts, tutorials, newsletter issues, and other long-form content in a distinctive voice derived from supplied examples or brand guidance. Use when the user wants polished written content longer than a paragraph, especially when voice consistency, structure, and credibility matter.
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
Backend architecture patterns, API design, database optimization, and server-side best practices for Node.js, Express, and Next.js API routes.
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
Use this skill to measure performance baselines, detect regressions before/after PRs, and compare stack alternatives.
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
Turn a one-line objective into a step-by-step construction plan for multi-session, multi-agent engineering projects. Each step has a self-contained context brief so a fresh agent can execute it cold. Includes adversarial review gate, dependency graph, parallel step detection, anti-pattern catalog, and plan mutation…
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
A guided brainstorming process that explores several solutions before choosing one. It compares options by user experience, engineering effort, business value, and risk, then records the decision and next steps.
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
Build a source-derived writing style profile from real posts, essays, launch notes, docs, or site copy, then reuse that profile across content, outreach, and social workflows. Use when the user wants voice consistency without generic AI writing tropes.
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
A browser-based quality check for deployed web pages and user flows. It uses browser automation to test rendering, navigation, forms, interactions, responsive behaviour, and accessibility-related issues.
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
Codified expertise for managing carrier portfolios, negotiating freight rates, tracking carrier performance, allocating freight, and maintaining strategic carrier relationships. Informed by transportation managers with 15+ years experience. Includes scorecarding frameworks, RFP processes, market intelligence, and…
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
Anthropic Claude API patterns for Python and TypeScript. Covers Messages API, streaming, tool use, vision, extended thinking, batches, prompt caching, and Claude Agent SDK. Use when building applications with the Claude API or Anthropic SDKs.
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
Orchestrate multi-agent coding tasks via Claude DevFleet — plan projects, dispatch parallel agents in isolated worktrees, monitor progress, and read structured reports.
hashgraph-online/awesome-codex-plugins
Skill Claude CodeCodex
ClickHouse database patterns, query optimization, analytics, and data engineering best practices for high-performance analytical workloads.
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: