Skill Claude CodeCodex
Guides creating, editing, reviewing, and debugging Agent Skills and SKILL.md directories. Use when writing a new skill, improving or reviewing an existing skill, fixing a skill description or frontmatter, structuring references, scripts, assets or evals, packaging a skill, or diagnosing a skill that does not trigger…
Skill Claude CodeCodex
Designs and critiques games, mechanics, encounters, progression, game feel and social play. Use when inventing a game or playable sequence, adapting reference games, improving shallow or boring play, interpreting playtest feedback, or deciding how rules and presentation create an intended player experience. Covers…
Skill Claude CodeCodex
Plays running games to verify connected progression, investigate control, camera and collision jank, and confirm repairs. Use when asked to playtest a build, check whether a game can be completed, reproduce a gameplay defect, or test a fix through actual play. The workflow targets browser execution; other engines need…
Skill Claude CodeCodex
Clips local videos or yt-dlp-supported URLs by spoken quote or timestamps, with word-timed burned captions. Use when the user asks to clip, cut, or extract the part where someone says specific words, make a short excerpt, or subtitle that excerpt. Not for recording a browser flow, making a video thumbnail, or general…
Skill Claude CodeCodex
Look at real production websites before designing one. Searches a curated archive of 832 captured sites - screenshots, palettes, fonts, extracted design systems, reference components - filters it by style, vibe, macrostructure, colour, page type and industry, and downloads the screenshots so you can actually see them.…
Skill Claude Code
Explore an idea or experience through open questions that help the user notice and articulate what matters. Use when the user asks for curious cat, asks to be interviewed, or wants help exploring their thinking without rushing to a decision.
Skill Claude CodeCodex
Shapes explanations of technical changes so an audience can review a proposal or decide whether to try it. Use when creating a PR review video, explaining an architecture proposal to colleagues, or presenting experiment results for a decision. Not for performing the code review, writing a routine PR description, or…
Skill Claude CodeCodex
Designs and builds application screens and task flows. Use when creating or improving a working user interface and deciding its screen structure, navigation, collection controls, repeated entry, progress or recovery. Covers review queues, editors, import screens and multi-step forms. Not for marketing pages, research…
Skill Claude CodeCodex
Generates and edits raster images with gpt-image-2 on the ChatGPT subscription Codex is signed in with, so no OPENAIAPIKEY is needed. Use when an agent other than Codex (Claude Code, pi, opencode) is asked to generate, create, draw, render or edit an image: a photo, illustration, hero or banner, sprite, texture…
Skill Claude Code
Gets an adversarial, read-only review of a change or plan from a fresh headless agent (by default the other one: Codex when you are Claude, Claude when you are Codex) via the xreview CLI, then triages every finding against the code and reports. Use when the user asks for a second opinion, a cross-model or adversarial…
Skill Claude CodeCodex
Audit a repository for agent readiness: can a coding agent (Claude Code, Codex, Cursor) change it and verify its own work without a human. Produces a repeatable report with a gated level, a flat score and gaps routed to the skills that fix them. Use when asked how agent-ready, AI-ready or autonomous-ready a repo is…
Skill Claude CodeCodex
Guides using formal methods and judging what a verification result actually establishes: model checking designs (TLA+, PlusCal, Quint, P, Alloy) and proving code or theorems (Lean 4, Dafny, Verus, Kani, SPARK, Bend 2). Use when writing or running a TLA+ spec or TLC model, proving something in Lean, adding Dafny or…
Skill Claude CodeCodex
Makes short narrated animated films (30-120s) as one self-contained HTML canvas page plus a rendered MP4: script, AI voices, music, sound effects, illustrated characters from photos, lip-sync, word-timed gags, render and review. Use when asked for an animation, animated short, cartoon, explainer or funny video about…
Skill Claude CodeCodex
Builds, fixes and verifies Progressive Web Apps: the manifest and what each engine requires to install, service worker caching and updates for users who already installed, offline fallback, client-side push, and Play Store wrappers (TWA). Use when the user says make it a PWA, installable, add to home screen, install…
Skill Claude CodeCodex
Builds, migrates, secures and tests remote MCP servers hosted on Cloudflare Workers, using the Agents SDK stateless handler (createMcpHandler from agents/mcp/server) with MCP TypeScript SDK v2 so one /mcp endpoint serves both 2025-era and 2026-07-28 clients. Use when the user wants to create, deploy, debug or harden…
Skill Claude CodeCodex
Writes, rewrites and reviews a project's README.md so it is short, visual and reads as written by a person: one picture, a one-sentence pitch, the first command near the top, and reference detail moved into docs. Use when creating a README for a repo, CLI, library or package, making an existing README shorter or…
Skill Claude CodeCodex
Edit hex.config.ts, not .hex-sdk. Config and installed dependencies execute with the user's normal permissions; use only trusted packages and avoid network, filesystem, environment, or subprocess access unless the requested command requires it. Run bun run check after editing.
Skill Claude CodeCodex
Chooses how a published Claude artifact and the people using it exchange information with a Claude session, and builds the matching page. Use when an artifact is meant for other people to act on: status or progress pages, dashboards, review or playtest feedback, votes, triage, sign-offs, a runbook or spec doc…
Skill Claude CodeCodex needs its repo
Gets a website ranked in Google and cited or recommended by AI answer engines - ChatGPT search, Perplexity, Google AI Overviews and AI Mode, Gemini, Copilot, Claude. Use when auditing a live site or a Next.js, React or single-page-app codebase for SEO; adding meta tags, canonicals, sitemap, robots.txt or schema…
Skill Claude CodeCodex
Runs the dotfiles system update under agent supervision. Use when the user wants to run up supervised, monitor updates, update everything and fix failures, keep going until up works, or continue an UPDATE INCOMPLETE run. Not for updates in an unrelated project or upgrading macOS itself.
Skill Claude CodeCodex
Compose interactive native BB visual replies with OpenUI or json-render.
Skill Claude CodeCodex
Present compact interactive HTML in BB replies with the visual-replies-prototype plugin.
Skill Claude CodeCodex
Inspect or run private Git backups of BB automation definitions.
Skill Claude CodeCodex
Publishes and updates hosted Claude Artifacts from an agent without native artifact tools. Use when asked to hand a page to interactive Claude Code, publish a Claude artifact from Codex or BB, or update an existing artifact URL. Not for local HTML previews or choosing artifact interaction patterns.
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: