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By agent · Codex

Codex skills: 1008 worth installing

Skills in the open SKILL.md format that Codex reads. Each one has a plain-language summary and the command to install it.

Installing a skill in Codex

$ npx skills add <author>/<skill> --agent codex

Replace the placeholder with the author and skill name from the skill's page. Start a new Codex session afterwards so the skill is picked up.

Skills for Codex

All skills

Motion Doctrine

HeyGenOfficial

Guides HyperFrames animation with vector-led seams, continuous camera momentum and purposeful in-scene motion instead of disconnected slides.

Video and mediaGitHub stars: 55.6kInstalls: 61.6k

Captions Overlay

HeyGenOfficial

Keeps Hyperframes captions as a layered overlay, classifying speech into dropped filler, readable rail subtitles and scarce embedded peak words.

Video and mediaGitHub stars: 55.6kInstalls: 61.5k

Cut the Curve

HeyGenOfficial

Defines velocity-matched motion transitions for GSAP video compositions, including scene cuts, zoom swaps, word cascades and in-scene group slides.

Video and mediaGitHub stars: 55.6kInstalls: 61.3k

Seam Craft

HeyGenOfficial

Ensures HyperFrames scene transitions composite correctly by guarding the stage background and coordinating wrapper overlap, tracks and master-timeline timing.

Video and mediaGitHub stars: 55.6kInstalls: 61k

Changelog Video

HeyGenOfficial

Turns weekly HyperFrames changelog Markdown into a branded square video with animated UI scenes, Annie voiceover and captions.

Video and mediaGitHub stars: 55.6kInstalls: 60.9k

Oversized Cursor

HeyGenOfficial

Guides HyperFrames launch-video scenes with an oversized cursor that enters physically, targets and clicks UI elements, and carries motion between beats.

Video and mediaGitHub stars: 55.6kInstalls: 60.9k

Builds GSAP ScrollTrigger animations that link motion to scrolling, with pinning, scrubbing and parallax support.

DevelopmentGitHub stars: 15.9kInstalls: 59.7k

Hallmark

Hassan El Mghari

Creates distinctive, responsive web interfaces with Hallmark's rules for avoiding generic AI-generated design, for new pages, audits, redesigns and design studies.

DesignGitHub stars: 29.4kInstalls: 59k

Optimises GSAP animations for smoother rendering by favouring transforms and opacity, batching work, and reducing costly layout and paint updates.

Video and mediaGitHub stars: 15.9kInstalls: 57.5k

GSAP Timeline

GreenSock

Sequences GSAP animations with timelines, position parameters, labels and nested timelines for coordinated playback and maintainable choreography.

DevelopmentGitHub stars: 15.9kInstalls: 57.2k

GSAP Plugins

GreenSock

Guides GSAP plugin setup and animation work for scrolling, layout transitions, dragging, text, SVG, physics and custom easing.

DevelopmentGitHub stars: 15.9kInstalls: 55.8k

GWS Sheets Read

Google WorkspaceOfficial

Reads values from Google Sheets ranges using the gws command-line tool without modifying the spreadsheet.

ProductivityGitHub stars: 31.2kInstalls: 48.3k

Creates high-fidelity HTML prototypes, slide decks, animations and visualisations through three visual directions and an approval-led design workflow.

DesignGitHub stars: 24.6kInstalls: 47.8k

GWS Docs Write

Google WorkspaceOfficial

Appends plain text to the end of a Google Docs document through the Google Workspace CLI.

DocumentsGitHub stars: 31.2kInstalls: 47.8k

GWS Calendar Agenda

Google WorkspaceOfficial

Shows upcoming events from Google Calendar across all calendars, with filters for dates, calendars and timezones.

ProductivityGitHub stars: 31.2kInstalls: 47.3k

GWS Drive Upload

Google WorkspaceOfficial

Uploads local files to Google Drive with automatic MIME detection, optional parent folders and target filenames.

ProductivityGitHub stars: 31.2kInstalls: 47k

GWS Calendar Insert

Google WorkspaceOfficial

Creates Google Calendar events with dates, locations, descriptions, attendees and optional Google Meet links using the GWS CLI.

ProductivityGitHub stars: 31.2kInstalls: 46.1k

GWS Sheets Append

Google WorkspaceOfficial

Appends single or multiple rows to Google Sheets through the gws command-line tool, with optional ranges and JSON values.

DataGitHub stars: 31.2kInstalls: 44.4k

Guides agents through Agent Skills by matching work to the right workflow, sequencing related skills, and enforcing assumptions, scope and verification.

ProductivityGitHub stars: 100kInstalls: 42.5k

GWS Gmail Read

Google WorkspaceOfficial

Reads Gmail messages with optional headers, HTML bodies and JSON output through the Google Workspace CLI.

ProductivityGitHub stars: 31.2kInstalls: 39.4k

GWS Keep

Google WorkspaceOfficial

Manages Google Keep notes and attachments through the gws CLI, including creating, listing, retrieving, deleting and permission operations.

ProductivityGitHub stars: 31.2kInstalls: 36.5k

GWS Gmail Watch

Google WorkspaceOfficial

Streams new Gmail messages as NDJSON through the gws CLI, with Pub/Sub setup, label filters, one-off pulls and optional JSON file output.

ProductivityGitHub stars: 31.2kInstalls: 35.9k

GWS Gmail Reply

Google WorkspaceOfficial

Replies to Gmail messages with threading, recipients, attachments, HTML content, or draft saving through the gws command-line tool.

ProductivityGitHub stars: 31.2kInstalls: 33.8k

Creates Flutter model classes with type-safe fromJson and toJson methods, and guides synchronous or background parsing of HTTP JSON responses.

DevelopmentGitHub stars: 3kInstalls: 33.4k

Questions

Codex and skills.

Do Claude skills work in Codex?

Often. A skill is a folder of instructions and scripts in the open SKILL.md format, which Codex reads. A skill that depends on tools only one agent provides will not carry over, so read the skill's source before you rely on it.

How do I install a skill in Codex?

Each skill page has an install command. Run it in a terminal, then start a new Codex session so the skill is picked up.

What is the difference between a skill and an instructions file such as AGENTS.md?

An instructions file is loaded in every session and describes the project. A skill is loaded only when a task calls for it, so it can be long and specific without costing context on every turn.

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