oh-my-codex is a workflow layer for OpenAI Codex CLI that adds prompts, agent teams, skills, hooks, HUDs, and other runtime assistance while leaving Codex as the execution engine. It is for people who use Codex CLI and want structured workflows and additional help as tasks become larger. The catalogue entries are its skills, hooks, and MCP integrations for those Codex workflows.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add Yeachan-Heo/oh-my-codex --skill designgit clone --depth 1 https://github.com/Yeachan-Heo/oh-my-codexWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/yeachan-heo/oh-my-codex/design)<a href="https://agentmods.dev/skills/yeachan-heo/oh-my-codex/design"><img src="https://agentmods.dev/badge/skills/yeachan-heo/oh-my-codex/design/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/yeachan-heo/oh-my-codex/design"><img src="https://agentmods.dev/badge/skills/yeachan-heo/oh-my-codex/design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00021 | $0.00894 |
| Opus 5 | $0.00010 | $0.00447 |
| Sonnet 5 | $0.00004 | $0.00179 |
| Haiku 4.5 | $0.00002 | $0.00089 |
Grade A, and why
design scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 81 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Design Skill
Use $design to discover product and UI evidence, close only design-critical context gaps, and create or refresh the repository’s durable DESIGN.md contract. It is a maintained design brief, not a pixel-matching loop or one-off critique.
Shared operating, delegation, state, hook, team, cancellation, and verification invariants live in templates/AGENTS.md. Follow that source instead of duplicating its rules here.
Use when
- Product, UX, frontend, or design-system decisions need a repo-local source of truth.
- A feature needs a design brief before
$ralph, a designer lane, or implementation. - Existing UI, assets, screenshots, or constraints need an actionable design summary.
Do not use it for visual-reference implementation matching (use $visual-ralph), screenshot comparison alone, or backend/infrastructure work without user-facing design impact.
Relationship to $visual-ralph
$design owns product goals, users, information architecture, visual language, components, accessibility, constraints, and open questions in DESIGN.md. $visual-ralph owns implementation against an approved visual reference or live-URL baseline, measured verdicts, and pixel-diff evidence. Run $design first when both are needed; DESIGN.md supports but does not replace the visual verdict target.
Workflow
1. Discover local evidence
Inspect and cite existing DESIGN.md, design/UX/frontend docs, README/specs/issues, routes/pages/layouts/components/stories, theme and token files, assets, screenshots/mockups, Storybook or Playwright baselines, and accessibility/responsive/i18n/platform constraints. Separate observations from inferences; note absent evidence.
2. Interview only missing context
Ask concise questions only for gaps the repository cannot resolve: users/jobs, goals/non-goals, brand personality and forbidden aesthetics, primary flows, accessibility/device/browser targets, or unavailable assets/references. If answers are unavailable, record explicit assumptions and open questions rather than blocking.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 10d ago First seen · 81 lines · 21 tokens per session scan A 3f1bddf79820
design is a skill published in the GitHub repository Yeachan-Heo/oh-my-codex (33,050 stars, last pushed today), licensed MIT. It adds 21 tokens to every session and 894 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
chakra-ui-builder
Build responsive, accessible UI components and layouts using Chakra UI v3, install or configure Chakra UI in new and existing projects, and design scalable themes using tokens, semantic tokens, recipes, and slot recipes. Use this skill whenever a user asks to build, create, or generate any UI component, page, form…
frontend-visual-qa
Audits already-rendered web, landing-page, HTML deck/slide, browser tool/game, dashboard/admin, design-system, and desktop UIs using real-browser or native-app journeys, inspected screenshots, DOM geometry, responsive or projection viewports, and a bundled Playwright sweep. Use after UI implementation to find…
prototype-web
A clickable, high-fidelity web product prototype with navigation, a hero section, feature cards, steps, social proof, and optional pricing. It is designed to resemble a finished landing page while remaining a prototype.
animation-principles
Apply animation principles — easing, staging, follow-through — to one specific UI motion. Use when tuning how an animation feels. For product-wide duration and easing tokens use motion-system (design-systems); for a full interaction spec use micro-interaction-spec.
refactoring-ui
Audit and fix visual hierarchy, spacing, color, and depth in web UIs. Use when the user mentions "my UI looks off" (or amateur/unprofessional), "fix the design", "Tailwind styling", "color palette", "visual hierarchy", "design system", "spacing scale", or "component styling". Also trigger when building consistent…
ue-component-model
Create or edit the Universal Editor component configuration (component-definition.json, component-models.json, component-filters.json) for AEM Edge Delivery Services blocks. Use this skill whenever the user mentions component models, component definitions, component filters, block configuration for the Universal…