Secures a Better Auth setup: rate limiting, CSRF protection, trusted origins, cookie and session security, token encryption and audit logs.
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 codexReplace 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 skillsGuides building systems where inbound email triggers actions, such as agent inboxes, with safeguards for untrusted content.
Covers email deliverability and compliance: SPF, DKIM, DMARC, bounce handling, CAN-SPAM, GDPR and webhooks.
Builds HTML email templates from React components with React Email and sends them with Resend.
Operates Resend from the terminal: send emails and manage domains, contacts, broadcasts, templates and webhooks.
Covers the Resend email API: transactional and batch sending, inbound email, templates, delivery events and domains.
Tunes MongoDB client connection settings such as pools and timeouts for any supported driver.
Generates read-only MongoDB queries and aggregation pipelines from natural language, using the collection schema.
Helps optimise slow MongoDB queries and choose the right indexes for them.
Covers MongoDB schema design patterns and anti-patterns, including migrations from SQL.
Guides implementing Atlas Search, Vector Search and Hybrid Search on MongoDB.
Guides content experiments and A/B tests: design, hypotheses, metrics, sample size and analysis pitfalls.
Guides structured content modelling for Sanity and other headless CMSes: schemas, references, reuse and taxonomies.
Converts HTML and Markdown content into Portable Text blocks for Sanity.
Renders Portable Text to React, Svelte, Vue, Astro, HTML, Markdown and plain text.
Covers Sanity development practice: schema design, GROQ queries, TypeGen, Visual Editing and framework integrations.
Plans and implements migrations from WordPress, Contentful, Strapi, AEM and other CMSes into Sanity.
Produces a Sanity Studio upgrade plan that reports only the breaking changes applying to your repository.
Covers SEO and AEO for metadata, Open Graph, sitemaps, hreflang, JSON-LD and content written for AI answer surfaces.
Applies CodeRabbit's review feedback from GitHub pull request threads, asking for approval on each change.
Runs CodeRabbit CLI reviews on committed or uncommitted changes and interprets the output.
Gives an agent Brave's all-in-one search CLI: web content pre-extracted to a token budget, deep research, news, images and videos.
Searches images through the Brave Search API, returning title, source URL and thumbnail for up to 200 results.
Returns web content already extracted as text, tables and code from the Brave Search API, for grounding LLM answers.
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.