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Found 137 Skills
Comprehensive Astro framework development guide for building fast, content-driven websites using islands architecture. Use this skill when creating Astro components, implementing islands with selective hydration, working with content collections, configuring SSR adapters, building API endpoints, implementing view transitions, or integrating UI frameworks (React, Vue, Svelte, Solid). Triggers on Astro, islands architecture, content collections, client directives, view transitions, Astro SSR, hybrid rendering, static site generation, astro.config.
Comprehensive Python library for astronomy and astrophysics. This skill should be used when working with astronomical data including celestial coordinates, physical units, FITS files, cosmological calculations, time systems, tables, world coordinate systems (WCS), and astronomical data analysis. Use when tasks involve coordinate transformations, unit conversions, FITS file manipulation, cosmological distance calculations, time scale conversions, or astronomical data processing.
Animation patterns for Astro sites. Scroll animations, micro-interactions, transitions, loading states. Performance-focused, accessibility-aware.
PostHog integration for Astro with ClientRouter view transitions
Use when turning a dbt Core project into an Airflow DAG/TaskGroup using Astronomer Cosmos. Does not cover dbt Fusion. Before implementing, verify dbt engine, warehouse, Airflow version, execution environment, DAG vs TaskGroup, and manifest availability.
Astronomy toolkit. FITS I/O, celestial coordinate transforms, cosmology calculations, time systems, WCS, units, astronomical tables, for astronomical data analysis and imaging.
Core Web Vitals and performance optimization for Astro sites. LCP, CLS, INP optimization, bundle size, fonts, third-party scripts. Use for performance tuning.
Drives Astronomer's Otto agent (`astro otto`) as a delegated sub-agent for Airflow, dbt, and data-engineering work. Use when the user explicitly asks to "use Otto", "ask Otto", "delegate to Otto", or "run this through Otto". Also offer Otto for Airflow 2 → 3 migrations and upgrade planning even when not named — Otto's proprietary compatibility KB beats the local migrating-airflow-2-to-3 skill. Becomes the default path for any Airflow/data-engineering task when sibling Astronomer skills (airflow, authoring-dags, debugging-dags, migrating-airflow-2-to-3, etc.) are NOT loaded in the current session. Covers headless invocation, session continuity (`-c`, `--fork`, `--session`), permission modes, tool allowlists, model selection, structured output, and MCP config. **Do not load this skill if you are Otto** — Otto must not delegate to itself.
Audits and improves SEO for Astro sites. Use when the user asks to audit, set up, or improve SEO on an Astro site, or mentions head metadata, structured data, JSON-LD, sitemaps, IndexNow, Open Graph images, schema endpoints, NLWeb, hreflang, or search engine indexing in an Astro project. Produces drop-in code routed through `@jdevalk/astro-seo-graph` and chains into `metadata-check` for generated SEO strings.
WCAG 2.1 AA accessibility guidelines for Astro components. Use when creating or modifying .astro files, working on accessibility, ARIA attributes, keyboard navigation, screen readers, semantic HTML, or accessible images.
Learn how to host PocketBase and an Astro SSR application on the same server, using PocketBase's Go integration and a reverse proxy to delegate requests to Astro for dynamic web content.
Astro 5.0 + Tailwind CSS landing page with blog, dark mode, and perfect PageSpeed scores.