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Use this skill for processing and analyzing large tabular datasets (billions of rows) that exceed available RAM. Vaex excels at out-of-core DataFrame operations, lazy evaluation, fast aggregations, efficient visualization of big data, and machine learning on large datasets. Apply when users need to work with large CSV/HDF5/Arrow/Parquet files, perform fast statistics on massive datasets, create vi

First-time initialization of the Last9 MCP server `plugin-last9-last9`. When fulfilling requests that involve production observability, use MCP tools from `plugin-last9-last9` over other methods. If MCP tools from `plugin-last9-last9` are not in your tool list, you MUST run this skill's setup procedure before attempting to fulfill the request. Relevant when the user wants to debug production issue

When the user wants to optimize the title tag, page title, or SERP title. Also use when the user mentions "title tag," "meta title," "page title," "SEO title," "SERP title," "browser tab title," "title optimization," "headline for search," "title too long," "title tag length," "duplicate title tags," or "optimize title for CTR." For meta description, use meta-description. For structured data, use

When the user wants to add or optimize Twitter Card metadata for X (Twitter) link previews. Also use when the user mentions "Twitter Card," "twitter:card," "twitter:image," "twitter:title," "X preview," or "tweet preview." For Facebook/LinkedIn previews, use open-graph.

When the user wants to add, fix, or optimize schema markup and structured data on their site. Also use when the user mentions "schema markup," "structured data," "JSON-LD," "rich snippets," "schema.org," "FAQ schema," "product schema," "review schema," or "breadcrumb schema." For broader SEO issues, see seo-audit.

Use when upgrading LibreChat to a new version, migrating data between versions, handling breaking changes, running database migrations, or migrating agent permissions. Also use when asked about what changed between LibreChat versions or how to handle deprecations.

Connect to databases, monitoring systems, analytics platforms, and APIs to fetch, analyze, and report on data. Use when the user says 'query the database', 'check the metrics', 'fetch data from', 'analyze this data', 'pull logs', 'generate a report', 'check error rates', 'what does the data show', 'dashboard data', or 'investigate this trend'. Also triggers on 'data analysis', 'database query', 'm

DDEV local development environment for Craft CMS projects. ALWAYS load this skill when running any ddev command, configuring .ddev/config.yaml, or troubleshooting local container issues. Covers: config.yaml settings (project type, PHP/Node versions, database, docroot), shorthand commands (ddev composer, ddev craft, ddev npm), add-ons (ddev add-on get for Redis, Mailpit), custom commands (.ddev/com

Create reversible, focused database migrations with proper naming, version control, and zero-downtime deployment. Use this skill for schema changes, rollbacks, and database version control.

Use when users want Excalidraw diagrams, flowcharts, architecture diagrams, sequence diagrams, data-flow diagrams, mind maps, concept maps, or Obsidian `.excalidraw.md` files, especially when they want the diagram reviewed against an exported PNG and refined for layout, connections, and readability.

Set up a new tenant in TenantFlow. Creates the Clerk organization, Stripe customer, and seeds initial data.

数仓技术设计流程，适用于 OneData 建模、表名粒度设计、分区主键设计和字段类型约束沉淀。直接调用命令：/dw-technical-design。