Claude Code skills, ranked and checked

Converts a data file between formats such as CSV, Parquet, JSON, Excel and GeoJSON with DuckDB.

Searches the DuckDB and DuckLake documentation and blog posts through a locally cached full-text index.

Runs SQL, or answers natural-language questions, against an attached DuckDB database or directly against files.

Reads and profiles a data file or remote URL in CSV, JSON, Parquet, Avro, Excel, spatial or SQLite format with DuckDB.

Explores and queries data on S3, Cloudflare R2, GCS, MinIO and other S3-compatible storage with DuckDB.

Covers every Shopify developer surface in one skill: the CLI, Admin and Storefront APIs, Functions, Polaris and themes.

Uses the UCP CLI to find, compare, buy and track products from online merchants.

Runs analytical SQL on local files, URLs, S3 paths and remote databases with chDB, without setting up a server.

Helps design ClickHouse architectures and choose between ingestion and modelling patterns for a given workload.

Reviews ClickHouse schemas, queries and configurations against 31 documented rules.

Writes and organises Dart unit tests for functions, methods and classes with package:test.

Structures Dart command-line applications: entrypoints, exit codes, stream routing, argument parsing and subprocesses.

Runs dart analyze to find warnings and errors, and applies dart fix to resolve mechanical lint issues.

Applies Dart 3 pattern matching, switch expressions and destructuring to replace complex if-else chains.

Reference for building production Tavily integrations: web search, content extraction, crawling and research.

Sets up, authenticates and troubleshoots the Tavily CLI, and helps choose between its web commands.

Crawls a website and extracts content from many pages through the Tavily CLI.

Runs Tavily searches programmatically and filters large results before they enter the model's context.

Extracts clean markdown or text from specific URLs through the Tavily CLI.

Discovers and lists all the URLs on a website without extracting content, through the Tavily CLI.

Conducts in-depth research with citations through the Tavily CLI, for reports, comparisons and market analysis.

Searches the web through the Tavily CLI and returns results optimised for LLMs.

Builds voice AI agents with ElevenLabs, such as voice assistants and customer service bots with tools and workflows.

Dubs audio and video into other languages with the ElevenLabs Dubbing API, keeping the original speakers' voices.