Stats
Actions
Tags
'%20stop-opacity%3D'0.16'%2F%3E%3Cstop%20offset%3D'1'%20stop-color%3D'rgb(200%2C90%2C60)'%20stop-opacity%3D'0.03'%2F%3E%3C%2FlinearGradient%3E%3C%2Fdefs%3E%3Crect%20width%3D'320'%20height%3D'200'%20fill%3D'url(%23g)'%2F%3E%3Ccircle%20cx%3D'250'%20cy%3D'56'%20r%3D'92'%20fill%3D'rgb(200%2C90%2C60)'%20fill-opacity%3D'0.06'%2F%3E%3Ccircle%20cx%3D'64'%20cy%3D'172'%20r%3D'58'%20fill%3D'rgb(200%2C90%2C60)'%20fill-opacity%3D'0.05'%2F%3E%3C%2Fsvg%3E)
From Harness Data
DuckDB + MotherDuck conventions — local-first SQL over Parquet/CSV/JSON with no warehouse round-trip, MotherDuck OAuth (never a static token), sample-then-scale even locally, and DuckDB as a join engine for Polars via pl.SQLContext. Use when querying local data files or using DuckDB/MotherDuck. The duckdb MCP server ships with this plugin.
How this skill is triggered — by the user, by Claude, or both
Slash command
/harness-data:addon-duckdb-mcpThe summary Claude sees in its skill listing — used to decide when to auto-load this skill
- **Local-first SQL.** DuckDB reads local Parquet, CSV, JSON directly;
pl.SQLContext or Ibis).MOTHERDUCK_TOKEN is refused by
the block-static-warehouse-creds.sh shared hook.LIMIT 1000 on a large parquet
is faster than full scan. The block-unbounded-sql.sh shared hook
enforces.pl.SQLContext for joins
Polars expresses awkwardly.npx claudepluginhub camilool8/harness-engineering-templates --plugin harness-dataOffers UI/UX design guidance for web and mobile with 50+ styles, 161 color palettes, 57 font pairings, and 99 UX guidelines across 10 stacks. Use for designing pages, components, color systems, or reviewing UI code.
Mines projects and conversations into a searchable memory palace. Activates on queries about MemPalace, memory palace, mining, searching, palace setup, wings, rooms, drawers, or recalling past work.