Agent skills for DeepSeek Harness

Pre-build session with the rubber duck — runs BEFORE implementation, covering both a pre-coding design sketch and plan/spec review.

MUST use when writing DuckDB queries.

H3 hexagonal indexing, PostGIS-compatible spatial queries, and geographic analysis with GF(3) coloring.

Layer 3: Temporal Versioning and ACSet Schema Generation for DuckDB

Pattern expansion and schema evolution for DuckLake databases

Ergodic random walks over DuckLake lakehouses with GF(3) triadic concurrent walkers.

Maintain a persistent `.context/ISSUE/` directory for complex engineering work spanning sessions or coding agents.

Creates punchy, conversational one-liners in "Dude With Sign" style - bold statements that challenge norms, validate feelings, or poke fun…

Duffel API for booking flights and hotels (stays).

Use when targeting Duke Mathematical Journal (Duke Math.

Execute and query Dune Analytics dashboards for on-chain data and custom SQL analytics.

Create complete dungeons and adventure sites for D&D 5e 2024 — multi-room sites with room functions, encounter mix across the three…

Benchmark planner×implementer LLM pairings on a real GitHub issue and chart quality-per-dollar.

Checks evidence-backed duplication, over-abstraction, and unused extensibility.

Agent-only policy for completing investigations and visual reviews without losing unresolved captain decisions.

Write Dutch that sounds human. Not formal, not robotic, not AI-generated.

Use when a Design/UI task needs responsive adaptation across screen sizes, breakpoints, device contexts, touch or keyboard constraints…

Use when a frontend or Design/UI task needs quality checks for accessibility, performance, theming, responsive behavior, visual…

Use when a Design/UI task asks to make a safe, bland, flat, or generic interface more distinctive, energetic, memorable, or high-impact…

Use before VI production to research visual benchmarks, choose a brand direction, avoid similarity risk, or define reusable brand sources…

Use when a Design/UI or product task needs clearer UX copy, labels, microcopy, empty states, errors, instructions, or onboarding text…