Math
Mathematical computations, formulas, statistics
data-prep
by smouj
Prepare and clean data for machine learning with feature engineering and preprocessing. This skill handles missing values, normalization, encoding, and ML-ready dataset creation.
proof-inventory
by tonyflo79
Catalog, classify, and score all available proof elements for a product or offer. Use after research (Skill 01) is complete and you need to build a comprehensive inventory of testimonials, clinical studies, data points, credentials, awards, media mentions, and other proof assets. Produces a scored proof inventory with gap analysis and promise ceiling calculation. The proof inventory determines what claims you can credibly make — without it, copy makes promises the proof can't support. Trigger when users mention proof inventory, testimonials, evidence audit, social proof, clinical proof, proof scoring, or promise ceiling. Requires research handoff from Skill 01.
xlsx
by Victory-Hugo
"全面的电子表格创建、编辑与分析工具，支持公式、格式设置、数据分析和可视化。当需要处理电子表格（如 .xlsx、.xlsm、.csv、.tsv 等）时使用，包括：(1) 创建包含公式和格式的新电子表格，(2) 读取或分析数据，(3) 在保留公式的情况下修改现有电子表格，(4) 在电子表格中进行数据分析和可视化，或 (5) 重新计算公式。"
xlsx
by aiagentskills
"Comprehensive spreadsheet creation, editing, and analysis with support for formulas, formatting, data analysis, and visualization. When Claude needs to work with spreadsheets (.xlsx, .xlsm, .csv, .tsv, etc) for: (1) Creating new spreadsheets with formulas and formatting, (2) Reading or analyzing data, (3) Modify existing spreadsheets while preserving formulas, (4) Data analysis and visualization in spreadsheets, or (5) Recalculating formulas"
numpy-statistics
by cuba6112
Standard and NaN-robust statistical functions for data analysis, histograms, and correlation matrices. Triggers: statistics, mean, nanmean, histogram, corrcoef, percentile, std.
postgis-dwithin
by mmbmf1
Distance-based spatial filtering with ST_DWithin, using index-friendly and unit-safe patterns.
csv-data-summary
by JetSquirrel
Analyzes CSV files, generates comprehensive summary statistics, identifies data patterns, and creates visualizations using Python and pandas. Automatically adapts analysis based on data type (sales, customer, financial, survey, operational).
matrix-calculus
by Victorrustless969
Matrix calculus tutorial and reference based on Jan R. Magnus' "A gentle introduction to matrix calculus". Provides tools, theorems, and worked examples for matrix differential calculus including trace, Kronecker product, vec operator, commutation matrix, duplication matrix, first and second derivatives, optimization, and applications in statistics and econometrics. Use when users ask about matrix derivatives, matrix differential calculus, optimization with matrices, Kronecker products, vec operators, or need help solving matrix calculus problems.
theory2-physics
by slapglif
Use when performing mathematical physics computations - Lie algebras, quantum chemistry, neural operators, theorem proving, or scientific validation. Provides guidance on Theory2 CLI usage, computational workflows, and verification methodology.
false-calculator
by tobidsn
A fun skill that provides wrong math answers with confidence. Specifically, for any addition (+), it adds an extra 5 to the actual result. Triggers when the user asks for simple math addition or when calculating sums.
remotion-editor
by rayBlock
Best practices for building video editors and interactive tools with Remotion
postgis-distance
by mmbmf1
Compute numeric distances safely with ST_Distance (geometry vs geography units) and pair with ST_DWithin for performance.
hook-timer
by rozwer
hook-timer.jsonl からフック実行タイミングを表示します。500ms 超のフックを「要最適化」として強調します。
zhin-ai-integration
by zhinjs
Guides integration of AI/LLM capabilities in Zhin plugins using @zhin.js/ai. Covers multi-model providers, Agent tool calling, session management, streaming responses, unified tool services, and rich media output. Use when adding AI chat, agents, or tool-calling features to a Zhin bot.
excel-skills
by Olino3
Forge is a marketplace for a Claude Code Plugins
openscad-iterative-modeling
by fboldo
Iteratively generate OpenSCAD (SCAD) code, render PNG previews, visually critique the result, and refine in a tight loop until the model matches. Use when the user asks to create a 3D model, design a part, make a bracket/enclosure/mount, render in OpenSCAD, export STL, or any request that can be expressed as parametric CSG geometry. Requires the OpenSCAD MCP server tools (render_scad_png, export_scad_stl).
data-analysis
by IchenDEV
数据分析流程，从数据探索到洞察报告的完整工作流
direct-response-copy
by Growth4U-systems
"Write copy that converts. Use when writing landing pages, emails, sales copy, headlines, CTAs, social posts, or any persuasive content. Triggers on: make this convert, write copy for X, help me sell X, punch this up, write a landing page, write sales copy. Produces internet-native copy that sounds like a smart friend explaining something while quietly deploying every persuasion principle in the book. Includes complete reference material from Schwartz, Hopkins, Ogilvy, Halbert, Caples, Sugarman, and Collier."
blecsd-3d
by Kadajett
Render 3D graphics in the terminal with @blecsd/3d. Covers software rasterizer, 3D math (vec3/mat4), multiple backends (braille/sixel/kitty), OBJ loading, scene graphs, and camera systems.
obsidian-bases
by ylt
Create and edit Obsidian Bases (.base files) with views, filters, formulas, and summaries. Use when working with .base files, creating database-like views of notes, or when the user mentions Bases, table views, card views, filters, or formulas in Obsidian.