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Claude Skills

The open format is called Agent Skills and works in Claude Code, Codex, Cursor and other agents — most people know it as Claude Skills.

Every Agent Skill we could find on GitHub, deduplicated by content. 79 566 files from 1 758 authors, of which 61 913 are unique — the rest is the same skill repackaged into someone else's repository. For each one: what it weighs in tokens, whether it ships runnable scripts, and which MCP servers it needs.

61 913
unique skills
out of 79 566 files found on GitHub
17 653
are copies
same content, someone else's repository
1 739
tokens, median
what a typical skill costs you in context
7 886
name collisions
two skills with one name cannot sit side by side

43 261–43 320 of 61 913

page 722 of 1 032
PDF Form Filling
by cxcscmu

Use this skill to identify, extract, and populate specific fields within a PDF form using the pdftk or pikepdf toolsets.

225 tokens
Greedy Matching Evaluation
by cxcscmu

Evaluating clustering performance using greedy matching of predicted centroids against ground truth points.

273 tokens
Hyperparameter Grid Parallelization
by cxcscmu

Efficiently executing grid search over massive parameter spaces using Python multiprocessing.

198 tokens
Pareto Frontier Optimization
by cxcscmu

Identifying Pareto-optimal points in a multi-objective optimization space.

175 tokens
Cvss Data Normalization
by cxcscmu

Logic to parse nested security database objects into a scalar CVSS score for the final CSV report.

229 tokens
Dependency Vulnerability Scanner
by cxcscmu

Analyze /root/package-lock.json to identify HIGH and CRITICAL vulnerabilities using automated security audit tools and database lookups.

335 tokens
Security Report Generation
by cxcscmu

Construct the final CSV output file ensuring strict column compliance with the security audit requirements.

171 tokens
Calculate Max Distance To Boundary
by cxcscmu

Compute the distance from each Pacific plate earthquake to the unified plate boundary.

201 tokens
Export Earthquake Result
by cxcscmu

Format and save the identified earthquake data as a JSON file.

125 tokens
Load And Preprocess Spatial Data
by cxcscmu

Load earthquake GeoJSON and plate boundary datasets, and ensure consistent projection for distance analysis.

236 tokens
Answer Formatter And Tracker
by cxcscmu

Use this to structure the final output into the required JSON schema, calculating precise token usage based on the retrieved context.

214 tokens
Enterprise Data Retrieval
by cxcscmu

Use this to search, filter, and navigate enterprise artifacts (/root/DATA) to answer specific questions, ensuring cross-product isolation and multi-hop link traversal.

223 tokens
Question Processor
by cxcscmu

Use this to ingest the task file and orchestrate the multi-step retrieval and formatting workflow.

157 tokens
Comparative Holding Analysis
by cxcscmu

Compares holding changes between two quarters for a specific fund to determine investment increases.

192 tokens
Cross Fund Security Search
by cxcscmu

Searches all funds within a specific quarter to rank holdings for a target security by CUSIP.

153 tokens
Data Format Validation
by cxcscmu

Ensures the generated output strictly adheres to the required JSON schema.

157 tokens
One Fund Analysis
by cxcscmu

Extracts AUM and total holdings count for a specific fund using its accession number and the quarter folder path.

177 tokens
Apply And Rebuild
by cxcscmu

Applying patches to the Druid source code and performing a targeted Maven build.

196 tokens
Logic Neutralization
by cxcscmu

Neutralizing malicious logic by modifying class deserialization behaviors.

220 tokens
Patch Generation
by cxcscmu

Generating and saving git-compatible patch files for Apache Druid source code.

232 tokens
Data Processing and JSON Serialization
by cxcscmu

Used to transform raw GitHub CLI output into the required reporting structure, ensuring data integrity and correct typing.

261 tokens
GitHub CLI Data Retrieval
by cxcscmu

Used to query, filter, and extract metadata from GitHub PRs and Issues using the `gh` command line tool with appropriate search qualifiers and pagination limits.

305 tokens
Environment Synchronization
by cxcscmu

Synchronizes the Python environment with specific dependency versions defined in project files to ensure numerical reproducibility.

166 tokens
Simpo Loss Implementation
by cxcscmu

Implements the SimPO loss function using stable log-probability operations in the specified trainer file.

159 tokens
Unit Test Execution And Verification
by cxcscmu

Creates an orchestration script to run the immutable unit test and capture the output loss values.

161 tokens
DOCX Template Manipulation
by cxcscmu

Strategies for programmatically modifying .docx files, handling placeholders, and performing conditional text removal.

307 tokens
JSON Data Parsing
by cxcscmu

How to read and extract specific values from employee_data.json to map them to template placeholders.

169 tokens
Document Content Extraction
by cxcscmu

Robustly extracts text from PDF, DOCX, and PPTX files while maintaining structural integrity for multi-column layouts and nested elements.

199 tokens
File System Management
by cxcscmu

Safely moves files into target directories while preventing collisions, handling path logic, and maintaining state.

228 tokens
Semantic Subject Classification
by cxcscmu

Maps documents to specific categories using a combination of keyword-based semantic matching and categorical hierarchy.

218 tokens
Scala API Compatibility
by cxcscmu

Aligning the implementation with provided Test Specifications.

189 tokens
Scala Domain Modeling
by cxcscmu

Translating Python dynamic structures into type-safe Scala ADTs and case classes.

166 tokens
Scala Functional Abstractions
by cxcscmu

Implementing tokenization logic using functional patterns and standard library collections.

236 tokens
Email Request Parser
by cxcscmu

Extracts meeting requirements from /root/test_input.json, handling variable constraints and field parsing.

168 tokens
Orchestrate Scheduling
by cxcscmu

Resolves scheduling conflicts between email requests and calendar availability, prioritizing meeting requests over blue (flexible) blocks.

264 tokens
PDF Calendar Parser
by cxcscmu

Parses /root/calendar.pdf to extract appointment timings, color-coded blocks, and time-axis mappings using pdfplumber.

351 tokens
Environment Setup And File Generation
by cxcscmu

Creates the directory structure, copies data, and writes the specific JS/CSS/HTML files required for the web application.

217 tokens
Styling And Formatting
by cxcscmu

Defines the layout, chart aesthetics, and table styling in style.css.

186 tokens
Visualization Logic Implementation
by cxcscmu

Implements the D3.js force simulation, tooltips, and data interaction logic in visualization.js.

266 tokens
Calibrate Glm
by cxcscmu

Performs efficient parameter optimization using a heuristic search or scipy.optimize to satisfy RMSE constraints within fixed parameter ranges.

237 tokens
Compute Metrics
by cxcscmu

Calculates RMSE between simulated and observed data using exact datetime matching and integer depth binning based on simulation start date 2009-01-01.

282 tokens
Run Glm Simulation
by cxcscmu

Executes the GLM simulation and retrieves lake-specific depth data to ensure accurate mapping between model output and field observations.

199 tokens
Update Glm Config
by cxcscmu

Safely updates specific calibration parameters in the glm3.nml file using f90nml, maintaining correct namelist group mapping and file integrity.

244 tokens
Data Querying And Filtering
by cxcscmu

Instructions for querying the provided datasets to ensure constraints regarding pet-friendly lodging, specific cuisines, and valid locations are met.

194 tokens
JSON Itinerary Formatting
by cxcscmu

Ensures the final output strictly adheres to the requested JSON structure and field requirements.

142 tokens
Route Planning And Logistics
by cxcscmu

Determines the driving route from Minneapolis to Ohio, segments the 7-day travel period into manageable travel and stay durations, and ensures no flights are used.

202 tokens
CSV Generation
by cxcscmu

Aggregate object counts into a structured CSV file.

234 tokens
Image Preprocessing
by cxcscmu

Convert images to grayscale in-place using OpenCV.

106 tokens
Object Counting
by cxcscmu

Count objects in an image using the command-line interface of the object detection script.

129 tokens
Video Frame Extraction
by cxcscmu

Use ffmpeg to extract keyframes from a video file into a target directory.

127 tokens
Data Retrieval using INDEX and MATCH
by cxcscmu

Use INDEX combined with MATCH to retrieve data from a source table based on two criteria (row and column headers).

167 tokens
Statistical Calculation and Formatting
by cxcscmu

Perform descriptive statistical analysis while ensuring results are displayed as percentages rounded to one decimal place.

195 tokens
Weighted Mean using SUMPRODUCT
by cxcscmu

Calculate the weighted mean by multiplying Net Exports % by the corresponding GDP values and dividing by the total GDP.

197 tokens
Run3 Skill 1
by cxcscmu
188 tokens
Modern Mandarin Rhyme Tones
by cxcscmu

Guidelines for mapping modern Mandarin pronunciation (Pinyin) to traditional Ping (Level) and Ze (Oblique) poetic tones, and identifying modern rhyme families.

457 tokens
Qiyan Lvshi Composition
by cxcscmu

Structural, syntactical, and tonal rules for composing a seven-character regulated verse (七言律诗).

575 tokens
Pypdf Form Filling
by cxcscmu

Inspecting and filling interactive PDF forms (AcroForms) using the pypdf library. Crucial for automating the population of government or legal PDF documents.

750 tokens
Dbscan Anisotropic Distance
by cxcscmu

Efficiently computing DBSCAN with a custom weighted (anisotropic) distance metric using coordinate scaling, avoiding the overhead of slow custom distance functions.

526 tokens
Run1 Skill 1
by cxcscmu
184 tokens
Geopandas Spatial Analysis
by cxcscmu

How to perform spatial filtering (point-in-polygon), combine line boundaries, and accurately calculate metric distances between points and boundaries using GeoPandas.

829 tokens

Claude Skills — questions

Answers built from the skills we actually parsed.

What is a Claude Skill?
A folder with a SKILL.md file: instructions that teach an agent to do one thing well, optionally with scripts and reference files alongside. The format is open and called Agent Skills — Claude Code, Codex and other agents read the same files. It is not a program you run; it is knowledge the agent loads when the task calls for it.
How is a skill different from an MCP server?
A server gives the agent new abilities — it connects to something and exposes tools. A skill gives the agent knowledge: how to use what it already has. They combine, and often literally: 11 350 of the skills here declare which MCP servers they need to work.
Why are there fewer skills here than in other catalogues?
Because we deduplicate by content. Of 79 566 files found on GitHub, 61 913 are unique — the rest is the same skill copied into someone else's repository, word for word. Catalogues that count files rather than skills show every copy as a separate entry.
What does the token count mean?
A skill is loaded into the model's context when it is used, so its size is a running cost on every request that touches it. We measure the whole folder, not just SKILL.md: one official skill is 377 tokens, another drags 83 files of fonts behind it.
How do I install a skill?
Copy the skill folder into ~/.claude/skills for personal use, or into .claude/skills inside a project. The agent picks it up by the name in the SKILL.md header — which is worth checking: 7 886 skills here share a name with another skill, and two of them cannot sit side by side.