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.
Extracts appointments, start/end times, and priority colors from a PDF calendar. Use this skill whenever you need to understand existing schedules from a visual PDF calendar document.
Calibrate GLM by adjusting key parameters to minimize RMSE. Use this skill when you need to iteratively tune model parameters to meet performance thresholds.
Evaluate GLM simulation results using field observations and RMSE metrics. Use this skill when you need to merge simulation results with field observations and calculate RMSE values for different conditions (overall, annual_deep, summer_deep).
Manage GLM (General Lake Model) configuration and execution. Use this skill when modifying 'glm3.nml' or running the GLM binary to ensure simulation parameters are correctly set and the model runs successfully.
Use this skill to convert RGB images to grayscale. It provides methods using common libraries like OpenCV or PIL.
Use this skill to count occurrences of a template image within a larger target image using template matching techniques.
Use this skill to extract keyframes from video files using FFmpeg. It covers selecting the right extraction frequency and naming conventions for image sequences.
Guidelines for Anthropic brand colors, typography, and aesthetic. Use this skill whenever branding, color application, or corporate design standards are relevant to a project.
Guidelines for creating technical exploded-view diagrams. Use this skill whenever drawing hardware, internal components, or technical exploded views.
Guidelines for composing classical Chinese seven-character regulated verse (Qi-Yan-Lu-Shi), focusing on structure, rhythm, and emotional expression.
Guidance on ensuring a consistent rhyme scheme in modern Mandarin for classical Chinese poetry, focusing on rhyming vowels.
Guidance for filling California SC-100 Small Claims forms. Use this skill when filling out, validating, or processing California judicial council forms, specifically the SC-100.
Specialized instructions for reading, modifying, and filling PDF legal forms (e.g., California judicial council forms). Use this for any task involving PDF forms.
How to optimize DBSCAN hyperparameters for Mars cloud clustering. Use this skill whenever performing grid search, DBSCAN clustering, or evaluating F1 and delta for Mars datasets.
How to generate security audit reports in CSV format. Use this skill whenever you need to produce a `/root/security_audit.csv` report.
How to perform security audits on package-lock.json. Use this skill whenever you need to identify HIGH or CRITICAL vulnerabilities in project dependencies.
> Handles CRS transformations and distance calculations in kilometers. Use this for converting between geographic coordinates (WGS84) and equal-area projections (like Lambert Azimuthal Equal Area centered on the Pacific region) for accurate distance measurements.
> Handles loading and processing of earthquake and plate boundary data. Use this for reading, filtering, and joining geospatial datasets related to tectonics (plates, boundaries, earthquake points).
Format retrieval answers as a dictionary in /root/answer.json.
How to analyze 13F filings. Use this skill to process COVERPAGE.tsv, INFOTABLE.tsv, and metadata for hedge fund holdings and AUM.
How to rebuild Apache Druid after applying patches. Use this whenever the codebase has been modified and needs a partial or full rebuild.
How to fix the Apache Druid JavaScript sampler vulnerability. Use this skill when patching Druid code to block arbitrary JavaScript execution.
How to gather PR and issue data from a GitHub repository using the gh CLI for monthly reports. Use this skill whenever you need to fetch monthly metrics from a repository.
How to process GitHub API JSON output into a structured report.json for monthly analytics. Use this whenever you have raw JSON data from the gh CLI.
Procedures for setting up the environment for research projects involving Python, PyTorch, and NLP models. Use whenever environment requirements (environment.yml) are present.
Handles reading, populating, and saving .docx files using the python-docx library. Use this skill for any tasks involving template filling or modifying Word documents.
Use this skill to classify PDF, PPTX, or DOCX files into subject categories: LLM, trapped_ion_and_qc, black_hole, DNA, or music_history. Analyze filenames and available content to determine the correct category.
Extract appointments from calendar.pdf. Use whenever you need to determine availability from the calendar.
Extract meeting request details from JSON input. Use whenever you process meeting requests.
Use this skill whenever you need to schedule meetings, parse calendar PDFs, resolve overlapping time windows across timezones, and format schedule responses.
Use this skill for D3.js (v6) force-directed bubble charts and linked data tables. Always use this when tasked with financial data visualization using D3.js.
How to calculate and save GLM performance metrics (RMSE) to metrics.json. Use this whenever the user asks for RMSE checks or final model evaluation.
How to run GLM, modify calibration parameters, and manage simulation outputs. Use this whenever the user wants to run, calibrate, or troubleshoot GLM simulations.
How to query CSV datasets in /app/data to extract information like accommodations, attractions, and restaurants. Use this skill whenever you need to look up data from files in the /app/data directory.
How to construct a 7-day, pet-friendly travel itinerary for three Ohio cities starting from Minneapolis without using flights. Use this skill for planning, organizing the itinerary data, and formatting the final JSON output.
Use this skill for image conversion, such as grayscale conversion, to prepare images for analysis.
Use this skill for counting specific objects (coins, enemies, turtles) in images using template matching.
Use this skill to extract key frames from MP4 video files into a target directory.
How to perform data lookups in Excel using INDEX and MATCH. Use this skill when needing to extract data from a source table based on two conditions (e.g., Row header and Column header).
How to calculate weighted means in Excel using SUMPRODUCT. Use this skill when calculating the weighted average for a group (e.g., GCC Countries) by multiplying values by their corresponding weights (e.g., GDP).
How to apply Anthropic's official brand colors, typography, and design guidelines. Use this skill whenever the user mentions Anthropic styling, corporate colors, brand accents, or visual formatting for Anthropic.
How to generate 2D isometric or exploded-view technical posters programmatically. Use this skill whenever the user asks for a technical exploded-view, internal hardware layers, or an isometric hardware diagram.
How to compose a seven-character regulated verse (Qiyan Lushi). Use this skill whenever the user asks to write a seven-character regulated verse or traditional Chinese poetry, even if they don't explicitly mention the rules.
How to map and fill the California Small Claims Court form SC-100 (Plaintiff's Claim and ORDER to Go to Small Claims Court). Use this skill whenever the user mentions filling an SC-100 form or filing a small claims case in California.
Define custom distance metrics for DBSCAN clustering. Use this skill whenever a task requires clustering points with unequal weighting or application-specific distances.
Perform parallel grid search using joblib. Use this skill whenever a task requires optimizing multiple hyperparameters simultaneously across CPU cores.
Compute the Pareto frontier for multi-objective optimization. Use this skill whenever a task requires finding optimal trade-offs between conflicting metrics (e.g., maximize F1, minimize distance).
How to perform geospatial analysis using GeoPandas. Use this skill whenever the user mentions maps, coordinates, geospatial distance, plate boundaries, earthquakes, or spatial data, even if they don't explicitly ask for it.
Perform various data analysis on SEC 13-F and obtain some insights of fund activities such as number of holdings, AUM, and change of holdings between two quarters.
This skill includes search capability in 13F, such as fuzzy search a fund information using possibly inaccurate name, or fuzzy search a stock cusip info using its name.
Securing Apache Druid's JavaScriptConfig deserialization. Use this skill whenever patching or securing Jackson deserialization in Druid, especially regarding the empty key ("") bypass.
Claude Skills — questions
Answers built from the skills we actually parsed.