Data & Analytics

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by jeremylongshore

by instavm

Image processing skill for cropping images to 50% from center and rotating them 90 degrees clockwise. This skill should be used when users request image cropping to center, image rotation, or both operations combined on image files.

by ZhangHanDong

Reusable patterns for Makepad widget development, data management, and async architecture.

by fcakyon

This skill should be used when user asks to "query MongoDB", "show database collections", "get collection schema", "list MongoDB databases", "search records in MongoDB", or "check database indexes".

by jimmc414

Look up current research information using Perplexity's Sonar Pro or Sonar Reasoning Pro models through OpenRouter. Automatically selects the best model based on query complexity. Search academic papers, recent studies, technical documentation, and general research information with citations.

by jimmc414

Evaluate research rigor. Assess methodology, experimental design, statistical validity, biases, confounding, evidence quality (GRADE, Cochrane ROB), for critical analysis of scientific claims.

by yhy0

SQL 注入漏洞检测与利用。当目标存在数据库查询、搜索功能、登录表单、URL 参数时使用。包括 UNION、报错、盲注等技术。

by water-rs

Implement FFI bindings for WaterUI components across Rust, Apple Swift, and Android Kotlin/JNI layers. Use when adding new component types, metadata wrappers, or fixing native binding errors (UnsatisfiedLinkError, missing symbols, type mismatches).

by tidymodels

Detect and list all metric functions in the yardstick package. Use when a user asks to find, list, or identify all metrics in the package.

by evstack

Explains ev-node architecture, components, and internal workings. Use when the user asks how ev-node works, wants to understand the block package, DA layer, sequencing, namespaces, or needs architecture explanations. Covers block production, syncing, DA submission, forced inclusion, single vs based sequencer, and censorship resistance.

by No-Trade-No-Life

基于Hyperliquid成功实现经验，为新交易所供应商提供Yuan框架集成指南。使用此技能当需要为新的交易所创建供应商实现，包括项目结构设计、API集成、核心服务实现和最佳实践。适用于交易所API集成、金融系统开发、微服务架构设计。

by elbwalker

Use when transforming events at any point in the flow (source→collector or collector→destination), configuring data/map/loop/condition, or understanding value extraction. Covers all mapping strategies.

by elbwalker

Use when working with sources, understanding event capture, or learning about the push interface. Covers browser, dataLayer, and server source patterns.

by vfarcic

Query sibling dot-ai projects to verify features are USABLE (not just defined). IMPORTANT: When calling this skill, explain HOW you plan to use the feature (e.g., 'I need to call X via REST API from the UI' or 'I need to import Y function'). This helps verify the full chain from definition to exposure.

by kalbasit

Managing database migrations with dbmate

by kalbasit

Working with sqlc and database queries

by CharlesWiltgen

Use when making app surface in Spotlight search, Siri suggestions, or system experiences - covers the 6-step strategy combining App Intents, App Shortcuts, Core Spotlight, and NSUserActivity to feed the system metadata for iOS 16+

by CharlesWiltgen

Use when choosing Core Data vs SwiftData, setting up the Core Data stack, modeling relationships, or implementing concurrency patterns - prevents thread-confinement errors and migration crashes

by CharlesWiltgen

Use when implementing widgets, Live Activities, or Control Center controls - enforces correct patterns for timeline management, data sharing, and extension lifecycle to prevent common crashes and memory issues

by CharlesWiltgen

Use when debugging connection timeouts, TLS handshake failures, data not arriving, connection drops, performance issues, or proxy/VPN interference - systematic Network.framework diagnostics with production crisis defense

by CharlesWiltgen

Use when Now Playing metadata doesn't appear on Lock Screen/Control Center, remote commands (play/pause/skip) don't respond, artwork is missing/wrong/flickering, or playback state is out of sync - provides systematic diagnosis, correct patterns, and professional push-back for audio/video apps on iOS 18+

by CharlesWiltgen

Use when app feels slow, memory grows over time, battery drains fast, or you want to profile proactively - decision trees to choose the right Instruments tool, deep workflows for Time Profiler/Allocations/Core Data, and pressure scenarios for misinterpreting results

by CharlesWiltgen

SQLiteData advanced patterns, @Selection column groups, single-table inheritance, recursive CTEs, database views, custom aggregates, TableAlias self-joins, JSON/string aggregation

by CharlesWiltgen

Use when debugging 'files disappeared', 'data missing after restart', 'backup too large', 'can't save file', 'file not found', 'storage full error', 'file inaccessible when locked' - systematic local file storage diagnostics

by CharlesWiltgen

Use when you see 'actor-isolated', 'Sendable', 'data race', '@MainActor' errors, or when asking 'why is this not thread safe', 'how do I use async/await', 'what is @MainActor for', 'my app is crashing with concurrency errors', 'how do I fix data races' - Swift 6 strict concurrency patterns with actor isolation and async/await

by CharlesWiltgen

subject not detected, hand pose missing landmarks, low confidence observations, Vision performance, coordinate conversion, VisionKit errors, observation nil, text not recognized, barcode not detected, DataScannerViewController not working, document scan issues

by CharlesWiltgen

Vision framework API, VNDetectHumanHandPoseRequest, VNDetectHumanBodyPoseRequest, person segmentation, face detection, VNImageRequestHandler, recognized points, joint landmarks, VNRecognizeTextRequest, VNDetectBarcodesRequest, DataScannerViewController, VNDocumentCameraViewController, RecognizeDocumentsRequest

by benchflow-ai

Train GPT-2 scale models (~124M parameters) efficiently on a single GPU. Covers GPT-124M architecture, FineWeb dataset loading, modern optimizers (Muon, AdamW), mixed precision training, and training loop implementation.

by benchflow-ai

Analyze user retention and churn using survival analysis, cohort analysis, and machine learning. Calculate retention rates, build survival curves, predict churn risk, and generate retention optimization strategies. Use when working with user subscription data, membership information, or when user mentions retention, churn, survival analysis, or customer lifetime value.

by benchflow-ai

Retrieve attractions by city from the bundled dataset. Use this skill when surfacing points of interest or building sightseeing suggestions for a destination.

by benchflow-ai

List cities for a given state using the bundled background data. Use this skill to validate state inputs or expand destination choices before flight/restaurant/attraction/driving/accommodation lookups.

by benchflow-ai

Retrieve restaurants by city from the bundled dataset. Use this skill when recommending places to eat or validating dining options for a destination.

by benchflow-ai

This skill should be used when working with SQL databases, "SELECT", "INSERT", "UPDATE", "DELETE", "CREATE TABLE", "JOIN", "INDEX", "EXPLAIN", transactions, or database migrations. Provides comprehensive SQL patterns across PostgreSQL, MySQL, and SQLite.

by benchflow-ai

Generate and optimize SQL queries for data retrieval and analysis

by benchflow-ai

Tools and techniques for detrending time series data in macroeconomic analysis. Use when working with economic time series that need to be decomposed into trend and cyclical components. Covers HP filter, log transformations for growth series, and correlation analysis of business cycles.

by ruvnet

Implement semantic vector search with AgentDB for intelligent document retrieval, similarity matching, and context-aware querying. Use when building RAG systems, semantic search engines, or intelligent knowledge bases.