n8n expression syntax validation, context-aware testing, common pitfalls detection, and performance optimization. Use when validating n8n expressions and data transformations.
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Create interactive Sankey diagrams for flow visualization from CSV, DataFrame, or dict data. Supports node/link styling and HTML/PNG/SVG export.
Clustering Analysis
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Identify groups and patterns in data using k-means, hierarchical clustering, and DBSCAN for cluster discovery, customer segmentation, and unsupervised learning
Practical patterns for using fp-ts with React - hooks, state, forms, data fetching. Works with React 18/19, Next.js 14/15.
Time Series Analysis
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Analyze temporal data patterns including trends, seasonality, autocorrelation, and forecasting for time series decomposition, trend analysis, and forecasting models
Use CloudBase document database Web SDK to query, create, update, and delete data. Supports complex queries, pagination, aggregation, and geolocation queries.
hmdb-database
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Access Human Metabolome Database (220K+ metabolites). Search by name/ID/structure, retrieve chemical properties, biomarker data, NMR/MS spectra, pathways, for metabolomics and identification.
observable-notebooks
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Guide for creating Observable Notebooks 2.0, the open-source notebook system for interactive data visualization and exploration. Use this skill when creating, editing, or building Observable notebooks.
predict
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Forecast future states or outcomes based on current data and trends. Use when estimating future values, projecting trajectories, forecasting outcomes, or anticipating system behavior.
drugbank-search
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Search DrugBank comprehensive drug database with natural language queries. Drug mechanisms, interactions, and safety data powered by Valyu.
arxiv-search
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Search arXiv physics, math, and computer science preprints using natural language queries. Powered by Valyu semantic search.
armor-investigate
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Investigate data issues using lineage, intelligence, and history. Handles "why is this table stale", "what changed", "explain this alert", "root cause analysis", "debug this issue".
Expert in SQLite embedded database development for Tauri/desktop applications with focus on SQL injection prevention, migrations, FTS search, and secure data handling
Interact with the Dzaleka Online Services API to fetch community data (services, events, news, photos, jobs) or search across collections. Use when the user asks for community information or...
error-handling
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Implement typed error handling in Effect using Data.TaggedError, catchTag/catchTags, and recovery patterns. Use this skill when working with Effect error channels, handling expected failures, or...
substreams-dev
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Expert knowledge for developing, building, and debugging Substreams projects on any blockchain. Use when working with substreams.yaml manifests, Rust modules, protobuf schemas, or blockchain data...
Integrate external APIs and services with error handling, retry logic, and data transformation. Use when connecting to payment processors, messaging services, analytics platforms, or other...
Ensures state is intentionally designed with explicit invariants. Use when reviewing stateful code, designing data models, or refactoring boolean flag explosions. Prevents impossible states and...
Generate formatted expense reports from receipt data or CSV. Create professional PDF reports with categorization, totals, and approval workflows.
Comprehensive n8n workflow testing including execution lifecycle, node connection patterns, data flow validation, and error handling strategies. Use when testing n8n workflow automation applications.