Data & Analytics

dmitryprg-ai Bundle

Analyze data, investigate datasets, debug with data, and explore system behavior. Use when analyzing, running SQL queries, data profiling, investigating patterns, building statistics, exploring CSV/JSON data, or debugging with data evidence.

a-evo-lab Skill

Reading, writing, and converting common data formats (CSV, Excel, JSON, YAML) with correct handling of encoding, types, and edge cases.

marsolab Bundle

Type-safe SQL access in Go with sqlc and goose migrations. ALWAYS use this skill when writing or reviewing Go database code — `sqlc.yaml` configuration, query annotations (`:one`, `:many`, `:exec`, `:execrows`), generated `Querier` interface for mocking, goose Up/Down migrations, transaction patterns with `BEginTx` and `db.WithTx`, `pgx`/`pgxpool` vs `database/sql`, `sql.ErrNoRows` handling, JSON columns, and testing the data layer. Pair with go-http for the service-handler-storage stack, go-errors for wrapping `sql.ErrNoRows`, and go-testing for `Querier` mocking.

marsolab Bundle

Production-grade SQLite for web, mobile, and CLI projects. Use this skill when designing schemas, tuning PRAGMAs (WAL, busy_timeout, mmap, optimize), modeling writer concurrency (single-writer pool, BEGIN IMMEDIATE, busy retry), building indexes (covering, partial, expression, STRICT, WITHOUT ROWID), paginating with keyset cursors, implementing job queues via `UPDATE ... RETURNING`, full-text search with FTS5 + sqlite-vec, replicating with Litestream / Turso / Cloudflare D1, picking a driver (better-sqlite3, modernc.org/sqlite, GRDB, Room, SQLDelight, expo-sqlite, SQLCipher), or running the 12-step `ALTER TABLE` rewrite. Pair with go-sql for sqlc + goose against SQLite, apple-dev for GRDB on iOS, and front-dev for in-browser SQLite via OPFS.

marsolab Bundle

Building HTTP services in Go with the Chi router and stdlib `net/http`. ALWAYS use this skill when writing or reviewing Go HTTP code — defining routes with `chi.Router`, middleware (`chi.Use`, `middleware.Logger`, `middleware.Recoverer`, `middleware.RequestID`), handler signatures, request decoding, JSON responses, status codes from typed errors, graceful shutdown with `http.Server.Shutdown`, `httptest` patterns, service project layout (`cmd/server`, `internal/handler`, `internal/service`), and timeouts (`ReadTimeout`, `WriteTimeout`, `IdleTimeout`). Pair with go-sql for the data layer, go-logging for request-scoped logging, go-errors for status code mapping, and go-testing for handler tests.

marsolab Bundle

Idiomatic Go style: naming, package and file organization, interfaces, documentation, generics, iterators, range-over-int, performance, dependency management, and common pitfalls. ALWAYS use this skill when writing or reviewing Go code for general style and idioms — questions about naming conventions, where to put a type, when to use generics vs `any`, how to size interfaces, godoc comments, the `internal/` package, struct literal initialization, slice/map gotchas, loop-variable capture, defer timing, or "is this idiomatic Go?". Pair with go-errors, go-concurrency, go-testing, go-logging, go-http, go-cli, go-sql, or go-lint when those concerns dominate the task.

marsolab Bundle

Idiomatic Go testing with the stdlib `testing` package and the go-testdeep assertion library. ALWAYS use this skill when writing or reviewing Go tests — table-driven tests with `map[string]testCase`, `t.Run` subtests, `t.Helper()` for assertion helpers, `t.Cleanup`, `t.Parallel`, integration test gating with environment variables, benchmarks (`testing.B`), fuzz tests, go-testdeep operators (`td.Cmp`, `td.CmpError`, `td.CmpNoError`, `td.Struct`, `td.Smuggle`, `td.Between`, `td.Re`, `td.Require`), and the third-party-frameworks debate (go-testdeep when deps are allowed, stdlib-only for dependency-free projects, never testify). Pair with go-sql for testing DB code with sqlc's `Querier` interface, go-http for `httptest` patterns, and go-concurrency for race-detector usage.

diversioteam Bundle

Implement or review Optimo Mixpanel events without regressing identity, tenant safety, producer ownership, privacy, or post-commit delivery. Use for Django optimo_analytics and its cross-channel callers.

utopiabenben Bundle

文档格式批量转换工具，支持 PDF、Word、Excel、PowerPoint、图片等多种格式之间的批量转换，预览模式和撤销功能！

snyk Bundle

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

reggiechan74 Bundle

This skill should be used when the user asks to "create a camp budget", "generate budget spreadsheet", "calculate camp costs", "compare camp prices", "optimize camp spending", "track camp expenses", "how much will camps cost", "budget for summer camps", "camp cost breakdown", or needs help analyzing, comparing, or managing camp-related expenses across children and time periods. Provides budget calculation tools and cost optimization strategies for Ontario families.

reggiechan74 Bundle

This skill should be used when the user asks to "generate annual schedule", "update annual schedule", "create year schedule", "rebuild schedule", "refresh schedule from spreadsheet", "create full-year view", "build annual camp plan", "consolidate all camp days", "combine summer and PA days", or needs to produce a consolidated annual schedule covering summer, PA days, winter break, and March break from spreadsheet data and school calendar. Generates both markdown and Excel output.

satoshistackalotto Bundle

Parses bank statements from all major Greek banks (Alpha, NBG, Eurobank, Piraeus). File-based CSV/Excel import with transaction reconciliation.

satoshistackalotto Bundle

Cross-client analytics for Greek accounting firms. Surfaces trends, anomalies, and risks across financial data. Read-only, outputs to /data/reports/.

danielpodolsky Skill

Reviews schema design, SQL queries, ORM patterns. Use when junior creates schema, writes queries, adds migrations, works with Prisma/MongoDB/PostgreSQL, or asks "is this SQL safe", "N+1", "index".

shining319 Bundle

Comprehensive database design tool creating complete schemas with tables, fields, indexes, and ER diagrams. Use when users request database design for any system. Generates Markdown docs, SQL scripts, and DrawDB-compatible JSON/DBML files. Supports MySQL, PostgreSQL, SQL Server. Triggers: database design, schema, ER diagram, SQL, data model. | 全面的数据库设计工具，创建完整的数据库架构。触发词：数据库设计、数据库架构、ER图、SQL、数据模型、表设计。

nimrodfisher Bundle

SQL query review for correctness, performance, and best practices. Activate when a query needs review before production use, shows unexpected results, or runs too slowly.

theagentledger Bundle

Build, test, and automate multi-step email campaigns with conversion tracking. Templates for onboarding, nurture, product launch, re-engagement. Integrate with CRM, financial-tracker, and analytics.

nimrodfisher Bundle

Time-based cohort analysis with retention and behaviour tracking. Activate when you need to measure how groups of users/customers behave over time — retention rates, revenue by cohort, or feature adoption curves.

nimrodfisher Bundle

Translate SQL queries into plain language business logic. Use when documenting queries, explaining analysis to non-technical stakeholders, code reviewing for correctness, or building a query catalog.

nimrodfisher Bundle

Standard business metric calculation with industry benchmarks. Use when calculating SaaS metrics (MRR, churn, LTV, CAC), e-commerce KPIs, or product analytics metrics with proper definitions.

lastdays03 Bundle

Python 생태계(Jupyter, Pandas, Scikit-learn)를 활용하여 데이터에서 심층적인 인사이트를 도출하는 전문 분석 워크플로우입니다.

gabrielkoerich Bundle

Analyze Beancount ledgers with reusable CLI reports and question-driven queries. Use when user asks for last month/last 12 months reports, spending breakdowns, savings trends, or direct finance questions from a .bean ledger.

frdel Skill

Create, open or edit Calc spreadsheets: ODS default; XLSX for Excel compatibility.

fmschulz Bundle

Search PMC Open Access and bioRxiv corpora with polars-dovmed. Use when structured, reproducible literature queries should run through the hosted API or local parquet indexes.

fmschulz Bundle

Add schema-backed metadata validation, normalized Parquet tables, and a DuckDB catalog to a bioinformatics project. Use when an analysis needs LinkML/Pydantic records or a queryable data catalog.

wayfinderfoundation Bundle

How to use the Aerodrome Slipstream adapter on Base for deployment-aware concentrated-liquidity reads, range analytics, position lifecycle actions, gauge staking, and shared veAERO helpers.

besync-labs Skill

Pull request lifecycle domain knowledge — branch strategy detection, PR size classification, confidence-scored review, git-aware context, PR analytics, dependency management, and split/merge/describe operations.

timwukp Bundle

Designs normalized database schemas with migration scripts, indexing strategies, and relationship handling. Supports SQL, Flyway, Liquibase, and Prisma. Triggers on: "design database", "create schema", "database migration", "design tables".

ahmedkhaledmohamed Skill

Data exploration and analysis partner for Product Managers. Use when the user needs to query databases, analyze metrics, create dashboards, or extract insights from data. Triggers include "query", "analyze data", "metrics", "BigQuery", "SQL", "dashboard", "what does the data say", or when working with quantitative information.

display-design-studio Bundle

Answer a merchant's **analytics and reporting** questions with **ShopifyQL** — Shopify's query language for aggregated store metrics that the Admin GraphQL API cannot compute. Choose this (not `admin`) whenever the ask is for **numbers, totals, trends, or breakdowns** rather than fetching or mutating individual records: including but not limited to total/gross/net sales and revenue, order counts, average order value, refunds, quantity sold, sessions, conversion rate, and traffic — sliced by product, channel, region, or customer, trended over time, or compared period-over-period. Examples: "total sales last 7 days", "orders by sales channel this month", "top products by revenue", "conversion rate this week", "sales this year vs last year". This topic covers writing the ShopifyQL query; if the merchant wants to run it against their store, execution is handed off to `use-shopify-cli`. Not for general Admin GraphQL record operations — fetching or mutating individual resources (use `admin`).

rhein1 Bundle

Convert a local Word, PowerPoint, spreadsheet, OpenDocument, RTF, EPUB, CSV, or text-based PDF into bounded Markdown and an Agoragentic evidence handoff. Use when an agent needs document contents plus runtime-verified provenance, explicit evidence coverage, known-loss warnings, and a pending-or-incomplete parse receipt without intentionally uploading the file.

tomgranot Skill

Create business segment lists in HubSpot for customers, partners, competitors, employees, ICP tiers, and industries. Enables segment-based targeting, suppression, and analytics.

tomgranot Bundle

Build workflows to automate contact progression through the sales funnel: Lead to MQL to SQL to Opportunity to Customer. Each transition is triggered by a specific event (score threshold, meeting booked, deal created, deal won).

oabdelmaksoud Bundle

Create and manage datasets on Hugging Face Hub. Supports initializing repos, defining configs/system prompts, streaming row updates, and SQL-based dataset querying/transformation. Designed to work alongside HF MCP server for comprehensive dataset workflows.

lawless-m Skill

Use when asked "why isn't <record> in this query result", to trace a row through joins, or to decompose WHERE/JOIN-heavy SQL into per-step pass/fail attribution — generates ScryQL rules.pl + queries.sql.