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Open-source tools & agent skills to build the things you’re paying for.

Matomo

Project21.9K

Self-hosted web analytics for collecting and analyzing website data on your own server.

Added 2026-10-07
Replaces
GitHub

What you can build

  • Build a tool that takes manually compiled campaign names and counts, applies an editable alias map, and outputs a normalized campaign table while retaining original names.
  • Build a script that takes manually compiled campaign statistics for two periods, calculates per-campaign changes, and writes a ranked variance report.
  • Build a utility that takes Matomo ecommerce totals and a separate order-ledger CSV, matches entries by date, and outputs unmatched rows and total discrepancies.
  • Build a report generator that takes manually compiled goal statistics from two date ranges, calculates changes, and outputs goals ranked by absolute change.
  • Build a checker that takes manually compiled daily visit counts and a configurable historical window, flags outliers, and outputs dates and observed values for review.

Try this prompt

Build a small local campaign-name normalization tool. Accept a CSV of campaign names and counts that a user manually compiles from Matomo reports, plus an editable CSV alias map. Preserve the raw input, map aliases to canonical names, aggregate counts by canonical name, and write both a normalized CSV and a list of unmapped names. Document the expected columns and assumptions, handle malformed rows visibly, and do not claim a Matomo API integration or discard source values.

Get started

  1. Check server requirements

    Plan for PHP 8.1 or greater and MySQL 8.0 or greater, or MariaDB 10.6 or greater; see the official requirements documentation at https://matomo.org/docs/requirements/.

  2. Install Matomo

    Download Matomo, upload it to your webserver, open its directory in a browser, and follow the installation steps at https://matomo.org/docs/installation/.

  3. Track a website

    After installation, add the JavaScript tracking code Matomo provides to the website you want to measure, then review the resulting reports.

License & notes

GPL-3.0Matomo is GPL-3.0-or-later software and can be run on your own server. Hosting, database capacity, maintenance, and operations may incur costs; no dollar amounts are supplied. The README also identifies Matomo Cloud as a separate service and mentions a 21-day trial, but supplies no current pricing. No model or paid API is required by the documented core workflow. Commercial use is permitted under GPL terms. Private modification and internal use alone do not require publishing source; conveying modified copies triggers applicable GPL obligations, including source and license requirements.

  • The README does not document specific Analytics API methods or data shapes; the proposed companion workflows use manually compiled report data.
  • Self-hosting requires compatible PHP and MySQL or MariaDB, plus ongoing hosting and operations.
  • Useful site analytics require installing Matomo and adding its tracking code; the repository does not supply your website data.
  • GPL-3.0-or-later applies. Conveying modified copies carries license and source obligations; private internal use alone does not require publishing modifications.

Systematic Debugging

Agent skill296.2K

Investigates bugs, test failures, production incidents, performance problems, and build errors through root-cause investigation before proposing fixes, followed by pattern analysis, hypothesis testing, and verification.

Added 2026-10-07
Works with
Claude Code, Codex +5
GitHub

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code-review

Agent skill279K

Reviews code changes against both repository standards and the originating task specification, using parallel focused review passes.

Added 2026-10-07
Works with
Claude Code, Other hosts
GitHub

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accessibility

Agent skill274.6K

A cross-platform accessibility skill for auditing and implementing WCAG 2.2 AA patterns on web, iOS, and Android interfaces.

Added 2026-10-07
Works with
Claude Code, Codex
GitHub

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azure-pipelines

Agent skill193.6K

Project-specific procedures for queueing VS Code Azure DevOps builds, checking status and logs, and iterating on failures.

Added 2026-10-07
Works with
GitHub Copilot
GitHub

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Ollama

Project182.4K

Run open models on your machine and connect them to applications through a REST API.

Added 2026-10-07
Replaces
GitHub

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QA and Bug Fixing

Agent skill135.6K

Runs a tiered quality check for browser, API, CLI, background job, worker, and webhook behavior. Quick, Standard, and Exhaustive modes let a team choose severity coverage, while the workflow expects verified fixes and clear outcomes rather than a checklist alone.

Added 2026-10-07
Works with
Claude Code with gstack tools
GitHub

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ui-ux-pro-max

Agent skill133.7K

Design reference system provides searchable UI styles, palettes, typography, charts and stack-specific implementation guidance.

Added 2026-10-07
Works with
Claude Code, Cursor +2
GitHub

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shadcn

Agent skill125.2K

Manages shadcn/ui components and projects by adding, searching, styling, debugging, and composing registry components.

Added 2026-10-07
Works with
Agent Skills-compatible hosts
GitHub

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Browser Use

Agent skill117.4K

Guides an agent using Browser Use for interactive browser automation, scraping, screenshots, testing, and site work through Chrome’s CDP, with explicit choices between local Chrome and remote browsers.

Added 2026-10-07
Works with
Codex
GitHub

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D3

Project113.8K

A low-level JavaScript toolkit for custom, data-driven graphics in SVG, Canvas, and HTML.

Added 2026-10-07
Replaces
GitHub

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Supabase

Project111.2K

Build Postgres-backed apps with authentication, APIs, realtime, storage, and functions.

Added 2026-10-07
Replaces
GitHub

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Whisper

Project110.1K

Build speech transcription, language identification, and translation workflows with an open-source model.

Added 2026-10-07
Replaces
GitHub

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FastAPI

Agent skill102.9K

Applies FastAPI conventions to API work involving Pydantic models, dependency injection, streaming, routing, response models, observability, and serving built frontend assets. Its quick reference routes tasks to focused documentation, helping agents use framework-native patterns rather than inventing them.

Added 2026-10-07
Format
SKILL.md
GitHub

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API and interface design

Agent skill102.3K

A detailed engineering workflow for designing stable APIs and module boundaries, with attention to backward compatibility, contracts, validation, and consumer expectations.

Added 2026-10-07
Works with
Claude Code, Cursor +3
GitHub

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Ecommerce Image Workflow

Agent skill99.8K

Creates a three-image ecommerce set from an uploaded product photo: a clean main packshot, a feature image, and a lifestyle scene. It locks product identity details before prompting, then records the inputs, aspect ratios, outputs, and fidelity notes in a manifest with an HTML preview gallery.

Added 2026-10-07
Works with
Claude Code (repository positioning; skill uses image-generation capability)
GitHub

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Playwright

Project97.2K

Build cross-browser end-to-end tests and browser automation scripts with one API.

Added 2026-10-07
Replaces
GitHub

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Puppeteer

Project95.7K

Build JavaScript workflows that control Chrome or Firefox.

Added 2026-10-07
Replaces
GitHub

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design-taste-frontend

Agent skill93.3K

A design-direction skill for landing pages and portfolios that guides brief interpretation, audit-first redesigns, and visual refinement.

Added 2026-10-07
Works with
Codex, Cursor +1
GitHub

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Uptime Kuma

Project92.2K

Self-hosted checks for websites, network services, DNS, containers, and push monitors.

Added 2026-10-07
Replaces
GitHub

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PaddleOCR

Project90.7K

Build OCR and document-parsing workflows that turn images and PDFs into structured data.

Added 2026-10-07
Replaces
GitHub

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Mermaid

Project90.6K

Create editable diagrams from Markdown-inspired text for documentation and JavaScript applications.

Added 2026-10-07
Replaces
GitHub

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Syncthing

Project89.2K

Synchronize files between two or more computers, then adapt local workflows around those folders.

Added 2026-10-07
Replaces
GitHub

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Open guide

frontend-design

Agent skill83.5K

Frontend design guidance for producing distinctive production web interfaces rather than generic component layouts.

Added 2026-10-07
Works with
Claude Code, Codex
GitHub

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Netdata

Project80.8K

Open-source, real-time infrastructure monitoring with per-second metrics, anomaly detection, and alerting.

Added 2026-10-07
Replaces
GitHub

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Hoppscotch

Project80.6K

Develop APIs with reusable requests, collections, environments, and response tests.

Added 2026-10-07
Replaces
GitHub

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A product-specific review process for assessing Archify issues, pull requests, and code against user value, engineering cost, and expected impact.

Added 2026-10-07
Works with
Claude Code, Codex
GitHub

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Impeccable

Agent skill78K

Improves browser-rendered interfaces through separate design modes for audit, critique, polish, clarify, adapt, animate, and harden, with guidance on visual hierarchy, layout, typography, and implementation quality.

Added 2026-10-07
Works with
Claude Code, Codex +1
GitHub

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Grafana

Project77.1K

Query, visualize, and alert on telemetry across data sources.

Added 2026-10-07
Replaces
GitHub

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Tesseract OCR

Project76.8K

An open-source OCR engine for extracting text from images and building document workflows.

Added 2026-10-07
Replaces
GitHub

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Apache Superset

Project75.1K

Explore SQL data, build visualizations, and create dashboards with an extensible open-source BI platform.

Added 2026-10-07
Replaces
GitHub

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Creates and optimizes GitHub Actions pipelines with a constrained agent profile that limits file scope and operation budget and requires approval for production deployment, secret changes, and permission modifications.

Added 2026-10-07
Works with
Claude Code, Codex
GitHub

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career-ops

Agent skill73.7K

A local-first job-search command center routes across workflows for evaluating roles, tailoring CVs and tracking applications.

Added 2026-10-07
Works with
Claude Code, Codex +1
GitHub

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reveal.js

Project72.4K

An open-source HTML presentation framework for building browser-based slide decks.

Added 2026-10-07
Replaces
GitHub

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Vaultwarden

Project68.6K

Self-hosted Bitwarden-compatible server for personal and organization password vaults.

Added 2026-10-07
Replaces
GitHub

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Docling

Project68.5K

Convert diverse documents and media into structured content for tools you build.

Added 2026-10-07
Replaces
GitHub

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Apache ECharts

Project67.5K

Build interactive, customizable charts for browser applications.

Added 2026-10-07
Replaces
GitHub

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Tests authorized REST, GraphQL, or gRPC APIs for OWASP API risks such as object-level authorization, excessive data exposure, function authorization, SSRF, and injection, then validates findings with request evidence.

Added 2026-10-07
Works with
Agent Skills-compatible coding agents (host list not explicit in pinned files).
GitHub

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Open guide

AnythingLLM

Project66.8K

Build a desktop or self-hosted AI workspace for document chat, agents, and recurring tasks.

Added 2026-10-07
Replaces
GitHub

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Docusaurus

Project66.4K

Build and customize websites for project documentation, blogs, and support pages.

Added 2026-10-07
Replaces
GitHub

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Prometheus

Project66.4K

Collect, query and alert on metrics from your services and systems.

Added 2026-10-07
Replaces
GitHub

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