Fewer subscriptions.
More vibe-coding.

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

selfoss

Project2.5K

A self-hosted web reader for gathering updates from websites and other platforms.

Added 2026-10-07
Replaces
GitHub

What you can build

  • Build a tool that takes two OPML files, removes repeated subscriptions, and outputs one combined OPML file for selfoss import.
  • Build a comparer that takes two OPML snapshots and produces a report of subscriptions added or removed between them.
  • Build a labeling tool that takes one OPML file and user-assigned topics, then outputs a separate importable OPML file for each topic.
  • Build a review tool that takes an OPML file and keep-or-archive decisions, then outputs a pruned OPML file and a record of archived subscriptions.
  • Build a form for pasted story titles, URLs, and notes copied by the reader; transform those inputs into a weekly Markdown brief without automatic selfoss access.

Try this prompt

Build a small OPML list-merging tool for selfoss users. Accept two user-selected OPML files, identify repeated subscriptions, and produce one merged OPML file that can be uploaded through selfoss's documented import page. Show which entries were combined, preserve the original input files, and let the user review the result before saving. Do not assume a selfoss content API or add automatic synchronization.

Get started

  1. Get the application

    Choose a stable release from the repository's Releases page and copy its files, including hidden .htaccess files, into a PHP server document root.

  2. Set up storage and database

    Make data/cache, data/favicons, data/logs, data/thumbnails, and data/sqlite writable. Configure database access in config.ini; the README says SQLite needs no database-setting changes.

  3. Arrange feed updates

    Set up a cron job or systemd timer to call the documented /update URL, or use cliupdate.php. Import an OPML file through the application's /opml page.

License & notes

GPL-3.0GPL-3.0-or-later, with some source parts GPL-3.0-only; the README says the bundled-dependency package might also be GPL-3.0-only. Commercial use is allowed. If you convey modified covered work, GPL source, notice, and license obligations apply. Private modification without conveying is permitted; network interaction alone is not conveying. Hosting and server costs depend on your setup; no paid model or API costs are documented.

  • Requires a PHP server, writable data directories, and operator-managed feed update scheduling.
  • The README documents OPML import but does not establish a general content export API or automatic sync for companion tools.
  • The manual reading brief requires users to copy story details themselves; it is not connected to selfoss.
  • When conveying modified covered work, GPL obligations apply; the README notes some parts may be GPL-3.0-only.

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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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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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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