1. Code and engineering — TOP10

The greatest value in this area comes not from installing a single “does-everything” mega-package, but from choosing a core workflow and adding a small number of specialist layers. A good engineering skill is more than a list of rules: it includes clear triggers, small steps, evidence of failure, actual test runs, and review/verification gates. All six tools on your list made the top 10; Compound Engineering and PR-Agent were added from outside the list, while ECC and wshobson moved over from other categories.

  1. Superpowers

    A software development plugin that combines planning, TDD, and subagent reviews

  2. Matt Pocock Skills ("Skills for real engineers")

    A small, composable engineering skill package for requirements, TDD, debugging, and code review

  3. Everything Claude Code (ECC)

    A comprehensive agent harness that brings together planning, testing, review, memory, and hooks

  4. Addy Osmani Agent Skills

    A 25-skill package that standardizes the software development cycle with quality gates

  5. Compound Engineering

    A plugin that structures the development cycle with 36 skills and preserves learnings in the repo

  6. OpenCodeReview

    An AI code review CLI that uses deterministic layers to control file coverage and line accuracy

  7. Ponytail

    A plugin that gets AI agents to reuse existing solutions and cut unnecessary code

  8. wshobson Agents

    A catalog of specialist agents, skills, and workflow plugins for seven coding tools

  9. PR-Agent

    An open-source AI tool for generating PR descriptions, code reviews, and improvement suggestions

  10. Andrej Karpathy Guidelines

    A single-file rule set that reduces incorrect assumptions and overengineering in coding agents