Agent Toolkit

Reusable agent skills, rules, prompts, and workflows for AI-assisted development as used at Jung von Matt TECH.

Quick Start

Install all skills with the skills CLI — works with Claude Code, Cursor, Copilot, Codex, Cline, and more:

npx skills add jungvonmatt/agent-toolkit              # install all skills
npx skills add jungvonmatt/agent-toolkit --list        # browse before installing

Or grab individual skills:

npx skills add jungvonmatt/agent-toolkit --skill start-ticket
npx skills add jungvonmatt/agent-toolkit --skill pr-description
npx skills add jungvonmatt/agent-toolkit --skill pr-review
npx skills add jungvonmatt/agent-toolkit --skill scheduled-pr-review

All skills are namespaced under jvm-skills to avoid conflicts with other skill packs.

Manual install: Clone the repo and run ./sync-skills.sh to copy skills into ~/.agents/skills/.

Native Plugin Install

Install via the plugin marketplaces if your team does not use Node/npm locally.

Claude Code

claude plugin marketplace add jungvonmatt/agent-toolkit
claude plugin install jvm-skills@jvm-skills

If your environment has no GitHub SSH keys, force HTTPS cloning:

export CLAUDE_CODE_PLUGIN_PREFER_HTTPS=1
claude plugin marketplace add jungvonmatt/agent-toolkit
claude plugin install jvm-skills@jvm-skills

Codex CLI

codex plugin marketplace add jungvonmatt/agent-toolkit
codex plugin add jvm-skills@jvm-skills

Skills

Skill	Description
write-ticket	Turns a raw idea, bug report, or feature request into a development-ready ticket — acts as a product coach that finds weak spots, refines requirements with the author, and publishes directly to Jira, GitHub, GitLab, Linear, or Asana.
start-ticket	Turns a ticket (Jira, Asana, Linear, GitHub/GitLab Issues) into a ready-to-execute implementation plan — fetches the ticket, pulls design specs, explores the codebase, pressure-tests the requirement, and writes a plan.
implement	Executes a start-ticket plan task-by-task — builds, tests, and verifies each vertical slice, then pauses for a human to review the working-tree diff before every commit. Add auto to run the whole plan in one approved pass.
pr-description	Generates a concise PR/MR description in Simplified Technical English from the current branch diff — auto-captures screenshots when UI changes are detected.
pr-review	Comprehensive pull request review against a configurable target branch with severity-ranked findings, Jira traceability, accessibility checks, and performance analysis.
scheduled-pr-review	Runs one unattended first-pass review over all open PRs/MRs from a scheduled task — reviews the full PR in every round but, after round 1, posts minor findings only where the PR changed since the last round. Reviews trusted PRs in a worktree with the project's env files, uses CI results before running checks, and keeps its state per project.
writing-tests	Auto-invokes when authoring tests — enforces behavior-first, mutation-sensitive tests that query by ARIA role or data-testid, never by class name, and cover atomic units first.
technical-writing	Auto-invokes when writing comments, doc comments, documentation, or blog posts — clean-code comments that say why, one Diátaxis mode per doc page, Simplified Technical English prose, and a cut test that deletes every sentence the reader does not need.
repo-diagnostics	Git-based diagnostics that reveal churn hotspots, bus factor, bug clustering, commit velocity, and crisis patterns — before reading any code.
jvm-design	Bootstraps a project with the Jung von Matt CI 2026 design system by copying DESIGN.md, brand assets, and fonts into the project root.
design-md	Reverse-engineers a design system from any source (Figma, live website, screenshot, or tokens) into a spec-compliant DESIGN.md with tiered tokens.

Commands (Claude Code)

Command	Description
/jvm-skills:write-ticket	Turn a raw idea into a development-ready ticket
/jvm-skills:start-ticket	Fetch a ticket and produce a ready-to-execute plan
/jvm-skills:implement	Execute a plan task-by-task, reviewing the working-tree diff before each commit
/jvm-skills:pr-description	Generate a PR/MR description from the current branch
/jvm-skills:pr-review	Review the current PR/MR for merge readiness
/jvm-skills:scheduled-pr-review	Run one scheduled first-pass review over all open PRs/MRs
/jvm-skills:repo-diagnostics	Run git-based repository diagnostics
/jvm-skills:jvm-design	Bootstrap the JvM CI 2026 design system into a project
/jvm-skills:design-md	Reverse-engineer a DESIGN.md from any design source

Companion Skills

Some skills route to companion skills from external sources. They degrade gracefully — they still work without them, loading only the companions present in the workspace.

# General-purpose skills (planning, spec-driven-development, security, performance …)
npx skills add addyosmani/agent-skills

# Chrome DevTools skills (a11y-debugging, network, performance traces …)
npx skills add ChromeDevTools/chrome-devtools-mcp

# Web performance skills (Core Web Vitals, loading, interaction, media …)
npx skills add nucliweb/webperf-snippets

# Alignment skills (grilling, domain modeling …)
npx skills add mattpocock/skills

start-ticket routes to planning-and-task-breakdown, and conditionally to spec-driven-development, doubt-driven-development, interview-me, security-and-hardening, and performance-optimization from addyosmani/agent-skills. Its stress-test step uses grill-with-docs (fallback: grilling) from mattpocock/skills when present.

Recommended Third-Party Sources

We don't try to cover everything ourselves. These are the skill packs and MCP servers we rely on across our projects — though not every project uses all of them. We pick what fits the stack and the task. Some of our skills reference companions from these packs but work fine without them.

Skills

Repository	Description	Classification
addyosmani/agent-skills	Full-lifecycle engineering skills from spec to ship.	Engineering
mattpocock/skills	Alignment-first workflow with grilling, domain modeling, and TDD.	Engineering
obra/superpowers	Development methodology with subagent orchestration and git worktrees.	Methodology
GoogleChrome/modern-web-guidance	Modern web platform features and best practices by the Chrome and Edge teams.	Web Platform
nucliweb/webperf-snippets	DevTools snippets for measuring and debugging Core Web Vitals.	Performance
vercel-labs/agent-skills	React/Next.js performance, Vercel deployment, and the npx skills CLI.	React, Vercel
antfu/skills	Auto-generated skills for the Vue/Vite ecosystem.	Vue, Tooling

MCP Servers

Server	Repository	Description
Chrome DevTools	ChromeDevTools/chrome-devtools-mcp	Browser automation, performance traces, Lighthouse audits, and screenshots.
Atlassian	sooperset/mcp-atlassian	Jira and Confluence access for Cloud and Server/Data Center.
GitHub	github/github-mcp-server	Official GitHub MCP server for repos, issues, PRs, and code search.
Figma	GLips/Figma-Context-MCP	Figma design data and image downloads for one-shot implementation.
Context7	upstash/context7	Up-to-date, version-specific library documentation as context for coding agents.

Contributing

Contributions welcome! See Contributing Guide for guidelines.