Przemysław Zalewski

Agent skills

Skills for your coding agent

Free and open source, MIT. They run in Claude Code, Codex and any agent that reads Agent Skills. I use them myself.

Install ↓ GitHub

Przemysław Zalewski

Skills

/przemo Przemo

Przemo in your terminal. Reviews code the way I do, answers the hard calls you would take to a senior, does the task (reads the code, runs the tests, fixes the bug) and talks the way I write on Slack: short, dry, harsh on tools, warm to people. Answers at 2 AM too.

  • Review: a one-line verdict, then blockers, worth-fixing and nits, each with file:line, the reason and the fix. Zero sycophancy.
  • Hard calls: one recommendation, the reason that decides it, the alternative and the first step.
  • Polish by default, English when you write in English.
  • Success criterion first, root cause before the fix, a test that reproduces the bug.
  • Checks its own output before it says done. Code and commits stay professional, the jokes stay in the chat.
  • Strong humor: deadpan, Polish movie quotes, suchary. Black humor and politics only when you ask.

Try:

Claude Code
/przemo review this branch

Source · .skill file · The web version: Flack

/business-idea-validator Business idea validator

Scores a business idea on ten rubrics, from 1 to 5, with quoted evidence and a confidence level, and applies a fixed verdict rule: Build, Validate first, Pivot or Stop.

  • The riskiest assumption and up to three experiments with pass and fail numbers.
  • Markdown and JSON, in English or Polish.
  • The verdict rule is code, so you can check it by hand.

Try:

Claude Code
/business-idea-validator A booking app for dog groomers, 19 EUR a month

Source · .skill file · Run it online

Install

Claude Code

Add the marketplace once, then install the pack. Every skill below comes with it.

in a Claude Code session
/plugin marketplace add Ciunkos/skills
/plugin install ciunkos@ciunkos

Codex and other agents

Clone the repository and copy or symlink a skill folder into the folder your agent loads skills from.

terminal
git clone https://github.com/Ciunkos/skills ~/ciunkos-skills
mkdir -p ~/.codex/skills
ln -s ~/ciunkos-skills/skills/przemo ~/.codex/skills/przemo

Update

Claude Code: these two commands inside a session, no restart. Or turn on auto-update in /plugin, Marketplaces, ciunkos. Codex: pull the clone. claude.ai: upload the new .skill file in place of the old one.

Claude Code
/plugin marketplace update ciunkos
/reload-plugins
Codex
git -C ~/ciunkos-skills pull

GitHub · Releases and changes

FAQ

Questions

Are they free?
Yes. MIT license, source on GitHub. You pay only for your own agent plan or API usage.
Do they send my code anywhere?
No. A skill is instructions and a few local scripts. Nothing in the repository calls a network or runs on its own.
Is /przemo really you?
No. It is my voice and my habits in a skill. It knows only public facts about me and nothing about clients or employers. If you want the real one, book a call.
Can you build a skill for my team?
Yes. Skills, rules and guardrails for coding agents are part of my AI consulting.

Let’s find out in 30 minutes

A free 30-minute call. You bring the problem, I bring questions. Want a number first? The configurator shows hours, a price range and the start date.

If I am the wrong person I will say so on the call and point you to someone better.

Book a free 30-min call Email me instead

or write to ciunkos@gmail.com

After you book: a calendar invite, then the call, then the scope in writing within 24 hours. Nothing else to fill in.

My pledge

  • Reply within 24 hours. I reply within 24 hours on working days, personally, not a bot. Weekend messages: by Monday noon.
  • Late means free. If I am late, the first hour of work is free. You do not have to ask.
  • Scope in writing within 24 hours. A free 30-minute call with no company deck, then the scope and the price in writing within 24 hours. You decide.
  • The person who does the work. You talk to the person who does the work. No sales layer, no handoff.
  • Follow-up only with news. I follow up only when I have something new for you. Never a "did you see my offer".
  • Honest "not a fit". If I am not the right person, I say so on the call and point you to someone who is.

Calls this week · work starts 2 November 2026 · B2B contract or employment · Wrocław, Poland (CET), remote