All 21 free skills
One from each category in turn. Open any card for the before and after.
Review Reply Drafter
A reply for every review, matched to its tone, with the risky ones flagged for you.
Tested on 3 real public review sets (Judge.me and Trustpilot).
Late Payment Chaser (UK)
One unpaid invoice in. The statutory interest and fixed recovery sum worked out with a script, and three reminder emails out. UK business debts only.
3 real tests built on the facts of published UK court judgments.
Search Intent Page Brief
Give it a keyword and the pages that rank. Get the search intent, a coverage table, the gaps and an outline. Free, MIT-licensed.
1 real-data run on three public how-to pages (Claude Sonnet).
Test Gap Finder
Give it a diff and the tests. Get each behaviour the change adds marked Covered, Not covered or Unknown, and ranked test cases for the gaps.
1 real-data run on a public multi-hunk change in the Express repository (Claude Sonnet).
CSV Profile and Sanity Check
Give it a CSV. Get a read-only profile of every column, flags and questions for the data's owner. Free, MIT-licensed.
1 run on a real public CSV (Claude Sonnet) with the script.
Job Post Decoder
Paste a job post. Get what the job is, firm and wish requirements, what is missing and questions for the recruiter. Free, MIT-licensed.
1 run on a real public job post (Claude Sonnet).
Cold Email Checker
Give it a cold email draft and the prospect's page text. Get a verdict, a claims table and a tightened version. Free, MIT-licensed.
1 run on a draft we wrote with common flaws and text from a real public homepage (Claude Sonnet).
Fact-Claim Checker
Paste a draft before you publish. Get the claims that need a source, ranked by risk, what would settle each, and safer wording for the ones you cannot back up.
1 real-data run on a public launch post (Claude Sonnet).
Invoice Checker
Give it an invoice. Get the totals recomputed, every difference, missing fields and consistency flags. No tax advice. Free, MIT-licensed.
1 run on a sample invoice we wrote with planted errors (Claude Sonnet).
Angry Customer Reply Check
Give it the complaint, your draft reply and your policy. Get a check of promises, facts and tone, and a repaired draft. Free, MIT-licensed.
1 run on a complaint, draft and policy we wrote (Claude Sonnet).
Product Title Cleaner
One consistent title pattern across the catalogue, as an import CSV of changed rows only.
Tested on 3 real public Shopify catalogues, up to 490 products.
AI Search Readiness Check
Can ChatGPT, Perplexity and Google read a website? A score out of 100 from 8 checks, the evidence and the fixes in order.
Tested on 8 real public websites, as a skill and (four of them) as a pasted prompt, two also on a second model, then re-scored after two independent reviews.
Skill Portability Check
A free checker for SKILL.md folders: strict-YAML trap, portable keys, vendor tool names, missing fallbacks, broken links. One Python file, exit code for CI.
Run over our own 57 skills and its four fixtures (5 checks pass).
Policy Checker
Policy gaps and contradictions across refund, shipping, privacy and terms, with fixes to paste.
Tested on 4 real public Shopify stores.
README First-Run Check
Point it at a repo. It follows the README like a new user and checks every step against the repo: OK, BROKEN, MISSING or UNVERIFIED, with evidence and the README edits that fix it.
1 real-data run on a public MDN tutorial repository (Claude Sonnet).
Chargeback Evidence Checklist
Got a chargeback? The evidence to gather for your dispute reason, what you already have, and where to find each piece in Shopify.
Tested on 6 real disputes from the Shopify Community forum.
PR Description and Review Prep
Run it on your branch. Get a PR title, summary, risk notes and test plan from the diff, plus the questions a reviewer will ask. Free, MIT-licensed.
1 real-data run on four public commits (Claude Sonnet).
Alt Text Writer
Alt text for every product image, written while looking at the photo, as an import CSV.
Tested on 6 real cases from public Shopify stores, including three product export CSVs.
Changelog from Commits
Give it a commit range or a pasted git log. Get a user-facing changelog with the commit behind every line, and the vague commits flagged.
1 real-data run on the public Express repository (Claude Sonnet, 15 commits).
Agent-Ready Quick Check
Six checks on how AI shopping agents read your store, compared with 99 stores we audited.
Tested on 4 real public Shopify stores.
Accessibility Quick Audit
Give it a page's HTML or components. Get accessibility issues ranked by impact, with the WCAG criterion, the code and a fix. Free, MIT-licensed.
1 real-data run on a public demo page built with known accessibility faults (Claude Sonnet).
Follow for new free skills
New free skills and guides appear in all of these as we publish them. Pick whichever you already use.
- RSS feed for any feed reader
- Watch the free skills repo on GitHub
- Follow on Gumroad
How to install
Install every free skill with npx skills add proskillpacks/skills, or copy just the folders you want. Step by step for each tool: how to install Agent Skills.
- Unzip the download. It holds one folder per skill, a README and the licence.
- Put each skill folder where your assistant looks for skills. The generic path is
.agents/skills/(ornpx skills addfrom a folder). Tool-specific paths:- Claude Code:
~/.claude/skills/(or.claude/skills/inside one project) - OpenAI Codex, Gemini CLI, Cursor and others:
.agents/skills/or the skills folder their docs name - claude.ai: zip the skill folder yourself, then Customize, Skills, the plus button, Create skill, Upload a skill (code execution must be on in Settings, Capabilities)
- ChatGPT or any chatbot: open the skill's
prompt.md, paste it into the chat, then paste your own text or link - Steps for each tool, with links to its official docs: how to install Agent Skills
- Claude Code:
- Ask for the job in plain words. The skill loads by itself.