Install guides
How to install Agent Skills in Claude, Codex, Gemini CLI, Cursor and Copilot
Where each tool looks for SKILL.md skills, the one command that works across tools, and a step-by-step page for each. Checked against each tool's own docs on 4 October 2026.
How to use a skill in ChatGPT or any chatbot (paste-in prompt)
Every skill in our free repo has a prompt.md you paste into a chat. No install, no skills support needed. What it can and cannot do.
How to install Agent Skills in claude.ai
How to upload a skill as a ZIP in claude.ai, and the setting that has to be on first. Checked against Anthropic's help centre on 4 October 2026.
How to install Agent Skills in Claude Code
Where Claude Code looks for skills, how to copy one in, and the npx command. Checked against the Claude Code docs on 4 October 2026.
How to install Agent Skills in Codex
The folders Codex reads skills from, the built-in installer, and how to add one by hand. Checked against OpenAI's Codex docs on 4 October 2026.
How to install Agent Skills in Cursor
The folders Cursor loads skills from, including the shared .agents/skills path, and how to add one. Checked against the Cursor docs on 4 October 2026.
How to install Agent Skills in Gemini CLI
Gemini CLI's skills folders, the gemini skills install command and the slash commands to check it worked. Checked against the Gemini CLI docs on 4 October 2026.
How to install Agent Skills in GitHub Copilot
Where GitHub Copilot looks for project and personal skills, and how to add ours. Checked against GitHub's docs on 4 October 2026.
Skills vs prompts vs custom GPTs: which one do you need?
What a skill, a prompt and a custom GPT each are, what each does well, and a short table to pick one. Facts checked against OpenAI's and other vendors' docs on 4 October 2026.
Shopify store owners
Chargeback response template for Shopify
A template to copy, the evidence that matters for each dispute reason, and Shopify's file rules. Built only from Shopify, Stripe and card network pages.
Can AI shopping agents read your return policy?
88% of the stores we checked had no shipping or return terms in product structured data. A five-minute check and three fixes.
Star ratings AI agents and Google can read
At 72% of the stores we checked, an agent reading the page had no rating to work from. A two-minute check and what to change.
How long should a product description be?
The typical description in our sample was 69 words. How to check your catalogue and the five facts to add to a thin description.
Freelancers and consultants
How to write a cold email from a prospect's website
A prompt that reads a prospect's public site and drafts a short cold email using only what the site says. Copy it, paste in the page text, check the facts.
How to reply to scope creep without burning the relationship
A way to answer a client's extra request: check it against what you agreed, then send a calm reply with a clear choice. Includes a prompt that drafts it from your own facts.
Marketers and agencies
How do I brief a page from what already ranks for my keyword?
A prompt that turns the pages currently ranking for a keyword into a content brief, the intent, what every page covers, the gaps and an outline. Copy it, paste the top results.
How do I write a Google Business Profile description and posts?
A prompt that drafts a Google Business Profile description, services, posts, questions and review requests from your own facts, following Google's rules. Copy it, paste in your facts, check each line.
How do I write a service page for a local business?
A prompt that writes a location and service page from the business's own facts, with a title, headings, FAQ and structured data, and marks every fact it does not have. Copy it, paste in the facts, check the page.
How to write ad copy variants you can actually test
Build a grid of ad variants that differ in one thing each, so a test tells you something. Includes a prompt that stays inside your real offer and the character limits.
Developers
How to check AI-written code before you launch it
A pre-launch checklist and a paste-in review prompt for code an AI assistant wrote. What to check by hand, what to ask the assistant, and what no review will catch.
How do I check that my README's setup steps actually work?
A prompt that follows a README like a newcomer and marks each setup step OK, BROKEN, MISSING or UNVERIFIED against your real files. Copy it, paste your files, fix the edits it lists.
How do I find which tests my change is missing?
A prompt that lists each behaviour a diff adds or changes, marks it Covered, Not covered or Unknown against your tests, and ranks the tests worth adding. Copy it, paste your diff and tests.
How do I check a repository for leaked secrets before I make it public?
A starter prompt and a few git commands to find committed keys, env files and tokens, sort real secrets from placeholders, and plan the clean-up in the right order. Copy it, run the commands, paste the masked output.
How do I check a web page for accessibility problems in its code?
A prompt that reads a page's HTML for the usual accessibility problems, shows the offending code and a fix, and lists what only a human can check. Copy it, paste your markup.
How do I check that my SKILL.md file will load in other tools?
A prompt that reads a SKILL.md file for strict-YAML errors, vendor-specific names and missing fallbacks, quoting the line behind each finding. Copy it, paste your file, or use the free script.
How do I judge the risk of a dependency upgrade before I merge it?
A starter prompt that sorts a dependency bump list by version change, quotes only the breaking changes in the release notes you paste, and gives an upgrade order and a rollback. Copy it, paste the bumps and notes.
How do I write a changelog from my git commits?
A prompt that turns a git log into a user-facing changelog section, with the commit behind every line and the vague commits flagged. Copy it, paste in your log, check the flagged ones.
How do I write a blameless postmortem after an outage?
A prompt that turns chat logs, alerts and a rough timeline into a blameless postmortem, with stated facts kept apart from guesses. Copy it, paste in your notes, check every time and number.
How do I write a pull request description reviewers can use?
A prompt that writes a pull request description from your diff, says what it could not know, and lists the questions a reviewer will probably ask. Copy it, paste the diff, fill in the gaps.
How to write a SKILL.md that still works when a tool is missing
Three fallback patterns for agent skills, with verbatim examples from free skills, and the study numbers on how rare fallbacks are.
Data and spreadsheets
How to clean a messy CSV export without losing data
Fix the usual problems in an exported CSV (encoding, delimiters, leading zeros, dates, duplicate headers) with a script you can read and rerun, plus a prompt that writes it.
How to clean a messy spreadsheet with an AI assistant
A safe routine for cleaning a messy CSV or sheet with an AI assistant: describe the mess, get a rule list, apply it to a copy, and check the totals before you trust it.
How do I check a CSV file before I use it?
A prompt that profiles a sample of a CSV, flags mixed types, odd dates, stray spaces and duplicates, and lists questions for whoever owns the data. Copy it, paste the header and sample rows.
How do I summarise survey results without overclaiming?
A prompt that turns a survey export into counts with the base size, themed open-text answers with quotes, and a plain list of what the data cannot show. Copy it, paste in your rows, check the counts.
Job seekers and careers
How do I build an interview scorecard from a job post?
A prompt that turns a job post into a structured interview scorecard with competencies, questions, a 1 to 4 rubric and an interview plan. Copy it, paste in the post, check it against the job.
How do I answer "tell me about a time when" using my own experience?
A starter prompt that builds a STAR outline and a spoken answer from your own notes without adding facts, and lists the follow-up questions to expect. Copy it, paste your question and notes.
How do I tell what a job post really asks for?
A prompt that sorts a job post into firm requirements, wishes and gaps, quotes the phrases worth a question and drafts questions for the recruiter. Copy it, paste the post.
How to rewrite resume bullets without inventing numbers
A prompt that tightens weak resume bullets using only facts you give it, and flags every place a number would help but you must supply the real one.
How do I write a cover letter from a job post without making things up?
A starter prompt that writes a short cover letter from a job post and your resume using only facts in your resume, and lists the requirements you do not yet show. Copy it, paste both.
Sales and outreach
How do I check a cold email before I send it?
A prompt that tests every claim in a cold email draft against the prospect's page, flags unproven claims about you and lists the commercial email basics a US guide expects. Copy it, paste your draft.
How do I follow up with a client who has gone quiet?
A prompt that turns the history of a stalled lead into four short follow-ups with falling pressure and an easy way to say no. Copy it, paste in the thread, check each message against the history.
How do I write a case study when I only have rough project notes?
A prompt that turns messy project notes and your real numbers into a one-page case study without inventing results, quotes or claims. Copy it, paste in your notes, check the fact sheet.
How do I write a quote for a job from my rate card?
A prompt that turns a job description and your own rates into an itemised quote with assumptions and exclusions, with the totals checked by arithmetic you can see. Copy it, paste in the job and your rates, check the sums.
Content and writing
How to fact-check the claims in an AI-written draft
A routine and a paste-in prompt that pull every checkable claim out of a draft, so you can verify each one against a source before you publish.
How do I edit a draft so it sounds like I wrote it?
A starter prompt that reads your own writing samples, describes your voice with quoted evidence, then edits a draft to match without changing facts. Copy it, paste your samples and draft.
How do I turn a long post into a thread and a summary?
A starter prompt that turns one long post into a summary, a numbered thread and a pull quote, using only what the post says and keeping caveats attached to their claims. Copy it, paste the post.
How do I write a newsletter issue from my notes?
A starter prompt that turns a week of notes and links into one newsletter issue, with every fact traced to a note and gaps marked. Copy it, paste your notes, check each claim.
How do I turn meeting notes into decisions and action items?
A starter prompt that sorts meeting notes into decisions, actions with owners, and open questions, quoting the notes for each line. Copy it, paste your notes, check each quote.
Finance and small-business admin
How do I check an invoice for mistakes before I send or pay it?
A prompt that recomputes every line and total of an invoice, lists differences, and shows which common fields are missing, without giving tax advice. Copy it, paste the invoice.
How do I sort a bank export into categories for my bookkeeping?
A starter prompt that groups a bank export by merchant, assigns categories only where the name is clear, and asks about the rest. Copy it, paste your rows, check the totals.
Customer support
How do I check a reply to an angry customer before I send it?
A prompt that checks a draft reply against the customer message and your policy, what it answered, what it promised, what is not backed, and where the tone slips. Copy it, paste the three parts.
How do I decide a refund request that falls outside my policy?
A starter prompt that lays your policy next to one refund request, counts the days, lists your options and drafts a reply without deciding for you. Copy it, paste the policy and the case.
How do I write support macros from my refund policy?
A starter prompt that reads your policy and a few real tickets, lists what the policy says and what it leaves out, and drafts replies with the policy line each one relies on. Copy it, paste your policy and tickets.
How do I turn a customer message into a bug report?
A starter prompt that turns a rambling customer message into a bug report for engineering, keeping what the customer said apart from guesses, and lists the questions to ask back. Copy it, paste the message.
How do I write a help article from support tickets?
A starter prompt that turns several tickets on the same problem into one help article, labels where each step came from and lists conflicts to settle. Copy it, paste the tickets.
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
Study figures in the Shopify guides come from our October 2026 study of 100 Shopify stores, 99 of them measurable. The sample was chosen by hand and is not random.