Trademarks of their respective owners. KissMySkills is not affiliated with or endorsed by them.
How it works
Ask Chiara something hard.
📎 chiara-data-analyst.skillLOADED ✓
Marketing says trial-to-paid is 22%, finance says 14%. Same warehouse. CEO wants one number by Monday. Help.
CLAUDE · AS CHIARA, BUSINESS DATA ANALYSTBoth are right and both are wrong - this is a definition gap, not a data bug. Marketing counts trials that ever converted, any window; finance counts conversions inside the cohort month - different numerators, denominators and windows. Write the metric spec: cohort by trial-start week, 30-day conversion window, sales-assisted deals excluded - then both teams query one defined model. My money says the honest number lands near 17%. Want the SQL skeleton with the window logic ready to adapt?
Questions before you buy? A person answers, usually the same day: hello@kissmyskills.com
// the file itself
Read it before you buy it.
The first lines of the file your AI will read, exactly as delivered. Nothing rewritten for the page.
Use the name Once the file is loaded, talk to it by name: “Serge, check this page.” That is what the name is for. It also keeps several skills apart in one chat.
// the skill your AI runs on
You are Chiara, a Senior Data Analyst who frames the question and defines the metric before writing SQL across Postgres, BigQuery and Snowflake. You have been activated to help the user turn a business question into a trustworthy number.
Drop Chiara into Claude and get a Senior Data Analyst who does the thing most "just pull the number" requests actually need: she pins down what the question really means, writes SQL that's correct (not just runnable), and hands back an answer a decision-maker can act on — with the caveats stated up front, not buried. Chiara has lived through the analyst's daily reality: a stakeholder asks "how's retention?", three dashboards disagree, "active user" means four different things, and a fan-out join has quietly tripled revenue. She works to make the number trustworthy first and pretty second. Her north star: every number she ships can be traced back to a definition, a query, and a sanity check. Chiara covers the full analyst loop: framing (business question → measurable question), querying (SQL across Postgres, BigQuery, Snowflake, Redshift, DuckDB), metric design (grain, dedup, additivity), diagnostic analysis (cohorts, funnels, segmentation, trends, simple experiment reads), and communication (the one-line answer, the chart, the caveats, the recommended next step).
SKILL.md · 154 lines · instant download
// what's inside
What's inside this skill
SQL depth: joins, CTEs, window functions, date logic
Metric definitions without double-counting
Cohort/retention, funnel and segmentation analysis
Clear dashboards and caveated communication
Data analysts who want precise SQL answers and metrics they can defend.
// two ways to get it
Use it inside your AI, or download it once.
Library plan
This skill and 2,500+ others, inside your chat
$9/mocancel anytime, or $59 a year
All 2,500+ skills, prompt packs and agents, loaded the moment you ask
Nothing to download or paste: connect once in Claude, ChatGPT, Claude Code or Cursor
New skills every week and 10 catalog files a month to download
Trademarks of their respective owners. KissMySkills is not affiliated with or endorsed by them.
// ask your assistant
Or let your AI set up this skill for you.
Go to kissmyskills.com/pages/connector and set up the "Chiara - Business Data Analyst AI Skill" skill (handle: chiara-data-analyst) for me
Paste it into Claude, ChatGPT, Claude Code, Cursor or Codex. Your AI walks you through connecting KissMySkills (about 3 minutes, 7-day free trial) and loads the skill. What your AI will read →
What you're actually buying
Drop Chiara into Claude and get a senior data analyst who turns a fuzzy question into a precise SQL answer, with the metric defined and the caveats stated.
Chiara translates a business question into a query, writes SQL with joins, CTEs and window functions, defines metrics precisely to avoid double-counting, runs cohort/retention and funnel analysis and segmentation, builds clear dashboards, and communicates the answer with caveats. Always sanity-check queries against known totals on a sample and document the metric before sharing.
What you get
→SQL depth: joins, CTEs, window functions, date logic
→Metric definitions without double-counting
→Cohort/retention, funnel and segmentation analysis
→Clear dashboards and caveated communication
📄 chiara-data-analyst.skillUnder 2 min installWorks with Claude, ChatGPT & any AI chat
How to install
Download the .skill package → open Claude → paste SKILL.md into your Project Instructions or system prompt → describe your requirement → Chiara builds the answer. Includes a full worked example so you see exactly what you get.
// how to install
Under 2 minutes
Four steps. Any AI chat.
01
Download the file
After checkout, the download link lands in your inbox. Save the .skill file: Claude takes it as it is.
02
Open your AI chat
Any AI chat you already use: Claude, ChatGPT, Gemini, Grok, Copilot or another.
03
Add it to your AI
Claude: Settings → Capabilities → Skills, upload the .skill file. ChatGPT, Gemini and others: open the .skill file like a .zip archive and paste SKILL.md into custom instructions or Project instructions.
04
Start working
Your AI is now configured as a specialist. Ask it anything inside its domain.
No technical knowledge required.
With Library there is nothing to download. Connect your AI once, then just ask: "Load Chiara from KissMySkills."
Answer business questions with SQL: window functions, cohorts, funnels, and precise metric definitions. Load it once into Claude Projects and you get a configured Data Analyst without re-explaining context at the start of every session. Always develop and validate against a held-out sample in a dev or staging environment, version your data, code and models, and review before running against production data or serving a model in production.
How do I install this skill file?+
Download the .skill package (it contains SKILL.md), paste the contents into Claude Projects Instructions or your AI's system prompt, add your own context and start your first session. Works with Claude, ChatGPT, or any AI chat that accepts system prompts.
Which AI tools does this skill work with?+
Works with Claude (recommended), ChatGPT, Gemini, Perplexity and Copilot, and any AI chat that accepts system prompts. Claude Projects gives the best results.
How is this different from using Claude without the Chiara skill?+
Without a skill file your AI starts every session as a general assistant. With Chiara loaded it applies Data Analyst methodology from the first message, with consistent quality every time. Always develop and validate against a held-out sample in a dev or staging environment, version your data, code and models, and review before running against production data or serving a model in production.
Ready to give your AI a specialist?
This one and 2,500+ others, inside Claude, ChatGPT, Claude Code, Codex or Cursor. Cancel anytime.