The First 5 Claude Skills Every Founder Should Know

Founders repeat the same work every month: a pitch deck, a runway model, a contract, a form, an investor update. Claude Skills let you teach Claude how to do that work once, so you stop re-explaining your format in every chat. Here are the five skills worth learning first.

What a Claude Skill is

The pain: Every new chat starts from zero. You paste the same instructions, fix the same formatting mistakes, and get slightly different results each time.

The fix: A skill is a folder with a SKILL.md file inside it: instructions, a short description, and optional scripts or templates. Claude reads each skill's description, and Claude uses it automatically when your request matches. Only then does it load the full instructions, so skills do not clutter every conversation.

Docs: Agent Skills overview

1. PowerPoint: your pitch deck

The pain: Investor decks eat whole weekends, and every version needs a new layout.

The fix: The PowerPoint skill lets Claude build and edit real .pptx files. Give it your story, your numbers and your brand colors, then ask for a 10-slide seed deck. You get a file you can open and polish, not a wall of text to copy over.

2. Excel: runway and financial models

The pain: Your burn, runway and revenue forecast live in a spreadsheet that only you understand.

The fix: The Excel skill creates and edits .xlsx files with working formulas. Ask for a 24-month runway model with a base, best and worst case, or hand it a messy export and ask it to clean the data. One warning: check every formula and assumption yourself before the numbers go to an investor.

3. Word: contracts, proposals and job descriptions

The pain: Proposals, one-pagers, offer letters and job posts get rewritten from scratch each time.

The fix: The Word skill produces and edits .docx files, including formatting. Keep one clean template, then ask Claude to draft a client proposal or a job description in the same style. For anything legal, treat the output as a first draft and have a lawyer review it.

4. PDF: forms, merges and extraction

The pain: Vendor agreements, bank forms and investor documents arrive as PDFs that you have to read, fill in or combine by hand.

The fix: The PDF skill can extract text and tables, merge or split files, and fill forms. Ask Claude to pull every payment term out of five vendor contracts into one table, and you will save an afternoon.

5. Your own custom skill

The pain: The first four skills are generic. Your company has its own way of writing sales emails, onboarding customers and reporting to investors.

The fix: Write your own skill. It is a folder with a SKILL.md file that starts with a name and a description, followed by your instructions in plain Markdown. The description decides when Claude uses it, so make it specific.

---
name: investor-update
description: Writes our monthly investor update. Use when asked for an investor update or monthly report.
---

# Investor update

1. Open with three numbers: MRR, monthly burn and runway in months.
2. Add one win, one problem and one clear ask.
3. Keep it under 300 words and write in plain language.

Custom skills can live in your Claude setup, in Claude Code, or be uploaded through the API. Note that on the API, custom skills are shared across your whole workspace, so never put passwords or API keys in a skill.

How to start this week

Pick the document you rebuild most often and ask Claude to make it with the matching skill. Fix what is wrong, then turn your corrections into a custom skill so the next version comes out right the first time. Skills are not magic: they make Claude consistent, but you are still the one who signs off on the numbers and the contracts.

Sources: Agent Skills overview and Agent Skills in the Claude Agent SDK.