What do I need to use Cap Table Explainer?

Current ownership; The round; SAFE / note terms; New option pool.

Is Cap Table Explainer free to use?

Yes — run it free in the browser playground (no API key needed for the sponsored trial, or bring any provider key), or install it into Claude Code, Cursor, ChatGPT and more via npx pm-claude-skills. MIT-licensed and open source.

Cap Table Explainer

Q: How do I know the Cap Table Explainer output is good?

The skill verifies itself against its own quality checks: Before/after table sums to 100% both columns; SAFE conversion uses the investor-favourable of cap vs discount, shown explicitly; The option-pool shuffle is quantified, not hand-waved; Includes the "not legal/financial advice — confirm with counsel" disclaimer.

🔵 Stable🕐 updated 2026-06-21 🔷 SkillSpec L3 pm-founders

Explain a cap table, dilution, SAFEs, option pools, and round mechanics in plain English with the actual math. Use when asked to explain dilution, model a SAFE or priced round, size an option pool, understand a term sheet's economics, or figure out who owns what after a raise. Produces a worked ownership breakdown before/after the round, the dilution math step by step, and the traps founders miss. Not legal or financial advice.

📚 Based on Y Combinator SAFE & standard round mechanics

▶ Run it free — no key needed 📝 Grade your existing draft View SKILL.md ↗

What to give it

▸Current ownership — founders %, existing investors, current option pool

▸The round — amount raised, pre- or post-money valuation, instrument (priced equity, SAFE, convertible note)

▸SAFE / note terms — if any: cap, discount, MFN

▸New option pool — target, and whether it's pre- or post-money ("the pool shuffle")

✅ The bar it holds itself to

Every skill in this library self-verifies — these are this skill's own quality checks, straight from its definition.

✓Before/after table sums to 100% both columns

✓SAFE conversion uses the investor-favourable of cap vs discount, shown explicitly

✓The option-pool shuffle is quantified, not hand-waved

✓Includes the "not legal/financial advice — confirm with counsel" disclaimer

⚠️ What it refuses to do

Confusing pre- and post-money (the most common, most expensive error)

Ignoring the option pool's dilution effect

Treating ownership % as the whole story while ignoring liquidation preferences

Presenting math without stating assumptions

Install

npx pm-claude-skills add --agent claude   # or codex · cursor · gemini · hermes
# or one-line MCP (every skill, any client):
claude mcp add pm-skills -- npx -y pm-claude-skills-mcp

Start with

Related skills

🔌 Embed this skill

Drop this on your blog, docs, or site — it renders a "Run this skill" card:

<div data-pm-skill="cap-table-explainer"></div>
<script src="https://mohitagw15856.github.io/pm-claude-skills/embed.js" async></script>

💬 Discussion

Cap Table Explainer is one of 599 open-source professional AI agent skills — all SkillSpec L3. Try them all in the browser · ⭐ Star on GitHub · Browse the full catalog