Agent skill

Cap Table

by 1984vc in 1984vc/cap-table

Model startup cap table ownership — SAFE conversions (cap, discount, post-money), priced rounds, option pool refreshes, and dilution.

MITAuto-check passedBusiness, Finance & HR

Install Cap Table

skills CLI

$ npx skills add 1984vc/cap-table --skill cap-table -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install 1984vc/cap-table cap-table --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/1984vc/cap-table.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/cap-table .claude/skills/cap-table && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "cap-table" agent skill from https://github.com/1984vc/cap-table/tree/main/skills/cap-table into .claude/skills/cap-table/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cap-table", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/1984vc/cap-table/tree/main/skills/cap-table

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add 1984vc/cap-table --skill cap-table -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install 1984vc/cap-table cap-table --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/1984vc/cap-table.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/cap-table .agents/skills/cap-table && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "cap-table" agent skill from https://github.com/1984vc/cap-table/tree/main/skills/cap-table into .agents/skills/cap-table/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cap-table", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add 1984vc/cap-table --skill cap-table -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install 1984vc/cap-table cap-table --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/1984vc/cap-table.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/cap-table .cursor/skills/cap-table && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "cap-table" agent skill from https://github.com/1984vc/cap-table/tree/main/skills/cap-table into .cursor/skills/cap-table/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cap-table", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/1984vc/cap-table.git --path skills/cap-table

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add 1984vc/cap-table --skill cap-table -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install 1984vc/cap-table cap-table --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/1984vc/cap-table.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/cap-table .gemini/skills/cap-table && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "cap-table" agent skill from https://github.com/1984vc/cap-table/tree/main/skills/cap-table into .gemini/skills/cap-table/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cap-table", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install 1984vc/cap-table cap-table

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add 1984vc/cap-table --skill cap-table -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/1984vc/cap-table.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/cap-table .github/skills/cap-table && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "cap-table" agent skill from https://github.com/1984vc/cap-table/tree/main/skills/cap-table into .github/skills/cap-table/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cap-table", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add 1984vc/cap-table --skill cap-table -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install 1984vc/cap-table cap-table --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/1984vc/cap-table.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/cap-table .opencode/skills/cap-table && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "cap-table" agent skill from https://github.com/1984vc/cap-table/tree/main/skills/cap-table into .opencode/skills/cap-table/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cap-table", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: cap-table
GitHub stars: 141
Token cost: ~2.1k tokens
SKILL.md length: 549 words
Files: 3 (incl. references)
Skills in repo: 1
Repo updated: Sep 25, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Model startup cap table ownership — SAFE conversions (cap, discount, post-money), priced rounds, option pool refreshes, and dilution.

Calculating founder ownership percentages
SKILL.md covers Transaction-grade semantics, Install, Commands and Input Format, plus 5 more sections
Calls npx and npm
Converting SAFEs to equity

What it does

Cap Table is an agent skill from 1984vc/cap-table. Model startup cap table ownership — SAFE conversions (cap, discount, post-money), priced rounds, option pool refreshes, and dilution. Use when calculating founder ownership percentages, converting SAFEs to equity, building pre-round or post-round cap tables, or estimating dilution from a Series A/B raise.

Its SKILL.md is about 2.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files, including reference files (for example `manifest.json` and `references/library-api.md`).

It sits in Business, Finance & HR, covering Financial modeling. The repository describes itself as: Open Source Captable Worksheet. The licence is MIT.

When your agent uses it

Calculating founder ownership percentages
Converting SAFEs to equity
Building pre-round
Post-round cap tables

Example prompts

“/cap-table”

Requirements

Node.js

What it can do on your machine

Read from SKILL.md and the folder at commit 400533d. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- npx
- npm
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
- npmjs.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Cap Table loads about 2.1k tokens when it runs, and up to ~3.5k if it reads all its reference files. Until then it costs about 79 tokens; SKILL.md has 549 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~79
When it runs · the whole SKILL.md, loaded when a task matches: ~2.1k
With references · SKILL.md plus every file in references/, read only if the agent opens them: ~3.5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Download SKILL.mdSave it as .claude/skills/cap-table/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.

name: cap-table
description: Model startup cap table ownership — SAFE conversions (cap, discount, post-money), priced rounds, option pool refreshes, and dilution. Use when calculating founder ownership percentages, converting SAFEs to equity, building pre-round or post-round cap tables, or estimating dilution from a Series A/B raise.
license: MIT
metadata.author: 1984 Ventures
metadata.version: 0.1.0

Cap Table Calculator

Model startup cap tables: ownership percentages, SAFE conversions, priced rounds, and option pool refreshes.

Transaction-grade semantics

Use seriesInvestors as the canonical priced-round input. Legacy seriesInvestments is accepted, but if both are present their amounts must match in order. yc7p is exactly 7% after all SAFE conversions and before new Series shares and the option-pool increase. MFN elects a complete later post-money package (cap plus discount) at actual conversion, with the earliest package winning a PPS tie. Pro-rata and later pre-money MFN adoption are unsupported and throw a typed CalculationError.

The solver detects repeated rounded states, reconciles an exact integer share identity, and exposes authoritative per-SAFE and per-Series-investor outcomes.

Install

bash

npx skills add 1984vc/cap-table

This installs the skill into your project so coding agents (Claude Code, Cursor, etc.) can use it. The CLI itself runs via npx @1984vc/cap-table — no separate install needed.

Commands

Command	When to use
`existing`	Just existing shareholders, no SAFEs or rounds
`estimated-pre-round`	Have SAFEs but no priced round yet — estimates ownership
`pre-round`	Know the priced round valuation — shows pre-money ownership
`priced-round`	Full priced round with SAFE conversions, series investors, option pool

Input Format

All commands accept a JSON object. You can pass it as an argument, pipe via stdin, or point to a .json file.

bash

# As argument
npx @1984vc/cap-table priced-round '{...}'

# Via stdin
echo '{...}' | npx @1984vc/cap-table priced-round

# From file
npx @1984vc/cap-table priced-round ./input.json

# Founder-facing Markdown report
npx @1984vc/cap-table priced-round ./input.json --format markdown

Use the default JSON to inspect exact values, SAFE conversion outcomes, and ownershipError caveats when reasoning about a result. Present the answer to the founder in Markdown; --format markdown produces a ready-to-share table with estimate notes and links to 1984's founder guides. Never treat a tbd estimate as final ownership.

Input Schema

json

{
  "preMoneyValuation": 12000000,
  "common": [
    { "name": "Founder 1", "shares": 4500000 },
    { "name": "Founder 2", "shares": 4500000 },
    { "name": "Options Pool", "shares": 1000000, "commonType": "unusedOptions" }
  ],
  "safes": [
    {
      "name": "Seed SAFE",
      "investment": 1000000,
      "cap": 10000000,
      "discount": 0,
      "conversionType": "post"
    }
  ],
  "seriesInvestors": [
    { "name": "Lead Investor", "investment": 2000000 }
  ],
  "targetOptionsPct": 0.10
}

Fields:

Field	Required	Default	Description
`preMoneyValuation`	priced-round, pre-round	—	Pre-money valuation in dollars
`common[].name`	yes	—	Shareholder name
`common[].shares`	yes	—	Number of shares
`common[].commonType`	no	`"shareholder"`	Use `"unusedOptions"` for unissued option pool
`safes[].investment`	yes	—	Dollar amount invested
`safes[].cap`	no	`0`	Valuation cap (0 = uncapped)
`safes[].discount`	no	`0`	Discount as decimal (0.2 = 20%)
`safes[].conversionType`	no	`"post"`	`"pre"` or `"post"` money conversion
`safes[].sideLetters`	no	—	Array: `["mfn"]` for Most Favored Nation
`seriesInvestors[].investment`	yes	—	Dollar amount invested
`targetOptionsPct`	no	`0.10`	Target option pool % post-round
`unusedOptions`	no	auto-detected	Explicit unused options count

Note: You do NOT need to pass type: "common", type: "safe", etc. The CLI auto-fills these.

Show full SKILL.md (189 more words)Show less

For `existing` only:

json

{
  "common": [
    { "name": "Founder 1", "shares": 8000000 },
    { "name": "Founder 2", "shares": 2000000 }
  ]
}

Output

`existing` → Object with common rows, optionsPool, and total

json

{
  "common": [
    { "name": "Founder 1", "shares": 8000000, "ownershipPct": 0.8, "type": "common", "commonType": "shareholder" },
    { "name": "Founder 2", "shares": 2000000, "ownershipPct": 0.2, "type": "common", "commonType": "shareholder" }
  ],
  "optionsPool": { "name": "Options Pool", "shares": 0, "ownershipPct": 0, "type": "optionsPool" },
  "total": { "name": "Total", "shares": 10000000, "investment": 0, "ownershipPct": 1, "type": "total" }
}

`estimated-pre-round` → Object

json

{
  "common": [...],
  "safes": [...],
  "total": { "name": "Total", "shares": 10666666, "investment": 500000, "ownershipPct": 1 }
}

`priced-round` / `pre-round` → Object with conversion + capTable

json

{
  "conversion": {
    "pps": 1.04836,
    "ppss": [0.90001],
    "totalShares": 13354265,
    "newSharesIssued": 3354265,
    "preMoneyShares": 10335426,
    "postMoneyShares": 11111098,
    "convertedSafeShares": 1111098,
    "seriesShares": 1907741,
    "additionalOptions": 335426,
    "totalOptions": 1335426,
    "totalInvested": 3000000
  },
  "capTable": {
    "common": [...],
    "safes": [
      { "name": "Seed SAFE", "investment": 1000000, "ownershipPct": 0.083, "shares": 1111098, "pps": 0.90001 }
    ],
    "series": [
      { "name": "Lead", "investment": 2000000, "ownershipPct": 0.143, "shares": 1907741, "pps": 1.04836 }
    ],
    "optionsPool": { "shares": 1335426, "ownershipPct": 0.1 },
    "total": { "shares": 13354265, "investment": 3000000, "ownershipPct": 1 }
  }
}

Key Concepts

SAFE Conversion

SAFEs convert to equity at a priced round. The investor gets the better of two prices:

Cap price: cap / shares (guarantees minimum ownership %)
Discount price: (1 - discount) * seriesPPS (discount off round price)

Pre-money SAFEs convert on the pre-money share count. Post-money SAFEs (YC standard) guarantee a fixed ownership % post-money.

MFN (Most Favored Nation)

An MFN SAFE elects the complete later post-money term package producing the lowest conversion PPS. Pass sideLetters: ["mfn"].

Option Pool Refresh

targetOptionsPct controls the post-round option pool size (common: 10-20%). The gap between current unissued pool and target creates additional dilution shared by existing shareholders.

Ownership Percentages

All ownershipPct values are decimals: 0.45 = 45%. Successful solver output has an exact reconciled share identity after legal rounding.

Quick Examples

bash

# Simple existing ownership
npx @1984vc/cap-table existing '{
  "common": [
    {"name": "Alice", "shares": 6000000},
    {"name": "Bob", "shares": 4000000}
  ]
}'

# Pre-round with SAFEs (no priced round)
npx @1984vc/cap-table estimated-pre-round '{
  "common": [
    {"name": "Founder", "shares": 8000000},
    {"name": "Pool", "shares": 2000000, "commonType": "unusedOptions"}
  ],
  "safes": [
    {"name": "Angel 1", "investment": 250000, "cap": 5000000},
    {"name": "Angel 2", "investment": 500000, "cap": 8000000}
  ]
}'

# Full Series A
npx @1984vc/cap-table priced-round '{
  "preMoneyValuation": 20000000,
  "common": [
    {"name": "CEO", "shares": 4000000},
    {"name": "CTO", "shares": 4000000},
    {"name": "Pool", "shares": 500000},
    {"name": "Unissued", "shares": 500000, "commonType": "unusedOptions"}
  ],
  "safes": [
    {"name": "Seed Fund", "investment": 1500000, "cap": 8000000}
  ],
  "seriesInvestors": [
    {"name": "Series A Lead", "investment": 5000000}
  ],
  "targetOptionsPct": 0.15
}'

Error Handling

Invalid input (e.g., SAFE investment >= cap) exits with non-zero code and error to stderr. Always check the exit code.

Advanced

For programmatic TypeScript/JavaScript use: npm install @1984vc/cap-table. See references/library-api.md for the full API, math foundations, and type reference.

GitHub: https://github.com/1984vc/cap-table
npm: https://www.npmjs.com/package/@1984vc/cap-table

Files

SKILL.md and 2 other files (references) in skills/cap-table of 1984vc/cap-table.

SKILL.md
manifest.json
references/library-api.md

Open the folder on GitHubat commit 400533d

Compare with similar skills

Cap Table next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Cap Table compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Cap Table this skill1984vc/cap-table	141	—	~2.1k	Automated safety check: Pass	MIT	12 days ago
Creating Financial ModelsChen-zexi/open-ptc-agent	729	4 repos	~1.3k	Automated safety check: Pass	MIT	8 mo ago
Equity Researcherlzwme/finance-quant-skills	435	1 repos	~4.9k	Automated safety check: Pass	None	15 days ago
Equity ResearchrollingSirius/equity-research-skill	452	—	~1.5k	Automated safety check: Pass	MIT	1 mo ago
SaaS Metrics Coachrongxinzy/RongxinAI	154	2 repos	~1.3k	Automated safety check: Pass	MIT	today
Startup Financial Modelingnicepkg/auto-company	192	12 repos	~2.8k	Automated safety check: Pass	None	7 mo ago

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Questions about Cap Table

What does Cap Table do?

Model startup cap table ownership — SAFE conversions (cap, discount, post-money), priced rounds, option pool refreshes, and dilution. Cap Table is an agent skill from 1984vc/cap-table. Model startup cap table ownership — SAFE conversions (cap, discount, post-money), priced rounds, option pool refreshes, and dilution.

When should I use Cap Table?

Cap Table fits situations like: calculating founder ownership percentages; converting SAFEs to equity; building pre-round; post-round cap tables.

How do I install Cap Table in Claude Code?

Run `npx skills add 1984vc/cap-table --skill cap-table -a claude-code`. Or copy the skill folder (skills/cap-table in 1984vc/cap-table) into .claude/skills/cap-table in your project. Claude Code loads it when a task matches its description.

How do I install Cap Table in Codex?

Run `npx skills add 1984vc/cap-table --skill cap-table -a codex`. Or copy the skill folder (skills/cap-table in 1984vc/cap-table) into .agents/skills/cap-table in your project. Codex loads it when a task matches its description.

Can I use Cap Table in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add 1984vc/cap-table --skill cap-table -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/cap-table, .gemini/skills/cap-table, .github/skills/cap-table and .opencode/skills/cap-table in your project.

What does Cap Table need to run?

Going by SKILL.md and its folder, Cap Table needs the command-line tools its instructions call (npx and npm). Our summary lists: Node.js.

Does Cap Table access the network?

SKILL.md names 1 domain. As links in the text: npmjs.com. This is read from the text; nothing was executed.

Is Cap Table safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Cap Table use?

Cap Table is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Cap Table use?

About 2.1k tokens (SKILL.md is roughly 8.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.4k tokens, read only when the agent opens those files.

What are the alternatives to Cap Table?

Skills that share tags, products or a category with Cap Table: Creating Financial Models (Chen-zexi/open-ptc-agent, 729 stars), Equity Researcher (lzwme/finance-quant-skills, 435 stars), Equity Research (rollingSirius/equity-research-skill, 452 stars) and SaaS Metrics Coach (rongxinzy/RongxinAI, 154 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Cap Table?

1984vc (a GitHub organization) maintains it in 1984vc/cap-table, which has 141 GitHub stars. The repository was last updated on September 25, 2026.

Source: 1984vc/cap-table on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Cap Table

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Cap Table Calculator

Transaction-grade semantics

Install

Commands

Input Format

Input Schema

For existing only:

Output

existing → Object with common rows, optionsPool, and total

estimated-pre-round → Object

priced-round / pre-round → Object with conversion + capTable

Key Concepts

SAFE Conversion

MFN (Most Favored Nation)

Option Pool Refresh

Ownership Percentages

Quick Examples

Error Handling

Advanced

Files

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Related

Questions about Cap Table

For `existing` only:

`existing` → Object with common rows, optionsPool, and total

`estimated-pre-round` → Object

`priced-round` / `pre-round` → Object with conversion + capTable