Creating Financial Models
Chen-zexi/open-ptc-agent
This skill provides an advanced financial modeling suite with DCF analysis, sensitivity testing, Monte Carlo simulations, and scenario planning for investment decisions
Establishes whether the business makes money on each customer or unit — contribution margin, acquisition cost, payback period, lifetime value, and the cohort behavior underneath.
Install Unit Economics
$ npx skills add cbrock84/headcount --skill unit-economics -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install cbrock84/headcount unit-economics --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/cbrock84/headcount.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/finance/skills/unit-economics .claude/skills/unit-economics && rm -rf skills-srcUse ~/.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/
Install the "unit-economics" agent skill from https://github.com/cbrock84/headcount/tree/main/plugins/finance/skills/unit-economics into .claude/skills/unit-economics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "unit-economics", 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 install https://github.com/cbrock84/headcount/tree/main/plugins/finance/skills/unit-economicsType 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.
$ npx skills add cbrock84/headcount --skill unit-economics -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install cbrock84/headcount unit-economics --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/cbrock84/headcount.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/finance/skills/unit-economics .agents/skills/unit-economics && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "unit-economics" agent skill from https://github.com/cbrock84/headcount/tree/main/plugins/finance/skills/unit-economics into .agents/skills/unit-economics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "unit-economics", 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.
$ npx skills add cbrock84/headcount --skill unit-economics -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install cbrock84/headcount unit-economics --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/cbrock84/headcount.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/finance/skills/unit-economics .cursor/skills/unit-economics && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "unit-economics" agent skill from https://github.com/cbrock84/headcount/tree/main/plugins/finance/skills/unit-economics into .cursor/skills/unit-economics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "unit-economics", 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 https://github.com/cbrock84/headcount.git --path plugins/finance/skills/unit-economics--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add cbrock84/headcount --skill unit-economics -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install cbrock84/headcount unit-economics --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/cbrock84/headcount.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/finance/skills/unit-economics .gemini/skills/unit-economics && rm -rf skills-srcUse ~/.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/
Install the "unit-economics" agent skill from https://github.com/cbrock84/headcount/tree/main/plugins/finance/skills/unit-economics into .gemini/skills/unit-economics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "unit-economics", 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.
$ gh skill install cbrock84/headcount unit-economicsInstalls 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).
$ npx skills add cbrock84/headcount --skill unit-economics -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/cbrock84/headcount.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/finance/skills/unit-economics .github/skills/unit-economics && rm -rf skills-srcUse ~/.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/
Install the "unit-economics" agent skill from https://github.com/cbrock84/headcount/tree/main/plugins/finance/skills/unit-economics into .github/skills/unit-economics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "unit-economics", 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.
$ npx skills add cbrock84/headcount --skill unit-economics -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install cbrock84/headcount unit-economics --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/cbrock84/headcount.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/finance/skills/unit-economics .opencode/skills/unit-economics && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "unit-economics" agent skill from https://github.com/cbrock84/headcount/tree/main/plugins/finance/skills/unit-economics into .opencode/skills/unit-economics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "unit-economics", 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
unit-economics- GitHub stars
- 2k
- Token cost
- ~824 tokens
- SKILL.md length
- 422 words
- Files
- 2 (incl. references)
- Skills in repo
- 178
- Repo updated
- First seen
- Licence
- MIT
At a glance
Establishes whether the business makes money on each customer or unit — contribution margin, acquisition cost, payback period, lifetime value, and the cohort behavior underneath.
- Works in 5 steps: Define the unit. A customer, an account,… → Contribution margin — revenue per unit… → Acquisition cost — fully loaded. All… → …
- Tasks that involve Financial modeling
- SKILL.md covers Build it in this order, Read it honestly, What it should change and Sources, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Unit Economics is an agent skill from cbrock84/headcount. Establishes whether the business makes money on each customer or unit — contribution margin, acquisition cost, payback period, lifetime value, and the cohort behavior underneath. Use this to assess whether growth is profitable, evaluate a channel or segment, support a pricing decision, judge how fast the business can afford to grow, or diagnose why revenue growth is not producing profit.
Its SKILL.md is about 820 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/sources.md`).
It sits in Business, Finance & HR, covering Financial modeling. The repository describes itself as: An agent organization structured as a company — 15+ departments, 125+ skills, each independently installable, citing the standards and regulators that settle the question. Runs… The licence is MIT.
When your agent uses it
- Tasks that involve Financial modeling
Example prompts
- “Use the unit-economics skill to establish whether the business makes money on each customer or unit — contribution margin, acquisition cost, payback…”
- “/unit-economics”
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Define the unit. A customer, an account, a seat, an order. State it, because most
- Contribution margin — revenue per unit minus the costs that vary with it. Include everything
- Acquisition cost — fully loaded. All sales and marketing spend, including salaries, divided
- Payback period — acquisition cost divided by monthly contribution. This is the number that
- Lifetime value — contribution × expected lifetime, from observed retention. Not from a
What it can do on your machine
Read from SKILL.md and the folder at commit 98d1c17. 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
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
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
Unit Economics loads about 824 tokens when it runs, and up to ~1.2k if it reads all its reference files. Until then it costs about 101 tokens; SKILL.md has 422 words of instructions outside code blocks.
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
The full file from cbrock84/headcount at commit 98d1c17, republished under its MIT licence (© cbrock84). 422 words, ~824 tokens.
Download SKILL.mdSave it as
.claude/skills/unit-economics/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- unit-economics
- description
- Establishes whether the business makes money on each customer or unit — contribution margin, acquisition cost, payback period, lifetime value, and the cohort behavior underneath. Use this to assess whether growth is profitable, evaluate a channel or segment, support a pricing decision, judge how fast the business can afford to grow, or diagnose why revenue growth is not producing profit.
Unit economics
The question is simple and usually unanswered: does one more customer make the business better off, and how long does that take?
Build it in this order
- Define the unit. A customer, an account, a seat, an order. State it, because most disagreements about unit economics are disagreements about the unit.
- Contribution margin — revenue per unit minus the costs that vary with it. Include everything that actually varies: payment processing, hosting attributable to usage, support load, delivery, third-party fees. Understating variable cost is the single most common error and it flatters everything downstream.
- Acquisition cost — fully loaded. All sales and marketing spend, including salaries, divided by customers acquired in the same period. Excluding people costs is the second most common error and typically understates by half or more.
- Payback period — acquisition cost divided by monthly contribution. This is the number that governs how fast you can grow without financing it.
- Lifetime value — contribution × expected lifetime, from observed retention. Not from a churn-rate assumption chosen because it produces a good ratio.
Read it honestly
- Ratios hide the constraint. A healthy lifetime-value ratio with a long payback still means growth consumes cash faster than it produces it. Payback governs the growth rate; the ratio governs whether it is worth doing at all.
- Segment before concluding. Blended economics almost always conceal one segment subsidizing another. The average is the least useful number.
- Use cohorts, not averages. Retention improves or decays over time, and blended figures mask which. If early cohorts retain better than recent ones, the business is deteriorating while the average looks stable.
- Do not extrapolate lifetime beyond your data. A twelve-month-old company cannot observe a three-year lifetime, and assuming one is how unprofitable businesses appear profitable.
Show full SKILL.md (130 more words)Show less
What it should change
Good unit economics by segment tell you where to spend. Bad ones tell you to fix the model before scaling — no acquisition efficiency rescues a negative contribution margin, it only reaches the loss faster.
Sources
references/sources.md in this skill lists the outside authorities that settle the questions
here — what each one is authoritative for, and what you may do with it. Check them before
answering on anything they cover, and cite what you used. Most are free to read and not free
to reproduce; the use note on each is binding.
Never
- Compare acquisition cost against revenue rather than contribution.
- Report lifetime value without stating the retention data behind it and its observation window.
- Treat improving ratios as progress without checking whether the mix simply shifted.
© cbrock84, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file (references) in plugins/finance/skills/unit-economics of cbrock84/headcount.
- SKILL.md
- references/sources.md
Open the folder on GitHubat commit 98d1c17
Compare with similar skills
Unit Economics 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Unit Economics this skillcbrock84/headcount | 2k | — | ~824 | Automated safety check: Pass | MIT | |
| Creating Financial ModelsChen-zexi/open-ptc-agent | 729 | 3 repos | ~1.3k | Automated safety check: Pass | MIT | |
| Equity ResearchrollingSirius/equity-research-skill | 453 | — | ~1.5k | Automated safety check: Pass | MIT | |
| SaaS Metrics Coachrongxinzy/RongxinAI | 154 | 2 repos | ~1.3k | Automated safety check: Pass | MIT | |
| Startup Financial Modelingnicepkg/auto-company | 195 | 11 repos | ~2.8k | Automated safety check: Pass | None | |
| Stock Value AnalyzerFunnyKun/stock-value-analyzer | 141 | — | ~3.3k | Automated safety check: Pass | None |
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Related
Categories
Questions about Unit Economics
What does Unit Economics do?
Establishes whether the business makes money on each customer or unit — contribution margin, acquisition cost, payback period, lifetime value, and the cohort behavior underneath. Unit Economics is an agent skill from cbrock84/headcount. Establishes whether the business makes money on each customer or unit — contribution margin, acquisition cost, payback period, lifetime value, and the cohort behavior underneath.
When should I use Unit Economics?
Unit Economics fits situations like: tasks that involve Financial modeling.
How do I install Unit Economics in Claude Code?
Run `npx skills add cbrock84/headcount --skill unit-economics -a claude-code`. Or copy the skill folder (plugins/finance/skills/unit-economics in cbrock84/headcount) into .claude/skills/unit-economics in your project. Claude Code loads it when a task matches its description.
How do I install Unit Economics in Codex?
Run `npx skills add cbrock84/headcount --skill unit-economics -a codex`. Or copy the skill folder (plugins/finance/skills/unit-economics in cbrock84/headcount) into .agents/skills/unit-economics in your project. Codex loads it when a task matches its description.
Can I use Unit Economics 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 cbrock84/headcount --skill unit-economics -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/unit-economics, .gemini/skills/unit-economics, .github/skills/unit-economics and .opencode/skills/unit-economics in your project.
What does Unit Economics need to run?
SKILL.md names no scripts, command-line tools or credentials: Unit Economics is instructions for the agent only.
Does Unit Economics access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Unit Economics 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 Unit Economics use?
Unit Economics is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Unit Economics use?
About 824 tokens (SKILL.md is roughly 3.3k 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 410 tokens, read only when the agent opens those files.
What are the alternatives to Unit Economics?
Skills that share tags, products or a category with Unit Economics: Creating Financial Models (Chen-zexi/open-ptc-agent, 729 stars), Equity Research (rollingSirius/equity-research-skill, 453 stars), SaaS Metrics Coach (rongxinzy/RongxinAI, 154 stars) and Startup Financial Modeling (nicepkg/auto-company, 195 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Unit Economics?
cbrock84 (a GitHub user) maintains it in cbrock84/headcount, which has 2,022 GitHub stars. The repository holds 178 skills in this directory. The repository was last updated on September 17, 2026.
Source: cbrock84/headcount on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.