Master Builder
ibuilder/massing
Reason like a master builder — one mind holding an entire built-asset project from raw land through design, construction, handover, operations, and disposition, anywhere in the world.
Real estate yield calculator. An agent skill from revfactory/harness-100.
Install Cap Rate Calculator
$ npx skills add revfactory/harness-100 --skill cap-rate-calculator -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install revfactory/harness-100 cap-rate-calculator --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/revfactory/harness-100.git skills-src && mkdir -p .claude/skills && cp -r skills-src/en/96-real-estate-analyst/.claude/skills/cap-rate-calculator .claude/skills/cap-rate-calculator && 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 "cap-rate-calculator" agent skill from https://github.com/revfactory/harness-100/tree/main/en/96-real-estate-analyst/.claude/skills/cap-rate-calculator into .claude/skills/cap-rate-calculator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cap-rate-calculator", 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/revfactory/harness-100/tree/main/en/96-real-estate-analyst/.claude/skills/cap-rate-calculatorType 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 revfactory/harness-100 --skill cap-rate-calculator -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install revfactory/harness-100 cap-rate-calculator --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .agents/skills && cp -r skills-src/en/96-real-estate-analyst/.claude/skills/cap-rate-calculator .agents/skills/cap-rate-calculator && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "cap-rate-calculator" agent skill from https://github.com/revfactory/harness-100/tree/main/en/96-real-estate-analyst/.claude/skills/cap-rate-calculator into .agents/skills/cap-rate-calculator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cap-rate-calculator", 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 revfactory/harness-100 --skill cap-rate-calculator -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install revfactory/harness-100 cap-rate-calculator --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/en/96-real-estate-analyst/.claude/skills/cap-rate-calculator .cursor/skills/cap-rate-calculator && 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 "cap-rate-calculator" agent skill from https://github.com/revfactory/harness-100/tree/main/en/96-real-estate-analyst/.claude/skills/cap-rate-calculator into .cursor/skills/cap-rate-calculator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cap-rate-calculator", 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/revfactory/harness-100.git --path en/96-real-estate-analyst/.claude/skills/cap-rate-calculator--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 revfactory/harness-100 --skill cap-rate-calculator -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install revfactory/harness-100 cap-rate-calculator --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/en/96-real-estate-analyst/.claude/skills/cap-rate-calculator .gemini/skills/cap-rate-calculator && 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 "cap-rate-calculator" agent skill from https://github.com/revfactory/harness-100/tree/main/en/96-real-estate-analyst/.claude/skills/cap-rate-calculator into .gemini/skills/cap-rate-calculator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cap-rate-calculator", 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 revfactory/harness-100 cap-rate-calculatorInstalls 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 revfactory/harness-100 --skill cap-rate-calculator -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .github/skills && cp -r skills-src/en/96-real-estate-analyst/.claude/skills/cap-rate-calculator .github/skills/cap-rate-calculator && 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 "cap-rate-calculator" agent skill from https://github.com/revfactory/harness-100/tree/main/en/96-real-estate-analyst/.claude/skills/cap-rate-calculator into .github/skills/cap-rate-calculator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cap-rate-calculator", 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 revfactory/harness-100 --skill cap-rate-calculator -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install revfactory/harness-100 cap-rate-calculator --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/en/96-real-estate-analyst/.claude/skills/cap-rate-calculator .opencode/skills/cap-rate-calculator && 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 "cap-rate-calculator" agent skill from https://github.com/revfactory/harness-100/tree/main/en/96-real-estate-analyst/.claude/skills/cap-rate-calculator into .opencode/skills/cap-rate-calculator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cap-rate-calculator", 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-rate-calculator- GitHub stars
- 1.3k
- Token cost
- ~1k tokens
- SKILL.md length
- 226 words
- Files
- 1
- Skills in repo
- 464
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Real estate yield calculator. An agent skill from revfactory/harness-100.
- Requests involving Cap Rate
- SKILL.md covers Core Yield Metrics, Cash Flow Analysis, DCF (Discounted Cash Flow) and Investment Scenario Analysis, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Cash flow analysis
What it does
Cap Rate Calculator is an agent skill from revfactory/harness-100. Real estate yield calculator. Reference formulas and models used by the profitability-analyst agent for quantitative investment return analysis. Use for requests involving 'Cap Rate', 'yield analysis', 'DCF', or 'cash flow analysis'. Tax advisory and loan underwriting are out of scope.
Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Business, Finance & HR, covering Real estate, Financial modeling and Banking and insurance. The licence is Apache-2.0.
When your agent uses it
- Requests involving Cap Rate
- Cash flow analysis
Example prompts
- “Cap Rate”
- “yield analysis”
- “cash flow analysis”
- “/cap-rate-calculator”
What it can do on your machine
Read from SKILL.md and the folder at commit 8e8d35c. 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
Cap Rate Calculator loads about 1k tokens when it runs. Until then it costs about 77 tokens; SKILL.md has 226 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 revfactory/harness-100 at commit 8e8d35c, republished under its Apache-2.0 licence (© revfactory). 226 words, ~1,012 tokens.
Download SKILL.mdSave it as
.claude/skills/cap-rate-calculator/SKILL.md (or your agent's skills folder).- name
- cap-rate-calculator
- description
- Real estate yield calculator. Reference formulas and models used by the profitability-analyst agent for quantitative investment return analysis. Use for requests involving 'Cap Rate', 'yield analysis', 'DCF', or 'cash flow analysis'. Tax advisory and loan underwriting are out of scope.
Cap Rate Calculator — Real Estate Yield Calculator
Enhances the profitability-analyst agent's investment return analysis capabilities.
Core Yield Metrics
Cap Rate (Capitalization Rate)
Cap Rate = NOI / Purchase Price x 100
NOI (Net Operating Income) = Total Rental Income - Operating Expenses
Operating Expenses = Management Fees + Maintenance + Insurance + Taxes + Vacancy Loss
Example:
Purchase Price: $1,000,000
Annual Rental Income: $72,000 ($6,000/month)
Operating Expenses: $12,000
NOI: $60,000
Cap Rate: 60,000 / 1,000,000 x 100 = 6.0%Cap Rate Benchmarks
| Property Type | Cap Rate Range | Risk |
|---|---|---|
| Office (Prime) | 3.5-4.5% | Low |
| Office (Other) | 4.5-6.0% | Medium |
| Retail (Commercial) | 4.0-7.0% | Medium |
| Residential (Apartment) | 2.0-4.0% | Low |
| Logistics/Warehouse | 5.0-7.0% | Medium |
| Studio/Serviced Apartment | 3.5-5.5% | Medium |
Rental Yield (Gross Yield vs Net Yield)
Gross Yield = Annual Gross Rental Income / Purchase Price x 100
Net Yield = NOI / Purchase Price x 100
Typically Net Yield = Gross Yield x 0.7-0.85
(Operating expense ratio 15-30%)Cash Flow Analysis
Leveraged Return
Cash-on-Cash Return = Pre-Tax Cash Flow / Equity x 100
Pre-Tax Cash Flow = NOI - Annual Debt Service
Example:
Purchase Price: $1,000,000 (LTV 60% = Loan $600,000)
Equity: $400,000
NOI: $60,000
Annual Debt Service: $36,000 (3.5%, 30 years)
Pre-Tax Cash Flow: $24,000
Cash-on-Cash: 24,000 / 400,000 x 100 = 6.0%Monthly Cash Flow Template
| Item | Monthly | Annual |
|---|---|---|
| (+) Rental Income | $6,000 | $72,000 |
| (-) Vacancy Loss (5%) | -$300 | -$3,600 |
| (-) Management Fees | -$500 | -$6,000 |
| (-) Maintenance & Repairs | -$200 | -$2,400 |
| (-) Insurance | -$50 | -$600 |
| (-) Property Tax | -$150 | -$1,800 |
| (=) NOI | $4,800 | $57,600 |
| (-) Debt Service | -$3,000 | -$36,000 |
| (=) Pre-Tax Cash Flow | $1,800 | $21,600 |
DCF (Discounted Cash Flow)
Property Value = Sum of [NOI_t / (1+r)^t] + Terminal Value / (1+r)^n
Terminal Value = NOI_{n+1} / Exit Cap Rate
Variables:
r: Discount rate (typically 8-12%)
n: Holding period (typically 5-10 years)
Exit Cap Rate: Cap Rate at sale (typically +0.5% premium)
NOI Growth Rate Assumptions:
Conservative: 1-2% per year (inflation rate)
Baseline: 2-3% per year (rent escalation)
Optimistic: 3-5% per year (area growth)Investment Scenario Analysis
Scenario Template
| Item | Conservative | Baseline | Optimistic |
|---|---|---|---|
| Purchase Price | $1,000,000 | $1,000,000 | $1,000,000 |
| Initial Rent | $5,500/month | $6,000/month | $6,500/month |
| Vacancy Rate | 10% | 5% | 3% |
| Rent Escalation | 1%/year | 3%/year | 5%/year |
| Sale Price After 5 Years | $1,050,000 | $1,200,000 | $1,400,000 |
| 5-Year Total Return | 18% | 42% | 68% |
| Annualized Return | 3.4% | 7.3% | 10.9% |
Investment Decision Criteria
| Metric | Attractive | Hold | Reject |
|---|---|---|---|
| Cap Rate | > 5% | 3-5% | < 3% |
| Cash-on-Cash | > 8% | 5-8% | < 5% |
| IRR | > 12% | 8-12% | < 8% |
| Payback | < 8 years | 8-12 years | > 12 years |
| DSCR | > 1.3 | 1.1-1.3 | < 1.1 |
Quality Checklist
| Item | Criteria |
|---|---|
| Yield Metrics | Cap Rate + Cash-on-Cash + IRR |
| NOI Accuracy | Itemized operating expense calculation |
| Leverage | Loan terms reflected |
| Scenarios | Conservative/Baseline/Optimistic (3 scenarios) |
| Benchmarking | Comparable property comparison |
| Exit Strategy | Exit Cap Rate assumption |
© revfactory, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in en/96-real-estate-analyst/.claude/skills/cap-rate-calculator of revfactory/harness-100.
Open the folder on GitHubat commit 8e8d35c
Compare with similar skills
Cap Rate Calculator 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 |
|---|---|---|---|---|---|---|
| Cap Rate Calculator this skillrevfactory/harness-100 | 1.3k | — | ~1k | Automated safety check: Pass | Apache-2.0 | |
| Master Builderibuilder/massing | 122 | — | ~2.6k | Automated safety check: Pass | MIT | |
| Cre Industrialahacker-1/cre-agent-skills | 113 | — | ~1.2k | Automated safety check: Pass | Apache-2.0 | |
| LendingJoelLewis/finance_skills | 205 | — | ~2.5k | Automated safety check: Pass | MIT | |
| Cre Legalahacker-1/cre-agent-skills | 113 | — | ~1.3k | Automated safety check: Pass | Apache-2.0 | |
| Cre Officeahacker-1/cre-agent-skills | 113 | — | ~1.3k | Automated safety check: Pass | Apache-2.0 |
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Related
Categories
Questions about Cap Rate Calculator
What does Cap Rate Calculator do?
Real estate yield calculator. An agent skill from revfactory/harness-100. Cap Rate Calculator is an agent skill from revfactory/harness-100. Real estate yield calculator.
When should I use Cap Rate Calculator?
Cap Rate Calculator fits situations like: requests involving Cap Rate; cash flow analysis.
How do I install Cap Rate Calculator in Claude Code?
Run `npx skills add revfactory/harness-100 --skill cap-rate-calculator -a claude-code`. Or copy the skill folder (en/96-real-estate-analyst/.claude/skills/cap-rate-calculator in revfactory/harness-100) into .claude/skills/cap-rate-calculator in your project. Claude Code loads it when a task matches its description.
How do I install Cap Rate Calculator in Codex?
Run `npx skills add revfactory/harness-100 --skill cap-rate-calculator -a codex`. Or copy the skill folder (en/96-real-estate-analyst/.claude/skills/cap-rate-calculator in revfactory/harness-100) into .agents/skills/cap-rate-calculator in your project. Codex loads it when a task matches its description.
Can I use Cap Rate Calculator 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 revfactory/harness-100 --skill cap-rate-calculator -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-rate-calculator, .gemini/skills/cap-rate-calculator, .github/skills/cap-rate-calculator and .opencode/skills/cap-rate-calculator in your project.
What does Cap Rate Calculator need to run?
SKILL.md names no scripts, command-line tools or credentials: Cap Rate Calculator is instructions for the agent only.
Does Cap Rate Calculator 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 Cap Rate Calculator 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 Rate Calculator use?
Cap Rate Calculator is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Cap Rate Calculator use?
About 1k tokens (SKILL.md is roughly 4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Cap Rate Calculator?
Skills that share tags, products or a category with Cap Rate Calculator: Master Builder (ibuilder/massing, 122 stars), Cre Industrial (ahacker-1/cre-agent-skills, 113 stars), Lending (JoelLewis/finance_skills, 205 stars) and Cre Legal (ahacker-1/cre-agent-skills, 113 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Cap Rate Calculator?
revfactory (a GitHub user) maintains it in revfactory/harness-100, which has 1,295 GitHub stars. The repository holds 464 skills in this directory. The repository was last updated on March 22, 2026.
Source: revfactory/harness-100 on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.