Individual skill
runway-calculator
Calculate cash runway, burn, and the zero-cash date — and whether you're default alive or dead. Use when asked to work out runway, monthly burn, when the money runs out, or how much to raise/cut to reach a target. Produces a computed runway summary (net burn, months of runway, zero-cash date, default alive/dead) plus what it takes to extend it.
skills/runway-calculator/SKILL.md
Source commit f7c90bc09ee05dc25cf257bdb1826f2c2552c2cb
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- Matches the observed repository HEAD
- Yes
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- Yes
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- No
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- Observed behavior
- Network or broad shell
- Last checked
- Nov 9, 2026
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- Repository stars (not skill ratings)
- 1,540
- Repository last updated
- Nov 10, 2026
- License
- MIT
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SKILL.mdcore · 3,399 bytesSKILL.mdcore · 3,399 bytesscripts/runway.pyruns · 3,780 bytes
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# Runway Calculator Skill
For any company spending more than it makes, one number governs everything: how many months of cash
are left. This skill computes net burn, runway, and the zero-cash date from your cash and P&L, judges
whether you're **default alive or dead** (Paul Graham's test — would you reach profitability on current
cash at current growth?), and shows the raise-or-cut needed to hit a target runway.
## Required Inputs
Ask for these only if they aren't already provided:
- **Cash in bank** (today).
- **Monthly revenue** and **monthly expenses** (or net monthly burn directly).
- **Monthly growth rate** of revenue, if you want the default-alive check.