Runway Planner Skill

Runway is the number that decides everything else. This skill turns cash and burn into months of runway, a default-alive/dead verdict (à la Paul Graham), and the dated triggers for when to raise or cut — so the founder isn't surprised. Not financial advice; confirm with your finance lead.

Working from a brief

Given partial numbers, do the full calculation anyway with labelled illustrative figures where needed. Show the arithmetic. Never leave it as "[calculate runway]."

Required Inputs

Ask for (if not already provided), else use clearly-labelled illustrative numbers:

• Cash in bank today
• Monthly net burn (gross burn minus revenue) and whether it's growing
• Revenue today and its growth rate (if any)
• Planned changes — hires, spend increases, or cuts being considered
• Context — when they last raised, what they're optimising for

Output Format

1. Runway today

• Net burn: $X/mo · Cash: $Y · Runway: Y ÷ X = N months (to ~[month/year])
• If burn is growing or revenue ramping, show a simple month-by-month projection, not just a flat divide.

2. Default-alive or default-dead?

On current growth and burn, will revenue cover costs before the money runs out? State the verdict and the gap.

3. Scenarios

Scenario	Net burn	Runway	Effect
Current
With planned hires
Lean (cuts)

4. Trigger points (dated)

• Start raising by: [date] — typically when ~6 months of runway remain (raising takes 3–6 months)
• Decision/cut point: [date] — if [milestone] isn't hit, what changes