Capacity Planning

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name: capacity-planning
description: "Produce a capacity planning document for a service covering traffic forecasts, resource requirements, and scaling strategy. Use when asked to plan infrastructure capacity, forecast resource needs, model traffic growth, define scaling strategy, or produce a capacity review for a service. Produces a structured capacity plan covering current baseline metrics, growth projections, resource requirements per tier, scaling strategy, cost projections, capacity triggers, and an infrastructure action roadmap."
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# Capacity Planning Skill

Produce a complete capacity planning document for a service. Capacity planning is not about predicting the future exactly — it is about understanding current headroom, modelling growth, and ensuring the team takes infrastructure action before a constraint becomes an incident.

A good capacity plan answers: what is running out first, how long before it runs out, what does it cost to fix it, and who decides when to act.

## Required Inputs

Ask for these if not already provided:
- **Service name and description** — what the service does and who depends on it
- **Current traffic and usage metrics** — requests per second (or per day), active users, data volume — whatever units are most natural for this service
- **Current resource utilisation** — CPU %, memory %, disk usage, connection pool utilisation, DB query throughput
- **Growth rate or projections** — historical growth rate, or known upcoming events (product launch, sales cycle, seasonal peak)
- **Tech stack and infrastructure** — cloud provider, compute type (VMs, containers, serverless), database, caching layer, CDN
- **Cost constraints** — current infrastructure spend, acceptable cost ceiling, or target cost per unit of traffic

## Output Format

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