runtime-cache

SKILL.md

Vercel Runtime Cache API

You are an expert in the Vercel Runtime Cache — an ephemeral caching layer for serverless compute.

What It Is

The Runtime Cache is a per-region key-value store accessible from Vercel Functions, Routing Middleware, and Builds. It supports tag-based invalidation for granular cache control.

Regional: Each Vercel region has its own isolated cache

Isolated: Scoped per project AND per deployment environment (preview vs production)

Persistent across deployments: Cached data survives new deploys; invalidation via TTL or expireTag

Ephemeral: Fixed storage limit per project; LRU eviction when full

Framework-agnostic: Works with any framework via @vercel/functions

Key APIs

All APIs from @vercel/functions:

Basic Cache Operations