koa-generic-session

Generic session middleware for Koa framework (current stable v2.3.1). Provides flexible session management with pluggable external stores (redis, mongo, etc.) and supports synchronous and generator-based session handling. Key differentiator: it only writes cookies when session data changes, supports rolling sessions, and exposes session ID via this.sessionId. Requires Node >=6 and Koa v2, with async/await support. Maintained by the Koa core team.