Algorithms

A Stream Deck has five session keys. I usually have six or seven Claude Code sessions running. When a new one shows up, the muscle memory test isn't "does the right session get evicted" — it's "do the four survivors stay on the keys they were already on." (Two bits of context for anyone new to the stack: Stream Deck is Elgato’s USB grid of programmable LCD keys, and a “session” here is a single Claude Code conversation — claude running in one terminal tab, with its own working directory, its own context window, its own history. LRU stands for “least-recently used,” the standard cache-eviction policy: when you need to make room, drop the entry nobody has touched in the longest time.)