In this channel's material, cross-session persistence describes how Claude Code's Tasks system stores its task ledger outside any single session — in a tasks folder in the home directory, with an environment variable for shared lists — so that work survives from one session to the next [^01a0f15a-b089-7af8-a043-1786fa8de18a@1342]. Trevor frames the motivation: agents were burning enormous time and tokens rewriting markdown ledgers and going back into original brainstorm and plan files just to keep them current. The brainstorm should seed the plan; the plan is a snapshot in time, not the running ledger of work — moving the ledger out of the session removes that overhead entirely [^01a0f15a-b089-7af8-a043-1786fa8de18a@235] [^01a0f15a-b089-7af8-a043-1786fa8de18a@246].