Every Claude session starts from zero. There is no memory of what happened an hour ago, no record of the decision you made on Tuesday, no awareness that the architecture you discussed last week has already been built and deployed. When you open a new conversation, the model is, from its own perspective, meeting you for the first time.
For a one-off task -- summarize this document, fix this function, answer this question -- that is fine. The cost of a blank slate is zero when the task lives entirely within a single session. But the moment your work spans multiple sessions, the blank slate becomes something you pay for, repeatedly, in time and attention.
I discovered just how expensive that payment is when I built a fleet of ten scheduled agents to run autonomously around the clock.
What re-orientation actually looks like
When an agent starts a session without any memory of prior work, the first thing it does is reconstruct context. It reads files to understand what was done before. It checks logs. It inspects recent git history. It infers the current state of the system from artifacts rather than from its own prior knowledge. None of that is useful work -- it is overhead, paid up front on every run.
