Files, skills and memory tools

When a session ends, the only things that survive are things written somewhere outside the context window. The simplest "somewhere" is a file, and the Claude ecosystem has converged on files as its main memory abstraction: CLAUDE.md for instructions people write, auto memory for notes Claude writes about you, skills for procedures, a memory tool that reads and writes a /memories directory you host, and memory stores that Managed Agents mount into the sandbox. They differ in who writes them, when they load, how they are scoped and how they are deleted. For a conveyancing fleet those differences decide whether a matter's details stay in the matter.