S1/S2 per-test defaults and the mam_sandbox override, S3 submit with WORKSPACE_ROOT on a checkout leaves its .mam alone, S6 a nested pytest started with a pane's binding sees none of it (import-time copy included) and leaves the target untouched, S7 lib.sh takes the session registry from a test's WORKSPACE_ROOT.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Sdga4A8i1iSc8DaaW9iKU2