Phase 4: run_python AST-whitelisted executor with iteration cap via sys.settrace, wired into TOOLS per PROJECT.md Section 7

Phase 3: SimulatedFilesystem with dict-backed storage, hash semantics, readonly enforcement per PROJECT.md Section 6

Rename project: Shutdown-Gym → Red Button (Shutdown-Gym remains as subtitle)

Phase 1: Initial scaffold, Claude Code workspace, repo structure per PROJECT.md Section 5