abkslmandClaude Opus 4.8
9d4999bb74
Adds a per-project "Allow host build/run" sandbox capability that lets a containerized agent request to build and run executables on the host machine, escaping the Linux sandbox — e.g. compiling and running a macOS binary the container can't. - New `host_exec` MCP tool on the approval server, advertised only when the session opts in. Pre-allowed via --allowedTools so the call reaches our handler directly rather than Claude's permission path: the handler is the sole gate, so `auto` mode can never auto-approve it. - Every host command surfaces an explicit approval (risk .hostExec) and runs on the host via /bin/zsh -lc in the session worktree only after approval. An explicit "Allow for Session" choice grants the rest of the session; auto-approve never sets that — only a deliberate user choice does. - ProjectSandbox.allowHostExec (off by default) with tolerant decoding so rows persisted before the field default to false instead of dropping the whole sandbox config. - Threaded allowHostExec through RunSpec/ResumeSpec/SessionController; Mac Project Settings toggle; Mac ApprovalBar "Allow for Session" button; iOS risk styling/biometric gate for .hostExec. - Tests: host_exec advertised/served only when registered + refused otherwise; allowHostExec round-trip and legacy-JSON default-to-false. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>