Common questions · 4 min read
Why runs happen on a Mac, not mystery cloud VMs
Local files, harness rules, and clearer ownership for companies.
Uploading client folders to a random SaaS sandbox makes security teams nervous — often for good reason. Agent Witch dispatches to a known machine: yours or a colleague's, with harness rules about what the agent can touch.
What local execution gives you
- Files stay on the Mac that already has access
- Clear executor in job history — not "the platform"
- Company can set group dispatch and approval policies
- Audit trail: requester, prompt, result, timestamp
Tradeoffs you accept
- Executor must be online for send
- Each person maintains their own paired Mac
- Not a fit if you need 24/7 cloud runners with zero ops
Who this suits
Teams with Macs, sensitive repos, and repeat AI workflows who want delegation without shipping everything to a multi-tenant AI host. You still use Claude — the difference is where it runs and who can see the log.