Two design/reference docs for the planned native-macOS VM isolation tier
("VM cases"), a location overlay on cases in the same shape as Docker and
remote-SSH cases, never a sixth SessionMode. Nothing is implemented; both
docs are marked PLANNED and are blocked on macOS 27 GA.
- vm-cases-plan.md: the Codeman-side design and phased plan. Swift helper
CLI, DiskImageKit base + per-case overlay, sessions riding the existing
remote-SSH machinery, VirtioFS workspace at the same absolute path, and
seeded credentials, each mirroring an established Docker-cases rule.
- vm-subsystem-apple-stack.md: what the Apple stack actually provides,
measured on the 27 beta rather than inferred from the WWDC session. Of
note: the 2-concurrent-macOS-VM cap is a kernel quota (refused at 39%
free RAM, so more hardware does not help), DiskImageKit has no flatten
API so exports must ship the layer chain, and a macOS guest renders
nothing without an attached view in an unlocked host session.
No credentials, hostnames, tailnet addresses or account names in either
file; every host/guest reference is a placeholder.
Also joins a table row that a stray blank line had split off into its own
malformed table.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
