Parallel checkouts collided on the compose subnet, host ports and container
names, so a quality run in a worktree died at compose-up. Slot each checkout
via custom.env and layer two overrides on top: the shared cache network in
place of a second cache stack, and the shared .git directory without which
git aborts inside the container.
Both overlays gate on the resource they need, not on the slot number, so a
stray INFINITO_INSTANCE cannot make compose demand a value nobody set.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
kevinveenbirkenbachandClaude Opus 5