fix vm virtualization detection

CHANGELOG.md

@@ -7,6 +7,17 @@
 - Release artifacts and cross-compile CI now include `arm` and `arm64` for
   FreeBSD, OpenBSD, and NetBSD.
 
+### Fixed
+
+- QEMU/KVM lab guests on OpenBSD, NetBSD, DragonFly BSD, illumos, and Windows
+  now report `virtual: "kvm"` and `is_virtual: true` when native DMI/SMBIOS,
+  PCI, or WMI indicators expose the VM.
+- Full fact output now omits empty optional top-level networking strings, such
+  as illumos `networking.ip6`, `networking.netmask6`, `networking.network6`,
+  and `networking.scope6` when no primary IPv6 address is available.
+- Mountpoint entries with no stat, device, filesystem, or option data are now
+  omitted instead of rendering empty maps such as `mountpoints."/": {}`.
+
 ## v0.0.3 - 2026-06-18
 
 ### Added

docs/schema/facts.yaml

@@ -435,6 +435,7 @@ mountpoints.*:
   type: map
   description: A mounted filesystem, keyed by mount path.
   platforms: [linux, darwin, windows, freebsd, openbsd, netbsd, dragonfly, illumos]
+  conditional: true
 mountpoints.*.available:
   type: string
   description: The display amount of free space on the mount, such as 1.00 GiB.
@@ -590,6 +591,7 @@ networking.ip6:
   type: string
   description: The IPv6 address of the primary interface.
   platforms: [linux, darwin, windows, freebsd, openbsd, netbsd, dragonfly, illumos]
+  conditional: true
 networking.mac:
   type: string
   description: The MAC address of the primary interface.
@@ -607,6 +609,7 @@ networking.netmask6:
   type: string
   description: The IPv6 netmask of the primary interface.
   platforms: [linux, darwin, windows, freebsd, openbsd, netbsd, dragonfly, illumos]
+  conditional: true
 networking.network:
   type: string
   description: The IPv4 network of the primary interface.
@@ -615,6 +618,7 @@ networking.network6:
   type: string
   description: The IPv6 network of the primary interface.
   platforms: [linux, darwin, windows, freebsd, openbsd, netbsd, dragonfly, illumos]
+  conditional: true
 networking.primary:
   type: string
   description: The name of the primary interface.
@@ -623,6 +627,7 @@ networking.scope6:
   type: string
   description: The IPv6 scope of the primary interface, such as global or link.
   platforms: [linux, darwin, windows, freebsd, openbsd, netbsd, dragonfly, illumos]
+  conditional: true
 
 os.architecture:
   type: string

docs/supported-facts/darwin.md

@@ -101,7 +101,7 @@ $ facts --json
 | `memory.system.total_bytes` | `integer` | no | The total physical memory, in bytes. |
 | `memory.system.used` | `string` | no | The display amount of physical memory in use, such as 1.00 GiB. |
 | `memory.system.used_bytes` | `integer` | no | The physical memory in use, in bytes. |
-| `mountpoints.*` | `map` | no | A mounted filesystem, keyed by mount path. |
+| `mountpoints.*` | `map` | yes | A mounted filesystem, keyed by mount path. |
 | `mountpoints.*.available` | `string` | no | The display amount of free space on the mount, such as 1.00 GiB. |
 | `mountpoints.*.available_bytes` | `integer` | no | The free space on the mount, in bytes. |
 | `mountpoints.*.capacity` | `string` | no | The percentage of the mount's space in use. |
@@ -130,15 +130,15 @@ $ facts --json
 | `networking.interfaces.*.network6` | `string` | yes | The IPv6 network of the interface's first binding. |
 | `networking.interfaces.*.scope6` | `string` | yes | The IPv6 scope of the interface's first binding, such as global or link. |
 | `networking.ip` | `string` | no | The IPv4 address of the primary interface. |
-| `networking.ip6` | `string` | no | The IPv6 address of the primary interface. |
+| `networking.ip6` | `string` | yes | The IPv6 address of the primary interface. |
 | `networking.mac` | `string` | no | The MAC address of the primary interface. |
 | `networking.mtu` | `integer` | yes | The maximum transmission unit of the primary interface. |
 | `networking.netmask` | `string` | no | The IPv4 netmask of the primary interface. |
-| `networking.netmask6` | `string` | no | The IPv6 netmask of the primary interface. |
+| `networking.netmask6` | `string` | yes | The IPv6 netmask of the primary interface. |
 | `networking.network` | `string` | no | The IPv4 network of the primary interface. |
-| `networking.network6` | `string` | no | The IPv6 network of the primary interface. |
+| `networking.network6` | `string` | yes | The IPv6 network of the primary interface. |
 | `networking.primary` | `string` | no | The name of the primary interface. |
-| `networking.scope6` | `string` | no | The IPv6 scope of the primary interface, such as global or link. |
+| `networking.scope6` | `string` | yes | The IPv6 scope of the primary interface, such as global or link. |
 | `os.architecture` | `string` | no | The operating system's hardware architecture, such as x86_64 or arm64. |
 | `os.family` | `string` | no | The operating system family, such as Debian, RedHat, Darwin, or windows. |
 | `os.hardware` | `string` | no | The hardware model of the machine, such as x86_64. |

docs/supported-facts/dragonfly.md

@@ -115,7 +115,7 @@ $ facts --json
 | `memory.system.total_bytes` | `integer` | no | The total physical memory, in bytes. |
 | `memory.system.used` | `string` | no | The display amount of physical memory in use, such as 1.00 GiB. |
 | `memory.system.used_bytes` | `integer` | no | The physical memory in use, in bytes. |
-| `mountpoints.*` | `map` | no | A mounted filesystem, keyed by mount path. |
+| `mountpoints.*` | `map` | yes | A mounted filesystem, keyed by mount path. |
 | `mountpoints.*.available` | `string` | no | The display amount of free space on the mount, such as 1.00 GiB. |
 | `mountpoints.*.available_bytes` | `integer` | no | The free space on the mount, in bytes. |
 | `mountpoints.*.capacity` | `string` | no | The percentage of the mount's space in use. |
@@ -145,15 +145,15 @@ $ facts --json
 | `networking.interfaces.*.operational_state` | `string` | yes | The operational state of the interface, such as up or down. |
 | `networking.interfaces.*.scope6` | `string` | yes | The IPv6 scope of the interface's first binding, such as global or link. |
 | `networking.ip` | `string` | no | The IPv4 address of the primary interface. |
-| `networking.ip6` | `string` | no | The IPv6 address of the primary interface. |
+| `networking.ip6` | `string` | yes | The IPv6 address of the primary interface. |
 | `networking.mac` | `string` | no | The MAC address of the primary interface. |
 | `networking.mtu` | `integer` | yes | The maximum transmission unit of the primary interface. |
 | `networking.netmask` | `string` | no | The IPv4 netmask of the primary interface. |
-| `networking.netmask6` | `string` | no | The IPv6 netmask of the primary interface. |
+| `networking.netmask6` | `string` | yes | The IPv6 netmask of the primary interface. |
 | `networking.network` | `string` | no | The IPv4 network of the primary interface. |
-| `networking.network6` | `string` | no | The IPv6 network of the primary interface. |
+| `networking.network6` | `string` | yes | The IPv6 network of the primary interface. |
 | `networking.primary` | `string` | no | The name of the primary interface. |
-| `networking.scope6` | `string` | no | The IPv6 scope of the primary interface, such as global or link. |
+| `networking.scope6` | `string` | yes | The IPv6 scope of the primary interface, such as global or link. |
 | `os.architecture` | `string` | no | The operating system's hardware architecture, such as x86_64 or arm64. |
 | `os.family` | `string` | no | The operating system family, such as Debian, RedHat, Darwin, or windows. |
 | `os.hardware` | `string` | no | The hardware model of the machine, such as x86_64. |

docs/supported-facts/freebsd.md

@@ -116,7 +116,7 @@ $ facts --json
 | `memory.system.total_bytes` | `integer` | no | The total physical memory, in bytes. |
 | `memory.system.used` | `string` | no | The display amount of physical memory in use, such as 1.00 GiB. |
 | `memory.system.used_bytes` | `integer` | no | The physical memory in use, in bytes. |
-| `mountpoints.*` | `map` | no | A mounted filesystem, keyed by mount path. |
+| `mountpoints.*` | `map` | yes | A mounted filesystem, keyed by mount path. |
 | `mountpoints.*.available` | `string` | no | The display amount of free space on the mount, such as 1.00 GiB. |
 | `mountpoints.*.available_bytes` | `integer` | no | The free space on the mount, in bytes. |
 | `mountpoints.*.capacity` | `string` | no | The percentage of the mount's space in use. |
@@ -147,15 +147,15 @@ $ facts --json
 | `networking.interfaces.*.operational_state` | `string` | yes | The operational state of the interface, such as up or down. |
 | `networking.interfaces.*.scope6` | `string` | yes | The IPv6 scope of the interface's first binding, such as global or link. |
 | `networking.ip` | `string` | no | The IPv4 address of the primary interface. |
-| `networking.ip6` | `string` | no | The IPv6 address of the primary interface. |
+| `networking.ip6` | `string` | yes | The IPv6 address of the primary interface. |
 | `networking.mac` | `string` | no | The MAC address of the primary interface. |
 | `networking.mtu` | `integer` | yes | The maximum transmission unit of the primary interface. |
 | `networking.netmask` | `string` | no | The IPv4 netmask of the primary interface. |
-| `networking.netmask6` | `string` | no | The IPv6 netmask of the primary interface. |
+| `networking.netmask6` | `string` | yes | The IPv6 netmask of the primary interface. |
 | `networking.network` | `string` | no | The IPv4 network of the primary interface. |
-| `networking.network6` | `string` | no | The IPv6 network of the primary interface. |
+| `networking.network6` | `string` | yes | The IPv6 network of the primary interface. |
 | `networking.primary` | `string` | no | The name of the primary interface. |
-| `networking.scope6` | `string` | no | The IPv6 scope of the primary interface, such as global or link. |
+| `networking.scope6` | `string` | yes | The IPv6 scope of the primary interface, such as global or link. |
 | `os.architecture` | `string` | no | The operating system's hardware architecture, such as x86_64 or arm64. |
 | `os.family` | `string` | no | The operating system family, such as Debian, RedHat, Darwin, or windows. |
 | `os.hardware` | `string` | no | The hardware model of the machine, such as x86_64. |

docs/supported-facts/illumos.md

@@ -134,7 +134,7 @@ $ facts --json
 | `memory.system.total_bytes` | `integer` | no | The total physical memory, in bytes. |
 | `memory.system.used` | `string` | no | The display amount of physical memory in use, such as 1.00 GiB. |
 | `memory.system.used_bytes` | `integer` | no | The physical memory in use, in bytes. |
-| `mountpoints.*` | `map` | no | A mounted filesystem, keyed by mount path. |
+| `mountpoints.*` | `map` | yes | A mounted filesystem, keyed by mount path. |
 | `mountpoints.*.available` | `string` | no | The display amount of free space on the mount, such as 1.00 GiB. |
 | `mountpoints.*.available_bytes` | `integer` | no | The free space on the mount, in bytes. |
 | `mountpoints.*.capacity` | `string` | no | The percentage of the mount's space in use. |
@@ -163,15 +163,15 @@ $ facts --json
 | `networking.interfaces.*.network6` | `string` | yes | The IPv6 network of the interface's first binding. |
 | `networking.interfaces.*.scope6` | `string` | yes | The IPv6 scope of the interface's first binding, such as global or link. |
 | `networking.ip` | `string` | no | The IPv4 address of the primary interface. |
-| `networking.ip6` | `string` | no | The IPv6 address of the primary interface. |
+| `networking.ip6` | `string` | yes | The IPv6 address of the primary interface. |
 | `networking.mac` | `string` | no | The MAC address of the primary interface. |
 | `networking.mtu` | `integer` | yes | The maximum transmission unit of the primary interface. |
 | `networking.netmask` | `string` | no | The IPv4 netmask of the primary interface. |
-| `networking.netmask6` | `string` | no | The IPv6 netmask of the primary interface. |
+| `networking.netmask6` | `string` | yes | The IPv6 netmask of the primary interface. |
 | `networking.network` | `string` | no | The IPv4 network of the primary interface. |
-| `networking.network6` | `string` | no | The IPv6 network of the primary interface. |
+| `networking.network6` | `string` | yes | The IPv6 network of the primary interface. |
 | `networking.primary` | `string` | no | The name of the primary interface. |
-| `networking.scope6` | `string` | no | The IPv6 scope of the primary interface, such as global or link. |
+| `networking.scope6` | `string` | yes | The IPv6 scope of the primary interface, such as global or link. |
 | `os.architecture` | `string` | no | The operating system's hardware architecture, such as x86_64 or arm64. |
 | `os.family` | `string` | no | The operating system family, such as Debian, RedHat, Darwin, or windows. |
 | `os.hardware` | `string` | no | The hardware model of the machine, such as x86_64. |

docs/supported-facts/linux.md

@@ -155,7 +155,7 @@ $ facts --json
 | `memory.system.total_bytes` | `integer` | no | The total physical memory, in bytes. |
 | `memory.system.used` | `string` | no | The display amount of physical memory in use, such as 1.00 GiB. |
 | `memory.system.used_bytes` | `integer` | no | The physical memory in use, in bytes. |
-| `mountpoints.*` | `map` | no | A mounted filesystem, keyed by mount path. |
+| `mountpoints.*` | `map` | yes | A mounted filesystem, keyed by mount path. |
 | `mountpoints.*.available` | `string` | no | The display amount of free space on the mount, such as 1.00 GiB. |
 | `mountpoints.*.available_bytes` | `integer` | no | The free space on the mount, in bytes. |
 | `mountpoints.*.capacity` | `string` | no | The percentage of the mount's space in use. |
@@ -188,15 +188,15 @@ $ facts --json
 | `networking.interfaces.*.scope6` | `string` | yes | The IPv6 scope of the interface's first binding, such as global or link. |
 | `networking.interfaces.*.speed` | `integer` | yes | The negotiated speed of the interface, in Mbit/s. |
 | `networking.ip` | `string` | no | The IPv4 address of the primary interface. |
-| `networking.ip6` | `string` | no | The IPv6 address of the primary interface. |
+| `networking.ip6` | `string` | yes | The IPv6 address of the primary interface. |
 | `networking.mac` | `string` | no | The MAC address of the primary interface. |
 | `networking.mtu` | `integer` | yes | The maximum transmission unit of the primary interface. |
 | `networking.netmask` | `string` | no | The IPv4 netmask of the primary interface. |
-| `networking.netmask6` | `string` | no | The IPv6 netmask of the primary interface. |
+| `networking.netmask6` | `string` | yes | The IPv6 netmask of the primary interface. |
 | `networking.network` | `string` | no | The IPv4 network of the primary interface. |
-| `networking.network6` | `string` | no | The IPv6 network of the primary interface. |
+| `networking.network6` | `string` | yes | The IPv6 network of the primary interface. |
 | `networking.primary` | `string` | no | The name of the primary interface. |
-| `networking.scope6` | `string` | no | The IPv6 scope of the primary interface, such as global or link. |
+| `networking.scope6` | `string` | yes | The IPv6 scope of the primary interface, such as global or link. |
 | `os.architecture` | `string` | no | The operating system's hardware architecture, such as x86_64 or arm64. |
 | `os.distro.codename` | `string` | yes | The codename of the distribution release, such as noble. |
 | `os.distro.description` | `string` | no | The full description of the distribution release. |

docs/supported-facts/netbsd.md

@@ -131,7 +131,7 @@ $ facts --json
 | `memory.system.total_bytes` | `integer` | no | The total physical memory, in bytes. |
 | `memory.system.used` | `string` | no | The display amount of physical memory in use, such as 1.00 GiB. |
 | `memory.system.used_bytes` | `integer` | no | The physical memory in use, in bytes. |
-| `mountpoints.*` | `map` | no | A mounted filesystem, keyed by mount path. |
+| `mountpoints.*` | `map` | yes | A mounted filesystem, keyed by mount path. |
 | `mountpoints.*.available` | `string` | no | The display amount of free space on the mount, such as 1.00 GiB. |
 | `mountpoints.*.available_bytes` | `integer` | no | The free space on the mount, in bytes. |
 | `mountpoints.*.capacity` | `string` | no | The percentage of the mount's space in use. |
@@ -159,15 +159,15 @@ $ facts --json
 | `networking.interfaces.*.operational_state` | `string` | yes | The operational state of the interface, such as up or down. |
 | `networking.interfaces.*.scope6` | `string` | yes | The IPv6 scope of the interface's first binding, such as global or link. |
 | `networking.ip` | `string` | no | The IPv4 address of the primary interface. |
-| `networking.ip6` | `string` | no | The IPv6 address of the primary interface. |
+| `networking.ip6` | `string` | yes | The IPv6 address of the primary interface. |
 | `networking.mac` | `string` | no | The MAC address of the primary interface. |
 | `networking.mtu` | `integer` | yes | The maximum transmission unit of the primary interface. |
 | `networking.netmask` | `string` | no | The IPv4 netmask of the primary interface. |
-| `networking.netmask6` | `string` | no | The IPv6 netmask of the primary interface. |
+| `networking.netmask6` | `string` | yes | The IPv6 netmask of the primary interface. |
 | `networking.network` | `string` | no | The IPv4 network of the primary interface. |
-| `networking.network6` | `string` | no | The IPv6 network of the primary interface. |
+| `networking.network6` | `string` | yes | The IPv6 network of the primary interface. |
 | `networking.primary` | `string` | no | The name of the primary interface. |
-| `networking.scope6` | `string` | no | The IPv6 scope of the primary interface, such as global or link. |
+| `networking.scope6` | `string` | yes | The IPv6 scope of the primary interface, such as global or link. |
 | `os.architecture` | `string` | no | The operating system's hardware architecture, such as x86_64 or arm64. |
 | `os.family` | `string` | no | The operating system family, such as Debian, RedHat, Darwin, or windows. |
 | `os.hardware` | `string` | no | The hardware model of the machine, such as x86_64. |