diff --git a/BUILD.md b/BUILD.md
index 2ba90dd..67d85e8 100644
--- a/BUILD.md
+++ b/BUILD.md
@@ -1,6 +1,6 @@
 # Clawdie ISO Builder
 
-On `xfce-operator-usb`, builds a bootable FreeBSD 15.0 operator USB image with:
+On `xfce-operator-usb`, builds a bootable FreeBSD 15.x operator USB image with:
 
 - XFCE desktop
 - pre-SDDM live GPU detection
@@ -41,7 +41,7 @@ sudo pkg install -y curl node24 npm-node24 sudo
 
 Also required:
 
-- FreeBSD 15.0+
+- FreeBSD 15.x
 - 150 GB free build space recommended
 - root or `sudo` for image assembly
 - 32 GB USB key minimum for the current default `IMAGE_SIZE=28G`
@@ -400,7 +400,7 @@ The build header shows:
 
 ```text
 ISO     : <iso-version>-dev
-FreeBSD : 15.0-RELEASE amd64
+FreeBSD : 15.x-RELEASE amd64
 Clawdie : main
 Clawdie commit: <resolved-sha>
 ```
diff --git a/README.md b/README.md
index 4f29906..cdd88a0 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ bundled Clawdie-AI from `main`. Public release images should use
 
 Boot a USB and land in an operator environment:
 
-- FreeBSD 15.0 base system
+- FreeBSD 15.x base system
 - XFCE desktop via SDDM interactive login
 - pre-SDDM live GPU detection for Intel, AMD/ATI, VMware, and NVIDIA auto-detection with a universal driver lane
 - Firefox browser on the live image
@@ -103,7 +103,7 @@ session wrapper, but docs should teach `clawdie-gui` as the stable command.
 
 Build host:
 
-- FreeBSD 15.0+
+- FreeBSD 15.x
 - `pkg`, `curl`, Node/npm, `sudo`
 - root or `sudo` for image assembly (`mdconfig`, mount, bootcode)
 - 150 GB free build space recommended
@@ -158,7 +158,7 @@ The build prints provenance similar to:
 
 ```text
 ISO     : <iso-version>-dev
-FreeBSD : 15.0-RELEASE amd64
+FreeBSD : 15.x-RELEASE amd64
 Clawdie : main
 Clawdie commit: <sha>
 ```
diff --git a/REQUIREMENTS.md b/REQUIREMENTS.md
index 650ed9a..ddd62ad 100644
--- a/REQUIREMENTS.md
+++ b/REQUIREMENTS.md
@@ -8,7 +8,7 @@ Build and test requirements for the current unified Clawdie operator USB branch.
 
 Before building:
 
-- [ ] FreeBSD 15.0+ build host
+- [ ] FreeBSD 15.x build host
 - [ ] 150 GB free build space recommended
 - [ ] 32 GB USB key minimum (`IMAGE_SIZE=28G`)
 - [ ] Internet access for fetch phase
@@ -25,7 +25,7 @@ Before booting/testing:
 
 ### Operating System
 
-- FreeBSD 15.0+
+- FreeBSD 15.x
 - ZFS recommended for comfortable build storage, but not required by `build.sh`
 
 ### Packages
diff --git a/build.cfg b/build.cfg
index db29694..e74487e 100644
--- a/build.cfg
+++ b/build.cfg
@@ -2,7 +2,7 @@
 # clawdie-iso build configuration
 # Sourced by build.sh — edit before building
 
-FREEBSD_VERSION="15.0-RELEASE"
+FREEBSD_VERSION="${FREEBSD_VERSION:-15.1-RELEASE}"
 FREEBSD_ARCH="amd64"
 FREEBSD_RELEASE_SERIES="${FREEBSD_VERSION%-RELEASE}"
 FREEBSD_ISO_BASE_URL="https://download.freebsd.org/releases/${FREEBSD_ARCH}/${FREEBSD_ARCH}/ISO-IMAGES/${FREEBSD_RELEASE_SERIES}"
diff --git a/skills/iso-build/SKILL.md b/skills/iso-build/SKILL.md
index db82198..316fae3 100644
--- a/skills/iso-build/SKILL.md
+++ b/skills/iso-build/SKILL.md
@@ -316,8 +316,8 @@ Mounted-image checks should confirm:
 
 If you plan another rebuild soon, keep:
 
-- `tmp/cache/FreeBSD-15.0-RELEASE-amd64-memstick.img`
-- `tmp/cache/FreeBSD-15.0-RELEASE-amd64-memstick.img.SHA256`
+- `tmp/cache/FreeBSD-15.x-RELEASE-amd64-memstick.img`
+- `tmp/cache/FreeBSD-15.x-RELEASE-amd64-memstick.img.SHA256`
 - `tmp/packages/`
 - `tmp/npm-globals/`