diff --git a/.github/workflows/release-pr.yml b/.github/workflows/release-pr.yml
index 6b04c84..9e744d2 100644
--- a/.github/workflows/release-pr.yml
+++ b/.github/workflows/release-pr.yml
@@ -81,7 +81,14 @@ jobs:
           
           # Use custom version if provided
           if [ -n "${{ inputs.custom_version }}" ]; then
-            NEW_VERSION="${{ inputs.custom_version }}"
+            CUSTOM="${{ inputs.custom_version }}"
+            # Strip optional 'v' prefix and validate strict semver (X.Y.Z)
+            CUSTOM="${CUSTOM#v}"
+            if [[ ! "$CUSTOM" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+              echo "::error::Invalid custom version '${{ inputs.custom_version }}'. Must be semver (e.g., 1.2.3 or v1.2.3)."
+              exit 1
+            fi
+            NEW_VERSION="$CUSTOM"
           else
             # Determine bump type
             if [ "${{ inputs.version_type }}" == "auto" ]; then
@@ -158,7 +165,7 @@ jobs:
           fi
           
           # Other changes (refactor, perf, style, or non-conventional commits)
-          OTHERS=$(echo "$COMMITS" | grep -ivE "^(feat|fix|chore|ci|docs|test)(\(.+\))?:" | head -10 | sed 's/^/- /' || true)
+          OTHERS=$(echo "$COMMITS" | grep -ivE "^(feat|fix|chore|ci|docs|test)(\(.+\))?:" | sed 's/^/- /' || true)
           if [ -n "$OTHERS" ]; then
             ENTRY+="### Changed"$'\n'"$OTHERS"$'\n\n'
           fi