diff --git a/skills/continuous-learning-v2/scripts/detect-project.sh b/skills/continuous-learning-v2/scripts/detect-project.sh
index 47b1e363..8cf1be2d 100755
--- a/skills/continuous-learning-v2/scripts/detect-project.sh
+++ b/skills/continuous-learning-v2/scripts/detect-project.sh
@@ -79,7 +79,11 @@ _clv2_detect_project() {
   fi
 
   # Derive project name from directory basename
-  project_name=$(basename "$project_root")
+  # Normalize Windows backslashes so basename works when CLAUDE_PROJECT_DIR
+  # is passed as e.g. C:\Users\...\project.
+  local _norm_root
+  _norm_root=$(printf '%s' "$project_root" | sed 's|\\|/|g')
+  project_name=$(basename "$_norm_root")
 
   # Derive project ID: prefer git remote URL hash (portable across machines),
   # fall back to path hash (machine-specific but still useful)
@@ -100,8 +104,15 @@ _clv2_detect_project() {
 
   local hash_input="${remote_url:-$project_root}"
   # Prefer Python for consistent SHA256 behavior across shells/platforms.
+  # Pass the value via env var and encode as UTF-8 inside Python so the hash
+  # is locale-independent (shells vary between UTF-8 / CP932 / CP1252, which
+  # would otherwise produce different hashes for the same non-ASCII path).
   if [ -n "$_CLV2_PYTHON_CMD" ]; then
-    project_id=$(printf '%s' "$hash_input" | "$_CLV2_PYTHON_CMD" -c "import sys,hashlib; print(hashlib.sha256(sys.stdin.buffer.read()).hexdigest()[:12])" 2>/dev/null)
+    project_id=$(_CLV2_HASH_INPUT="$hash_input" "$_CLV2_PYTHON_CMD" -c '
+import os, hashlib
+s = os.environ["_CLV2_HASH_INPUT"]
+print(hashlib.sha256(s.encode("utf-8")).hexdigest()[:12])
+' 2>/dev/null)
   fi
 
   # Fallback if Python is unavailable or hash generation failed.
@@ -115,7 +126,11 @@ _clv2_detect_project() {
   # check if a project dir exists under the legacy hash and reuse it
   if [ "$legacy_hash_input" != "$hash_input" ] && [ -n "$_CLV2_PYTHON_CMD" ]; then
     local legacy_id=""
-    legacy_id=$(printf '%s' "$legacy_hash_input" | "$_CLV2_PYTHON_CMD" -c "import sys,hashlib; print(hashlib.sha256(sys.stdin.buffer.read()).hexdigest()[:12])" 2>/dev/null)
+    legacy_id=$(_CLV2_HASH_INPUT="$legacy_hash_input" "$_CLV2_PYTHON_CMD" -c '
+import os, hashlib
+s = os.environ["_CLV2_HASH_INPUT"]
+print(hashlib.sha256(s.encode("utf-8")).hexdigest()[:12])
+' 2>/dev/null)
     if [ -n "$legacy_id" ] && [ -d "${_CLV2_PROJECTS_DIR}/${legacy_id}" ] && [ ! -d "${_CLV2_PROJECTS_DIR}/${project_id}" ]; then
       # Migrate legacy directory to new hash
       mv "${_CLV2_PROJECTS_DIR}/${legacy_id}" "${_CLV2_PROJECTS_DIR}/${project_id}" 2>/dev/null || project_id="$legacy_id"