fix: move msg file inside worktree to avoid external_directory permission error

The message passed to opencode run contains newlines and special
characters (parentheses, etc.) which break shell parsing when passed
directly in double quotes.

Fix by writing message to temp file and using '@msg_file' syntax
to pass to opencode run. This handles any characters in the message.

skills/kugetsu/scripts/kugetsu-config.sh

@@ -32,7 +32,7 @@ if [ -f "$KUGETSU_DIR/config" ]; then
 fi
 
 mask_sensitive_vars() {
-    local line="$1"
+    local line="${1:-}"
     for var in GITEA_TOKEN GITHUB_TOKEN GITLAB_TOKEN API_KEY PASSWORD TOKEN SECRET; do
         if [[ "$line" =~ $var ]]; then
             line=$(echo "$line" | sed -E "s/=.*/=***MASKED***/")
@@ -41,6 +41,11 @@ mask_sensitive_vars() {
     echo "$line"
 }
 
+strip_ansi_codes() {
+    local line="${1:-}"
+    echo "$line" | sed 's/\x1b\[[0-9;]*m//g' | sed 's/\x1b\[[0-9;]*[a-zA-Z]//g'
+}
+
 load_agent_env() {
     local agent_type="${1:-base}"
     local env_file="$ENV_DIR/${agent_type}.env"

skills/kugetsu/scripts/kugetsu-log.sh

@@ -24,7 +24,9 @@ cmd_logs() {
             echo ""
             echo "--- $log ---"
             tail -20 "$LOGS_DIR/$log" | while read line; do
-                echo "  $(mask_sensitive_vars "$line")"
+                line=$(strip_ansi_codes "$line")
+                line=$(mask_sensitive_vars "$line")
+                echo "  $line"
             done
         fi
     done

skills/kugetsu/scripts/kugetsu-session.sh

@@ -225,7 +225,10 @@ cmd_delegate() {
         exit 1
     fi
     
-    nohup sh -c "GITEA_TOKEN='${GITEA_TOKEN:-}' opencode run '$message' --session '$new_session'" >> "$log_file" 2>&1 &
+    local msg_file="$LOGS_DIR/msg-$new_session.txt"
+    printf '%s' "$message" > "$msg_file"
+    nohup sh -c "GITEA_TOKEN='${GITEA_TOKEN:-}' opencode run '@$msg_file' --session '$new_session'" >> "$log_file" 2>&1 &
+    rm -f "$msg_file"
     echo "Delegated to new session (logged to $(basename "$log_file"))"
 }
 
@@ -238,20 +241,22 @@ create_session() {
     fi
     
     local before_json=$(opencode session list --format=json 2>/dev/null)
-    local before_ids=$(echo "$before_json" | python3 -c "import sys,json; sessions=json.load(sys.stdin); print(' '.join(s['id'] for s in sessions))" 2>/dev/null || echo "")
+    local before_set=$(echo "$before_json" | python3 -c "import sys,json; sessions=json.load(sys.stdin); print('|'.join(s['id'] for s in sessions))" 2>/dev/null || echo "|")
     
-    opencode run --fork --session "$base_session" "new session" 2>/dev/null
+    opencode run --fork --session "$base_session" "new session" >/dev/null 2>&1
+    
+    sleep 1
     
     local after_json=$(opencode session list --format=json 2>/dev/null)
-    local after_ids=$(echo "$after_json" | python3 -c "import sys,json; sessions=json.load(sys.stdin); print(' '.join(s['id'] for s in sessions))" 2>/dev/null || echo "")
+    local after_sessions=$(echo "$after_json" | python3 -c "import sys,json; sessions=json.load(sys.stdin); [print(s['id']) for s in sessions]" 2>/dev/null || true)
     
     local new_session_id=""
-    for sess in $after_ids; do
-        if [[ ! " $before_ids " =~ " $sess " ]] && [[ "$sess" != "$base_session" ]]; then
+    while IFS= read -r sess; do
+        if [[ -n "$sess" ]] && [[ ! "$before_set" =~ \|${sess}\| ]]; then
             new_session_id="$sess"
             break
         fi
-    done
+    done <<< "$after_sessions"
     
     echo "$new_session_id"
 }
@@ -373,7 +378,11 @@ cmd_start() {
     load_agent_env "dev"
     
     cd "$worktree_path"
-    nohup sh -c "GITEA_TOKEN='${GITEA_TOKEN:-}' opencode run '$dev_message' --session '$new_session_id'" >> "$LOGS_DIR/dev-$new_session_id.log" 2>&1 &
+    local sanitized_id=$(echo "$new_session_id" | sed 's/[^a-zA-Z0-9_-]/_/g')
+    local msg_file="$worktree_path/.kugetsu-msg.txt"
+    printf '%s' "$dev_message" > "$msg_file"
+    nohup sh -c "GITEA_TOKEN='${GITEA_TOKEN:-}' opencode run '@$msg_file' --session '$new_session_id'" >> "$LOGS_DIR/dev-$sanitized_id.log" 2>&1 &
+    rm -f "$msg_file"
     
     echo "Session started for '$issue_ref': $new_session_id"
     echo "Worktree: $worktree_path"
@@ -436,7 +445,11 @@ cmd_continue() {
     fi
     
     cd "$worktree_path"
-    nohup sh -c "GITEA_TOKEN='${GITEA_TOKEN:-}' opencode run '$message' --session '$opencode_session_id'" >> "$LOGS_DIR/dev-$opencode_session_id.log" 2>&1 &
+    local sanitized_id=$(echo "$opencode_session_id" | sed 's/[^a-zA-Z0-9_-]/_/g')
+    local msg_file="$worktree_path/.kugetsu-msg.txt"
+    printf '%s' "$message" > "$msg_file"
+    nohup sh -c "GITEA_TOKEN='${GITEA_TOKEN:-}' opencode run '@$msg_file' --session '$opencode_session_id'" >> "$LOGS_DIR/dev-$sanitized_id.log" 2>&1 &
+    rm -f "$msg_file"
 }
 
 cmd_list() {