fix: remove race condition in cmd_delegate msg file deletion

cmd_delegate deletes the message file immediately after spawning the
background nohup process, causing a race condition where opencode run
may not have read the file yet.

Error: File not found: msg-ses_xxx.txt

Fix by removing rm -f "$msg_file", consistent with cmd_start and
cmd_continue which write to $worktree_path/.kugetsu-msg.txt and never
delete it. Orphaned msg files in $LOGS_DIR/ are harmless.

Fixes #210

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/${agent_type}.env"
@@ -59,3 +64,26 @@ load_agent_env() {
         set +a
     fi
 }
+
+set_debug_mode() {
+    local filtered_args=()
+    local debug_mode=false
+    
+    for arg in "$@"; do
+        case "$arg" in
+            --debug)
+                debug_mode=true
+                ;;
+            *)
+                filtered_args+=("$arg")
+                ;;
+        esac
+    done
+    
+    if [ "$debug_mode" = true ]; then
+        export KUGETSU_VERBOSITY="debug"
+        echo "[DEBUG] Debug mode enabled" >&2
+    fi
+    
+    echo "${filtered_args[@]}"
+}

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 +225,9 @@ 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 &
     echo "Delegated to new session (logged to $(basename "$log_file"))"
 }
 
@@ -238,20 +240,22 @@ 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
+    while IFS= read -r sess; do
-        if [[ ! " $before_ids " =~ " $sess " ]] && [[ "$sess" != "$base_session" ]]; then
+        if [[ -n "$sess" ]] && [[ ! "$before_set" =~ \|${sess}\| ]]; then
             new_session_id="$sess"
             break
         fi
-    done
+    done <<< "$after_sessions"
     
     echo "$new_session_id"
 }
@@ -373,7 +377,10 @@ 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 &
     
     echo "Session started for '$issue_ref': $new_session_id"
     echo "Worktree: $worktree_path"
@@ -436,7 +443,10 @@ 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 &
 }
 
 cmd_list() {