fix: use temp file for message to avoid shell parsing issues

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***/")

skills/kugetsu/scripts/kugetsu-log.sh

@@ -1,40 +1,6 @@
 #!/bin/bash
 set -euo pipefail
 
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-source "$SCRIPT_DIR/kugetsu-config.sh"
-
-log() {
-    local level="${1:-}"
-    local component="${2:-}"
-    local message="${3:-}"
-    local timestamp
-    timestamp=$(date -Iseconds)
-
-    case "$level" in
-        info|warn|error|debug) ;;
-        *)
-            echo "Error: log level must be info|warn|error|debug" >&2
-            return 1
-            ;;
-    esac
-
-    if [ -z "$message" ]; then
-        message="$component"
-        component="${level}"
-        level="info"
-    fi
-
-    local masked
-    masked=$(mask_sensitive_vars "$message")
-    echo "[$timestamp] $level $component $masked"
-}
-
-log_debug() { log "debug" "$1" "${2:-}"; }
-log_info()  { log "info"  "$1" "${2:-}"; }
-log_warn()  { log "warn"  "$1" "${2:-}"; }
-log_error() { log "error" "$1" "${2:-}"; }
-
 cmd_logs() {
     local count="${1:-10}"
     

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"))"
 }
 
@@ -373,7 +376,10 @@ 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 msg_file="$LOGS_DIR/msg-$new_session_id.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-$new_session_id.log" 2>&1 &
+    rm -f "$msg_file"
     
     echo "Session started for '$issue_ref': $new_session_id"
     echo "Worktree: $worktree_path"
@@ -436,7 +442,10 @@ 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 msg_file="$LOGS_DIR/msg-$opencode_session_id.txt"
+    printf '%s' "$message" > "$msg_file"
+    nohup sh -c "GITEA_TOKEN='${GITEA_TOKEN:-}' opencode run '@$msg_file' --session '$opencode_session_id'" >> "$LOGS_DIR/dev-$opencode_session_id.log" 2>&1 &
+    rm -f "$msg_file"
 }
 
 cmd_list() {