refactor(kugetsu): daemon uses cmd_start/cmd_continue instead of direct opencode calls

- Move issue_ref_to_filename and filename_to_issue_ref to kugetsu-index.sh
  (where they logically belong, instead of in main kugetsu script)
- Refactor queue daemon to use cmd_start/cmd_continue for session management
- Daemon now checks if worktree/session exists → cmd_continue, else → cmd_start
- Removes ~40 lines of direct opencode session forking logic from daemon
- cmd_start/cmd_continue handle worktree creation, session forking, and tracking

This simplifies the daemon significantly and centralizes session management
in kugetsu-session.sh where it belongs.

skills/kugetsu/scripts/kugetsu

@@ -99,17 +99,6 @@ ensure_worktree_dir() {
     mkdir -p "$WORKTREES_DIR"
 }
 
-issue_ref_to_filename() {
-    local issue_ref="$1"
-    echo "$issue_ref" | sed 's/[\/:]/-/g' | sed 's/#/-/'
-}
-
-filename_to_issue_ref() {
-    local filename="$1"
-    local name="${filename%.json}"
-    echo "$name" | sed 's/-\([0-9]*\)$/#\1/' | sed 's/-/\//g'
-}
-
 issue_ref_to_context_file() {
     local issue_ref="$1"
     local context_filename=$(issue_ref_to_filename "$issue_ref")

skills/kugetsu/scripts/kugetsu-index.sh

@@ -133,3 +133,16 @@ with open(session_path, 'w') as f:
     print(f"Updated PR URL for $issue_ref: $pr_url")
 PYEOF
 }
+
+# Convert issue ref to session filename
+issue_ref_to_filename() {
+    local issue_ref="$1"
+    echo "$issue_ref" | sed 's/[\/:]/-/g' | sed 's/#/-/'
+}
+
+# Convert session filename back to issue ref
+filename_to_issue_ref() {
+    local filename="$1"
+    local name="${filename%.json}"
+    echo "$name" | sed 's-\([0-9]*\)$-#\1-' | sed 's/-/\//g'
+}

skills/kugetsu/scripts/kugetsu-queue-daemon.sh

@@ -8,8 +8,58 @@ source "$SCRIPT_DIR/kugetsu-index.sh"
 source "$SCRIPT_DIR/kugetsu-worktree.sh"
 source "$SCRIPT_DIR/kugetsu-log.sh"
 
+# Load GITEA_TOKEN from default.env
+if [ -f "$HOME/.kugetsu/env/default.env" ]; then
+    source "$HOME/.kugetsu/env/default.env"
+fi
+
+# Check if a notified task has completed (forked session ended or has new commits)
+check_task_completion() {
+    local item="$1"
+    local queue_id=$(basename "$item" .json)
+    local state=$(python3 -c "import json; print(json.load(open('$item')).get('state', ''))" 2>/dev/null)
+    
+    [ "$state" = "notified" ] || return 0
+    
+    # Use opencode_session_id (the forked session, not the parent pm_session)
+    local session_id=$(python3 -c "import json; print(json.load(open('$item')).get('opencode_session_id', ''))" 2>/dev/null)
+    local issue_ref=$(python3 -c "import json; print(json.load(open('$item')).get('issue_ref', ''))" 2>/dev/null)
+    
+    # If no session tracked, skip
+    [ -n "$session_id" ] || return 0
+    
+    # Check if forked session still exists in opencode
+    if ! opencode session list 2>/dev/null | grep -q "$session_id"; then
+        # Forked session ended — check if work was done
+        local worktree_path=$(issue_ref_to_worktree_path "$issue_ref" "$HOME/.kugetsu-worktrees")
+        local has_commits=false
+        
+        if [ -d "$worktree_path" ] && [ -d "$worktree_path/.git" ]; then
+            # Check if worktree has new commits beyond origin/main
+            if [ -n "$(git -C "$worktree_path" log --oneline origin/main..HEAD 2>/dev/null)" ]; then
+                has_commits=true
+            fi
+        fi
+        
+        if [ "$has_commits" = true ]; then
+            update_queue_item_state "$queue_id" "completed"
+            echo "Task $queue_id ($issue_ref) completed — new commits found"
+        else
+            update_queue_item_state "$queue_id" "error"
+            echo "Task $queue_id ($issue_ref) marked error — no commits found after session ended"
+        fi
+    fi
+}
+
 while true; do
+    # Check completion of notified tasks
     if [ -d "$QUEUE_ITEMS_DIR" ]; then
+        for item in "$QUEUE_ITEMS_DIR"/*.json; do
+            [ -f "$item" ] || continue
+            check_task_completion "$item"
+        done
+        
+        # Process pending tasks
         for item in "$QUEUE_ITEMS_DIR"/*.json; do
             [ -f "$item" ] || continue
             state=$(python3 -c "import json; print(json.load(open('$item')).get('state', ''))" 2>/dev/null)
@@ -18,12 +68,23 @@ while true; do
                 issue_ref=$(python3 -c "import json; print(json.load(open('$item')).get('issue_ref', ''))" 2>/dev/null)
                 message=$(python3 -c "import json; print(json.load(open('$item')).get('message', ''))" 2>/dev/null)
                 
-                pm_session=$(get_pm_agent_session_id)
-                if [ -n "$pm_session" ] && [ "$pm_session" != "null" ]; then
+                # Source session management and use cmd_start/cmd_continue
+                source "$SCRIPT_DIR/kugetsu-session.sh"
+                
+                if worktree_exists "$issue_ref" "$HOME/.kugetsu-worktrees" || [ -f "$SESSIONS_DIR/$(issue_ref_to_filename "$issue_ref").json" ]; then
+                    # Continue existing session
                     log_file="$LOGS_DIR/delegate-$(date +%s).log"
-                    GITEA_TOKEN="${GITEA_TOKEN:-}" nohup sh -c "opencode run '$message' --continue --session '$pm_session' >> '$log_file' 2>&1" > /dev/null 2>&1 &
+                    cmd_continue "$issue_ref" "$message" >> "$log_file" 2>&1 &
                     pid=$!
-                    update_queue_item_state "$queue_id" "notified" "$pm_session" "$pid"
+                    update_queue_item_state "$queue_id" "notified" "" "$pid"
+                    echo "Task $queue_id continued for $issue_ref"
+                else
+                    # Start new session
+                    log_file="$LOGS_DIR/delegate-$(date +%s).log"
+                    cmd_start "$issue_ref" "$message" >> "$log_file" 2>&1 &
+                    pid=$!
+                    update_queue_item_state "$queue_id" "notified" "" "$pid"
+                    echo "Task $queue_id started for $issue_ref"
                 fi
             fi
         done