fix(kugetsu): source kugetsu in nohup subshell so release_agent_slot is available

Issue #44: release_agent_slot function was not available in sh subshell.
Changed sh to bash and added 'source /home/shoko/.local/bin/kugetsu' before
calling release_agent_slot so the function is properly loaded.

skills/kugetsu/scripts/kugetsu

@@ -58,7 +58,6 @@ run_with_limit() {
     ) &
     disown
 }
->>>>>>> Stashed changes
 
 usage() {
     cat << 'EOF'
@@ -68,7 +67,8 @@ Usage:
     kugetsu init [--force]                            Initialize base + pm-agent sessions (requires TTY)
     kugetsu start <issue-ref> <message> [--debug]    Start task for issue (forks base session)
     kugetsu continue <issue-ref> [message] [--debug] Continue existing task for issue
-    kugetsu delegate <message>                        Send message to PM agent
+    kugetsu delegate <message>                        Send message to PM agent (fire-and-forget)
+    kugetsu logs [n]                                  Show recent delegation logs (default: 10)
     kugetsu status                                    Check kugetsu initialization status
     kugetsu doctor [--fix]                            Diagnose and fix kugetsu issues
     kugetsu notify [list|clear]                        Show or clear notifications
@@ -90,7 +90,10 @@ Commands:
                 Requires pm-agent to be running (created by init).
     continue    Continue work on existing issue session.
     delegate    Send message to PM agent for task coordination.
-                PM context is loaded once at init time.
+                Fire-and-forget: returns immediately, runs in background.
+                Use 'kugetsu logs' to check output.
+    logs        Show recent delegation logs.
+                Default: 10 most recent. Use 'kugetsu logs 20' for more.
     status      Check if kugetsu is initialized and PM agent is active.
     doctor      Diagnose kugetsu issues. Use --fix to attempt repairs.
     notify      Show or clear notifications from PM agent.
@@ -116,6 +119,8 @@ Examples:
     kugetsu init
     kugetsu status
     kugetsu delegate "work on issue #5"
+    kugetsu logs
+    kugetsu logs 20
     kugetsu doctor
     kugetsu doctor --fix
     kugetsu notify list
@@ -128,6 +133,7 @@ EOF
 
 ensure_dirs() {
     mkdir -p "$SESSIONS_DIR"
+    [ -f "$AGENT_COUNT_FILE" ] || echo 0 > "$AGENT_COUNT_FILE"
 }
 
 ensure_worktree_dir() {
@@ -545,7 +551,31 @@ cmd_delegate() {
         exit 1
     fi
     
-    opencode run --continue --session "$pm_session" "$message" 2>&1
+    mkdir -p "$LOGS_DIR"
+    local log_file="$LOGS_DIR/delegate-$(date +%s).log"
+    if ! acquire_agent_slot; then
+        echo "Error: Max concurrent agents ($MAX_CONCURRENT_AGENTS) reached. Try again later." >&2
+        exit 1
+    fi
+    nohup bash -c "source /home/shoko/.local/bin/kugetsu; opencode run --continue --session '$pm_session' '$message' >> '$log_file' 2>&1; release_agent_slot" > /dev/null 2>&1 &
+    disown
+    echo "Delegated to PM agent (logged to $(basename "$log_file"))"
+}
+
+cmd_logs() {
+    local count="${1:-10}"
+    
+    if [ ! -d "$LOGS_DIR" ]; then
+        echo "No logs found."
+        return
+    fi
+    
+    # Log rotation: delete logs older than 7 days
+    find "$LOGS_DIR" -type f -mtime +7 -delete 2>/dev/null
+    
+    ls -lt "$LOGS_DIR" | head -$((count + 1)) | tail -$count | while read line; do
+        echo "$line"
+    done
 }
 
 cmd_doctor() {
@@ -821,11 +851,19 @@ cmd_start() {
     local before_set="${before_sessions//$'\n'/|}"
 
     echo "Forking session for '$issue_ref'..."
+    if ! acquire_agent_slot; then
+        echo "Error: Max concurrent agents ($MAX_CONCURRENT_AGENTS) reached. Try again later." >&2
+        remove_worktree_for_issue "$issue_ref"
+        exit 1
+    fi
+    trap release_agent_slot EXIT
     if [ "$DEBUG_MODE" = true ]; then
         opencode run --fork --session "$base_session_id" "$message" --workdir "$worktree_path" 2>&1 | tee "$SESSIONS_DIR/$session_file.debug.log"
     else
         opencode run --fork --session "$base_session_id" "$message" --workdir "$worktree_path" 2>&1
     fi
+    release_agent_slot
+    trap - EXIT
 
     local after_sessions=$(opencode session list 2>/dev/null | grep -oP '^ses_\w+' | sort)
     local new_session_id=""
@@ -894,6 +932,11 @@ cmd_continue() {
     local worktree_path=$(python3 -c "import json; print(json.load(open('$session_path')).get('worktree_path', ''))" 2>/dev/null || echo "")
 
     echo "Continuing session for '$session_name'..."
+    if ! acquire_agent_slot; then
+        echo "Error: Max concurrent agents ($MAX_CONCURRENT_AGENTS) reached. Try again later." >&2
+        exit 1
+    fi
+    trap release_agent_slot EXIT
     if [ -n "$worktree_path" ] && [ -d "$worktree_path" ]; then
         echo "Using worktree: $worktree_path"
         if [ "$DEBUG_MODE" = true ]; then
@@ -908,6 +951,8 @@ cmd_continue() {
             opencode run --continue --session "$opencode_session_id" "$message"
         fi
     fi
+    release_agent_slot
+    trap - EXIT
 }
 
 cmd_list() {
@@ -1144,6 +1189,10 @@ main() {
         delegate)
             cmd_delegate "$@"
             ;;
+        logs)
+            shift
+            cmd_logs "$@"
+            ;;
         status)
             cmd_status
             ;;