fix(lib): strip duplicate binary path in final_cmd to fix Go flag parsing and add dual herdr agent start syntax fallback

.agents/skills/lib.sh

@@ -257,13 +257,35 @@ for tok in tokens:
 print('\t'.join(env_flags) + '\n' + ' '.join(binary_tokens))
 " "$run_cmd" 2>/dev/null || echo "")
 
-    env_flags=""
-    final_cmd="$run_cmd"
-    if [ -n "$parsed" ]; then
-      env_flags=$(echo "$parsed" | head -n 1 | tr '\t' ' ')
-      final_cmd=$(echo "$parsed" | tail -n +2)
+    kind="cline"
+    if echo "$name" | grep -qi "agy"; then
+      kind="agy"
+    elif echo "$name" | grep -qi "claude"; then
+      kind="claude"
+    elif echo "$name" | grep -qi "hermes"; then
+      kind="hermes"
+    elif echo "$final_cmd" | grep -qi "agy"; then
+      kind="agy"
+    elif echo "$final_cmd" | grep -qi "claude"; then
+      kind="claude"
+    elif echo "$final_cmd" | grep -qi "hermes"; then
+      kind="hermes"
     fi
 
+    # Strip duplicate agent binary name/path from final_cmd if present, preventing Go flag.Parse() positional argument interruption
+    final_cmd=$(python3 -c "
+import sys, shlex
+cmd = sys.argv[1]
+kind = sys.argv[2]
+try:
+    tokens = shlex.split(cmd)
+    if tokens and (tokens[0] == kind or tokens[0].endswith('/' + kind)):
+        tokens = tokens[1:]
+    print(' '.join(shlex.quote(t) for t in tokens))
+except Exception:
+    print(cmd)
+" "$final_cmd" "$kind" 2>/dev/null || echo "$final_cmd")
+
     # Check if there is an existing workspace inside this session (to reuse and split view)
     existing_ws=$(_real_herdr workspace list 2>/dev/null | TARGET_CWD="${ws:-.}" python3 -c "
 import sys, json, os
@@ -299,7 +321,11 @@ except Exception:
       ws_id="${ws_id:-w1}"
     fi
 
-    eval "_real_herdr agent start \"$name\" --workspace \"$ws_id\" --cwd \"${ws:-.}\" $split_flag $env_flags -- $final_cmd"
+    # Attempt --kind syntax first, fall back to explicit binary name if required by herdr CLI
+    res=$(eval "_real_herdr agent start \"$name\" --kind \"$kind\" --workspace \"$ws_id\" --cwd \"${ws:-.}\" $split_flag $env_flags -- $final_cmd" 2>&1 || true)
+    if ! echo "$res" | grep -q "agent_started"; then
+      res=$(eval "_real_herdr agent start \"$name\" --workspace \"$ws_id\" --cwd \"${ws:-.}\" $split_flag $env_flags -- $kind $final_cmd" 2>&1 || true)
+    fi
     ;;
   kill-session)
     sess=""