feat(ui-tui): slash command history/display, CoT fade, live skin switch, fix double reasoning

hermes_cli/commands.py

@@ -104,7 +104,7 @@ COMMAND_REGISTRY: list[CommandDef] = [
                args_hint="[level|show|hide]",
                subcommands=("none", "low", "minimal", "medium", "high", "xhigh", "show", "hide", "on", "off")),
     CommandDef("skin", "Show or change the display skin/theme", "Configuration",
-               cli_only=True, args_hint="[name]"),
+               args_hint="[name]"),
     CommandDef("voice", "Toggle voice mode", "Configuration",
                args_hint="[on|off|tts|status]", subcommands=("on", "off", "tts", "status")),
 
@@ -861,6 +861,23 @@ class SlashCommandCompleter(Completer):
             )
             count += 1
 
+    @staticmethod
+    def _skin_completions(sub_text: str, sub_lower: str):
+        """Yield completions for /skin from available skins."""
+        try:
+            from hermes_cli.skin_engine import list_skins
+            for s in list_skins():
+                name = s["name"]
+                if name.startswith(sub_lower) and name != sub_lower:
+                    yield Completion(
+                        name,
+                        start_position=-len(sub_text),
+                        display=name,
+                        display_meta=s.get("description", "") or s.get("source", ""),
+                    )
+        except Exception:
+            pass
+
     def _model_completions(self, sub_text: str, sub_lower: str):
         """Yield completions for /model from config aliases + built-in aliases."""
         seen = set()
@@ -915,10 +932,14 @@ class SlashCommandCompleter(Completer):
             sub_text = parts[1] if len(parts) > 1 else ""
             sub_lower = sub_text.lower()
 
-            # Dynamic model alias completions for /model
+            # Dynamic completions for commands with runtime lists
-            if " " not in sub_text and base_cmd == "/model":
+            if " " not in sub_text:
-                yield from self._model_completions(sub_text, sub_lower)
+                if base_cmd == "/model":
-                return
+                    yield from self._model_completions(sub_text, sub_lower)
+                    return
+                if base_cmd == "/skin":
+                    yield from self._skin_completions(sub_text, sub_lower)
+                    return
 
             # Static subcommand completions
             if " " not in sub_text and base_cmd in SUBCOMMANDS:

run_agent.py

@@ -5722,7 +5722,7 @@ class AIAgent:
             # (gateway, batch, quiet) still get reasoning.
             # Any reasoning that wasn't shown during streaming is caught by the
             # CLI post-response display fallback (cli.py _reasoning_shown_this_turn).
-            if not self.stream_delta_callback:
+            if not self.stream_delta_callback and not self._stream_callback:
                 try:
                     self.reasoning_callback(reasoning_text)
                 except Exception:

tui_gateway/server.py

@@ -121,7 +121,7 @@ def write_json(obj: dict) -> bool:
 
 def _emit(event: str, sid: str, payload: dict | None = None):
     params = {"type": event, "session_id": sid}
-    if payload:
+    if payload is not None:
         params["payload"] = payload
     write_json({"jsonrpc": "2.0", "method": "event", "params": params})
 
@@ -842,6 +842,8 @@ def _(rid, params: dict) -> dict:
                 cfg.setdefault("display", {})[key] = value
                 nv = value
             _save_cfg(cfg)
+            if key == "skin":
+                _emit("skin.changed", "", resolve_skin())
             return _ok(rid, {"key": key, "value": nv})
         except Exception as e:
             return _err(rid, 5001, str(e))
@@ -868,6 +870,8 @@ def _(rid, params: dict) -> dict:
         return _ok(rid, {"config": _load_cfg()})
     if key == "prompt":
         return _ok(rid, {"prompt": _load_cfg().get("custom_prompt", "")})
+    if key == "skin":
+        return _ok(rid, {"value": _load_cfg().get("display", {}).get("skin", "default")})
     return _err(rid, 4002, f"unknown config key: {key}")
 
 

ui-tui/src/app.tsx

@@ -840,7 +840,7 @@ export function App({ gw }: { gw: GatewayClient }) {
       return
     }
 
-    if (completions.length && input && (key.upArrow || key.downArrow)) {
+    if (completions.length && input && historyIdx === null && (key.upArrow || key.downArrow)) {
       setCompIdx(i => (key.upArrow ? (i - 1 + completions.length) % completions.length : (i + 1) % completions.length))
 
       return
@@ -1004,6 +1004,13 @@ export function App({ gw }: { gw: GatewayClient }) {
 
           break
 
+        case 'skin.changed':
+          if (p) {
+            setTheme(fromSkin(p.colors ?? {}, p.branding ?? {}, p.banner_logo ?? '', p.banner_hero ?? ''))
+          }
+
+          break
+
         case 'session.info':
           setInfo(p as SessionInfo)
 
@@ -1520,6 +1527,15 @@ export function App({ gw }: { gw: GatewayClient }) {
 
           return true
 
+        case 'skin':
+          if (arg) {
+            rpc('config.set', { key: 'skin', value: arg }).then((r: any) => sys(`skin → ${r.value}`))
+          } else {
+            rpc('config.get', { key: 'skin' }).then((r: any) => sys(`skin: ${r.value || 'default'}`))
+          }
+
+          return true
+
         case 'yolo':
           rpc('config.set', { key: 'yolo' }).then((r: any) => sys(`yolo ${r.value === '1' ? 'on' : 'off'}`))