feat(agent): add Grok Build TUI adapter, runtime dispatch, and skill support

.agents/skills/multi-agent-mux-status/SKILL.md

@@ -8,7 +8,7 @@ platforms: [linux, macos]
 environments: [terminal, herdr]
 metadata:
   hermes:
-    tags: [agent, herdr, claude, antigravity, agy, status, read-only, snapshot]
+    tags: [agent, herdr, claude, antigravity, agy, grok, status, read-only, snapshot]
     related_skills: [multi-agent-mux-create, multi-agent-mux-resume, multi-agent-mux-stop, multi-agent-mux-monitor]
     prereq_skills: [multi-agent-mux-create, multi-agent-mux-monitor]
 ---

.agents/skills/multi-agent-mux-status/scripts/status.sh

@@ -53,12 +53,12 @@ def resume_on_disk(s):
     name = s.get('name', '')
     cwd = (s.get('pane') or {}).get('cwd', '')
     agent = None
-    for a in ('claude', 'agy', 'hermes', 'cline'):
+    for a in ('claude', 'agy', 'hermes', 'cline', 'grok'):
         if any(name.endswith(f'-{r}-{a}') for r in ('creator', 'planner', 'reviewer')) or name.endswith(f'-{a}'):
             agent = a
             break
     if not agent:
-        for a in ('claude', 'agy', 'hermes', 'cline'):
+        for a in ('claude', 'agy', 'hermes', 'cline', 'grok'):
             if f"-{a}" in name or f"_{a}" in name:
                 agent = a
                 break
@@ -95,6 +95,13 @@ def resume_on_disk(s):
         if u:
             return 'yes' if os.path.exists(f"{home}/.cline/data/sessions/{u}/{u}.json") else 'MISSING'
         return 'no'
+    if agent == 'grok':
+        u = s.get('grok_session_id_own')
+        if u:
+            import urllib.parse
+            ws_slug = urllib.parse.quote(cwd, safe='')
+            return 'yes' if os.path.exists(f"{home}/.grok/sessions/{ws_slug}/{u}/chat_history.jsonl") else 'MISSING'
+        return 'no'
     return '?'