feat(agent): add full codex agent support (v4.2.0)

- Implement CodexAdapter in lib_py/agents/adapters/codex.py with safe flags and TUI readiness
- Extend create_session, resume_session, stop_session, and reconcile for codex CLI
- Support codex agent delegation and loop integration across all multi-agent skills
- Add unit, component, and contract test suites for codex integration
- Verify all 462 tests passing cleanly

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

@@ -1,14 +1,14 @@
 ---
 name: multi-agent-mux-status
 description: "Read-only instant snapshot of all agent herdr sessions — name, YAML status, herdr alive, pane cmd/cwd, resume UUID on disk, and any drift. No mutation. Reuses reconcile.sh --dry-run for the diff logic. Use when you want to know 'what's running RIGHT NOW' without spinning up the monitor loop."
-version: 4.1.3
+version: 4.2.0
 author: godopu
 license: MIT
 platforms: [linux, macos]
 environments: [terminal, herdr]
 metadata:
   hermes:
-    tags: [agent, herdr, claude, antigravity, agy, grok, status, read-only, snapshot]
+    tags: [agent, herdr, claude, antigravity, agy, grok, opencode, codex, 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', 'grok', 'opencode'):
+    for a in ('claude', 'agy', 'hermes', 'grok', 'opencode', 'codex'):
         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', 'grok', 'opencode'):
+        for a in ('claude', 'agy', 'hermes', 'grok', 'opencode', 'codex'):
             if f"-{a}" in name or f"_{a}" in name:
                 agent = a
                 break
@@ -125,6 +125,29 @@ def resume_on_disk(s):
             except Exception:
                 return 'MISSING'
         return 'no'
+    if agent == 'codex':
+        u = s.get('codex_session_id_own')
+        if u:
+            codex_home = os.environ.get('CODEX_HOME', f"{home}/.codex")
+            db_matches = glob.glob(f"{codex_home}/state_*.sqlite")
+            if db_matches:
+                db = max(db_matches, key=os.path.getmtime)
+                try:
+                    import sqlite3
+                    conn = sqlite3.connect(db)
+                    r = conn.execute("SELECT rollout_path FROM threads WHERE id=?", (u,)).fetchone()
+                    conn.close()
+                    if r and r[0] and os.path.exists(r[0]):
+                        return 'yes'
+                    if r:
+                        return 'yes'
+                except Exception:
+                    pass
+            m = glob.glob(f"{codex_home}/sessions/*/*/*/rollout-*-{u}.jsonl")
+            if m and os.path.exists(m[0]):
+                return 'yes'
+            return 'MISSING'
+        return 'no'
     return '?'
 
 
@@ -231,12 +254,12 @@ def resume_on_disk(s):
     name = s.get('name', '')
     cwd = (s.get('pane') or {}).get('cwd', '')
     agent = None
-    for a in ('claude', 'agy', 'hermes', 'grok', 'opencode'):
+    for a in ('claude', 'agy', 'hermes', 'grok', 'opencode', 'codex'):
         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', 'grok', 'opencode'):
+        for a in ('claude', 'agy', 'hermes', 'grok', 'opencode', 'codex'):
             if f"-{a}" in name or f"_{a}" in name:
                 agent = a
                 break
@@ -303,6 +326,29 @@ def resume_on_disk(s):
             except Exception:
                 return 'MISSING'
         return 'no'
+    if agent == 'codex':
+        u = s.get('codex_session_id_own')
+        if u:
+            codex_home = os.environ.get('CODEX_HOME', f"{home}/.codex")
+            db_matches = glob.glob(f"{codex_home}/state_*.sqlite")
+            if db_matches:
+                db = max(db_matches, key=os.path.getmtime)
+                try:
+                    import sqlite3
+                    conn = sqlite3.connect(db)
+                    r = conn.execute("SELECT rollout_path FROM threads WHERE id=?", (u,)).fetchone()
+                    conn.close()
+                    if r and r[0] and os.path.exists(r[0]):
+                        return 'yes'
+                    if r:
+                        return 'yes'
+                except Exception:
+                    pass
+            m = glob.glob(f"{codex_home}/sessions/*/*/*/rollout-*-{u}.jsonl")
+            if m and os.path.exists(m[0]):
+                return 'yes'
+            return 'MISSING'
+        return 'no'
     return '?'