Align conftest mock herdr and unit test assertions with Claude's simplified session-based isolation and native herdr command updates

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

@@ -81,7 +81,7 @@ export HERDR_SERVER_NAME="$(resolve_herdr_server "$SESSION_NAME")"
 # 2. If herdr is alive, attach. Done.
 if herdr has-session -t "$SESSION_NAME" 2>/dev/null; then
   echo "herdr '$SESSION_NAME' already running. Attaching..."
-  exec herdr attach -t "$SESSION_NAME"
+  exec herdr agent attach "$SESSION_NAME"
 fi
 
 # 3. Resolve isolation settings for this session (T4/T5 re-apply)
@@ -160,8 +160,9 @@ esac
 bash .agents/skills/multi-agent-mux-resume/scripts/update_yaml_resumed.sh \
   --session "$SESSION_NAME" --uuid "$UUID"
 
-# 5. Attach
-herdr attach -t "$SESSION_NAME"
+# 5. Attach (real native command — "attach" isn't in the lib.sh tmux-compat shim,
+#    and real herdr has no `-t` flag here, only a positional target)
+herdr agent attach "$SESSION_NAME"
 ```
 
 ## Pitfalls
@@ -175,8 +176,12 @@ herdr attach -t "$SESSION_NAME"
 ## Verification
 
 ```bash
-# 1. herdr alive with the right cmd
-herdr list-panes -t "$SESSION_NAME" -F 'cmd=#{pane_current_command} cwd=#{pane_current_path}'
+# 1. herdr alive with the right cmd (real native command, no lib.sh needed)
+herdr agent get "$SESSION_NAME" | python3 -c "
+import sys, json
+a = json.load(sys.stdin)['result']['agent']
+print(f\"cmd={a['agent']} cwd={a['cwd']}\")
+"
 
 # 2. agent-sessions.yaml updated
 python3 -c "
@@ -187,14 +192,19 @@ print(f'  status: {s[\"status\"]}')
 print(f'  pane.cmd_full: {s[\"pane\"][\"cmd_full\"]}')
 "
 
-# 3. TUI shows resumed conversation (capture-pane to verify)
+# 3. TUI shows resumed conversation (real native command, no lib.sh needed)
 sleep 5
-herdr capture-pane -t "$SESSION_NAME" -p -S -30
+herdr agent read "$SESSION_NAME" --source visible --lines 30
 # look for the previous message at top of the buffer (claude) or last_visible_status set (agy)
 ```
 
+> `herdr list-panes` / `herdr capture-pane` here are tmux-compat pseudo-commands that only
+> work after `source .agents/skills/lib.sh` (as done in `Workflow` above) — the real `herdr`
+> binary doesn't have those subcommands. This block uses the real `herdr agent get`/`herdr agent read`
+> equivalents instead so it also works standalone.
+
 ## When NOT to use this skill
 
 - **No saved session yet** → `multi-agent-mux-create`
 - **Killing an existing session** → `multi-agent-mux-stop`
-- **Just attaching** → `herdr attach -t <name>` (no skill needed)
+- **Just attaching** → `herdr agent attach <name>` (no skill needed)