fix(agents): harden shell adapter bridge and address double-check review feedback

- create_session.sh: add explicit case fallback for delegate_agent (R1)
- lib_py.agents: add spawn-spec, resume-spec, exit-key argv CLI subcommands (R2)
- resume_session.sh, stop_session.sh: replace python string interpolation with safe argv subcommands (R2)
- stop_session.sh: dynamically iterate adapter.identity_cache_fields (R3)
- verify_session.py, workspace_uuid.py: remove dead imports (R9/N4)
- tests/test_a4_adapter_contract.py: add CLI bridge subcommand, clean-env PYTHONPATH safety, and fallback contract tests (R12/N1)
- SKILL.md, docs, logs: synchronize IMPROVEMENTS.md, LOG.md, and resolve_session_id wording (R8/R10/R11)
- promote verified peer review reports for cline (e7b9812b) and claude (31730364)

.agents/skills/multi-agent-mux-create/scripts/create_session.sh

@@ -159,7 +159,7 @@ fi
 # Retrieve agent facts once
 eval "$("$(_delegate_py_bin)" -m lib_py.agents facts "$AGENT" 2>/dev/null || true)"
 
-CMD_FULL="$("$(_delegate_py_bin)" -c "from lib_py.agents.registry import get_adapter; a = get_adapter('$AGENT'); print(a.spawn_spec('$RESOLVED_BIN', '$SESSION_UUID', False) if a else '')" 2>/dev/null || true)"
+CMD_FULL="$("$(_delegate_py_bin)" -m lib_py.agents spawn-spec "$AGENT" "$RESOLVED_BIN" "$SESSION_UUID" "${USE_WRAPPER:-0}" 2>/dev/null || true)"
 if [ -z "$CMD_FULL" ]; then
   case "$AGENT" in
     claude) CMD_FULL="${RESOLVED_BIN} --dangerously-skip-permissions --session-id ${SESSION_UUID}" ;;
@@ -177,7 +177,7 @@ spawn() {
     claude)
       if { [ -x "$WRAPPER" ] && [ "$(basename "$WRAPPER")" != "claude" ]; } || [ "$USE_WRAPPER" = "1" ]; then
         SESSION_UUID=""
-        CMD_FULL="${RESOLVED_BIN} --dangerously-skip-permissions"
+        CMD_FULL="$("$(_delegate_py_bin)" -m lib_py.agents spawn-spec "$AGENT" "$RESOLVED_BIN" "" "true" 2>/dev/null || echo "${RESOLVED_BIN} --dangerously-skip-permissions")"
         nohup "$WRAPPER" >/dev/null 2>&1 &
         disown
       else
@@ -244,7 +244,16 @@ fi
 # agent-sessions.yaml 에 append
 DELEGATE_JOB_ID=""
 if [ -n "$SUBMIT_JOB_PROMPT" ]; then
-  delegate_agent="${MAM_DELEGATE_AGENT_KEY:-antigravity-cli}"
+  delegate_agent="${MAM_DELEGATE_AGENT_KEY:-}"
+  if [ -z "$delegate_agent" ]; then
+    case "$AGENT" in
+      claude) delegate_agent="claude-code" ;;
+      hermes) delegate_agent="hermes-agent" ;;
+      cline)  delegate_agent="cline-agent" ;;
+      agy)    delegate_agent="antigravity-cli" ;;
+      *) echo "ERROR: cannot resolve delegate agent key for '$AGENT'" >&2; exit 2 ;;
+    esac
+  fi
   agent_session="herdr:$SESSION_NAME"
   DELEGATE_JOB_ID=$(delegate_submit_job "$SUBMIT_JOB_PROMPT" "$delegate_agent" "$agent_session")
   echo "Submitted delegated job: $DELEGATE_JOB_ID"