feat: add seat-scoped static and dynamic assistant modes

src/cognitive_agent/application/assistant_plan_guard.py

@@ -25,8 +25,6 @@ from collections.abc import Set as AbstractSet
 from dataclasses import dataclass
 from typing import Any
 
-from cognitive_agent.application.semantic_ir import resolve_scene_seat_scopes
-
 MAX_PLAN_BYTES = 24 * 1024
 MAX_PLAN_REQUESTS = 12
 MAX_PLAN_PARAMETERS = 12
@@ -1159,10 +1157,13 @@ def guard_assistant_plan(
             parser_claims.update(_intent_claims(intent))
     local_keys = _resolved_keys(trusted_local or {})
     non_execution = bool(_NON_EXECUTION_PATTERN.search(text))
-    scene_seat_scopes = (
-        resolve_scene_seat_scopes(text if scene_scope_utterance is None else scene_scope_utterance)
-        if allow_scene_composition else None
-    )
+    # An explicit empty internal scope is reserved for already validated saved
+    # schedules/draft revisions. New scenes use passenger when no seat is named.
+    scene_seat_scopes = None
+    if allow_scene_composition and scene_scope_utterance != "":
+        from cognitive_agent.application.mode_creation_seat_policy import creation_seat_scopes
+
+        scene_seat_scopes = creation_seat_scopes(text if scene_scope_utterance is None else scene_scope_utterance)
 
     accepted: list[dict[str, Any]] = []
     rejected: list[dict[str, str]] = []