feat(rules): Stealth + opposed Perception - opt-in hide move action (Stealth d20 + trained class + ACP + size mod vs each enemy Perception with -1/10ft distance; observed creatures cannot be hidden from), per-observer hidden_from state treated as total concealment + unseen-attacker +2/deny-Dex for failed observers, attacking or running/charging breaks stealth, move/5-foot-step/withdraw re-check the opposed roll, observation exposes hidden_from (SRD Stealth/Perception/Skill Checks), 13 tests

tests/test_conformance_action_economy.py

@@ -72,6 +72,7 @@ _ALL_KINDS: tuple[_Kind, ...] = (
     "inspire_courage", "retrieve_weapon", "repair_weapon",
     "activate_power_attack", "delay", "ready", "total_defense",
     "fight_defensively", "stand_up", "drop_prone", "aid_another", "run",
+    "hide",
 )
 
 
@@ -99,7 +100,7 @@ def test_slot_per_kind_matches_pf1e_action_type() -> None:
         "aid_another": "standard",
         # move actions
         "move": "move", "stand_up": "move", "retrieve_weapon": "move",
-        "repair_weapon": "move",
+        "repair_weapon": "move", "hide": "move",
         # run: PF1e full-round action (4x speed); consumes standard + move.
         "run": "full_round",
         # swift actions