From c3806faf307e2411fe27911a918ad0a39f1f837d Mon Sep 17 00:00:00 2001
From: RexeneLee <muhammedt357@gmail.com>
Date: Mon, 5 Jan 2026 23:27:48 +0300
Subject: [PATCH 1/7] Create RFO.py

Add Red Fox Optimization (RFO) algorithm
---
 mealpy/swarm_based/RFO.py | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 mealpy/swarm_based/RFO.py

diff --git a/mealpy/swarm_based/RFO.py b/mealpy/swarm_based/RFO.py
new file mode 100644
index 00000000..7e5f9b55
--- /dev/null
+++ b/mealpy/swarm_based/RFO.py
@@ -0,0 +1 @@
+Add Red Fox Optimization (RFO) algorithm

From a6915edd0af5baa6293607975eac12c98457d7f1 Mon Sep 17 00:00:00 2001
From: RexeneLee <muhammedt357@gmail.com>
Date: Mon, 5 Jan 2026 23:29:34 +0300
Subject: [PATCH 2/7] Update __init__.py

Export OriginalRFO optimizer
---
 mealpy/__init__.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mealpy/__init__.py b/mealpy/__init__.py
index b5ba005f..941f7669 100644
--- a/mealpy/__init__.py
+++ b/mealpy/__init__.py
@@ -128,3 +128,4 @@ def get_optimizer_by_name(name, verbose=False):
         for name, optimizer in cls.items():
             print(f"Optimizer: {name} - {optimizer} - {optimizer()}")
     return cls
+from .RFO import OriginalRFO

From 7e520c7146458dd924b499c0c2f7b3399cf1fc87 Mon Sep 17 00:00:00 2001
From: RexeneLee <muhammedt357@gmail.com>
Date: Mon, 5 Jan 2026 23:31:56 +0300
Subject: [PATCH 3/7] Create test_RFO.py

Add tests for OriginalRFO
---
 mealpy/test_RFO.py | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 mealpy/test_RFO.py

diff --git a/mealpy/test_RFO.py b/mealpy/test_RFO.py
new file mode 100644
index 00000000..8b137891
--- /dev/null
+++ b/mealpy/test_RFO.py
@@ -0,0 +1 @@
+

From d26d7d376843b42c49f0738822a735b5d816b7c1 Mon Sep 17 00:00:00 2001
From: RexeneLee <muhammedt357@gmail.com>
Date: Mon, 5 Jan 2026 23:46:23 +0300
Subject: [PATCH 4/7] Add Red Fox Optimization (RFO) algorithm


From 46f8ca404517aca59ee71a2921fb279636fc26d7 Mon Sep 17 00:00:00 2001
From: RexeneLee <muhammedt357@gmail.com>
Date: Mon, 5 Jan 2026 23:54:31 +0300
Subject: [PATCH 5/7] Add tests for OriginalRFO

---
 tests/swarm_based/test_RFO.py | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 tests/swarm_based/test_RFO.py

diff --git a/tests/swarm_based/test_RFO.py b/tests/swarm_based/test_RFO.py
new file mode 100644
index 00000000..73e2184c
--- /dev/null
+++ b/tests/swarm_based/test_RFO.py
@@ -0,0 +1,21 @@
+import numpy as np
+from mealpy import FloatVar
+from mealpy.swarm_based import OriginalRFO
+
+
+def objective_function(solution):
+    return np.sum(solution ** 2)
+
+
+def test_OriginalRFO():
+    problem = {
+        "obj_func": objective_function,
+        "bounds": FloatVar(lb=(-10.,) * 5, ub=(10.,) * 5),
+        "minmax": "min",
+    }
+
+    model = OriginalRFO(epoch=50, pop_size=20)
+    result = model.solve(problem)
+
+    assert result.solution is not None
+    assert result.target.fitness is not None

From f32bc3e0359e140e9fea5b7358ac6cf9ba440595 Mon Sep 17 00:00:00 2001
From: RexeneLee <muhammedt357@gmail.com>
Date: Tue, 6 Jan 2026 00:32:05 +0300
Subject: [PATCH 6/7] Add Red Fox Optimization (RFO) implementation

---
 mealpy/swarm_based/RFO.py | 34 +++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/mealpy/swarm_based/RFO.py b/mealpy/swarm_based/RFO.py
index 7e5f9b55..81481deb 100644
--- a/mealpy/swarm_based/RFO.py
+++ b/mealpy/swarm_based/RFO.py
@@ -1 +1,33 @@
-Add Red Fox Optimization (RFO) algorithm
+import numpy as np
+from mealpy.optimizer import Optimizer
+
+
+class OriginalRFO(Optimizer):
+    """
+    Red Fox Optimization (RFO)
+    Dehghani et al., Artificial Intelligence Review, 2021
+    DOI: 10.1007/s10462-020-09904-6
+    """
+
+    def __init__(self, epoch=1000, pop_size=50, **kwargs):
+        super().__init__(**kwargs)
+        self.epoch = epoch
+        self.pop_size = pop_size
+        self.set_parameters(["epoch", "pop_size"])
+        self.sort_flag = False
+
+    def evolve(self, epoch):
+        a = 2 * (1 - epoch / self.epoch)
+        pop_new = []
+
+        for i in range(self.pop_size):
+            r = np.random.uniform(-1, 1, self.problem.n_dims)
+            dist = np.abs(self.g_best.solution - self.pop[i].solution)
+            pos_new = self.g_best.solution + a * r * dist
+            pos_new = self.amend_solution(pos_new)
+
+            agent = self.generate_empty_agent(pos_new)
+            agent.target = self.get_target(pos_new)
+            pop_new.append(agent)
+
+        self.pop = self.update_target_for_population(pop_new)

From f3fa6fa14e077de8de598969cdb1985009a31ce3 Mon Sep 17 00:00:00 2001
From: RexeneLee <muhammedt357@gmail.com>
Date: Tue, 6 Jan 2026 00:35:03 +0300
Subject: [PATCH 7/7] Add basic test for RFO optimizer

---
 mealpy/test_RFO.py | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/mealpy/test_RFO.py b/mealpy/test_RFO.py
index 8b137891..1ecce8a9 100644
--- a/mealpy/test_RFO.py
+++ b/mealpy/test_RFO.py
@@ -1 +1,21 @@
+import numpy as np
+from mealpy import FloatVar
+from mealpy.swarm_based.RFO import OriginalRFO
+
+
+def sphere(x):
+    return np.sum(x ** 2)
+
+
+def test_rfo_runs():
+    problem = {
+        "obj_func": sphere,
+        "bounds": FloatVar(lb=(-5.,) * 5, ub=(5.,) * 5),
+        "minmax": "min",
+    }
+
+    model = OriginalRFO(epoch=10, pop_size=10)
+    result = model.solve(problem)
+
+    assert result.solution is not None