From ebb9db0005f8fc7d21f684c7ca4026bdcf103c97 Mon Sep 17 00:00:00 2001
From: Ale Mercado <maria.mercado@slack-corp.com>
Date: Wed, 29 Jul 2026 12:42:40 -0400
Subject: [PATCH 1/2] feat(blocks): add min_lines and max_lines to
 RichTextInputElement

---
 slack_sdk/models/blocks/block_elements.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/slack_sdk/models/blocks/block_elements.py b/slack_sdk/models/blocks/block_elements.py
index a238a865a..7b52b0f95 100644
--- a/slack_sdk/models/blocks/block_elements.py
+++ b/slack_sdk/models/blocks/block_elements.py
@@ -1442,6 +1442,8 @@ def attributes(self) -> Set[str]:  # type: ignore[override]
             {
                 "initial_value",
                 "dispatch_action_config",
+                "min_lines",
+                "max_lines",
             }
         )
 
@@ -1454,6 +1456,8 @@ def __init__(
         initial_value: Optional[Union[Dict[str, Any], "RichTextBlock"]] = None,  # type: ignore[name-defined] # noqa: F821
         dispatch_action_config: Optional[Union[dict, DispatchActionConfig]] = None,
         focus_on_load: Optional[bool] = None,
+        min_lines: Optional[int] = None,
+        max_lines: Optional[int] = None,
         **others: dict,
     ):
         super().__init__(
@@ -1466,6 +1470,8 @@ def __init__(
 
         self.initial_value = initial_value
         self.dispatch_action_config = dispatch_action_config
+        self.min_lines = min_lines
+        self.max_lines = max_lines
 
 
 # -------------------------------------------------

From 994f30b8e1e4d7eec1457cedf1519f28f0fd8709 Mon Sep 17 00:00:00 2001
From: Ale Mercado <maria.mercado@slack-corp.com>
Date: Wed, 29 Jul 2026 12:43:32 -0400
Subject: [PATCH 2/2] test(blocks): add tests for RichTextInputElement
 min_lines/max_lines

---
 tests/slack_sdk/models/test_elements.py | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/tests/slack_sdk/models/test_elements.py b/tests/slack_sdk/models/test_elements.py
index 2985228a2..4a5a062d3 100644
--- a/tests/slack_sdk/models/test_elements.py
+++ b/tests/slack_sdk/models/test_elements.py
@@ -1173,6 +1173,31 @@ def test_issue_1571(self):
             },
         )
 
+    def test_min_lines(self):
+        input = {
+            "type": "rich_text_input",
+            "action_id": "rich_input",
+            "min_lines": 5,
+        }
+        self.assertDictEqual(input, RichTextInputElement(**input).to_dict())
+
+    def test_max_lines(self):
+        input = {
+            "type": "rich_text_input",
+            "action_id": "rich_input",
+            "max_lines": 16,
+        }
+        self.assertDictEqual(input, RichTextInputElement(**input).to_dict())
+
+    def test_min_and_max_lines(self):
+        input = {
+            "type": "rich_text_input",
+            "action_id": "rich_input",
+            "min_lines": 3,
+            "max_lines": 20,
+        }
+        self.assertDictEqual(input, RichTextInputElement(**input).to_dict())
+
 
 class PlainTextInputElementTests(unittest.TestCase):
     def test_document_1(self):