fix: preserve agent prompt fields in button models

slack_sdk/models/blocks/block_elements.py

@@ -188,10 +188,23 @@ class ButtonElement(InteractiveElement):
     text_max_length = 75
     url_max_length = 3000
     value_max_length = 2000
+    agent_prompt_max_length = 4000
 
     @property
     def attributes(self) -> Set[str]:  # type: ignore[override]
-        return super().attributes.union({"text", "url", "value", "style", "confirm", "accessibility_label"})
+        return super().attributes.union(
+            {
+                "text",
+                "url",
+                "value",
+                "style",
+                "confirm",
+                "accessibility_label",
+                "agent_prompt",
+                "agent_prompt_display",
+                "visible_to_user_ids",
+            }
+        )
 
     def __init__(
         self,
@@ -203,6 +216,9 @@ def __init__(
         style: Optional[str] = None,  # primary, danger
         confirm: Optional[Union[dict, ConfirmObject]] = None,
         accessibility_label: Optional[str] = None,
+        agent_prompt: Optional[str] = None,
+        agent_prompt_display: Optional[str] = None,
+        visible_to_user_ids: Optional[List[str]] = None,
         **others: dict,
     ):
         """An interactive element that inserts a button.
@@ -234,6 +250,12 @@ def __init__(
             accessibility_label: A label for longer descriptive text about a button element.
                 This label will be read out by screen readers instead of the button text object.
                 Maximum length for this field is 75 characters.
+            agent_prompt: A prompt sent to Slackbot when the button is clicked, if Slackbot AI is available to the user.
+                Maximum length for this field is 4000 characters.
+            agent_prompt_display: Short text shown instead of the full agent_prompt in the user's Slackbot message.
+                Only takes effect alongside agent_prompt and defaults to the button's text.
+            visible_to_user_ids: User IDs for which the button appears.
+                If not provided, the button is visible to all users.
         """
         super().__init__(action_id=action_id, type=self.type)
         show_unknown_key_warning(self, others)
@@ -245,6 +267,9 @@ def __init__(
         self.style = style
         self.confirm = ConfirmObject.parse(confirm)  # type: ignore[arg-type]
         self.accessibility_label = accessibility_label
+        self.agent_prompt = agent_prompt
+        self.agent_prompt_display = agent_prompt_display
+        self.visible_to_user_ids = visible_to_user_ids
 
     @JsonValidator(f"text attribute cannot exceed {text_max_length} characters")
     def _validate_text_length(self) -> bool:
@@ -266,6 +291,10 @@ def _validate_style_valid(self):
     def _validate_accessibility_label_length(self) -> bool:
         return self.accessibility_label is None or len(self.accessibility_label) <= self.text_max_length
 
+    @JsonValidator(f"agent_prompt attribute cannot exceed {agent_prompt_max_length} characters")
+    def _validate_agent_prompt_length(self) -> bool:
+        return self.agent_prompt is None or len(self.agent_prompt) <= self.agent_prompt_max_length
+
 
 class LinkButtonElement(ButtonElement):
     def __init__(

tests/slack_sdk/models/test_elements.py

@@ -92,6 +92,42 @@ def test_with_input_interactive_element(self):
 
 
 class ButtonElementTests(unittest.TestCase):
+    def test_agent_prompt_and_visibility_fields(self):
+        fields = {
+            "agent_prompt": "Summarize this incident and suggest next steps.",
+            "agent_prompt_display": "Summarize this incident",
+            "visible_to_user_ids": ["U123456", "U789012"],
+        }
+        for optional_fields in ({}, *({key: value} for key, value in fields.items()), fields):
+            with self.subTest(fields=list(optional_fields)):
+                input = {
+                    "type": "button",
+                    "text": {"type": "plain_text", "text": "Summarize with Slackbot"},
+                    "action_id": "summarize_incident",
+                    **optional_fields,
+                }
+                self.assertDictEqual(input, ButtonElement(**input).to_dict())
+                self.assertDictEqual(input, BlockElement.parse(input).to_dict())
+
+    def test_agent_prompt_and_visibility_fields_none_are_omitted(self):
+        button = ButtonElement(
+            text="Summarize with Slackbot",
+            agent_prompt=None,
+            agent_prompt_display=None,
+            visible_to_user_ids=None,
+        ).to_dict()
+        for field in ("agent_prompt", "agent_prompt_display", "visible_to_user_ids"):
+            self.assertNotIn(field, button)
+
+    def test_agent_prompt_max_length(self):
+        prompt = "a" * 4000
+        button = ButtonElement(text="Summarize with Slackbot", agent_prompt=prompt).to_dict()
+        self.assertEqual(prompt, button["agent_prompt"])
+
+    def test_agent_prompt_too_long(self):
+        with self.assertRaisesRegex(SlackObjectFormationError, "agent_prompt"):
+            ButtonElement(text="Summarize with Slackbot", agent_prompt="a" * 4001).to_dict()
+
     def test_document_1(self):
         input = {
             "type": "button",

tests/slack_sdk/web/test_views_publish_agent_prompt.py

@@ -0,0 +1,51 @@
+from copy import deepcopy
+import unittest
+from unittest.mock import patch
+
+from slack_sdk import WebClient
+from slack_sdk.models.blocks import ActionsBlock, ButtonElement, SectionBlock
+from slack_sdk.models.views import View
+
+
+class TestViewsPublishAgentPrompt(unittest.TestCase):
+    def test_models_send_the_same_button_fields_as_raw_json(self):
+        button = {
+            "type": "button",
+            "text": {"type": "plain_text", "text": "Summarize with Slackbot"},
+            "action_id": "summarize_incident",
+            "style": "primary",
+            "agent_prompt": "Summarize this incident and suggest next steps.",
+            "agent_prompt_display": "Summarize this incident",
+            "visible_to_user_ids": ["U123456"],
+        }
+        blocks = (
+            {"type": "actions", "elements": [button]},
+            {
+                "type": "section",
+                "text": {"type": "mrkdwn", "text": "Incident details"},
+                "accessory": button,
+            },
+        )
+        client = WebClient(token="xoxb-api_test")
+        for block in blocks:
+            block_class = ActionsBlock if block["type"] == "actions" else SectionBlock
+            raw_view = {"type": "home", "blocks": [block]}
+            explicit_button_block = deepcopy(block)
+            if block["type"] == "actions":
+                explicit_button_block["elements"] = [ButtonElement(**deepcopy(button))]
+            else:
+                explicit_button_block["accessory"] = ButtonElement(**deepcopy(button))
+            views = {
+                "raw_json": deepcopy(raw_view),
+                "button_model": View(type="home", blocks=[block_class(**explicit_button_block)]),
+                "raw_button_in_block_model": View(type="home", blocks=[block_class(**deepcopy(block))]),
+                "raw_blocks_in_view_model": View(**deepcopy(raw_view)),
+            }
+            for representation, view in views.items():
+                with self.subTest(placement=block["type"], representation=representation):
+                    # Keep the SDK's serialization intact; intercept only the HTTP transport.
+                    with patch.object(client, "_sync_send", return_value={"ok": True}) as transport:
+                        client.views_publish(user_id="U123456", view=view)
+                    transport.assert_called_once()
+                    request = transport.call_args[1]["req_args"]["json"]
+                    self.assertDictEqual({"user_id": "U123456", "view": raw_view}, request)