diff --git a/.github/workflows/style.yml b/.github/workflows/style.yml
index aaabec0cb..73383ced1 100644
--- a/.github/workflows/style.yml
+++ b/.github/workflows/style.yml
@@ -48,6 +48,10 @@ jobs:
         if: steps.changed-files.outputs.any_changed == 'true'
         run: dev/basedpyright-check
 
+      - name: Run Mypy Type Checks
+        if: steps.changed-files.outputs.any_changed == 'true'
+        run: uv --directory api run mypy --exclude-gitignore --exclude 'tests/' --exclude 'migrations/' --check-untyped-defs --disable-error-code=import-untyped .
+
       - name: Dotenv check
         if: steps.changed-files.outputs.any_changed == 'true'
         run: uv run --project api dotenv-linter ./api/.env.example ./web/.env.example
diff --git a/api/app_factory.py b/api/app_factory.py
index 8a0417dd7..17c376de7 100644
--- a/api/app_factory.py
+++ b/api/app_factory.py
@@ -25,6 +25,9 @@ def create_flask_app_with_configs() -> DifyApp:
         # add an unique identifier to each request
         RecyclableContextVar.increment_thread_recycles()
 
+    # Capture the decorator's return value to avoid pyright reportUnusedFunction
+    _ = before_request
+
     return dify_app
 
 
diff --git a/api/core/plugin/utils/chunk_merger.py b/api/core/plugin/utils/chunk_merger.py
index 3fb4d5d9e..21ca2d8d3 100644
--- a/api/core/plugin/utils/chunk_merger.py
+++ b/api/core/plugin/utils/chunk_merger.py
@@ -1,6 +1,6 @@
 from collections.abc import Generator
 from dataclasses import dataclass, field
-from typing import TypeVar, Union
+from typing import TypeVar, Union, cast
 
 from core.agent.entities import AgentInvokeMessage
 from core.tools.entities.tool_entities import ToolInvokeMessage
@@ -85,7 +85,7 @@ def merge_blob_chunks(
                     message=ToolInvokeMessage.BlobMessage(blob=files[chunk_id].data[: files[chunk_id].bytes_written]),
                     meta=resp.meta,
                 )
-                yield merged_message
+                yield cast(MessageType, merged_message)
                 # Clean up the buffer
                 del files[chunk_id]
         else:
diff --git a/api/core/tools/tool_manager.py b/api/core/tools/tool_manager.py
index 6dacaa050..9897045d9 100644
--- a/api/core/tools/tool_manager.py
+++ b/api/core/tools/tool_manager.py
@@ -642,7 +642,7 @@ class ToolManager:
                         include_set=dify_config.POSITION_TOOL_INCLUDES_SET,
                         exclude_set=dify_config.POSITION_TOOL_EXCLUDES_SET,
                         data=provider,
-                        name_func=lambda x: x.identity.name,
+                        name_func=lambda x: x.entity.identity.name,
                     ):
                         continue
                     user_provider = ToolTransformService.builtin_provider_to_user_provider(
diff --git a/api/pyproject.toml b/api/pyproject.toml
index 7416380fd..8f5a6a44a 100644
--- a/api/pyproject.toml
+++ b/api/pyproject.toml
@@ -166,6 +166,7 @@ dev = [
     "types-python-http-client>=3.3.7.20240910",
     "types-redis>=4.6.0.20241004",
     "celery-types>=0.23.0",
+    "mypy~=1.17.1",
 ]
 
 ############################################################
diff --git a/api/pyrightconfig.json b/api/pyrightconfig.json
index 80fd10558..dfffdb8cf 100644
--- a/api/pyrightconfig.json
+++ b/api/pyrightconfig.json
@@ -1,47 +1,28 @@
 {
   "include": ["."],
-  "exclude": ["tests/", "migrations/", ".venv/"],
+  "exclude": [
+    "tests/",
+    "migrations/",
+    ".venv/",
+    "models/",
+    "core/",
+    "controllers/",
+    "tasks/",
+    "services/",
+    "schedule/",
+    "extensions/",
+    "utils/",
+    "repositories/",
+    "libs/",
+    "fields/",
+    "factories/",
+    "events/",
+    "contexts/",
+    "constants/",
+    "configs/",
+    "commands.py"
+  ],
   "typeCheckingMode": "strict",
   "pythonVersion": "3.11",
-  "pythonPlatform": "All",
-  "reportMissingTypeStubs": false,
-  "reportOptionalMemberAccess": "none",
-  "reportOptionalIterable": "none",
-  "reportOptionalOperand": "none",
-  "reportOptionalSubscript": "none",
-  "reportTypedDictNotRequiredAccess": "none",
-  "reportPrivateImportUsage": "none",
-  "reportUnsupportedDunderAll": "none",
-  "reportUnnecessaryTypeIgnoreComment": "none",
-  "reportMatchNotExhaustive": "none",
-  "reportImplicitOverride": "none",
-  "reportCallInDefaultInitializer": "none",
-  "reportUnnecessaryIsInstance": "none",
-  "reportUnnecessaryComparison": "none",
-  "reportUnknownParameterType": "none",
-  "reportMissingParameterType": "none",
-  "reportUnknownArgumentType": "none",
-  "reportUnknownVariableType": "none",
-  "reportUnknownMemberType": "none",
-  "reportMissingTypeArgument": "none",
-  "reportUntypedFunctionDecorator": "none",
-  "reportUnknownLambdaType": "none",
-  "reportPrivateUsage": "none",
-  "reportConstantRedefinition": "none",
-  "reportIncompatibleMethodOverride": "none",
-  "reportIncompatibleVariableOverride": "none",
-  "reportOverlappingOverload": "none",
-  "reportPossiblyUnboundVariable": "none",
-  "reportUnusedImport": "none",
-  "reportUnusedFunction": "none",
-  "reportArgumentType": "none",
-  "reportAssignmentType": "none",
-  "reportAttributeAccessIssue": "none",
-  "reportCallIssue": "none",
-  "reportIndexIssue": "none",
-  "reportRedeclaration": "none",
-  "reportReturnType": "none",
-  "reportOperatorIssue": "none",
-  "reportTypeCommentUsage": "none",
-  "reportDeprecated": "none"
+  "pythonPlatform": "All"
 }
diff --git a/api/services/dataset_service.py b/api/services/dataset_service.py
index a5550c701..4b202001d 100644
--- a/api/services/dataset_service.py
+++ b/api/services/dataset_service.py
@@ -1198,7 +1198,7 @@ class DocumentService:
                             "Invalid process rule mode: %s, can not find dataset process rule",
                             process_rule.mode,
                         )
-                        return
+                        return [], ""
                     db.session.add(dataset_process_rule)
                     db.session.commit()
             lock_name = f"add_document_lock_dataset_id_{dataset.id}"
diff --git a/api/services/tools/builtin_tools_manage_service.py b/api/services/tools/builtin_tools_manage_service.py
index 71bc50017..bce389b94 100644
--- a/api/services/tools/builtin_tools_manage_service.py
+++ b/api/services/tools/builtin_tools_manage_service.py
@@ -573,7 +573,7 @@ class BuiltinToolManageService:
                     include_set=dify_config.POSITION_TOOL_INCLUDES_SET,  # type: ignore
                     exclude_set=dify_config.POSITION_TOOL_EXCLUDES_SET,  # type: ignore
                     data=provider_controller,
-                    name_func=lambda x: x.identity.name,
+                    name_func=lambda x: x.entity.identity.name,
                 ):
                     continue
 
diff --git a/api/uv.lock b/api/uv.lock
index 987dc7243..1d872087c 100644
--- a/api/uv.lock
+++ b/api/uv.lock
@@ -1357,6 +1357,7 @@ dev = [
     { name = "faker" },
     { name = "hypothesis" },
     { name = "lxml-stubs" },
+    { name = "mypy" },
     { name = "pandas-stubs" },
     { name = "pytest" },
     { name = "pytest-benchmark" },
@@ -1547,6 +1548,7 @@ dev = [
     { name = "faker", specifier = "~=32.1.0" },
     { name = "hypothesis", specifier = ">=6.131.15" },
     { name = "lxml-stubs", specifier = "~=0.5.1" },
+    { name = "mypy", specifier = "~=1.17.1" },
     { name = "pandas-stubs", specifier = "~=2.2.3" },
     { name = "pytest", specifier = "~=8.3.2" },
     { name = "pytest-benchmark", specifier = "~=4.0.0" },
@@ -3287,6 +3289,32 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/d8/30/9aec301e9772b098c1f5c0ca0279237c9766d94b97802e9888010c64b0ed/multidict-6.6.3-py3-none-any.whl", hash = "sha256:8db10f29c7541fc5da4defd8cd697e1ca429db743fa716325f236079b96f775a", size = 12313, upload-time = "2025-06-30T15:53:45.437Z" },
 ]
 
+[[package]]
+name = "mypy"
+version = "1.17.1"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "mypy-extensions" },
+    { name = "pathspec" },
+    { name = "typing-extensions" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/8e/22/ea637422dedf0bf36f3ef238eab4e455e2a0dcc3082b5cc067615347ab8e/mypy-1.17.1.tar.gz", hash = "sha256:25e01ec741ab5bb3eec8ba9cdb0f769230368a22c959c4937360efb89b7e9f01", size = 3352570, upload-time = "2025-07-31T07:54:19.204Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/46/cf/eadc80c4e0a70db1c08921dcc220357ba8ab2faecb4392e3cebeb10edbfa/mypy-1.17.1-cp311-cp311-macosx_10_9_x86_64.whl", hash = "sha256:ad37544be07c5d7fba814eb370e006df58fed8ad1ef33ed1649cb1889ba6ff58", size = 10921009, upload-time = "2025-07-31T07:53:23.037Z" },
+    { url = "https://files.pythonhosted.org/packages/5d/c1/c869d8c067829ad30d9bdae051046561552516cfb3a14f7f0347b7d973ee/mypy-1.17.1-cp311-cp311-macosx_11_0_arm64.whl", hash = "sha256:064e2ff508e5464b4bd807a7c1625bc5047c5022b85c70f030680e18f37273a5", size = 10047482, upload-time = "2025-07-31T07:53:26.151Z" },
+    { url = "https://files.pythonhosted.org/packages/98/b9/803672bab3fe03cee2e14786ca056efda4bb511ea02dadcedde6176d06d0/mypy-1.17.1-cp311-cp311-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl", hash = "sha256:70401bbabd2fa1aa7c43bb358f54037baf0586f41e83b0ae67dd0534fc64edfd", size = 11832883, upload-time = "2025-07-31T07:53:47.948Z" },
+    { url = "https://files.pythonhosted.org/packages/88/fb/fcdac695beca66800918c18697b48833a9a6701de288452b6715a98cfee1/mypy-1.17.1-cp311-cp311-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl", hash = "sha256:e92bdc656b7757c438660f775f872a669b8ff374edc4d18277d86b63edba6b8b", size = 12566215, upload-time = "2025-07-31T07:54:04.031Z" },
+    { url = "https://files.pythonhosted.org/packages/7f/37/a932da3d3dace99ee8eb2043b6ab03b6768c36eb29a02f98f46c18c0da0e/mypy-1.17.1-cp311-cp311-musllinux_1_2_x86_64.whl", hash = "sha256:c1fdf4abb29ed1cb091cf432979e162c208a5ac676ce35010373ff29247bcad5", size = 12751956, upload-time = "2025-07-31T07:53:36.263Z" },
+    { url = "https://files.pythonhosted.org/packages/8c/cf/6438a429e0f2f5cab8bc83e53dbebfa666476f40ee322e13cac5e64b79e7/mypy-1.17.1-cp311-cp311-win_amd64.whl", hash = "sha256:ff2933428516ab63f961644bc49bc4cbe42bbffb2cd3b71cc7277c07d16b1a8b", size = 9507307, upload-time = "2025-07-31T07:53:59.734Z" },
+    { url = "https://files.pythonhosted.org/packages/17/a2/7034d0d61af8098ec47902108553122baa0f438df8a713be860f7407c9e6/mypy-1.17.1-cp312-cp312-macosx_10_13_x86_64.whl", hash = "sha256:69e83ea6553a3ba79c08c6e15dbd9bfa912ec1e493bf75489ef93beb65209aeb", size = 11086295, upload-time = "2025-07-31T07:53:28.124Z" },
+    { url = "https://files.pythonhosted.org/packages/14/1f/19e7e44b594d4b12f6ba8064dbe136505cec813549ca3e5191e40b1d3cc2/mypy-1.17.1-cp312-cp312-macosx_11_0_arm64.whl", hash = "sha256:1b16708a66d38abb1e6b5702f5c2c87e133289da36f6a1d15f6a5221085c6403", size = 10112355, upload-time = "2025-07-31T07:53:21.121Z" },
+    { url = "https://files.pythonhosted.org/packages/5b/69/baa33927e29e6b4c55d798a9d44db5d394072eef2bdc18c3e2048c9ed1e9/mypy-1.17.1-cp312-cp312-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl", hash = "sha256:89e972c0035e9e05823907ad5398c5a73b9f47a002b22359b177d40bdaee7056", size = 11875285, upload-time = "2025-07-31T07:53:55.293Z" },
+    { url = "https://files.pythonhosted.org/packages/90/13/f3a89c76b0a41e19490b01e7069713a30949d9a6c147289ee1521bcea245/mypy-1.17.1-cp312-cp312-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl", hash = "sha256:03b6d0ed2b188e35ee6d5c36b5580cffd6da23319991c49ab5556c023ccf1341", size = 12737895, upload-time = "2025-07-31T07:53:43.623Z" },
+    { url = "https://files.pythonhosted.org/packages/23/a1/c4ee79ac484241301564072e6476c5a5be2590bc2e7bfd28220033d2ef8f/mypy-1.17.1-cp312-cp312-musllinux_1_2_x86_64.whl", hash = "sha256:c837b896b37cd103570d776bda106eabb8737aa6dd4f248451aecf53030cdbeb", size = 12931025, upload-time = "2025-07-31T07:54:17.125Z" },
+    { url = "https://files.pythonhosted.org/packages/89/b8/7409477be7919a0608900e6320b155c72caab4fef46427c5cc75f85edadd/mypy-1.17.1-cp312-cp312-win_amd64.whl", hash = "sha256:665afab0963a4b39dff7c1fa563cc8b11ecff7910206db4b2e64dd1ba25aed19", size = 9584664, upload-time = "2025-07-31T07:54:12.842Z" },
+    { url = "https://files.pythonhosted.org/packages/1d/f3/8fcd2af0f5b806f6cf463efaffd3c9548a28f84220493ecd38d127b6b66d/mypy-1.17.1-py3-none-any.whl", hash = "sha256:a9f52c0351c21fe24c21d8c0eb1f62967b262d6729393397b6f443c3b773c3b9", size = 2283411, upload-time = "2025-07-31T07:53:24.664Z" },
+]
+
 [[package]]
 name = "mypy-boto3-bedrock-runtime"
 version = "1.39.0"
@@ -4038,6 +4066,15 @@ dependencies = [
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/10/9a/e3186e760c57ee5f1c27ea5cea577a0ff9abfca51eefcb4d9a4cd39aff2e/pandoc-2.4.tar.gz", hash = "sha256:ecd1f8cbb7f4180c6b5db4a17a7c1a74df519995f5f186ef81ce72a9cbd0dd9a", size = 34635, upload-time = "2024-08-07T14:33:58.016Z" }
 
+[[package]]
+name = "pathspec"
+version = "0.12.1"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/ca/bc/f35b8446f4531a7cb215605d100cd88b7ac6f44ab3fc94870c120ab3adbf/pathspec-0.12.1.tar.gz", hash = "sha256:a482d51503a1ab33b1c67a6c3813a26953dbdc71c31dacaef9a838c4e29f5712", size = 51043, upload-time = "2023-12-10T22:30:45Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/cc/20/ff623b09d963f88bfde16306a54e12ee5ea43e9b597108672ff3a408aad6/pathspec-0.12.1-py3-none-any.whl", hash = "sha256:a0d503e138a4c123b27490a4f7beda6a01c6f288df0e4a8b79c7eb0dc7b4cc08", size = 31191, upload-time = "2023-12-10T22:30:43.14Z" },
+]
+
 [[package]]
 name = "pgvecto-rs"
 version = "0.2.2"