diff --git a/core/wren-core-py/pyproject.toml b/core/wren-core-py/pyproject.toml
index 83a6ad4e6f..3516771478 100644
--- a/core/wren-core-py/pyproject.toml
+++ b/core/wren-core-py/pyproject.toml
@@ -46,6 +46,8 @@ build-backend = "maturin"
 line-length = 88
 target-version = "py311"
 exclude = ["tools/"]
+# ruff 0.16+ formats Markdown code blocks by default; docs are hand-formatted.
+extend-exclude = ["*.md"]
 
 [tool.ruff.lint]
 select = [
diff --git a/core/wren/pyproject.toml b/core/wren/pyproject.toml
index d1ed4382e3..03e03b25e9 100644
--- a/core/wren/pyproject.toml
+++ b/core/wren/pyproject.toml
@@ -89,6 +89,8 @@ artifacts = [
 [tool.ruff]
 line-length = 88
 target-version = "py311"
+# ruff 0.16+ formats Markdown code blocks by default; docs are hand-formatted.
+extend-exclude = ["*.md"]
 
 [tool.ruff.lint]
 select = ["E", "F", "I", "PLC"]
diff --git a/sdk/wren-langchain/pyproject.toml b/sdk/wren-langchain/pyproject.toml
index cae1642795..3b101b3c73 100644
--- a/sdk/wren-langchain/pyproject.toml
+++ b/sdk/wren-langchain/pyproject.toml
@@ -99,6 +99,8 @@ packages = ["src/wren_langchain"]
 [tool.ruff]
 line-length = 88
 target-version = "py311"
+# ruff 0.16+ formats Markdown code blocks by default; docs are hand-formatted.
+extend-exclude = ["*.md"]
 
 [tool.ruff.lint]
 select = ["E", "F", "I", "PLC"]
diff --git a/sdk/wren-pydantic/pyproject.toml b/sdk/wren-pydantic/pyproject.toml
index 2f0c704f35..6bfb2d27ed 100644
--- a/sdk/wren-pydantic/pyproject.toml
+++ b/sdk/wren-pydantic/pyproject.toml
@@ -95,6 +95,8 @@ packages = ["src/wren_pydantic"]
 [tool.ruff]
 line-length = 88
 target-version = "py311"
+# ruff 0.16+ formats Markdown code blocks by default; docs are hand-formatted.
+extend-exclude = ["*.md"]
 
 [tool.ruff.lint]
 select = ["E", "F", "I", "PLC"]