diff --git a/CHANGES.rst b/CHANGES.rst
index a17344e..cdbe758 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -5,6 +5,10 @@ Changes
 
 Unreleased
 ==========
+- Removed redundant ``--jobs auto`` definition
+- Turned off treating warnings as errors in authoring mode using the
+  ``-W`` option, only use it in CI workflows. This doesn't invalidate
+  the build cache, so cycles are much faster now. Thanks, @surister.
 
 2.1.6 - 2025/12/23
 ==================
diff --git a/common-build/rules.mk b/common-build/rules.mk
index 8b4ccc9..d39a4ba 100644
--- a/common-build/rules.mk
+++ b/common-build/rules.mk
@@ -50,11 +50,11 @@ PYTHON          = python3
 PIP             = $(PYTHON) -m pip
 SPHINXBUILD     = $(ENV_DIR)/bin/sphinx-build
 SPHINXAUTOBUILD = $(ENV_DIR)/bin/sphinx-autobuild
-AUTOBUILD_OPTS  = --watch $(TOP_DIR) --re-ignore '^(?!.+\.(?:rst|md|mmd|html|css|js|py|conf)$$)' --open-browser --delay 0 --jobs auto
+AUTOBUILD_OPTS  = --watch $(TOP_DIR) --re-ignore '^(?!.+\.(?:rst|md|mmd|html|css|js|py|conf)$$)' --open-browser --delay 0
 BUILD_DIR       = $(LOCAL_DIR)/.build
 SPHINX_ARGS     = . $(BUILD_DIR)
-SPHINX_OPTS     = -W -n --jobs auto
-SPHINX_OPTS_CI  = --keep-going
+SPHINX_OPTS     = -n --jobs auto
+SPHINX_OPTS_CI  = -W --keep-going
 RST2HTML        = $(ENV_DIR)/bin/rst2html.py
 TELEMETRY_DIR   = $(LOCAL_DIR)/telemetry
 VALE_VERSION    = 2.6.7