diff --git a/doc/qtcreatordev/src/external-resources.qdoc b/doc/qtcreatordev/src/external-resources.qdoc
new file mode 100644
index 00000000000..e902d363e88
--- /dev/null
+++ b/doc/qtcreatordev/src/external-resources.qdoc
@@ -0,0 +1,12 @@
+// Copyright (C) 2025 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
+
+
+/*!
+    \externalpage https://doc.qt.io/qtcreator/creator-how-to-add-wizards.html
+    \title Add wizards
+*/
+/*!
+    \externalpage https://doc.qt.io/qtcreator/creator-project-wizards.html
+    \title Custom Wizards
+*/
diff --git a/src/plugins/coreplugin/basefilewizardfactory.cpp b/src/plugins/coreplugin/basefilewizardfactory.cpp
index 9a18a96afd9..56b47b65ede 100644
--- a/src/plugins/coreplugin/basefilewizardfactory.cpp
+++ b/src/plugins/coreplugin/basefilewizardfactory.cpp
@@ -89,8 +89,7 @@ Wizard *BaseFileWizardFactory::runWizardImpl(const FilePath &path, Id platform,
     postGenerateFiles(), which is called after generating the files.
 
     \note Instead of using this class, we recommend that you create JSON-based
-    wizards, as instructed in \l{https://doc.qt.io/qtcreator/creator-project-wizards.html}
-    {Adding New Custom Wizards}.
+    wizards, as instructed in \l{Add wizards} and \l {Custom wizards}.
 
     \sa Core::GeneratedFile, Core::WizardDialogParameters, Core::BaseFileWizard
 */
@@ -117,11 +116,10 @@ Wizard *BaseFileWizardFactory::runWizardImpl(const FilePath &path, Id platform,
 /*!
     Physically writes \a files.
 
-    If the files cannot be written, returns \c false and sets \a errorMessage
-    to the message that is displayed to users.
+    If the files cannot be written, returns \c Utils::ResultError.
 
     Re-implement (calling the base implementation) to create files with
-    GeneratedFile::CustomGeneratorAttribute set.
+    \c GeneratedFile::CustomGeneratorAttribute set.
 */
 
 Result<> BaseFileWizardFactory::writeFiles(const GeneratedFiles &files) const
@@ -141,9 +139,7 @@ Result<> BaseFileWizardFactory::writeFiles(const GeneratedFiles &files) const
     specified by \a l are actually created.
 
     The default implementation opens editors with the newly generated files
-    that have GeneratedFile::OpenEditorAttribute set.
-
-    Returns \a errorMessage if errors occur.
+    that have \c GeneratedFile::OpenEditorAttribute set.
 */
 
 Result<> BaseFileWizardFactory::postGenerateFiles(const QWizard *, const GeneratedFiles &l) const
@@ -153,11 +149,10 @@ Result<> BaseFileWizardFactory::postGenerateFiles(const QWizard *, const Generat
 
 /*!
     Opens the editors for the files \a l if their
-    GeneratedFile::OpenEditorAttribute attribute
+    \c GeneratedFile::OpenEditorAttribute attribute
     is set accordingly.
 
-    If the editorrs cannot be opened, returns \c false and dand sets
-    \a errorMessage to the message that is displayed to users.
+    If the editors cannot be opened, returns \c Utils::ResultError.
 */
 
 Result<> BaseFileWizardFactory::postGenerateOpenEditors(const GeneratedFiles &l)
diff --git a/src/plugins/coreplugin/editormanager/ieditorfactory.cpp b/src/plugins/coreplugin/editormanager/ieditorfactory.cpp
index 5ea3b11e06b..2811ab80002 100644
--- a/src/plugins/coreplugin/editormanager/ieditorfactory.cpp
+++ b/src/plugins/coreplugin/editormanager/ieditorfactory.cpp
@@ -293,10 +293,7 @@ IEditor *IEditorFactory::createEditor() const
 /*!
     Opens the file at \a filePath in an external editor.
 
-    Returns \c true on success or \c false on failure with the error in
-    \a errorMessage.
-
-    \sa setEditorStarter()
+    Returns \c Utils::ResultOk on success or \c Utils::ResultError on failure.
 */
 Result<> IEditorFactory::startEditor(const FilePath &filePath)
 {
@@ -322,6 +319,8 @@ void IEditorFactory::setEditorCreator(const std::function<IEditor *()> &creator)
 }
 
 /*!
+    \fn void Core::IEditorFactory::setEditorStarter(const std::function<Utils::Result<>(const Utils::FilePath &)> &starter)
+
     Sets the function that is used to open a file for a given \c FilePath to
     \a starter.
 
diff --git a/src/plugins/coreplugin/find/basetextfind.cpp b/src/plugins/coreplugin/find/basetextfind.cpp
index 0820d9bbc2d..251db41e983 100644
--- a/src/plugins/coreplugin/find/basetextfind.cpp
+++ b/src/plugins/coreplugin/find/basetextfind.cpp
@@ -54,14 +54,14 @@ BaseTextFindPrivate::BaseTextFindPrivate()
 */
 
 /*!
-    \fn void Core::BaseTextFind::findScopeChanged(const Utils::MultiTextCursor &cursor)
+    \internal
 
     This signal is emitted when the search
     scope changes to \a cursor.
 */
 
 /*!
-    \fn void Core::BaseTextFind::highlightAllRequested(const QString &txt, Utils::FindFlags findFlags)
+    \internal
 
     This signal is emitted when the search results for \a txt using the given
     \a findFlags should be highlighted in the editor widget.
diff --git a/src/plugins/coreplugin/idocument.cpp b/src/plugins/coreplugin/idocument.cpp
index 3d05ab25a7c..6545dcdd590 100644
--- a/src/plugins/coreplugin/idocument.cpp
+++ b/src/plugins/coreplugin/idocument.cpp
@@ -288,13 +288,10 @@ Id IDocument::id() const
     If the editor is opened from a regular file, \a filePath and \a
     filePath are the same.
 
-    Use \a errorString to return an error message if this document cannot
-    handle the file contents.
-
     Returns whether the file was opened and read successfully.
 
     The default implementation does nothing and returns
-    CannotHandle.
+    \c CannotHandle.
 
     \sa EditorManager::openEditor()
     \sa shouldAutoSave()
diff --git a/src/plugins/coreplugin/textdocument.cpp b/src/plugins/coreplugin/textdocument.cpp
index 12a657a92a2..e1ad90b1c58 100644
--- a/src/plugins/coreplugin/textdocument.cpp
+++ b/src/plugins/coreplugin/textdocument.cpp
@@ -67,9 +67,6 @@ QByteArray BaseTextDocument::decodingErrorSample() const
     Writes out the contents (\a data) of the text file \a filePath.
     Uses the format obtained from the last read() of the file.
 
-    If an error occurs while writing the file, \a errorMessage is set to the
-    error details.
-
     Returns whether the operation was successful.
 */
 
@@ -82,9 +79,6 @@ Result<> BaseTextDocument::write(const FilePath &filePath, const QString &data)
     Writes out the contents (\a data) of the text file \a filePath.
     Uses the custom format \a format.
 
-    If an error occurs while writing the file, \a errorMessage is set to the
-    error details.
-
     Returns whether the operation was successful.
 */
 
@@ -123,9 +117,6 @@ bool BaseTextDocument::isUtf8Codec(const QByteArray &name)
     Autodetects file format and reads the text file specified by \a filePath
     into a list of strings specified by \a plainTextList.
 
-    If an error occurs while writing the file, \a errorString is set to the
-    error details.
-
     Returns whether the operation was successful.
 */
 
@@ -144,9 +135,6 @@ BaseTextDocument::ReadResult BaseTextDocument::read(const FilePath &filePath,
     Autodetects file format and reads the text file specified by \a filePath
     into \a plainText.
 
-    If an error occurs while writing the file, \a errorString is set to the
-    error details.
-
     Returns whether the operation was successful.
 */