--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/help/extensions.txt	Sun Oct 04 09:59:13 2009 +0200
@@ -0,0 +1,33 @@
+    Mercurial has the ability to add new features through the use of
+    extensions. Extensions may add new commands, add options to
+    existing commands, change the default behavior of commands, or
+    implement hooks.
+
+    Extensions are not loaded by default for a variety of reasons:
+    they can increase startup overhead; they may be meant for advanced
+    usage only; they may provide potentially dangerous abilities (such
+    as letting you destroy or modify history); they might not be ready
+    for prime time; or they may alter some usual behaviors of stock
+    Mercurial. It is thus up to the user to activate extensions as
+    needed.
+
+    To enable the "foo" extension, either shipped with Mercurial or in
+    the Python search path, create an entry for it in your hgrc, like
+    this::
+
+      [extensions]
+      foo =
+
+    You may also specify the full path to an extension::
+
+      [extensions]
+      myfeature = ~/.hgext/myfeature.py
+
+    To explicitly disable an extension enabled in an hgrc of broader
+    scope, prepend its path with !::
+
+      [extensions]
+      # disabling extension bar residing in /path/to/extension/bar.py
+      hgext.bar = !/path/to/extension/bar.py
+      # ditto, but no path was supplied for extension baz
+      hgext.baz = !