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diff --git a/‎runtime/doc/insert.txt
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+17-1Lines changed: 17 additions & 1 deletion b/‎runtime/doc/insert.txt
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diff --git a/‎runtime/doc/options.txt
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+14-4Lines changed: 14 additions & 4 deletions b/‎runtime/doc/options.txt
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+14-4Lines changed: 14 additions & 4 deletions
diff --git a/‎runtime/doc/quickref.txt
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diff --git a/‎runtime/doc/tags
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diff --git a/‎runtime/doc/version9.txt
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diff --git a/‎runtime/optwin.vim
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@@ -1,4 +1,4 @@
-*insert.txt*    For Vim version 9.1.  Last change: 2025 Jul 21
+*insert.txt*    For Vim version 9.1.  Last change: 2025 Jul 25
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -1133,6 +1133,22 @@ Stop completion						*compl-stop*
 CTRL-X CTRL-Z		Stop completion without changing the text.
 
 
+AUTOCOMPLETION						*ins-autocompletion*
+
+Vim can display a completion menu as you type, similar to using |i_CTRL-N|,
+but triggered automatically.  See |'autocomplete'|. The menu items are
+collected from the sources listed in the |'complete'| option.
+
+Unlike manual |i_CTRL-N| completion, this mode uses a decaying timeout to keep
+Vim responsive.  Sources earlier in the |'complete'| list are given more time
+(higher priority), but every source is guaranteed a time slice, however small.
+
+This mode is fully compatible with other completion modes.  You can invoke
+any of them at any time by typing |CTRL-X|, which temporarily suspends
+autocompletion.  To use |i_CTRL-N| specifically, press |CTRL-E| first to
+dismiss the popup menu (see |complete_CTRL-E|).
+
+
 FUNCTIONS FOR FINDING COMPLETIONS			*complete-functions*
 
 This applies to 'completefunc', 'thesaurusfunc' and 'omnifunc'.
 
@@ -1,4 +1,4 @@
-*options.txt*	For Vim version 9.1.  Last change: 2025 Jul 21
+*options.txt*	For Vim version 9.1.  Last change: 2025 Jul 25
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -911,6 +911,13 @@ A jump table for the options with a short description can be found at |Q_op|.
 	the current directory won't change when navigating to it.
 	Note: When this option is on some plugins may not work.
 
+			*'autocomplete'* *'ac'* *'noautocomplete'* *'noac'*
+'autocomplete' 'ac'	boolean (default off)
+			global
+			{only available on platforms with timing support}
+	When on, Vim shows a completion menu as you type, similar to using
+	|i_CTRL-N|, but triggered automatically.  See |ins-autocompletion|.
+
 			*'autoindent'* *'ai'* *'noautoindent'* *'noai'*
 'autoindent' 'ai'	boolean	(default off)
 			local to buffer
@@ -2129,9 +2136,9 @@ A jump table for the options with a short description can be found at |Q_op|.
 		If the Dict returned by the {func} includes {"refresh": "always"},
 		the function will be invoked again whenever the leading text
 		changes.
-		If generating matches is potentially slow, |complete_check()|
-		should be used to avoid blocking and preserve editor
-		responsiveness.
+		If generating matches is potentially slow, call
+		|complete_check()| periodically to keep Vim responsive. This
+		is especially important for |ins-autocompletion|.
 	F	equivalent to using "F{func}", where the function is taken from
 		the 'completefunc' option.
 	o	equivalent to using "F{func}", where the function is taken from
@@ -2278,6 +2285,9 @@ A jump table for the options with a short description can be found at |Q_op|.
 		    completion in the preview window.  Only works in
 		    combination with "menu" or "menuone".
 
+	Only "fuzzy", "popup", "popuphidden" and "preview" have an effect when
+	'autocomplete' is enabled.
+
 	This option does not apply to |cmdline-completion|. See 'wildoptions'
 	for that.
 
 
@@ -1,4 +1,4 @@
-*quickref.txt*  For Vim version 9.1.  Last change: 2025 Jul 16
+*quickref.txt*  For Vim version 9.1.  Last change: 2025 Jul 25
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -607,6 +607,7 @@ Short explanation of each option:		*option-list*
 'arabic'	  'arab'    for Arabic as a default second language
 'arabicshape'	  'arshape' do shaping for Arabic characters
 'autochdir'	  'acd'     change directory to the file in the current window
+'autocomplete'	  'ac'      automatic completion in insert mode
 'autoindent'	  'ai'	    take indent for new line from previous line
 'autoread'	  'ar'	    autom. read file when changed outside of Vim
 'autoshelldir'	  'asd'     change directory to the shell's current directory
 
@@ -41,6 +41,7 @@ $quote	eval.txt	/*$quote*
 ']	motion.txt	/*']*
 '^	motion.txt	/*'^*
 'a	motion.txt	/*'a*
+'ac'	options.txt	/*'ac'*
 'acd'	options.txt	/*'acd'*
 'ai'	options.txt	/*'ai'*
 'akm'	options.txt	/*'akm'*
@@ -62,6 +63,7 @@ $quote	eval.txt	/*$quote*
 'as'	todo.txt	/*'as'*
 'asd'	options.txt	/*'asd'*
 'autochdir'	options.txt	/*'autochdir'*
+'autocomplete'	options.txt	/*'autocomplete'*
 'autoindent'	options.txt	/*'autoindent'*
 'autoprint'	vi_diff.txt	/*'autoprint'*
 'autoread'	options.txt	/*'autoread'*
@@ -555,6 +557,7 @@ $quote	eval.txt	/*$quote*
 'mzschemedll'	options.txt	/*'mzschemedll'*
 'mzschemegcdll'	options.txt	/*'mzschemegcdll'*
 'nf'	options.txt	/*'nf'*
+'noac'	options.txt	/*'noac'*
 'noacd'	options.txt	/*'noacd'*
 'noai'	options.txt	/*'noai'*
 'noakm'	options.txt	/*'noakm'*
@@ -571,6 +574,7 @@ $quote	eval.txt	/*$quote*
 'noas'	todo.txt	/*'noas'*
 'noasd'	options.txt	/*'noasd'*
 'noautochdir'	options.txt	/*'noautochdir'*
+'noautocomplete'	options.txt	/*'noautocomplete'*
 'noautoindent'	options.txt	/*'noautoindent'*
 'noautoread'	options.txt	/*'noautoread'*
 'noautosave'	todo.txt	/*'noautosave'*
@@ -8585,6 +8589,7 @@ inputlist()	builtin.txt	/*inputlist()*
 inputrestore()	builtin.txt	/*inputrestore()*
 inputsave()	builtin.txt	/*inputsave()*
 inputsecret()	builtin.txt	/*inputsecret()*
+ins-autocompletion	insert.txt	/*ins-autocompletion*
 ins-completion	insert.txt	/*ins-completion*
 ins-completion-menu	insert.txt	/*ins-completion-menu*
 ins-expandtab	insert.txt	/*ins-expandtab*
 
@@ -1,4 +1,4 @@
-*version9.txt*  For Vim version 9.1.  Last change: 2025 Jul 21
+*version9.txt*  For Vim version 9.1.  Last change: 2025 Jul 25
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -41604,6 +41604,7 @@ Completion~
 	"preinsert"	- highlight to be inserted values
 	"nearest"	- sort completion results by distance to cursor
 - new function |wildtrigger()| to trigger wildcard expansion
+- Support for Autocompletion has been added |ins-autocompletion|
 
 Platform specific~
 -----------------
@@ -41809,6 +41810,7 @@ Ex-Commands: ~
 
 Options: ~
 
+'autocompletion'	Enable auto completion |ins-autocompletion|
 'chistory'		Size of the quickfix stack |quickfix-stack|.
 'completefuzzycollect'	Enable fuzzy collection of candidates for (some)
 			|ins-completion| modes
 
@@ -1,7 +1,7 @@
 " These commands create the option window.
 "
 " Maintainer:	The Vim Project <https://github.com/vim/vim>
-" Last Change:	2025 Jul 16
+" Last Change:	2025 Jul 25
 " Former Maintainer:	Bram Moolenaar <Bram@vim.org>
 
 " If there already is an option window, jump to that one.
@@ -873,13 +873,15 @@ endif
 if has("insert_expand")
   call <SID>AddOption("complete", gettext("specifies how Insert mode completion works for CTRL-N and CTRL-P"))
   call append("$", "\t" .. s:local_to_buffer)
-  call <SID>OptionL("cfc")
-  call <SID>AddOption("completefuzzycollect", gettext("use fuzzy collection for specific completion modes"))
   call <SID>OptionL("cpt")
+  call <SID>AddOption("autocomplete", gettext("automatic completion in insert mode"))
+  call <SID>BinOptionG("ac", &ac)
   call <SID>AddOption("completeopt", gettext("whether to use a popup menu for Insert mode completion"))
   call <SID>OptionL("cot")
   call <SID>AddOption("completeitemalign", gettext("popup menu item align order"))
   call <SID>OptionG("cia", &cia)
+  call <SID>AddOption("completefuzzycollect", gettext("use fuzzy collection for specific completion modes"))
+  call <SID>OptionL("cfc")
   if exists("+completepopup")
     call <SID>AddOption("completepopup", gettext("options for the Insert mode completion info popup"))
     call <SID>OptionG("cpp", &cpp)