diff --git a/runtime/syntax/vim.vim b/runtime/syntax/vim.vim
index ac295e0..4ccaa62 100644
--- a/runtime/syntax/vim.vim
+++ b/runtime/syntax/vim.vim
@@ -2,24 +2,30 @@
 " Language:	   Vim script
 " Maintainer:	   Hirohito Higashi <h.east.727 ATMARK gmail.com>
 "	   Doug Kearns <dougkearns@gmail.com>
-" Last Change:	   2025 Mar 06
+" Last Change:	   2025 Mar 09
 " Former Maintainer: Charles E. Campbell
 
 " DO NOT CHANGE DIRECTLY.
 " THIS FILE PARTLY GENERATED BY gen_syntax_vim.vim.
 " (Search string "GEN_SYN_VIM:" in this file)
 
-" Automatically generated keyword lists: {{{1
-
-" Quit when a syntax file was already loaded {{{2
+" Quit when a syntax file was already loaded {{{1
 if exists("b:current_syntax")
   finish
 endif
 let s:keepcpo= &cpo
 set cpo&vim
 
+" Feature testing {{{1
+
 let s:vim9script = "\n" .. getline(1, 32)->join("\n") =~# '\n\s*vim9\%[script]\>'
 
+function s:has(feature)
+  return has(a:feature) || index(get(g:, "vimsyn_vim_features", []), a:feature) != -1
+endfunction
+
+" Automatically generated keyword lists: {{{1
+
 " vimTodo: contains common special-notices for comments {{{2
 " Use the vimCommentGroup cluster to add your own.
 syn keyword vimTodo contained	COMBAK	FIXME	TODO	XXX
@@ -63,7 +69,6 @@
 syn keyword vimOption contained invet invexpandtab invex invexrc invfic invfileignorecase invfixeol invfixendofline invfen invfoldenable invfs invfsync invgd invgdefault invguipty invhid invhidden invhk invhkmap invhkp invhkmapp invhls invhlsearch invicon invic invignorecase invimc invimcmdline invimd invimdisable invis invincsearch invinf invinfercase invim invinsertmode invjs invjoinspaces invlnr invlangnoremap invlrm invlangremap invlz invlazyredraw invlbr invlinebreak invlisp invlist invlpl invloadplugins invmagic invml invmodeline invmle invmodelineexpr invma invmodifiable invmod invmodified invmore invmousef invmousefocus invmh invmousehide invmousemev invmousemoveevent invnu invnumber invodev invopendevice invpaste invpi invpreserveindent invpvw invpreviewwindow
 syn keyword vimOption contained invprompt invro invreadonly invrnu invrelativenumber invremap invrs invrestorescreen invri invrevins invrl invrightleft invru invruler invscb invscrollbind invscf invscrollfocus invsecure invssl invshellslash invstmp invshelltemp invsr invshiftround invsn invshortname invsc invshowcmd invsft invshowfulltag invsm invshowmatch invsmd invshowmode invscs invsmartcase invsi invsmartindent invsta invsmarttab invsms invsmoothscroll invspell invsb invsplitbelow invspr invsplitright invsol invstartofline invswf invswapfile invtbs invtagbsearch invtr invtagrelative invtgst invtagstack invtbidi invtermbidi invtgc invtermguicolors invterse invta invtextauto invtx invtextmode invtop invtildeop invto invtimeout invtitle invttimeout invtbi invttybuiltin
 syn keyword vimOption contained invtf invttyfast invudf invundofile invvb invvisualbell invwarn invwiv invweirdinvert invwic invwildignorecase invwmnu invwildmenu invwfb invwinfixbuf invwfh invwinfixheight invwfw invwinfixwidth invwrap invws invwrapscan invwrite invwa invwriteany invwb invwritebackup invxtermcodes
-
 " termcap codes (which can also be set) {{{2
 " GEN_SYN_VIM: vimOption term output code, START_STR='syn keyword vimOption contained', END_STR='skipwhite nextgroup=vimSetEqual,vimSetMod'
 syn keyword vimOption contained t_AB t_AF t_AU t_AL t_al t_bc t_BE t_BD t_cd t_ce t_Ce t_CF t_cl t_cm t_Co t_CS t_Cs t_cs t_CV t_da t_db t_DL t_dl t_ds t_Ds t_EC t_EI t_fs t_fd t_fe t_GP t_IE t_IS t_ke t_ks t_le t_mb t_md t_me t_mr t_ms t_nd t_op t_RF t_RB t_RC t_RI t_Ri t_RK t_RS t_RT t_RV t_Sb t_SC t_se t_Sf t_SH t_SI t_Si t_so t_SR t_sr t_ST t_Te t_te t_TE t_ti t_TI t_Ts t_ts t_u7 t_ue t_us t_Us t_ut t_vb t_ve t_vi t_VS t_vs t_WP t_WS t_XM t_xn t_xs t_ZH t_ZR t_8f t_8b t_8u t_xo skipwhite nextgroup=vimSetEqual,vimSetMod
@@ -78,6 +83,29 @@
 syn match   vimOption contained	"t_%i"
 syn match   vimOption contained	"t_k;"
 
+" vimOptions: These are the variable names {{{2
+" GEN_SYN_VIM: vimOption normal variable,           START_STR='syn keyword vimOptionVarName contained', END_STR=''
+syn keyword vimOptionVarName contained al aleph ari allowrevins ambw ambiwidth arab arabic arshape arabicshape acd autochdir ai autoindent ar autoread asd autoshelldir aw autowrite awa autowriteall bg background bs backspace bk backup bkc backupcopy bdir backupdir bex backupext bsk backupskip bdlay balloondelay beval ballooneval bevalterm balloonevalterm bexpr balloonexpr bo belloff bin binary bomb brk breakat bri breakindent briopt breakindentopt bsdir browsedir bh bufhidden bl buflisted bt buftype cmp casemap cdh cdhome cd cdpath cedit ccv charconvert cin cindent cink cinkeys cino cinoptions cinsd cinscopedecls cinw cinwords cb clipboard ch cmdheight cwh cmdwinheight cc colorcolumn co columns com comments cms commentstring cp compatible cpt complete cfu completefunc
+syn keyword vimOptionVarName contained cfc completefuzzycollect cia completeitemalign cot completeopt cpp completepopup csl completeslash cocu concealcursor cole conceallevel cf confirm ci copyindent cpo cpoptions cm cryptmethod cspc cscopepathcomp csprg cscopeprg csqf cscopequickfix csre cscoperelative cst cscopetag csto cscopetagorder csverb cscopeverbose crb cursorbind cuc cursorcolumn cul cursorline culopt cursorlineopt debug def define deco delcombine dict dictionary diff dex diffexpr dip diffopt dg digraph dir directory dy display ead eadirection ed edcompatible emo emoji enc encoding eof endoffile eol endofline ea equalalways ep equalprg eb errorbells ef errorfile efm errorformat ek esckeys ei eventignore eiw eventignorewin et expandtab ex exrc fenc fileencoding
+syn keyword vimOptionVarName contained fencs fileencodings ff fileformat ffs fileformats fic fileignorecase ft filetype fcs fillchars ffu findfunc fixeol fixendofline fcl foldclose fdc foldcolumn fen foldenable fde foldexpr fdi foldignore fdl foldlevel fdls foldlevelstart fmr foldmarker fdm foldmethod fml foldminlines fdn foldnestmax fdo foldopen fdt foldtext fex formatexpr flp formatlistpat fo formatoptions fp formatprg fs fsync gd gdefault gfm grepformat gp grepprg gcr guicursor gfn guifont gfs guifontset gfw guifontwide ghr guiheadroom gli guiligatures go guioptions guipty gtl guitablabel gtt guitabtooltip hf helpfile hh helpheight hlg helplang hid hidden hl highlight hi history hk hkmap hkp hkmapp hls hlsearch icon iconstring ic ignorecase imaf imactivatefunc
+syn keyword vimOptionVarName contained imak imactivatekey imc imcmdline imd imdisable imi iminsert ims imsearch imsf imstatusfunc imst imstyle inc include inex includeexpr is incsearch inde indentexpr indk indentkeys inf infercase im insertmode isf isfname isi isident isk iskeyword isp isprint js joinspaces jop jumpoptions key kmp keymap km keymodel kpc keyprotocol kp keywordprg lmap langmap lm langmenu lnr langnoremap lrm langremap ls laststatus lz lazyredraw lbr linebreak lines lsp linespace lisp lop lispoptions lw lispwords list lcs listchars lpl loadplugins luadll magic mef makeef menc makeencoding mp makeprg mps matchpairs mat matchtime mco maxcombine mfd maxfuncdepth mmd maxmapdepth mm maxmem mmp maxmempattern mmt maxmemtot mis menuitems mopt messagesopt
+syn keyword vimOptionVarName contained msm mkspellmem ml modeline mle modelineexpr mls modelines ma modifiable mod modified more mouse mousef mousefocus mh mousehide mousem mousemodel mousemev mousemoveevent mouses mouseshape mouset mousetime mzq mzquantum mzschemedll mzschemegcdll nf nrformats nu number nuw numberwidth ofu omnifunc odev opendevice opfunc operatorfunc pp packpath para paragraphs paste pt pastetoggle pex patchexpr pm patchmode pa path perldll pi preserveindent pvh previewheight pvp previewpopup pvw previewwindow pdev printdevice penc printencoding pexpr printexpr pfn printfont pheader printheader pmbcs printmbcharset pmbfn printmbfont popt printoptions prompt ph pumheight pw pumwidth pythondll pythonhome pythonthreedll pythonthreehome pyx pyxversion
+syn keyword vimOptionVarName contained qftf quickfixtextfunc qe quoteescape ro readonly rdt redrawtime re regexpengine rnu relativenumber remap rop renderoptions report rs restorescreen ri revins rl rightleft rlc rightleftcmd rubydll ru ruler ruf rulerformat rtp runtimepath scr scroll scb scrollbind scf scrollfocus sj scrolljump so scrolloff sbo scrollopt sect sections secure sel selection slm selectmode ssop sessionoptions sh shell shcf shellcmdflag sp shellpipe shq shellquote srr shellredir ssl shellslash stmp shelltemp st shelltype sxe shellxescape sxq shellxquote sr shiftround sw shiftwidth shm shortmess sn shortname sbr showbreak sc showcmd sloc showcmdloc sft showfulltag sm showmatch smd showmode stal showtabline ss sidescroll siso sidescrolloff scl signcolumn
+syn keyword vimOptionVarName contained scs smartcase si smartindent sta smarttab sms smoothscroll sts softtabstop spell spc spellcapcheck spf spellfile spl spelllang spo spelloptions sps spellsuggest sb splitbelow spk splitkeep spr splitright sol startofline stl statusline su suffixes sua suffixesadd swf swapfile sws swapsync swb switchbuf smc synmaxcol syn syntax tcl tabclose tal tabline tpm tabpagemax ts tabstop tbs tagbsearch tc tagcase tfu tagfunc tl taglength tr tagrelative tag tags tgst tagstack tcldll term tbidi termbidi tenc termencoding tgc termguicolors twk termwinkey twsl termwinscroll tws termwinsize twt termwintype terse ta textauto tx textmode tw textwidth tsr thesaurus tsrfu thesaurusfunc top tildeop to timeout tm timeoutlen title titlelen titleold
+syn keyword vimOptionVarName contained titlestring tb toolbar tbis toolbariconsize ttimeout ttm ttimeoutlen tbi ttybuiltin tf ttyfast ttym ttymouse tsl ttyscroll tty ttytype udir undodir udf undofile ul undolevels ur undoreload uc updatecount ut updatetime vsts varsofttabstop vts vartabstop vbs verbose vfile verbosefile vdir viewdir vop viewoptions vi viminfo vif viminfofile ve virtualedit vb visualbell warn wiv weirdinvert ww whichwrap wc wildchar wcm wildcharm wig wildignore wic wildignorecase wmnu wildmenu wim wildmode wop wildoptions wak winaltkeys wcr wincolor wi window wfb winfixbuf wfh winfixheight wfw winfixwidth wh winheight wmh winminheight wmw winminwidth winptydll wiw winwidth wrap wm wrapmargin ws wrapscan write wa writeany wb writebackup wd writedelay
+syn keyword vimOptionVarName contained xtermcodes
+" GEN_SYN_VIM: vimOption term output code variable, START_STR='syn keyword vimOptionVarName contained', END_STR=''
+syn keyword vimOptionVarName contained t_AB t_AF t_AU t_AL t_al t_bc t_BE t_BD t_cd t_ce t_Ce t_CF t_cl t_cm t_Co t_CS t_Cs t_cs t_CV t_da t_db t_DL t_dl t_ds t_Ds t_EC t_EI t_fs t_fd t_fe t_GP t_IE t_IS t_ke t_ks t_le t_mb t_md t_me t_mr t_ms t_nd t_op t_RF t_RB t_RC t_RI t_Ri t_RK t_RS t_RT t_RV t_Sb t_SC t_se t_Sf t_SH t_SI t_Si t_so t_SR t_sr t_ST t_Te t_te t_TE t_ti t_TI t_Ts t_ts t_u7 t_ue t_us t_Us t_ut t_vb t_ve t_vi t_VS t_vs t_WP t_WS t_XM t_xn t_xs t_ZH t_ZR t_8f t_8b t_8u t_xo
+syn keyword vimOptionVarName contained	t_F1 t_F2 t_F3 t_F4 t_F5 t_F6 t_F7 t_F8 t_F9 t_k1 t_K1 t_k2 t_k3 t_K3 t_k4 t_K4 t_k5 t_K5 t_k6 t_K6 t_k7 t_K7 t_k8 t_K8 t_k9 t_K9 t_KA t_kb t_kB t_KB t_KC t_kd t_kD t_KD t_KE t_KF t_KG t_kh t_KH t_kI t_KI t_KJ t_KK t_kl t_KL t_kN t_kP t_kr t_ku
+syn match   vimOptionVarName contained	"t_%1"
+syn match   vimOptionVarName contained	"t_#2"
+syn match   vimOptionVarName contained	"t_#4"
+syn match   vimOptionVarName contained	"t_@7"
+syn match   vimOptionVarName contained	"t_*7"
+syn match   vimOptionVarName contained	"t_&8"
+syn match   vimOptionVarName contained	"t_%i"
+syn match   vimOptionVarName contained	"t_k;"
+
 " unsupported settings: some were supported by vi but don't do anything in vim {{{2
 " GEN_SYN_VIM: Missing vimOption, START_STR='syn keyword vimErrSetting contained', END_STR=''
 syn keyword vimErrSetting contained akm altkeymap anti antialias ap autoprint bf beautify biosk bioskey consk conskey fk fkmap fl flash gr graphic ht hardtabs macatsui mesg novice open opt optimize oft osfiletype redraw slow slowopen sourceany w1200 w300 w9600
@@ -110,10 +138,22 @@
 syn keyword vimFuncName contained spellsuggest split sqrt srand state str2blob str2float str2list str2nr strcharlen strcharpart strchars strdisplaywidth strftime strgetchar stridx string strlen strpart strptime strridx strtrans strutf16len strwidth submatch substitute swapfilelist swapinfo swapname synID synIDattr synIDtrans synconcealed synstack system systemlist tabpagebuflist tabpagenr tabpagewinnr tagfiles taglist tan tanh tempname term_dumpdiff term_dumpload term_dumpwrite term_getaltscreen term_getansicolors term_getattr term_getcursor term_getjob term_getline term_getscrolled term_getsize term_getstatus term_gettitle term_gettty term_list term_scrape term_sendkeys term_setansicolors term_setapi term_setkill term_setrestore term_setsize term_start term_wait
 syn keyword vimFuncName contained terminalprops test_alloc_fail test_autochdir test_feedinput test_garbagecollect_now test_garbagecollect_soon test_getvalue test_gui_event test_ignore_error test_mswin_event test_null_blob test_null_channel test_null_dict test_null_function test_null_job test_null_list test_null_partial test_null_string test_option_not_set test_override test_refcount test_setmouse test_settime test_srand_seed test_unknown test_void timer_info timer_pause timer_start timer_stop timer_stopall tolower toupper tr trim trunc type typename undofile undotree uniq utf16idx values virtcol virtcol2col visualmode wildmenumode win_execute win_findbuf win_getid win_gettype win_gotoid win_id2tabwin win_id2win win_move_separator win_move_statusline win_screenpos
 syn keyword vimFuncName contained win_splitmove winbufnr wincol windowsversion winheight winlayout winline winnr winrestcmd winrestview winsaveview winwidth wordcount writefile xor
+" Predefined variable names {{{2
+" GEN_SYN_VIM: vimVarName, START_STR='syn keyword vimVimVarName contained', END_STR=''
+syn keyword vimVimVarName contained count count1 prevcount errmsg warningmsg statusmsg shell_error this_session version lnum termresponse fname lang lc_time ctype charconvert_from charconvert_to fname_in fname_out fname_new fname_diff cmdarg foldstart foldend folddashes foldlevel progname servername dying exception throwpoint register cmdbang insertmode val key profiling fcs_reason fcs_choice beval_bufnr beval_winnr beval_winid beval_lnum beval_col beval_text scrollstart swapname swapchoice swapcommand char mouse_win mouse_winid mouse_lnum mouse_col operator searchforward hlsearch oldfiles windowid progpath completed_item option_new option_old option_oldlocal option_oldglobal option_command option_type errors false true none null numbermax numbermin numbersize
+syn keyword vimVimVarName contained vim_did_enter testing t_number t_string t_func t_list t_dict t_float t_bool t_none t_job t_channel t_blob t_class t_object termrfgresp termrbgresp termu7resp termstyleresp termblinkresp event versionlong echospace argv collate exiting colornames sizeofint sizeoflong sizeofpointer maxcol python3_version t_typealias t_enum t_enumvalue stacktrace
 
-"--- syntax here and above generated by mkvimvim ---
+"--- syntax here and above generated by runtime/syntax/generator/gen_syntax_vim.vim ---
+
 " Special Vim Highlighting (not automatic) {{{1
 
+" Neovim keyword list additions {{{2
+
+if s:has("nvim")
+  syn keyword vimOptionVarName contained channel inccommand mousescroll pumblend redrawdebug scrollback shada shadafile statuscolumn termpastefilter termsync winbar winblend winhighlight
+  syn keyword vimVimVarName    contained lua msgpack_types relnum stderr termrequest virtnum
+endif
+
 " Set up commands for this syntax highlighting file {{{2
 
 com! -nargs=* Vim9 execute <q-args> s:vim9script ? "" : "contained"
@@ -251,14 +291,17 @@
 syn region vimSubscript contained	matchgroup=vimSubscriptBracket start="\[" end="]" nextgroup=vimSubscript contains=@vimExprList
 
 syn match vimVar	      contained	"\<\h[a-zA-Z0-9#_]*\>"	nextgroup=vimSubscript contains=vim9Super,vim9This
-syn match vimVar		"\<[bwglstav]:\h[a-zA-Z0-9#_]*\>"	nextgroup=vimSubscript
-syn match vimVar		"\<a:\%(000\|\d\+\)\>"	nextgroup=vimSubscript
-syn match vimFBVar      contained   "\<[bwglsta]:\h[a-zA-Z0-9#_]*\>"	nextgroup=vimSubscript
+syn match vimVar		"\<[bwglstav]:\h[a-zA-Z0-9#_]*\>"	nextgroup=vimSubscript contains=vimVarScope
+syn match vimVar		"\<a:\%(000\|1\=[0-9]\|20\)\>"	nextgroup=vimSubscript contains=vimVarScope
+syn match vimFBVar      contained	"\<[bwglsta]:\h[a-zA-Z0-9#_]*\>"	nextgroup=vimSubscript contains=vimVarScope
 
-syn match vimVimVar	"\<v:\h\w*\>"		nextgroup=vimSubscript
-syn match vimOptionVar      	"&\%([lg]:\)\=\a\+\>"	nextgroup=vimSubscript
-syn match vimOptionVar	"&t_\S[a-zA-Z0-9]\>"	nextgroup=vimSubscript
-syn match vimOptionVar        	"&t_k;"		nextgroup=vimSubscript
+" match the scope prefix independently of the retrofitted scope dictionary
+syn match vimVarScope   contained	"\<[bwglstav]:"
+syn match vimVimVar     contained	"\<[bwglstav]:\%(\h\|\d\)\@!"	nextgroup=vimSubscript
+
+syn match vimVarNameError contained "\<\h\w*\>"
+syn match vimVimVar	"\<v:"		nextgroup=vimSubscript,vimVimVarName,vimVarNameError
+syn match vimOptionVar	"&\%([lg]:\)\="		nextgroup=vimSubscript,vimOptionVarName,vimVarNameError
 syn cluster vimSpecialVar	contains=vimEnvvar,vimLetRegister,vimOptionVar,vimVimVar
 
 Vim9 syn match vim9LhsVariable	"\s\=\h[a-zA-Z0-9#_]*\ze\s\+[-+/*%]\=="
@@ -779,7 +822,7 @@
 syn region	vimUnletVars	contained
       \ start="$\I\|\h" skip=+\n\s*\\\|\n\s*"\\ \|^\s*"\\ + end="$" end="\ze[|"]"
       \ nextgroup=vimCmdSep,vimComment
-      \ contains=@vimContinue,vimEnvvar,vimVar
+      \ contains=@vimContinue,vimEnvvar,vimVar,vimVimVar
 
 VimFoldh syn region vimLetHereDoc	matchgroup=vimLetHereDocStart start='\%(^\z(\s*\)\S.*\)\@<==<<\s*trim\%(\s\+\)\@>\z(\L\S*\)'	matchgroup=vimLetHereDocStop end='^\z1\=\z2$' extend
 VimFoldh syn region vimLetHereDoc	matchgroup=vimLetHereDocStart start='=<<\%(\s*\)\@>\z(\L\S*\)'			matchgroup=vimLetHereDocStop end='^\z1$' extend
@@ -1497,7 +1540,7 @@
  hi def link vimFuncMod	Special
  hi def link vimFuncParam	vimVar
  hi def link vimFuncParamEquals	vimOper
- hi def link vimFuncScope	vimVar
+ hi def link vimFuncScope	vimVarScope
  hi def link vimFuncSID	vimNotation
  hi def link vimGroupAdd	vimSynOption
  hi def link vimGroupName	vimGroup
@@ -1567,7 +1610,7 @@
  hi def link vimOperContinueComment	vimContinueComment
  hi def link vimOption	PreProc
  hi def link vimOptionVar	Identifier
- hi def link vimVimVar	Identifier
+ hi def link vimOptionVarName	Identifier
  hi def link vimParenSep	Delimiter
  hi def link vimPatSepErr	vimError
  hi def link vimPatSepR	vimPatSep
@@ -1651,6 +1694,9 @@
  hi def link vimUserCmdKey	vimCommand
  hi def link vimUserFunc	Normal
  hi def link vimVar	Normal
+ hi def link vimVarScope	Identifier
+ hi def link vimVimVar	Identifier
+ hi def link vimVimVarName	Identifier
  hi def link vimWarn	WarningMsg
 
  hi def link vim9Abstract	vimCommand