diff --git a/runtime/ftplugin/lua.vim b/runtime/ftplugin/lua.vim
index c6ce4a0..88b1fc9 100644
--- a/runtime/ftplugin/lua.vim
+++ b/runtime/ftplugin/lua.vim
@@ -4,7 +4,7 @@
 " Previous Maintainer:	Max Ischenko <mfi@ukr.net>
 " Contributor:		Dorai Sitaram <ds26@gte.com>
 "			C.D. MacEachern <craig.daniel.maceachern@gmail.com>
-" Last Change:		2022 Nov 16
+" Last Change:		2022 Nov 19
 
 if exists("b:did_ftplugin")
   finish
@@ -21,7 +21,7 @@
 let &l:define = '\<function\|\<local\%(\s\+function\)\='
 
 " TODO: handle init.lua
-setlocal includeexpr=substitute(v:fname,'\.','/','g')
+setlocal includeexpr=tr(v:fname,'.','/')
 setlocal suffixesadd=.lua
 
 let b:undo_ftplugin = "setlocal cms< com< def< fo< inex< sua<"
diff --git a/runtime/ftplugin/mermaid.vim b/runtime/ftplugin/mermaid.vim
new file mode 100644
index 0000000..fe84ab3
--- /dev/null
+++ b/runtime/ftplugin/mermaid.vim
@@ -0,0 +1,49 @@
+" Vim filetype plugin
+" Language:     Mermaid
+" Maintainer:   Craig MacEachern <https://github.com/craigmac/vim-mermaid>
+" Last Change:  2022 Oct 13
+
+if exists("b:did_ftplugin")
+  finish
+endif
+
+let s:keepcpo= &cpo
+set cpo&vim
+
+" Use mermaid live editor's style
+setlocal expandtab
+setlocal shiftwidth=2
+setlocal softtabstop=-1
+setlocal tabstop=4
+
+" TODO: comments, formatlist stuff, based on what?
+setlocal comments=b:#,fb:-
+setlocal commentstring=#\ %s
+setlocal formatoptions+=tcqln formatoptions-=r formatoptions-=o
+setlocal formatlistpat=^\\s*\\d\\+\\.\\s\\+\\\|^\\s*[-*+]\\s\\+\\\|^\\[^\\ze[^\\]]\\+\\]:\\&^.\\{4\\}
+
+if exists('b:undo_ftplugin')
+  let b:undo_ftplugin .= "|setl cms< com< fo< flp< et< ts< sts< sw<"
+else
+  let b:undo_ftplugin = "setl cms< com< fo< flp< et< ts< sts< sw<"
+endif
+
+if !exists("g:no_plugin_maps") && !exists("g:no_markdown_maps")
+  nnoremap <silent><buffer> [[ :<C-U>call search('\%(^#\{1,5\}\s\+\S\\|^\S.*\n^[=-]\+$\)', "bsW")<CR>
+  nnoremap <silent><buffer> ]] :<C-U>call search('\%(^#\{1,5\}\s\+\S\\|^\S.*\n^[=-]\+$\)', "sW")<CR>
+  xnoremap <silent><buffer> [[ :<C-U>exe "normal! gv"<Bar>call search('\%(^#\{1,5\}\s\+\S\\|^\S.*\n^[=-]\+$\)', "bsW")<CR>
+  xnoremap <silent><buffer> ]] :<C-U>exe "normal! gv"<Bar>call search('\%(^#\{1,5\}\s\+\S\\|^\S.*\n^[=-]\+$\)', "sW")<CR>
+  let b:undo_ftplugin .= '|sil! nunmap <buffer> [[|sil! nunmap <buffer> ]]|sil! xunmap <buffer> [[|sil! xunmap <buffer> ]]'
+endif
+
+" if has("folding") && get(g:, "markdown_folding", 0)
+"   setlocal foldexpr=MarkdownFold()
+"   setlocal foldmethod=expr
+"   setlocal foldtext=MarkdownFoldText()
+"   let b:undo_ftplugin .= "|setl foldexpr< foldmethod< foldtext<"
+" endif
+
+let &cpo = s:keepcpo
+unlet s:keepcpo
+
+" vim:set sw=2:
diff --git a/runtime/ftplugin/obse.vim b/runtime/ftplugin/obse.vim
new file mode 100644
index 0000000..6d865f0
--- /dev/null
+++ b/runtime/ftplugin/obse.vim
@@ -0,0 +1,70 @@
+" Vim filetype plugin file
+" Language:    Oblivion Language (obl)
+" Original Creator: Kat <katisntgood@gmail.com>
+" Maintainer:  Kat <katisntgood@gmail.com>
+" Created:     August 08, 2021
+" Last Change: 13 November 2022
+
+if exists("b:did_ftplugin")
+  finish
+endif
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+let b:undo_ftplugin = "setl com< cms<"
+
+noremap <script> <buffer> <silent> [[ <nop>
+noremap <script> <buffer> <silent> ]] <nop>
+
+noremap <script> <buffer> <silent> [] <nop>
+noremap <script> <buffer> <silent> ][ <nop>
+
+setlocal commentstring=;%s
+setlocal comments=:;
+
+function s:NextSection(type, backwards, visual)
+    if a:visual
+        normal! gv
+    endif
+
+  if a:type == 1
+    let pattern = '\v(\n\n^\S|%^)'
+    let flags = 'e'
+  elseif a:type == 2
+    let pattern = '\v^\S.*'
+    let flags = ''
+  endif
+
+  if a:backwards
+    let dir = '?'
+  else
+    let dir = '/'
+  endif
+
+  execute 'silent normal! ' . dir . pattern . dir . flags . "\r"
+endfunction
+
+noremap <script> <buffer> <silent> ]]
+  \ :call <SID>NextSection(1, 0, 0)<cr>
+
+noremap <script> <buffer> <silent> [[
+  \ :call <SID>NextSection(1, 1, 0)<cr>
+
+noremap <script> <buffer> <silent> ][
+  \ :call <SID>NextSection(2, 0, 0)<cr>
+
+noremap <script> <buffer> <silent> []
+  \ :call <SID>NextSection(2, 1, 0)<cr>
+
+vnoremap <script> <buffer> <silent> ]]
+  \ :<c-u>call <SID>NextSection(1, 0, 1)<cr>
+vnoremap <script> <buffer> <silent> [[
+  \ :<c-u>call <SID>NextSection(1, 1, 1)<cr>
+vnoremap <script> <buffer> <silent> ][
+  \ :<c-u>call <SID>NextSection(2, 0, 1)<cr>
+vnoremap <script> <buffer> <silent> []
+  \ :<c-u>call <SID>NextSection(2, 1, 1)<cr>
+
+let &cpo = s:cpo_save
+unlet s:cpo_save