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diff --git a/README.md b/README.md
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+insert\_cancel.vim
+==================
+
+This plugin provides a mapping target to cancel an insert operation, by
+triggering `i_CTRL-C` and undoing a change if one was made by that insert
+operation.
+
+License
+-------
+
+Copyright (c) [Tom Ryder][1]. Distributed under the same terms as Vim itself.
+See `:help license`.
+
+[1]: https://sanctum.geek.nz/
diff --git a/VERSION b/VERSION
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+0.1.0
diff --git a/doc/insert_cancel.txt b/doc/insert_cancel.txt
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+*insert_cancel.txt*	For Vim version 6.0	Last change: 2018 July 02
+
+DESCRIPTION				*insert_cancel*
+
+This plugin provides a mapping target to cancel an insert operation, by
+triggering |i_CTRL-C| and undoing a change if one was made by that insert
+operation.
+
+REQUIREMENTS				*insert_cancel-requirements*
+
+This plugin is only available if 'compatible' is not set. It works best if
+|+autocmd| is available, with the |InsertLeave| event from |version7|. It does
+a much better job of telling whether a change was made with these features
+available, which avoids undoing unrelated changes inappropriately.
+
+MAPPINGS				*insert_cancel-mappings*
+
+					*<Plug>InsertCancel*
+The single mapping target provided is |<Plug>InsertCancel|, mappable in any
+mode. There is no default key mapping to the target; you should define this
+yourself in your |vimrc|. For example:
+>
+	imap <C-C> <Plug>InsertCancel
+<
+AUTHOR					*insert_cancel-author*
+
+Written and maintained by Tom Ryder <tom@sanctum.geek.nz>.
+
+LICENSE					*insert_cancel-license*
+
+Licensed for distribution under the same terms as Vim itself (see |license|).
+
+ vim:tw=78:ts=8:ft=help:norl:
diff --git a/plugin/insert_cancel.vim b/plugin/insert_cancel.vim
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+"
+" insert_cancel.vim: Cancel the current insert operation by undoing the last
+" change upon insert exit, if we made a change; intended for remapping
+" insert-mode Ctrl-C.
+"
+" Author: Tom Ryder <tom@sanctum.geek.nz>
+" License: Same as Vim itself
+"
+if exists('g:loaded_insert_cancel') || &compatible
+  finish
+endif
+if v:version < 600
+  finish
+endif
+let g:loaded_insert_cancel = 1
+
+" InsertEnter is only available from Vim 7
+if has('autocmd') && v:version > 700
+  augroup insert_cancel
+    autocmd!
+    autocmd InsertEnter *
+          \ let s:changenr = changenr()
+  augroup END
+endif
+
+" Try to figure out whether we made a change to undo, undo it if so
+function! s:InsertCancel()
+  if &modified && (!exists('s:changenr') || changenr() > s:changenr)
+    silent undo
+  endif
+endfunction
+
+" Provide plugin mapping
+inoremap <silent> <Plug>InsertCancel
+      \ <C-C>:<C-U>call <SID>InsertCancel()<CR>