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diff --git a/autoload/filetype/janet.kak b/autoload/filetype/janet.kak
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+# http://janet-lang.org
+# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
+
+# Detection
+# ‾‾‾‾‾‾‾‾‾
+
+hook global BufCreate .*[.](janet|jdn) %{
+    set-option buffer filetype janet
+}
+
+
+hook global WinSetOption filetype=janet %{
+    require-module janet
+
+    hook window ModeChange pop:insert:.* -group janet-trim-indent janet-trim-indent
+    hook window InsertChar \n -group janet-indent janet-indent-on-new-line
+    set-option buffer extra_word_chars ! @ $ '%' ^ & * - _ + = : < > . ?
+
+    hook -once -always window WinSetOption filetype=.* %{ remove-hooks window janet-.+ }
+}
+
+hook -group janet-highlight global WinSetOption filetype=janet %{
+    add-highlighter window/janet ref janet
+    hook -once -always window WinSetOption filetype=.* %{ remove-highlighter window/janet }
+}
+
+provide-module janet %{
+
+require-module lisp
+
+# Highlighters
+# ‾‾‾‾‾‾‾‾‾‾‾‾
+
+add-highlighter shared/janet regions
+add-highlighter shared/janet/code default-region group
+add-highlighter shared/janet/comment region '(?<!\\)(?:\\\\)*\K#' '$' fill comment
+add-highlighter shared/janet/comment-form region -recurse \( '(?<!\\)(?:\\\\)*\K\(comment ' '\)' fill comment
+add-highlighter shared/janet/string region '(?<!\\)(?:\\\\)*\K"' '(?<!\\)(?:\\\\)*"' fill string
+add-highlighter shared/janet/raw-string region -match-capture '(`+)' '(`+)' fill string
+add-highlighter shared/janet/code/ regex \b(nil|true|false)\b 0:value
+add-highlighter shared/janet/code/number regex \W\K(?:[\-+]?\dx?[\der._+a-f]*)\b 0:value
+add-highlighter shared/janet/code/function-definition regex \((?:defn-?|fn)\s([!@$%\^&*\-_+=:<>.?\w/]+) 1:function
+add-highlighter shared/janet/code/function-call regex \(([!@$%\^&*\-_+=:<>.?\w/]+) 1:function
+add-highlighter shared/janet/code/keyword regex \W\K:[!@$%\^&*\-_+=:<>.?\w/]+ 0:value
+add-highlighter shared/janet/code/special regex \((def-?|defn-?|var-?|fn|do|quote|if|splice|while|break|set|quasiquote|unquote|upscope)\s 1:keyword
+add-highlighter shared/janet/code/ regex \W\K(&|&opt|&keys|&named)\W 1:keyword
+
+# Commands
+# ‾‾‾‾‾‾‾‾
+
+define-command -hidden janet-trim-indent lisp-trim-indent
+
+declare-option \
+    -docstring 'regex matching the head of forms which have options *and* indented bodies' \
+    regex janet_special_indent_forms \
+    '(?:def.*|while|for|fn\*?|if(-.*|)|let.*|loop|seq|with(-.*|)|when(-.*|))|defer|do|match|var'
+
+define-command -hidden janet-indent-on-new-line %{
+    # registers: i = best align point so far; w = start of first word of form
+    evaluate-commands -draft -save-regs '/"|^@iw' -itersel %{
+        execute-keys -draft 'gk"iZ'
+        try %{
+            execute-keys -draft '[bl"i<a-Z><gt>"wZ'
+
+            try %{
+                # If a special form, indent another j
+                execute-keys -draft '"wze<a-k>\A' %opt{janet_special_indent_forms} '\z<ret><a-L>s.\K.*<ret><a-;>;"i<a-Z><gt>'
+            } catch %{
+                # If not special and parameter appears on line 1, indent to parameter
+                execute-keys -draft '"wze<a-l>s\h\K[^\s].*<ret><a-;>;"i<a-Z><gt>'
+            }
+        }
+        try %{ execute-keys -draft '[rl"i<a-Z><gt>' }
+        try %{ execute-keys -draft '[Bl"i<a-Z><gt>' }
+        execute-keys -draft '"i<a-z>a&,'
+        # trim trailing whitespace on the previous line
+        try %{ execute-keys -draft k : janet-trim-indent <ret> }
+    }
+}
+
+}