diff --git a/list-sort.ais b/list-sort.ais
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--- /dev/null
+++ b/list-sort.ais
@@ -0,0 +1,39 @@
+/// @ 0.19.0
+### {
+	name: "List Sort"
+	version: "1.0.0"
+	author: "@bunnybeam@transfem.social"
+	description: "Adds a post form action that sorts lists in a note."
+	config: {
+		prefix: {
+			type: "string"
+			label: "Prefix"
+			description: "The prefix used to denote lines in a list. Beware of trailing whitespace!"
+			default: "- "
+		}
+	}
+}
+
+Plugin:register_post_form_action("Sort lists", @(note, rewrite) {
+	let prefix = Plugin:config.prefix
+	let lines = note.text.split(Str:lf)
+	var lines_out = []
+	var sort_buffer = []
+	each let line, lines {
+		if line.starts_with(prefix) {
+			sort_buffer.push(line)
+		} else {
+			sort_buffer.sort(lt_lower)
+			lines_out = lines_out.concat(sort_buffer)
+			sort_buffer = []
+			lines_out.push(line)
+		}
+	}
+	sort_buffer.sort(lt_lower)
+	lines_out = lines_out.concat(sort_buffer)
+	rewrite("text", lines_out.join(Str:lf))
+})
+
+@lt_lower(a, b) {
+	return Str:lt(a.lower(), b.lower())
+}