diff --git a/trikiff b/trikiff
new file mode 100755
index 0000000..28f0010
--- /dev/null
+++ b/trikiff
@@ -0,0 +1,116 @@
+#!/usr/bin/env python3
+"""Smol “three good things” notepad."""
+
+import datetime
+import re
+
+import smolcgi as scgi
+scgi.require_client_cert()
+
+
+def get_month_dir(year, month):
+    return scgi.get_user_dir() / f"{str(year).zfill(4)}-{str(month).zfill(2)}"
+
+
+def get_day_file(year, month, day):
+    filename = str(day).zfill(2) + ".gmi"
+    return get_month_dir(year, month) / filename
+
+
+def reply_home():
+    scgi.header(20, "text/gemini")
+    print("# Trikiff! 🌄🥰🌃")
+
+    print("## Actions")
+    scgi.link("/new/today", "Add kiffs of today")
+    scgi.link("/new/yesterday", "Add kiffs of yesterday")
+    scgi.link("/new", "Add kiffs for another day")
+
+    print("## This month")
+    today = datetime.date.today()
+    month_dir = get_month_dir(today.year, today.month)
+    if month_dir.is_dir():
+        print_month(month_dir)
+    else:
+        print("No kiffs yet!")
+
+    print("## Past months")
+    scgi.link("/browse", "Browse archives")
+
+
+def reply_new(date: datetime.date):
+    if (kiffs := scgi.query_string_dec):
+        kiffs = filter(lambda s: s, kiffs.split(";"))
+        kiffs = map(lambda s: "* " + s.strip(), kiffs)
+        content = "\n".join(kiffs) + "\n"
+        day_file = get_day_file(date.year, date.month, date.day)
+        if not (parent_dir := day_file.parent).exists():
+            parent_dir.mkdir(parents=True)
+        with open(get_day_file(date.year, date.month, date.day), "at") as f:
+            f.write(content)
+        scgi.redirect_temp(f"{scgi.script_name}")
+    else:
+        scgi.require_input("Input one or more kiffs (separated with ';')")
+
+
+def reply_prompt_day():
+    if (query := scgi.query_string_dec):
+        try:
+            if (match := re.match(r"^\d{1,2}$", query)):
+                date = datetime.date.today().replace(day=int(match.group(0)))
+            elif (match := re.match(r"^\d{4}-\d{2}-\d{2}$", query)):
+                date = datetime.date.fromisoformat(match.group(0))
+            else:
+                scgi.bad_request("Invalid day or date format")
+        except ValueError:
+            scgi.bad_request("Invalid day or date format")
+        scgi.redirect_temp(f"{scgi.script_name}/new/{date.isoformat()}")
+    else:
+        scgi.require_input(
+            "Which day? You can input only the day for the current month, "
+            "or a complete date using the YYYY-MM-DD format."
+        )
+
+
+def reply_browse(directory=None):
+    if directory:
+        path = scgi.get_user_dir() / directory
+        if not path.is_dir():
+            scgi.not_found()
+        scgi.header(20, "text/gemini")
+        print(f"# Kiffs for {directory}")
+        print_month(path)
+    else:
+        scgi.header(20, "text/gemini")
+        print("# Trikiff archives 📜")
+        for path in sorted(scgi.get_user_dir().iterdir(), reverse=True):
+            if not path.is_dir():
+                continue
+            scgi.link(f"/browse/{path.name}", path.name)
+
+
+def print_month(month_dir):
+    for day_filename in sorted(month_dir.iterdir(), reverse=True):
+        day = day_filename.name[:-4]
+        print(f"### {day}")
+        with open(day_filename, "rt") as f:
+            print(f.read())
+
+
+if scgi.path_info == "/new/today":
+    reply_new(datetime.date.today())
+elif scgi.path_info == "/new/yesterday":
+    reply_new(datetime.date.today() - datetime.timedelta(days=1))
+elif scgi.path_info == "/new":
+    reply_prompt_day()
+elif (match := re.match(r"^/new/(\d{4}-\d{2}-\d{2})$", scgi.path_info)):
+    try:
+        reply_new(datetime.date.fromisoformat(match.group(1)))
+    except ValueError:
+        scgi.not_found()
+elif scgi.path_info == "/browse":
+    reply_browse()
+elif (match := re.match(r"^/browse/(\d{4}-\d{2})$", scgi.path_info)):
+    reply_browse(directory=match.group(1))
+else:
+    reply_home()