diff --git a/suramadu/web/flare.css b/suramadu/web/flare.css
index 57607d3..8d0ef32 100644
--- a/suramadu/web/flare.css
+++ b/suramadu/web/flare.css
@@ -101,6 +101,21 @@
   border-radius: var(--lb-radius);
 }
 
+/* The board's tags, one checkbox each. A wrapping row, so adding a fifth is
+   an edit to the list and nothing else. */
+:root .lb-flare-tags {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 4px 14px;
+  font-size: 13px;
+}
+
+:root .lb-flare-tag {
+  display: flex;
+  align-items: center;
+  cursor: pointer;
+}
+
 :root .lb-flare-notice {
   margin: 0;
   font-size: 12px;
diff --git a/suramadu/web/flare.js b/suramadu/web/flare.js
index a596939..58ec87b 100644
--- a/suramadu/web/flare.js
+++ b/suramadu/web/flare.js
@@ -25,6 +25,10 @@
     // shows up on this page.
     var BOARD_URL = "https://userinput.app/s/did:plc:a2j2g42ai6v65qpbvb6hmubi/3msr5yrvtq22g";
 
+    // What a flare can be tagged with — the board's own list, written down
+    // rather than fetched. headquarters' report dialog carries the same four.
+    var TAGS = ["bug", "feature", "question", "thanks"];
+
     // The lexicon caps an attached image blob at 1,000,000 bytes and the
     // server re-encodes at the same size, so the target leaves headroom.
     var IMAGE_BYTE_TARGET = 900000;
@@ -116,6 +120,34 @@
         reader.readAsDataURL(blob);
     }
 
+    // --- tags --------------------------------------------------------------
+
+    /*
+     * One tag, as a checkbox with its label beside it. The label wraps the
+     * box so the word is part of the hit target and names the control
+     * without an id for anything to point at.
+     */
+    function tagBox(tag) {
+        var label = el("label", "lb-flare-tag");
+        var box = el("input");
+        box.type = "checkbox";
+        box.value = tag;
+        label.appendChild(box);
+        label.appendChild(document.createTextNode(" " + tag));
+        return label;
+    }
+
+    /* The values of the ticked boxes, in the order the board listed them. */
+    function ticked(tagRow) {
+        var boxes = tagRow.querySelectorAll("input:checked");
+        var values = [];
+        var i;
+        for (i = 0; i < boxes.length; i++) {
+            values.push(boxes[i].value);
+        }
+        return values;
+    }
+
     // --- dialog ------------------------------------------------------------
 
     var el = function (tag, className, text) {
@@ -166,6 +198,13 @@
         body.placeholder = "What were you doing, and what did you expect instead?";
         dialog.appendChild(body);
 
+        var tagRow = el("div", "lb-flare-tags");
+        var t;
+        for (t = 0; t < TAGS.length; t++) {
+            tagRow.appendChild(tagBox(TAGS[t]));
+        }
+        dialog.appendChild(tagRow);
+
         var attach = el("label", "lb-flare-attach");
         var tick = el("input");
         tick.type = "checkbox";
@@ -226,7 +265,7 @@
         var send = el("button", "lb-flare-send", "Send flare");
         send.type = "button";
         send.addEventListener("click", function () {
-            submit(title.value, body.value, tick.checked ? screenshot : null, send, status);
+            submit(title.value, body.value, ticked(tagRow), tick.checked ? screenshot : null, send, status);
         });
         row.appendChild(send);
         dialog.appendChild(row);
@@ -242,7 +281,7 @@
         title.focus();
     }
 
-    function submit(title, body, shot, send, status) {
+    function submit(title, body, tags, shot, send, status) {
         if (send.disabled) {
             return;
         }
@@ -250,7 +289,7 @@
         status.textContent = "Sending…";
         status.className = "lb-flare-status";
 
-        var payload = { title: title, body: body };
+        var payload = { title: title, body: body, tags: tags };
         if (matchId) {
             payload.matchId = matchId;
         }
diff --git a/tests/shell/test-flare-ui.sh b/tests/shell/test-flare-ui.sh
index da35d09..0298457 100755
--- a/tests/shell/test-flare-ui.sh
+++ b/tests/shell/test-flare-ui.sh
@@ -96,6 +96,13 @@ check "the dialog says a flare posts publicly" \
 check "the notice links the board itself" \
   grep -q "userinput.app/s/" "$JS"
 
+# The tags are the board's four, written down here and in headquarters'
+# report dialog. Both lists have to say the same thing, so this pins the one
+# in this file rather than leaving a typo to show up as a tag nothing filters.
+check "the dialog offers the board's four tags" bash -c '
+  list="$(grep -o "var TAGS = \[[^]]*\]" "$1")"
+  [ "$list" = "var TAGS = [\"bug\", \"feature\", \"question\", \"thanks\"]" ]' _ "$JS"
+
 # The page's CSP allows img-src data: but not blob:, so an object URL in the
 # preview renders as a broken image. It shipped that way once.
 check "the preview never uses an object URL" \