diff --git a/tools/lore-watch.sh b/tools/lore-watch.sh
new file mode 100755
index 000000000..bd9deb2c0
--- /dev/null
+++ b/tools/lore-watch.sh
@@ -0,0 +1,72 @@
+#!/bin/bash
+# lore-watch — daily check for replies to mfritsche@reauktion.de threads on
+# linux-media public-inbox. Mails any matches to mfritsche@reauktion.de.
+#
+# Started 2026-04-29 to track the vb2 dma_resv RFC series.
+
+set -euo pipefail
+
+REPO=$HOME/.local/state/lore-watch/linux-media-pi.git
+STATE=$HOME/.local/state/lore-watch
+mkdir -p "$STATE"
+
+if [ ! -d "$REPO" ]; then
+  git clone --bare --depth 200 https://lore.kernel.org/linux-media/0 "$REPO" >/dev/null 2>&1
+fi
+
+# If state is missing, seed it with current HEAD and exit (nothing to compare).
+if [ ! -s "$STATE/last-seen.sha" ]; then
+  git -C "$REPO" fetch --depth 200 origin >/dev/null 2>&1 || true
+  git -C "$REPO" rev-parse FETCH_HEAD > "$STATE/last-seen.sha" 2>/dev/null || \
+    git -C "$REPO" rev-parse HEAD > "$STATE/last-seen.sha"
+  exit 0
+fi
+
+LAST=$(cat "$STATE/last-seen.sha")
+git -C "$REPO" fetch --depth 200 origin master >/dev/null 2>&1 || \
+  git -C "$REPO" fetch --depth 200 origin >/dev/null 2>&1
+HEAD=$(git -C "$REPO" rev-parse FETCH_HEAD 2>/dev/null || git -C "$REPO" rev-parse HEAD)
+
+if [ "$LAST" = "$HEAD" ]; then
+  exit 0   # no new messages
+fi
+
+# Walk new commits, only flag messages where the user's email appears in
+# headers (To/Cc/From). This catches replies (which keep the original
+# To/Cc per kernel convention) without matching unrelated videobuf2 threads.
+TMPDIR=$(mktemp -d)
+trap 'rm -rf "$TMPDIR"' EXIT
+
+RANGE="$LAST..$HEAD"
+HITS=0
+
+while read -r SHA; do
+  MSG=$(git -C "$REPO" show "$SHA:m" 2>/dev/null) || continue
+  HDR=$(printf '%s\n' "$MSG" | sed '/^$/q')
+  if printf '%s' "$HDR" | grep -qi "mfritsche@reauktion\.de"; then
+    {
+      printf 'commit:    %s\n' "$SHA"
+      printf '%s\n' "$HDR" | grep -iE '^(From|Subject|Date|Message-Id|In-Reply-To):' | head -10
+      printf '\n--- snippet ---\n'
+      printf '%s\n' "$MSG" | sed -n '/^$/,${p;}' | head -40
+      printf '\n=========================================================\n\n'
+    } >> "$TMPDIR/digest.txt"
+    HITS=$((HITS + 1))
+  fi
+done < <(git -C "$REPO" log --reverse --format=%H "$RANGE")
+
+# Update state regardless of hits, so next run only sees newer messages
+echo "$HEAD" > "$STATE/last-seen.sha"
+
+if [ "$HITS" -gt 0 ]; then
+  {
+    printf 'Subject: [lore-watch] %d new linux-media message(s) referencing your threads\n' "$HITS"
+    printf 'From: lore-watch <mfritsche@reauktion.de>\n'
+    printf 'To: mfritsche@reauktion.de\n'
+    printf '\n'
+    printf 'Daily lore.kernel.org/linux-media scan caught %d message(s) that\n' "$HITS"
+    printf 'reference your address or vb2 dma_resv subject keywords:\n\n'
+    cat "$TMPDIR/digest.txt"
+    printf '\n-- \n(noether ~/.local/bin/lore-watch.sh, scheduled daily)\n'
+  } | /usr/bin/msmtp -t
+fi