diff --git a/deploy/README.md b/deploy/README.md
index f202d75..1fac03a 100644
--- a/deploy/README.md
+++ b/deploy/README.md
@@ -66,6 +66,11 @@ and backup check in with Sentry Crons when /root/.waving-hands-sentry-cron-rollu
 and /root/.waving-hands-sentry-cron hold their check-in URLs (the ingest
 URL with the project's cron path and public key), so a missed night is noticed.
 
+To have every new issue, regression and reappearance posted to Slack the way
+wizwar's are, run `deploy/sentry-slack-alert.sh [#channel]` once from your own
+shell with `SENTRY_TOKEN` (an org auth token with alerts:write) and
+`SLACK_CHANNEL_ID` set; the token never leaves the shell.
+
 Before every deploy, `deploy/verify-ledgers.sh <ip>` fetches every production
 ledger and replays it with the local engine, comparing each room with what the
 server shows. A ledger the new engine refuses or replays differently stops the
diff --git a/deploy/sentry-slack-alert.sh b/deploy/sentry-slack-alert.sh
new file mode 100755
index 0000000..8172b09
--- /dev/null
+++ b/deploy/sentry-slack-alert.sh
@@ -0,0 +1,73 @@
+#!/bin/bash
+# Route every Waving Hands issue to a Slack channel: new issues (any level or
+# priority), regressions, and reappearances. Creates one Sentry workflow
+# via the alerts API. The token never leaves your shell:
+#   SENTRY_TOKEN=sntryu_... SLACK_CHANNEL_ID=C... deploy/sentry-slack-alert.sh [#channel]
+# The token needs the alerts:write scope (an org auth token from
+# https://locallygrownnet.sentry.io/settings/auth-tokens/), and Slack must
+# already be connected to the org under Settings → Integrations.
+set -euo pipefail
+: "${SENTRY_TOKEN:?SENTRY_TOKEN=sntryu_... is required (alerts:write)}"
+ORG="${SENTRY_ORG:-locallygrownnet}"
+PROJECT="${SENTRY_PROJECT:-waving-hands}"
+CHANNEL="${1:-#waving-hands-notifications}"
+API="https://us.sentry.io/api/0/organizations/$ORG"
+AUTH="Authorization: Bearer $SENTRY_TOKEN"
+
+# The Slack action takes the channel's ID as well as its name; the
+# project's error detector is looked up by project id; a workflow is bound
+# to its detectors by PUT after creation.
+SLACK_ID="${SENTRY_SLACK_INTEGRATION:-345334}"
+CHANNEL_ID="${SLACK_CHANNEL_ID:?SLACK_CHANNEL_ID=C... is required (the Slack ID of the channel)}"
+PROJECT_ID="${SENTRY_PROJECT_ID:-4512133232787456}"
+echo "Slack integration $SLACK_ID; project $PROJECT_ID; channel $CHANNEL ($CHANNEL_ID)"
+
+DETECTOR_ID=$(curl -s "$API/detectors/?project=$PROJECT_ID" -H "$AUTH" | python3 -c '
+import json, sys
+rows = json.load(sys.stdin)
+for d in (rows if isinstance(rows, list) else []):
+    if str(d.get("projectId")) == sys.argv[1] and d.get("type") == "error": print(d["id"]); break' "$PROJECT_ID")
+[ -n "$DETECTOR_ID" ] || { echo "no error detector for project $PROJECT_ID" >&2; exit 1; }
+
+PAYLOAD=$(CHANNEL="$CHANNEL" CHANNEL_ID="$CHANNEL_ID" SLACK_ID="$SLACK_ID" DETECTOR_ID="$DETECTOR_ID" python3 -c '
+import json, os
+print(json.dumps({
+  "name": "Waving Hands → Slack",
+  "enabled": True,
+  "environment": None,
+  "config": {"frequency": 0},
+  "triggers": {
+    "logicType": "any-short",
+    "conditions": [
+      {"type": "first_seen_event", "comparison": True, "conditionResult": True},
+      {"type": "regression_event", "comparison": True, "conditionResult": True},
+      {"type": "reappeared_event", "comparison": True, "conditionResult": True},
+    ],
+    "actions": [],
+  },
+  "actionFilters": [{
+    "logicType": "all",
+    "conditions": [],
+    "actions": [{
+      "type": "slack",
+      "integrationId": int(os.environ["SLACK_ID"]),
+      "data": {},
+      "config": {"targetType": "specific", "targetIdentifier": os.environ["CHANNEL_ID"], "targetDisplay": os.environ["CHANNEL"]},
+      "status": "active",
+    }],
+  }],
+  "detectorIds": [int(os.environ["DETECTOR_ID"])],
+}))')
+
+echo "creating the workflow…"
+RESPONSE=$(curl -s -w "\n%{http_code}" -X POST "$API/workflows/" -H "$AUTH" -H "Content-Type: application/json" -d "$PAYLOAD")
+CODE=$(printf '%s' "$RESPONSE" | tail -1)
+BODY=$(printf '%s' "$RESPONSE" | sed '$d')
+if [ "$CODE" != "201" ]; then
+  echo "Sentry answered $CODE:" >&2; echo "$BODY" >&2; exit 1
+fi
+WORKFLOW_ID=$(printf '%s' "$BODY" | python3 -c 'import json,sys; print(json.load(sys.stdin).get("id",""))')
+echo "created workflow $WORKFLOW_ID"
+# Binding to the detector is done by PUT, the whole workflow resent.
+curl -s -o /dev/null -w "bound to detector $DETECTOR_ID: %{http_code}\n" -X PUT "$API/workflows/$WORKFLOW_ID/" -H "$AUTH" -H "Content-Type: application/json" -d "$PAYLOAD"
+echo "done: https://$ORG.sentry.io/monitors/alerts/$WORKFLOW_ID/"