chore: add free tier usage alert

infra/monitoring.ts

@@ -169,3 +169,38 @@ new honeycomb.Trigger("IncreasedProviderHttpErrorsZen", {
     },
   ],
 })
+
+new honeycomb.Trigger("IncreasedFreeTierRequests", {
+  disabled: true,
+  name: "Increased Free Tier Requests",
+  description,
+  queryJson: honeycomb.getQuerySpecificationOutput({
+    calculations: [
+      {
+        op: "COUNT",
+        name: "REQUESTS",
+        filterCombination: "AND",
+        filters: [
+          { column: "event_type", op: "=", value: "completions" },
+          { column: "user_agent", op: "contains", value: "opencode" },
+          { column: "isFreeTier", op: "=", value: "true" },
+        ],
+      },
+    ],
+    timeRange: 14400,
+  }).json,
+  alertType: "on_change",
+  frequency: 3600,
+  thresholds: [{ op: ">=", value: 50, exceededLimit: 2 }],
+  baselineDetails: [{ type: "percentage", offsetMinutes: 1440 }],
+  recipients: [
+    {
+      id: webhookRecipient.id,
+      notificationDetails: [
+        {
+          variables: [{ name: "type", value: "custom" }],
+        },
+      ],
+    },
+  ],
+})

packages/console/app/src/routes/honeycomb/webhook.ts

@@ -23,15 +23,19 @@ const honeycombWebhookPayload = z.discriminatedUnion("type", [
     type: z.literal("provider_http_errors"),
     groups,
   }),
+  basePayload.extend({
+    type: z.literal("custom"),
+  }),
 ])
 
 const postDiscordMessage = async (payload: z.infer<typeof honeycombWebhookPayload>) => {
-  const group = payload.type === "model_http_errors" ? "model" : "provider"
-  const names = (payload.groups ?? []).flatMap((item) => item.group.map((g) => g.value))
+  const group =
+    payload.type === "model_http_errors" ? "model" : payload.type === "provider_http_errors" ? "provider" : undefined
+  const names = payload.type === "custom" ? [] : payload.groups.flatMap((item) => item.group.map((g) => g.value))
 
   const content = [
     `[**${payload.isTest ? "[TEST] " : ""}${payload.name ?? "Honeycomb alert"}**](${payload.url})`,
-    names.length > 0 ? `Affected ${group}s:` : undefined,
+    group && names.length > 0 ? `Affected ${group}s:` : undefined,
     ...names.map((name) => `- ${name}`),
     "",
     `<@&${DISCORD_ALERT_ROLE_ID}>`,