Codex changes

Co-authored-by: Codex

services/compute/tests/alert-scoring.test.ts

@@ -0,0 +1,66 @@
+import { describe, expect, it } from "bun:test";
+import type { ClassifierHitEvent } from "@islandflow/types";
+import { scoreAlert } from "../src/alert-scoring";
+import { buildFlowPacket } from "./helpers";
+
+const hit = (confidence: number): ClassifierHitEvent =>
+  ({
+    source_ts: 1,
+    ingest_ts: 1,
+    seq: 1,
+    trace_id: `hit:${confidence}`,
+    classifier_id: "test",
+    confidence,
+    direction: "neutral",
+    explanations: ["test"]
+  }) satisfies ClassifierHitEvent;
+
+describe("alert scoring", () => {
+  it("classifies <45 as low", () => {
+    const packet = buildFlowPacket({
+      features: {
+        total_premium: 44_000
+      }
+    });
+
+    const result = scoreAlert(packet, []);
+    expect(result.score).toBe(44);
+    expect(result.severity).toBe("low");
+  });
+
+  it("classifies >=45 as medium", () => {
+    const packet = buildFlowPacket({
+      features: {
+        total_premium: 45_000
+      }
+    });
+
+    const result = scoreAlert(packet, []);
+    expect(result.score).toBe(45);
+    expect(result.severity).toBe("medium");
+  });
+
+  it("classifies >=80 as high", () => {
+    const packet = buildFlowPacket({
+      features: {
+        total_premium: 65_000
+      }
+    });
+
+    const result = scoreAlert(packet, [hit(0.5)]);
+    expect(result.score).toBe(80);
+    expect(result.severity).toBe("high");
+  });
+
+  it("keeps 79 as medium", () => {
+    const packet = buildFlowPacket({
+      features: {
+        total_premium: 64_000
+      }
+    });
+
+    const result = scoreAlert(packet, [hit(0.5)]);
+    expect(result.score).toBe(79);
+    expect(result.severity).toBe("medium");
+  });
+});