feat(script): add bun test summary detector

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

script/assert-test-summary.test.ts

@@ -0,0 +1,42 @@
+import { describe, expect, test } from "bun:test"
+import { hasBunTestSummary } from "./assert-test-summary"
+
+describe("bun test summary detection", () => {
+  test("#given completed bun test output #when checking for a summary #then it is accepted", () => {
+    // given
+    const output = `bun test v1.3.12 (700fc117)
+
+ 28 pass
+ 0 fail
+Ran 28 tests across 1 file. [64.00ms]
+`
+
+    // when
+    const hasSummary = hasBunTestSummary(output)
+
+    // then
+    expect(hasSummary).toBe(true)
+  })
+
+  test("#given banner-only bun test output #when checking for a summary #then it is rejected", () => {
+    // given
+    const output = "bun test v1.3.12 (700fc117)\n"
+
+    // when
+    const hasSummary = hasBunTestSummary(output)
+
+    // then
+    expect(hasSummary).toBe(false)
+  })
+
+  test("#given zero-count summary output #when checking for a summary #then it is rejected", () => {
+    // given
+    const output = "Ran 0 tests across 0 files. [1.00ms]\n"
+
+    // when
+    const hasSummary = hasBunTestSummary(output)
+
+    // then
+    expect(hasSummary).toBe(false)
+  })
+})