fix(prompt-gate): harden internal prompt dispatch

src/shared/prompt-failure-classifier.test.ts

@@ -0,0 +1,27 @@
+import { describe, expect, test } from "bun:test"
+
+import { isAmbiguousPromptDispatchFailure } from "./prompt-failure-classifier"
+
+describe("prompt failure classifier", () => {
+  test("#given prompt dispatch reports a generic JSON parse error #when classifying ambiguity #then it treats the dispatch as possibly accepted", () => {
+    // given
+    const error = new Error("JSON Parse error: Unexpected end of JSON input")
+
+    // when
+    const ambiguous = isAmbiguousPromptDispatchFailure(error)
+
+    // then
+    expect(ambiguous).toBe(true)
+  })
+
+  test("#given prompt dispatch timeout casing varies #when classifying ambiguity #then it treats the dispatch as possibly accepted", () => {
+    // given
+    const error = "PromptAsync Timed Out after 30000ms"
+
+    // when
+    const ambiguous = isAmbiguousPromptDispatchFailure(error)
+
+    // then
+    expect(ambiguous).toBe(true)
+  })
+})