diff --git a/src/resources/extensions/gsd/tests/parallel-research-dispatch.test.ts b/src/resources/extensions/gsd/tests/parallel-research-dispatch.test.ts
new file mode 100644
index 000000000..593488df9
--- /dev/null
+++ b/src/resources/extensions/gsd/tests/parallel-research-dispatch.test.ts
@@ -0,0 +1,77 @@
+/**
+ * Parallel research slices dispatch — structural tests.
+ *
+ * Verifies the dispatch rule and prompt builder exist with correct structure.
+ */
+
+import test from "node:test";
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import { join, dirname } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+
+const dispatchSrc = readFileSync(join(__dirname, "..", "auto-dispatch.ts"), "utf-8");
+const promptsSrc = readFileSync(join(__dirname, "..", "auto-prompts.ts"), "utf-8");
+const templatePath = join(__dirname, "..", "prompts", "parallel-research-slices.md");
+const templateSrc = readFileSync(templatePath, "utf-8");
+
+// ─── Dispatch rule ────────────────────────────────────────────────────────
+
+test("dispatch: parallel-research-slices rule exists", () => {
+  assert.ok(
+    dispatchSrc.includes("parallel-research-slices"),
+    "dispatch table should have parallel-research-slices rule",
+  );
+});
+
+test("dispatch: parallel-research-slices requires 2+ slices", () => {
+  assert.ok(
+    dispatchSrc.includes("researchReadySlices.length < 2"),
+    "rule should require at least 2 slices for parallel dispatch",
+  );
+});
+
+test("dispatch: parallel-research-slices respects skip_research", () => {
+  const ruleIdx = dispatchSrc.indexOf("parallel-research-slices");
+  const ruleBlock = dispatchSrc.slice(ruleIdx, ruleIdx + 500);
+  assert.ok(
+    ruleBlock.includes("skip_research") || dispatchSrc.slice(ruleIdx - 300, ruleIdx).includes("skip_research"),
+    "rule should check skip_research preference",
+  );
+});
+
+// ─── Prompt builder ───────────────────────────────────────────────────────
+
+test("prompt: buildParallelResearchSlicesPrompt exported", () => {
+  assert.ok(
+    promptsSrc.includes("export async function buildParallelResearchSlicesPrompt"),
+    "buildParallelResearchSlicesPrompt should be exported",
+  );
+});
+
+test("prompt: builds per-slice subagent prompts", () => {
+  assert.ok(
+    promptsSrc.includes("buildResearchSlicePrompt"),
+    "parallel prompt builder should delegate to per-slice research prompts",
+  );
+});
+
+// ─── Template ─────────────────────────────────────────────────────────────
+
+test("template: parallel-research-slices.md has required variables", () => {
+  assert.ok(templateSrc.includes("{{sliceCount}}"), "template should use sliceCount");
+  assert.ok(templateSrc.includes("{{mid}}"), "template should use mid");
+  assert.ok(templateSrc.includes("{{subagentPrompts}}"), "template should use subagentPrompts");
+});
+
+// ─── Validate milestone prompt ────────────────────────────────────────────
+
+test("template: validate-milestone uses parallel reviewers", () => {
+  const validateSrc = readFileSync(join(__dirname, "..", "prompts", "validate-milestone.md"), "utf-8");
+  assert.ok(
+    validateSrc.includes("Reviewer A") && validateSrc.includes("Reviewer B") && validateSrc.includes("Reviewer C"),
+    "validate-milestone should dispatch 3 parallel reviewers",
+  );
+});