test(gsd): add regression tests for wave 1 critical fixes

Covers event log cmd format normalization (hyphens + underscores),
extractEntityKey for complete-milestone, and isClosedStatus
including skipped status.

src/resources/extensions/gsd/tests/wave1-critical-regressions.test.ts

@@ -0,0 +1,49 @@
+// GSD State Machine — Wave 1 Critical Regression Tests
+// Validates fixes for event log format mismatch, skipped milestone status,
+// dead code removal, and replan disk-file fallback.
+
+import { describe, test } from "node:test";
+import assert from "node:assert/strict";
+import { extractEntityKey } from "../workflow-reconcile.js";
+import { isClosedStatus } from "../status-guards.js";
+import type { WorkflowEvent } from "../workflow-events.js";
+
+// ── Fix 1: Event log cmd format — hyphens and underscores both accepted ──
+
+describe("extractEntityKey normalizes cmd format", () => {
+  const baseEvent = { params: {}, ts: "", hash: "", actor: "agent" as const, session_id: "" };
+
+  test("accepts hyphenated complete-task", () => {
+    const event: WorkflowEvent = { ...baseEvent, cmd: "complete-task", params: { taskId: "T01" } };
+    const key = extractEntityKey(event);
+    assert.deepStrictEqual(key, { type: "task", id: "T01" });
+  });
+
+  test("accepts underscored complete_task (legacy)", () => {
+    const event: WorkflowEvent = { ...baseEvent, cmd: "complete_task", params: { taskId: "T01" } };
+    const key = extractEntityKey(event);
+    assert.deepStrictEqual(key, { type: "task", id: "T01" });
+  });
+
+  test("accepts hyphenated complete-slice", () => {
+    const event: WorkflowEvent = { ...baseEvent, cmd: "complete-slice", params: { sliceId: "S01" } };
+    const key = extractEntityKey(event);
+    assert.deepStrictEqual(key, { type: "slice", id: "S01" });
+  });
+
+  test("accepts hyphenated complete-milestone", () => {
+    const event: WorkflowEvent = { ...baseEvent, cmd: "complete-milestone", params: { milestoneId: "M001" } };
+    const key = extractEntityKey(event);
+    assert.deepStrictEqual(key, { type: "milestone", id: "M001" });
+  });
+});
+
+// ── Fix 3: getActiveMilestoneId must skip "skipped" milestones ──
+
+describe("isClosedStatus includes skipped", () => {
+  test("complete is closed", () => assert.ok(isClosedStatus("complete")));
+  test("done is closed", () => assert.ok(isClosedStatus("done")));
+  test("skipped is closed", () => assert.ok(isClosedStatus("skipped")));
+  test("pending is not closed", () => assert.ok(!isClosedStatus("pending")));
+  test("active is not closed", () => assert.ok(!isClosedStatus("active")));
+});