Refactor pipeline policies, MCP registry, and unified config/runtime

tests/config.test.ts

@@ -0,0 +1,22 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import { loadConfig } from "../src/config.js";
+
+test("loads defaults and freezes config", () => {
+  const config = loadConfig({});
+
+  assert.equal(config.agentManager.maxConcurrentAgents, 4);
+  assert.equal(config.orchestration.maxDepth, 4);
+  assert.equal(config.provisioning.portRange.basePort, 36000);
+  assert.equal(config.discovery.fileRelativePath, ".agent-context/resources.json");
+  assert.equal(Object.isFrozen(config), true);
+  assert.equal(Object.isFrozen(config.orchestration), true);
+});
+
+test("validates boolean env values", () => {
+  assert.throws(
+    () => loadConfig({ CODEX_SKIP_GIT_CHECK: "maybe" }),
+    /must be "true" or "false"/,
+  );
+});
+