refactor(deadcode): privatize core test seams (#108325)

* refactor(entry): privatize compile cache internals

* refactor(logging): privatize diagnostic test seams

* refactor(plugin-state): privatize store test seams

* refactor(skills): privatize lifecycle test seams

* refactor(node-host): privatize invoke test seam

* refactor(system-agent): privatize turn test seam

* chore(deadcode): shrink core test seam baseline

src/node-host/invoke.mcp.test.ts

@@ -1,7 +1,8 @@
 /** Tests the built-in node-host MCP invocation command. */
 import { describe, expect, it, vi } from "vitest";
 import type { GatewayClient } from "../gateway/client.js";
-import { handleInvoke, testing } from "./invoke.js";
+import { handleInvoke } from "./invoke.js";
+import { testing } from "./invoke.test-support.js";
 import { NodeHostMcpError, type NodeHostMcpManager } from "./mcp.js";
 
 async function invokeMcp(manager: NodeHostMcpManager, params: unknown) {

src/node-host/invoke.run-command.test.ts

@@ -2,7 +2,7 @@ import fs from "node:fs";
 import os from "node:os";
 import path from "node:path";
 import { afterEach, describe, expect, it, vi } from "vitest";
-import { testing } from "./invoke.js";
+import { testing } from "./invoke.test-support.js";
 
 describe("runCommand", () => {
   afterEach(() => {

src/node-host/invoke.test-support.ts

@@ -0,0 +1,35 @@
+import type { RunResult } from "./invoke-types.js";
+import "./invoke.js";
+
+type NodeHostInvokeTestApi = {
+  readonly MCP_TEXT_CONTENT_MAX_BYTES: number;
+  readonly MCP_INVOKE_PAYLOAD_MAX_BYTES: number;
+  clarifyNodeExecCwdSpawnError(error: NodeJS.ErrnoException, cwd: string | undefined): string;
+  runCommand(
+    argv: string[],
+    cwd: string | undefined,
+    env: Record<string, string> | undefined,
+    timeoutMs: number | undefined,
+  ): Promise<RunResult>;
+};
+
+function getTestApi(): NodeHostInvokeTestApi {
+  return (globalThis as Record<PropertyKey, unknown>)[
+    Symbol.for("openclaw.nodeHostInvokeTestApi")
+  ] as NodeHostInvokeTestApi;
+}
+
+export const testing: NodeHostInvokeTestApi = {
+  get MCP_TEXT_CONTENT_MAX_BYTES() {
+    return getTestApi().MCP_TEXT_CONTENT_MAX_BYTES;
+  },
+  get MCP_INVOKE_PAYLOAD_MAX_BYTES() {
+    return getTestApi().MCP_INVOKE_PAYLOAD_MAX_BYTES;
+  },
+  clarifyNodeExecCwdSpawnError(error, cwd) {
+    return getTestApi().clarifyNodeExecCwdSpawnError(error, cwd);
+  },
+  runCommand(argv, cwd, env, timeoutMs) {
+    return getTestApi().runCommand(argv, cwd, env, timeoutMs);
+  },
+};

src/node-host/invoke.ts

@@ -1075,10 +1075,15 @@ async function sendNodeEvent(client: NodeHostClient, event: string, payload: unk
   }
 }
 
-export const testing = {
+const testing = {
   MCP_TEXT_CONTENT_MAX_BYTES,
   MCP_INVOKE_PAYLOAD_MAX_BYTES,
   clarifyNodeExecCwdSpawnError,
   runCommand,
 } as const;
+
+if (process.env.VITEST || process.env.NODE_ENV === "test") {
+  (globalThis as Record<PropertyKey, unknown>)[Symbol.for("openclaw.nodeHostInvokeTestApi")] =
+    testing;
+}
 /* oxlint-disable max-lines -- TODO: split this grandfathered oversized file. */