diff --git a/docs/testing.md b/docs/testing.md
index 09b01e79c..e62d91185 100644
--- a/docs/testing.md
+++ b/docs/testing.md
@@ -112,8 +112,12 @@ Set `REA_VERIFY_HERMES_STICKY_PROFILE=1` to exercise native Hermes selection of
 a named sticky profile with `HERMES_HOME` still pointing to its root.
 
 `verify:gemini-client` requires an installed Gemini CLI (verified with
-`@google/gemini-cli@0.63.0`); select it with `REA_VERIFY_GEMINI_COMMAND`.
-The optional POSIX lane uses native `GEMINI_CLI_HOME` discovery in an isolated
+`@google/gemini-cli@0.63.0` on POSIX and native Windows); select it with
+`REA_VERIFY_GEMINI_COMMAND`. A selected `.js`, `.mjs` or `.cjs` entry point runs
+under the verifier's Node. On Windows, select the npm install's
+`node_modules/@google/gemini-cli/bundle/gemini.js`, because only a `gemini.cmd`
+shim reaches `PATH`.
+The optional lane uses native `GEMINI_CLI_HOME` discovery in an isolated
 Git project, checks setup plans, backups and idempotence, activates the installed
 personal skill, validates all forwarded input JSON Schemas against their declared
 dialect, forwards the complete REA catalog and checks full JavaScript
@@ -121,7 +125,7 @@ Evidence for a Unicode path. Use `-- chat` for ordinary chat with REA enabled,
 or `REA_VERIFY_RUNTIME_ROOT` for a production-only installed REA package.
 The local fixture exercises the real Gemini API adapter, including its
 `untrusted_context` tool-result envelope. Token counts are synthetic; live
-Google API and native Windows compatibility remain unverified. The lane disables
+Google API compatibility remains unverified. The lane disables
 the client's memory-based relaunch to preserve the caller's Node heap budget.
 
 `verify:opencode-client` requires an installed OpenCode (verified with
diff --git a/scripts/verify-gemini-client.mjs b/scripts/verify-gemini-client.mjs
index c2d940077..8d1195f74 100644
--- a/scripts/verify-gemini-client.mjs
+++ b/scripts/verify-gemini-client.mjs
@@ -2,7 +2,7 @@ import assert from "node:assert/strict";
 import { createHash } from "node:crypto";
 import { mkdir, mkdtemp, readFile, writeFile } from "node:fs/promises";
 import { tmpdir } from "node:os";
-import { join } from "node:path";
+import { join, resolve, sep } from "node:path";
 import { fileURLToPath } from "node:url";
 import Ajv2020 from "ajv/dist/2020.js";
 import {
@@ -13,14 +13,18 @@ import { exec } from "./lib/verify-package-core.mjs";
 import { createVerifierRun, completeVerifierRun } from "./lib/verifier-run.mjs";
 import { createGeminiModelFixture } from "./verify/clients/gemini-model-fixture.mjs";
 
-assert(
-  process.platform !== "win32",
-  "Native Gemini verifier requires POSIX; Windows is unverified",
-);
 const repo = fileURLToPath(new URL("..", import.meta.url));
 const runtimeRoot = process.env.REA_VERIFY_RUNTIME_ROOT ?? repo;
 const command = process.env.REA_VERIFY_GEMINI_COMMAND ?? "gemini";
 const mode = process.argv[2] ?? "call";
+// npm installs of Gemini CLI provide a JavaScript entry point; on Windows only a gemini.cmd shim reaches
+// PATH, which Node does not spawn without a shell, so a selected .js entry runs under this Node. It is
+// resolved once, because the preflight runs from the caller's directory and the client from the workspace.
+const entryPoint = /\.(c|m)?js$/iu.test(command) ? resolve(command) : undefined;
+const launch = (args) =>
+  entryPoint === undefined
+    ? [command, args]
+    : [process.execPath, [entryPoint, ...args]];
 assert(
   ["chat", "call"].includes(mode),
   "Usage: verify-gemini-client.mjs [chat|call]",
@@ -60,11 +64,15 @@ const environment = {
 let clientVersion;
 try {
   clientVersion = (
-    await exec(command, ["--version"], { env: environment, timeout: 30_000 })
+    await exec(...launch(["--version"]), { env: environment, timeout: 30_000 })
   ).stdout.trim();
 } catch (cause) {
+  const windowsHint =
+    process.platform === "win32"
+      ? " On Windows, select the JavaScript entry point; npm installs provide it as node_modules/@google/gemini-cli/bundle/gemini.js."
+      : "";
   throw new Error(
-    `Gemini preflight failed for ${command}; install Gemini CLI or set REA_VERIFY_GEMINI_COMMAND. ${String(cause)}`,
+    `Gemini preflight failed for ${command}; install Gemini CLI or set REA_VERIFY_GEMINI_COMMAND.${windowsHint} ${String(cause)}`,
   );
 }
 const original = JSON.stringify(
@@ -103,11 +111,11 @@ for (const args of [
       assert(parsed.plannedActions.some((a) => a.target === configPath));
       assert(
         parsed.plannedActions.some((a) =>
-          a.target.startsWith(join(profile, ".agents", "skills") + "/"),
+          a.target.startsWith(join(profile, ".agents", "skills") + sep),
         ),
       );
       assert(
-        parsed.plannedActions.every((a) => a.target.startsWith(profile + "/")),
+        parsed.plannedActions.every((a) => a.target.startsWith(profile + sep)),
       );
     }
   }
@@ -300,8 +308,7 @@ const fixture = await createGeminiModelFixture({
 let failure;
 try {
   const response = await exec(
-    command,
-    [
+    ...launch([
       "--model",
       "gemini-2.5-flash",
       "--approval-mode",
@@ -314,7 +321,7 @@ try {
       mode === "chat"
         ? "Say hello briefly."
         : `Use REA to analyze the JavaScript directory ${target}. Report the result.`,
-    ],
+    ]),
     {
       env: {
         ...environment,