fix(gbrain): probe CLI without command builtin

test/gbrain-local-status.test.ts

@@ -21,6 +21,7 @@ import { describe, it, expect, beforeEach, afterEach } from "bun:test";
 import {
   mkdtempSync,
   writeFileSync,
+  readFileSync,
   mkdirSync,
   rmSync,
   chmodSync,
@@ -160,6 +161,16 @@ describe("lib/gbrain-local-status — five status cases", () => {
     restoreEnv = null;
   });
 
+  it("probes the gbrain executable directly instead of shelling through command -v", () => {
+    const source = readFileSync(
+      join(import.meta.dir, "..", "lib", "gbrain-local-status.ts"),
+      "utf-8",
+    );
+
+    expect(source).not.toContain('command -v gbrain');
+    expect(source).toContain('execFileSync("gbrain", ["--version"]');
+  });
+
   it("returns 'no-cli' when gbrain is not on PATH", () => {
     env = makeEnv({ withGbrain: false });
     restoreEnv = applyEnv(env);

test/gstack-gbrain-sync.test.ts

@@ -55,6 +55,13 @@ describe("gstack-gbrain-sync CLI", () => {
     expect(r.stderr).toContain("Unknown argument: --bogus");
   });
 
+  it("uses the shared local gbrain status classifier instead of shelling through command -v", () => {
+    const source = readFileSync(SCRIPT, "utf-8");
+
+    expect(source).not.toContain('command -v gbrain');
+    expect(source).toContain("localEngineStatus");
+  });
+
   it("--dry-run with --code-only reports the code import preview only", () => {
     const home = makeTestHome();
     const gstackHome = join(home, ".gstack");

test/gstack-memory-ingest.test.ts

@@ -421,6 +421,13 @@ esac
 }
 
 describe("gstack-memory-ingest writer (gbrain v0.20+ batch `import` interface)", () => {
+  it("probes the gbrain executable directly instead of shelling through command -v", () => {
+    const source = readFileSync(SCRIPT, "utf-8");
+
+    expect(source).not.toContain('command -v gbrain');
+    expect(source).toContain('execFileSync("gbrain", ["--help"]');
+  });
+
   it("invokes `gbrain import <dir> --no-embed --json` exactly once with hierarchical staging", () => {
     const home = makeTestHome();
     const gstackHome = join(home, ".gstack");