diff --git a/__tests__/git-index-currency.test.ts b/__tests__/git-index-currency.test.ts
index fbe79fb7..4fae232d 100644
--- a/__tests__/git-index-currency.test.ts
+++ b/__tests__/git-index-currency.test.ts
@@ -1,6 +1,6 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
 import * as cp from 'child_process';
-import * as fs from 'fs';
+import * as fs from 'node:fs';
 import * as os from 'os';
 import * as path from 'path';
 import { CodeGraph } from '../src';
@@ -11,9 +11,9 @@ vi.mock('child_process', async importOriginal => {
   const actual = await importOriginal<typeof import('child_process')>();
   return { ...actual, execFileSync: vi.fn(actual.execFileSync) };
 });
-vi.mock('fs', async importOriginal => {
-  const actual = await importOriginal<typeof import('fs')>();
-  return { ...actual, readFileSync: vi.fn(actual.readFileSync) };
+vi.mock('node:fs', async importOriginal => {
+  const actual = await importOriginal<typeof import('node:fs')>();
+  return { ...actual, readFileSync: vi.fn(actual.readFileSync), openSync: vi.fn(actual.openSync) };
 });
 
 describe('git index currency across commits and restores (#1829)', () => {
@@ -132,12 +132,12 @@ describe('git index currency across commits and restores (#1829)', () => {
 
   it('keeps a committed path pending when sync cannot read it', async () => {
     write('new.ts', 'newSymbol'); commit();
-    const real = fs.readFileSync;
+    const real = fs.openSync;
     let injected = 0;
-    vi.spyOn(fs, 'readFileSync').mockImplementation(((file: any, ...args: any[]) => {
+    vi.spyOn(fs, 'openSync').mockImplementation(((file: any, ...args: any[]) => {
       if (String(file) === path.join(root, 'new.ts')) { injected++; throw new Error('Injected transient read error'); }
       return (real as any)(file, ...args);
-    }) as typeof fs.readFileSync);
+    }) as typeof fs.openSync);
     await cg.sync();
     expect(injected).toBeGreaterThan(0);
     expect(symbols('newSymbol')).not.toContain('newSymbol');
diff --git a/docs/validation/release-linux-shards.py b/docs/validation/release-linux-shards.py
index 7f478879..b4fe7c05 100644
--- a/docs/validation/release-linux-shards.py
+++ b/docs/validation/release-linux-shards.py
@@ -6,6 +6,7 @@ out=root/'.qa/release-full';out.mkdir(parents=True,exist_ok=True)
 files=sorted(str(p.relative_to(root)) for p in (root/'__tests__').rglob('*.test.ts'))
 manifest={'revision':expected,'files':files,'commands':[]}
 (out/'manifest.json').write_text(json.dumps(manifest,indent=2)+'\n')
+failures=[]
 for shard in range(1,5):
  name=f'release-final-shard-{shard}'
  if (root/'.qa/recovery'/f'{name}.json').exists():
@@ -15,7 +16,7 @@ for shard in range(1,5):
  assert subprocess.check_output(['git','rev-parse','HEAD'],cwd=root,text=True).strip()==expected
  command=['node','node_modules/vitest/vitest.mjs','run',f'--shard={shard}/4','--maxWorkers=1','--minWorkers=1','--reporter=default','--reporter=json',f'--outputFile.json=.qa/release-full/shard-{shard}.json']
  result=subprocess.run(['python3','docs/validation/release-command.py',name,*command],cwd=root)
- if result.returncode:sys.exit(result.returncode)
+ if result.returncode:failures.append(shard)
 seen=[];counts={'passed':0,'failed':0,'pending':0}
 for shard in range(1,5):
  report=json.loads((out/f'shard-{shard}.json').read_text())
@@ -23,5 +24,7 @@ for shard in range(1,5):
   seen.append(str(pathlib.Path(suite['name']).relative_to(root)))
  for k in counts:counts[k]+=report[{'passed':'numPassedTests','failed':'numFailedTests','pending':'numPendingTests'}[k]]
 assert len(seen)==len(set(seen)) and set(seen)==set(files),(len(seen),len(files),set(files)-set(seen))
-summary={'revision':expected,'counts':counts,'testFiles':len(files),'exactlyOnce':True,'finished':datetime.datetime.now(datetime.timezone.utc).isoformat()}
+summary={'revision':expected,'counts':counts,'testFiles':len(files),'exactlyOnce':True,'success':not failures and counts['failed']==0,'failedShards':failures,'finished':datetime.datetime.now(datetime.timezone.utc).isoformat()}
 (out/'summary.json').write_text(json.dumps(summary,indent=2)+'\n');print(json.dumps(summary),flush=True)
+
+sys.exit(0 if summary['success'] else 1)
diff --git a/scripts/validation/release-native.cjs b/scripts/validation/release-native.cjs
index bfd66b3c..805b99ca 100644
--- a/scripts/validation/release-native.cjs
+++ b/scripts/validation/release-native.cjs
@@ -39,7 +39,7 @@ async function run(name, command, args, timeout = 360000, overrides = {}) {
   const built = await run('build', ...npmCommand(['run', 'build']));
   if (built && metadata.scope === 'repairs') {
     metadata.notRun = ['unchanged core/worker/lifecycle paths: reuse successful steps at 90516f8, run 35880834124'];
-    await run('focused', process.execPath, ['node_modules/vitest/vitest.mjs', 'run', '__tests__/db-reopen-on-replace.test.ts', '__tests__/upgrade.test.ts', '__tests__/update-check.test.ts', '__tests__/cli-ui-command.test.ts', '--maxWorkers=1', '--minWorkers=1', '--reporter=default', '--reporter=json', `--outputFile.json=${path.join(out, 'focused.json')}`], 300000);
+    await run('focused', process.execPath, ['node_modules/vitest/vitest.mjs', 'run', '__tests__/db-reopen-on-replace.test.ts', '__tests__/upgrade.test.ts', '__tests__/update-check.test.ts', '__tests__/git-index-currency.test.ts', '__tests__/cli-ui-command.test.ts', '--maxWorkers=1', '--minWorkers=1', '--reporter=default', '--reporter=json', `--outputFile.json=${path.join(out, 'focused.json')}`], 300000);
     await run('file-growth-race', process.execPath, ['scripts/validation/release-size-race.cjs','dist']);
     await run('installer-archives', process.execPath, ['scripts/validation/release-installers.cjs']);
     await run('security-negative', process.execPath, ['scripts/validation/release-security.cjs','.','dist']);