import { afterAll, beforeAll, describe, expect, test } from 'bun:test';
import * as fs from 'node:fs';
import * as os from 'node:os';
import * as path from 'node:path';
import { createHash } from 'node:crypto';
import { spawn, spawnSync } from 'node:child_process';

const ROOT = path.resolve(import.meta.dir, '..');
const windows = process.platform === 'win32';
const required = process.env.GSTACK_CSO_WINDOWS_TESTS === '1';
if (required && !windows) throw new Error('GSTACK_CSO_WINDOWS_TESTS=1 requires native Windows; emulation does not qualify the launcher.');
let temporary = '', invocationCwd = '', launcher = '', core = '', marker = '', preload = '', publisher = '', buildStage = '';
beforeAll(() => {
  if (!windows) return;
  const installed = path.join(ROOT, 'bin', 'gstack-cso-launcher.exe');
  if (!fs.existsSync(installed)) throw new Error('Native CSO launcher is missing; run bun run build:cso with MSVC first.');
  temporary = fs.mkdtempSync(path.join(fs.realpathSync(os.tmpdir()), 'CSO launcher 空間 '));
  launcher = path.join(temporary, 'gstack-cso-launcher.exe');
  core = path.join(temporary, 'gstack-cso-core.exe');
  invocationCwd = path.join(temporary, 'audited cwd');
  fs.mkdirSync(invocationCwd);
  marker = path.join(temporary, 'preload-ran');
  preload = path.join(temporary, 'preload.ts');
  fs.writeFileSync(preload, `import {writeFileSync} from 'node:fs'; writeFileSync(${JSON.stringify(marker)}, 'startup injection');`);
  const source = path.join(temporary, 'core-fixture.ts');
  fs.writeFileSync(source, `import {existsSync,writeFileSync} from 'node:fs';
const hold=process.argv.indexOf('--hold-until');
if(hold>=0){writeFileSync(process.argv[hold+1],String(process.pid));while(!existsSync(process.argv[hold+2]))await Bun.sleep(10);writeFileSync(process.argv[hold+3],'exited');}
process.stdout.write(JSON.stringify({argv:process.argv.slice(2),env:process.env,cwd:process.cwd()}));
if(process.argv.includes('--exit-23'))process.exit(23);`);
  const compiled = spawnSync(process.execPath, ['build', '--compile', '--no-compile-autoload-dotenv', '--no-compile-autoload-bunfig', '--no-compile-autoload-tsconfig', '--no-compile-autoload-package-json', source, '--outfile', core], { encoding: 'utf8', timeout: 60_000 });
  expect(compiled.status).toBe(0);
  const digest = createHash('sha256').update(fs.readFileSync(core)).digest('hex');
  buildStage = fs.mkdtempSync(path.join(ROOT, 'bin', '.gstack-cso-stage.windows-launcher-test.'));
  const stagedLauncher = path.join(buildStage, 'gstack-cso-launcher.exe');
  const stagedPublisher = path.join(buildStage, 'gstack-cso-publish-lock.exe');
  const native = spawnSync('powershell.exe', ['-NoProfile', '-NonInteractive', '-ExecutionPolicy', 'Bypass',
    '-File', path.join(ROOT, 'scripts', 'build-cso-windows.ps1'), '-RepoRoot', ROOT,
    '-OutputPath', stagedLauncher, '-LockOutputPath', stagedPublisher, '-CoreSha256', digest, '-GitExePath', Bun.which('git')!],
  { encoding: 'utf8', timeout: 60_000 });
  if (native.status !== 0) throw new Error(`Fixture launcher compilation failed: ${native.stdout}${native.stderr}`);
  fs.copyFileSync(stagedLauncher, launcher);
  publisher = path.join(temporary, 'gstack-cso-publish-lock.exe');
  fs.copyFileSync(stagedPublisher, publisher);
  fs.writeFileSync(path.join(temporary, '.gstack-cso-generation.lock'), '');
  fs.writeFileSync(path.join(temporary, '.gstack-cso-generation'), `${digest}\n`);
  fs.rmSync(buildStage, { recursive: true, force: true }); buildStage = '';
}, 140_000);
afterAll(() => {
  if (buildStage) fs.rmSync(buildStage, { recursive: true, force: true });
  if (temporary) fs.rmSync(temporary, { recursive: true, force: true });
});

function launchEnvironment(extra: Record<string, string> = {}) {
  return { ...process.env, HOME: temporary, GSTACK_HOME: path.join(temporary, 'state'), PATH: temporary,
    NODE_OPTIONS: '--require=hostile', RUBYOPT: '-rhostile', PYTHONPATH: temporary,
    GSTACK_CSO_SECRET_CANARY: 'must-not-cross-startup', ...extra };
}

function launch(args: string[], extra: Record<string, string> = {}, file = launcher) {
  return spawnSync(file, args, {
    cwd: invocationCwd, encoding: 'utf8', timeout: 30_000,
    env: launchEnvironment(extra),
  });
}

async function waitForFile(file: string, timeout = 10_000) {
  const deadline = Date.now() + timeout;
  while (!fs.existsSync(file) && Date.now() < deadline) await Bun.sleep(10);
  expect(fs.existsSync(file)).toBe(true);
}

function publishProbe() {
  return spawnSync(publisher, [temporary, process.execPath, '--version'], { encoding: 'utf8', timeout: 10_000 });
}

function pathIdentity(value: string) {
  const stat = fs.statSync(value, { bigint: true });
  return { device: stat.dev, file: stat.ino };
}

function expectSuccessfulProcess(result: ReturnType<typeof spawnSync>, label: string) {
  if (result.status === 0) return;
  const bounded = (value: unknown) => String(value ?? '').slice(0, 8192);
  throw new Error(`${label} failed: ${JSON.stringify({
    status: result.status,
    signal: result.signal,
    error: result.error?.message,
    stdout: bounded(result.stdout),
    stderr: bounded(result.stderr),
  })}`);
}

function filesNamed(root: string, name: string): string[] {
  const found: string[] = [];
  const walk = (directory: string) => {
    let entries: fs.Dirent[];
    try { entries = fs.readdirSync(directory, { withFileTypes: true }); } catch { return; }
    for (const entry of entries) {
      const candidate = path.join(directory, entry.name);
      if (entry.isSymbolicLink()) continue;
      if (entry.isDirectory()) walk(candidate);
      else if (entry.isFile() && entry.name === name) found.push(candidate);
    }
  };
  walk(root);
  return found;
}

describe('CSO native Windows build contract', () => {
  test('Windows builds use MSVC with a static CRT and no Bun-hosted public launcher', () => {
    const build = fs.readFileSync(path.join(ROOT, 'scripts/build-cso.sh'), 'utf8');
    const msvc = fs.readFileSync(path.join(ROOT, 'scripts/build-cso-windows.ps1'), 'utf8');
    expect(build).toContain('powershell.exe -NoProfile -NonInteractive');
    expect(build).toContain('build-cso-windows.ps1');
    expect(build).toContain('-OutputPath "$(cygpath -w "$CSO_STAGE_LAUNCHER")"');
    expect(build).toContain('-LockOutputPath "$(cygpath -w "$CSO_STAGE_LOCKER")"');
    expect(build).toContain('-CoreSha256 "$CSO_CORE_SHA256"');
    expect(build).toContain('-GitExePath "$(cygpath -aw "$CSO_WINDOWS_GIT")"');
    expect(build).toContain('CSO_PUBLISH_SHELL="$(cygpath -aw /usr/bin/bash.exe)"');
    expect(build).not.toContain('launcher-windows.ts');
    expect(fs.existsSync(path.join(ROOT, 'lib/cso/launcher-windows.ts'))).toBe(false);
    expect(msvc).toContain('Launch-VsDevShell.ps1');
    expect(msvc).toContain('[switch]$CheckOnly');
    expect(msvc).toContain('Normal CSO Windows builds require staged outputs and a lowercase SHA-256 core binding.');
    expect(msvc).toContain("[System.IO.FileAttributes]::ReparsePoint");
    expect(msvc).not.toContain("Join-Path $RepoRoot 'bin\\gstack-cso-launcher.exe'");
    expect(msvc).toContain("Set-Content -LiteralPath $source");
    expect(msvc).toContain('-Arch amd64 -HostArch amd64 -SkipAutomaticLocation');
    expect(msvc).toContain('StartsWith($installationPrefix');
    expect(msvc).toContain('/MT');
    expect(msvc).toContain('/W4 /WX');
    expect(msvc).toContain('GSTACK_CSO_CORE_SHA256');
    expect(msvc).toContain('GSTACK_CSO_GIT_PATH');
    expect(msvc).toContain('/FI$binding');
    expect(msvc).toContain('if ($LASTEXITCODE -ne 0)');
    const processSource=fs.readFileSync(path.join(ROOT,'lib','cso','process.ts'),'utf8');
    expect(processSource).toContain("includeNullPath=process.platform==='win32'?'/dev/null':nullPath");
    const launcherSource = fs.readFileSync(path.join(ROOT, 'lib/cso/launcher-windows.c'), 'utf8');
    expect(launcherSource).toContain('.gstack-cso-generation.lock');
    expect(launcherSource).toContain('.gstack-cso-generation');
    expect(launcherSource).toContain('GSTACK_CSO_CORE_SHA256');
    expect(launcherSource).toContain('BCryptOpenAlgorithmProvider');
    expect(launcherSource).toContain('MS_PRIMITIVE_PROVIDER');
    expect(launcherSource).toContain('sha256_handle(pinned_core');
    expect(launcherSource).toContain('#pragma comment(lib, "bcrypt.lib")');
    expect(launcherSource).toContain('PROC_THREAD_ATTRIBUTE_HANDLE_LIST');
    expect(launcherSource).toContain('joined_path');
    const childWait = launcherSource.indexOf('WaitForSingleObject(child.hProcess, INFINITE)');
    expect(childWait).toBeGreaterThan(0);
    expect(launcherSource.lastIndexOf('CloseHandle(pinned_core)')).toBeGreaterThan(childWait);
    expect(launcherSource.lastIndexOf('CloseHandle(generation_gate)')).toBeGreaterThan(childWait);
    const publisherSource = fs.readFileSync(path.join(ROOT, 'lib/cso/publish-lock.c'), 'utf8');
    expect(publisherSource).toContain('joined_path');
    expect(publisherSource).toContain('GENERIC_READ | GENERIC_WRITE, 0');
  });

  test('Windows CI runs the actual launcher tests rather than marking the platform supported from a source check', () => {
    const workflow = Bun.YAML.parse(fs.readFileSync(path.join(ROOT, '.github/workflows/free-tests.yml'), 'utf8')) as any;
    const job = workflow.jobs['cso-windows-launcher'];
    expect(job['runs-on']).toBe('windows-latest');
    expect(job.steps.some((s: any) => s.run === 'bun run build:cso' && s.shell === 'bash')).toBe(true);
    const smoke = job.steps.find((s: any) => s.run === 'bun run test:cso:windows');
    expect(smoke.env.GSTACK_CSO_WINDOWS_TESTS).toBe('1');
    expect(smoke['continue-on-error']).not.toBe(true);
  });

  // Each PowerShell invocation has its own deadline. A serial loop placed all
  // five cold starts under Bun's default five-second timeout.
  const pathEscapeCases = [
    ['launcher outside stage', (stage: string, outside: string) => [path.join(outside, 'gstack-cso-launcher.exe'), path.join(stage, 'gstack-cso-publish-lock.exe')]],
    ['launcher in stage parent', (stage: string) => [path.join(stage, '..', 'gstack-cso-launcher.exe'), path.join(stage, 'gstack-cso-publish-lock.exe')]],
    ['wrong launcher name', (stage: string) => [path.join(stage, 'wrong.exe'), path.join(stage, 'gstack-cso-publish-lock.exe')]],
    ['lock outside stage', (stage: string, outside: string) => [path.join(stage, 'gstack-cso-launcher.exe'), path.join(outside, 'gstack-cso-publish-lock.exe')]],
    ['wrong lock name', (stage: string) => [path.join(stage, 'gstack-cso-launcher.exe'), path.join(stage, 'wrong-lock.exe')]],
  ] as const;
  test.skipIf(!windows).each(pathEscapeCases)('Windows build rejects %s before invoking MSVC',(_name, outputs)=>{
    const script=path.join(ROOT,'scripts/build-cso-windows.ps1'),outside=fs.mkdtempSync(path.join(os.tmpdir(),'cso-bin-evil-'));
    const stage=fs.mkdtempSync(path.join(ROOT,'bin','.gstack-cso-stage.path-test.'));
    const [output,lock]=outputs(stage,outside),digest='a'.repeat(64);
    try{
      const result=spawnSync('powershell.exe',['-NoProfile','-NonInteractive','-ExecutionPolicy','Bypass','-File',script,'-RepoRoot',ROOT,'-OutputPath',output,'-LockOutputPath',lock,'-CoreSha256',digest,'-GitExePath',Bun.which('git')!],{encoding:'utf8',timeout:30_000});
      expect(result.error).toBeUndefined();expect(result.signal).toBeNull();expect(result.status).not.toBeNull();
      expect(result.status).not.toBe(0);expect(`${result.stdout}${result.stderr}`).toContain('direct, non-reparse staging directory');
    }finally{fs.rmSync(stage,{recursive:true,force:true});fs.rmSync(outside,{recursive:true,force:true});}
  },35_000);
});

(windows ? describe : describe.skip)('CSO native Windows startup', () => {
  test('BUN_OPTIONS cannot execute a preload before the environment is scrubbed', () => {
    const result = launch(['--version'], { BUN_OPTIONS: `--preload=${preload}` });
    expect(result.status).toBe(0);
    expect(fs.existsSync(marker)).toBe(false);
    const value = JSON.parse(result.stdout);
    expect(value.argv).toEqual(['--version']);
    expect(value.env.BUN_OPTIONS).toBeUndefined();
    expect(value.env.GSTACK_CSO_SECRET_CANARY).toBeUndefined();
    expect(value.env.NODE_OPTIONS).toBeUndefined();
    expect(value.env.GSTACK_HOME).toBe(path.join(temporary, 'state'));
    expect(value.env.PATH).not.toBe(temporary);
    expect(value.env.SystemRoot.toLowerCase()).toBe(process.env.SystemRoot!.toLowerCase());
    expect(pathIdentity(value.cwd)).toEqual(pathIdentity(temporary));
    expect(pathIdentity(value.cwd)).not.toEqual(pathIdentity(invocationCwd));
  });

  test('BUN_BE_BUN cannot turn the public command into the Bun runtime', () => {
    const result = launch(['--version'], { BUN_BE_BUN: '1' });
    expect(result.status).toBe(0);
    const value = JSON.parse(result.stdout);
    expect(value.argv).toEqual(['--version']);
    expect(value.env.BUN_BE_BUN).toBeUndefined();
  });

  test('preserves Unicode, empty, quoted, trailing-backslash and shell-looking arguments', () => {
    const args = ['', '空間', 'with spaces', 'a"b', 'C:\\directory with spaces\\', '\\"', '& whoami', '%PATH%', 'line\nbreak'];
    const result = launch(args);
    expect(result.status).toBe(0);
    expect(JSON.parse(result.stdout).argv).toEqual(args);
  });

  test('forwards child exit status and fails closed on oversized inherited input', () => {
    expect(launch(['--exit-23']).status).toBe(23);
    const result = launch([], { GSTACK_HOME: 'x'.repeat(8193) });
    expect(result.status).toBe(69);
    expect(result.stdout).toBe('');
    expect(result.stderr).toContain('environment input is too large');
  });

  test('resolves launcher installation aliases before locating its sibling core', () => {
    const alias = path.join(temporary, 'alias');
    fs.symlinkSync(temporary, alias, 'junction');
    const result = launch(['--version'], {}, path.join(alias, 'gstack-cso-launcher.exe'));
    expect(result.status).toBe(0);
    expect(JSON.parse(result.stdout).argv).toEqual(['--version']);
    fs.unlinkSync(alias);
  });

  test('rejects a launcher/manifest generation mismatch before executing the core', () => {
    const mismatched = path.join(temporary, 'mismatched generation');
    fs.mkdirSync(mismatched);
    fs.copyFileSync(launcher, path.join(mismatched, 'gstack-cso-launcher.exe'));
    fs.copyFileSync(core, path.join(mismatched, 'gstack-cso-core.exe'));
    fs.writeFileSync(path.join(mismatched, '.gstack-cso-generation.lock'), '');
    fs.writeFileSync(path.join(mismatched, '.gstack-cso-generation'), `${'0'.repeat(64)}\n`);
    const result = launch(['--version'], {}, path.join(mismatched, 'gstack-cso-launcher.exe'));
    expect(result.status).toBe(69);
    expect(result.stdout).toBe('');
    expect(result.stderr).toContain('generations do not match');
  });

  test('rejects changed core bytes even when the generation manifest is unchanged', () => {
    const tampered = path.join(temporary, 'tampered core');
    fs.mkdirSync(tampered);
    const tamperedLauncher = path.join(tampered, 'gstack-cso-launcher.exe');
    const tamperedCore = path.join(tampered, 'gstack-cso-core.exe');
    fs.copyFileSync(launcher, tamperedLauncher);
    fs.copyFileSync(core, tamperedCore);
    fs.appendFileSync(tamperedCore, Buffer.from([0]));
    fs.writeFileSync(path.join(tampered, '.gstack-cso-generation.lock'), '');
    fs.copyFileSync(path.join(temporary, '.gstack-cso-generation'), path.join(tampered, '.gstack-cso-generation'));
    const result = launch(['--version'], {}, tamperedLauncher);
    expect(result.status).toBe(69);
    expect(result.stdout).toBe('');
    expect(result.stderr).toContain('digest does not match');
  });

  test('the inherited generation gate survives launcher termination until the core exits', async () => {
    const ready = path.join(temporary, 'held-core.ready'), release = path.join(temporary, 'held-core.release'), exited = path.join(temporary, 'held-core.exited');
    const running = spawn(launcher, ['--hold-until', ready, release, exited], { cwd: invocationCwd, env: launchEnvironment(), stdio: 'ignore' });
    try {
      await waitForFile(ready);
      const launcherExited = new Promise<void>(resolveExit => running.once('exit', () => resolveExit()));
      running.kill('SIGKILL');
      await launcherExited;
      expect(publishProbe().status).toBe(73);
      fs.writeFileSync(release, 'release');
      const deadline = Date.now() + 10_000; let result = publishProbe();
      while (result.status === 73 && Date.now() < deadline) { await Bun.sleep(20); result = publishProbe(); }
      expect(result.status).toBe(0);
    } finally {
      fs.writeFileSync(release, 'release');
      if (!running.killed) running.kill('SIGKILL');
      const deadline = Date.now() + 5_000;
      while (!fs.existsSync(exited) && Date.now() < deadline) await Bun.sleep(10);
    }
  }, 30_000);

  test('a missing core never falls back to a PATH executable or Bun', () => {
    const missing = path.join(temporary, 'missing core');
    fs.mkdirSync(missing);
    const copy = path.join(missing, 'gstack-cso-launcher.exe');
    fs.copyFileSync(launcher, copy);
    fs.writeFileSync(path.join(missing, '.gstack-cso-generation.lock'), '');
    fs.copyFileSync(path.join(temporary, '.gstack-cso-generation'), path.join(missing, '.gstack-cso-generation'));
    const result = launch(['--version'], {}, copy);
    expect(result.status).toBe(69);
    expect(result.stdout).toBe('');
    expect(result.stderr).toContain('trusted compiled helper is missing');
  });

  test('the actual helper finds trusted Git and stores state under USERPROFILE without HOME', () => {
    const repository=path.join(temporary,'actual repository'),profile=path.join(temporary,'profile');
    fs.mkdirSync(repository);fs.mkdirSync(profile);
    const git='C:\\Program Files\\Git\\cmd\\git.exe',gitEnv={...process.env,HOME:profile};
    for(const args of [['init','-q'],['config','user.email','fixture@example.test'],['config','user.name','Fixture']] as string[][]){const result=spawnSync(git,args,{cwd:repository,encoding:'utf8',env:gitEnv,timeout:10_000});expect(result.status).toBe(0);}
    fs.writeFileSync(path.join(repository,'app.js'),'console.log("safe")\n');
    for(const args of [['add','app.js'],['commit','-qm','fixture']] as string[][]){const result=spawnSync(git,args,{cwd:repository,encoding:'utf8',env:gitEnv,timeout:10_000});expect(result.status).toBe(0);}
    const actual=path.join(ROOT,'bin','gstack-cso-launcher.exe'),env={...process.env,HOME:'',GSTACK_HOME:'',CLAUDE_PLUGIN_ROOT:'',CLAUDE_PLUGIN_DATA:'',USERPROFILE:profile,PATH:temporary,NODE_OPTIONS:'--require=hostile'};
    const doctor=spawnSync(actual,['doctor','--repo',repository],{cwd:repository,encoding:'utf8',env,timeout:30_000});expect(doctor.status).toBe(0);expect(JSON.parse(doctor.stdout).downloads).toBe(false);
    const started=spawnSync(actual,['start','--repo',repository,'--offline'],{cwd:repository,encoding:'utf8',env,timeout:30_000});expectSuccessfulProcess(started,'gstack-cso start');expect(JSON.parse(started.stdout).schemaVersion).toBe(3);expect(fs.existsSync(path.join(profile,'.gstack','security','cso'))).toBe(true);
  }, 120_000);

  test('NTFS high file IDs survive repeated native commands and ambiguous old decisions remain blocked', () => {
    const repository=path.join(temporary,'lease lifecycle repository'),profile=path.join(temporary,'lease lifecycle profile');
    fs.mkdirSync(repository);fs.mkdirSync(profile);
    const git='C:\\Program Files\\Git\\cmd\\git.exe',gitEnv={...process.env,HOME:profile};
    for(const args of [['init','-q'],['config','user.email','fixture@example.test'],['config','user.name','Fixture']] as string[][]){const result=spawnSync(git,args,{cwd:repository,encoding:'utf8',env:gitEnv,timeout:10_000});expect(result.status).toBe(0);}
    fs.writeFileSync(path.join(repository,'app.js'),'console.log("fixture")\n');
    for(const args of [['add','app.js'],['commit','-qm','fixture']] as string[][]){const result=spawnSync(git,args,{cwd:repository,encoding:'utf8',env:gitEnv,timeout:10_000});expect(result.status).toBe(0);}
    const actual=path.join(ROOT,'bin','gstack-cso-launcher.exe'),env={...process.env,HOME:'',GSTACK_HOME:'',CLAUDE_PLUGIN_ROOT:'',CLAUDE_PLUGIN_DATA:'',USERPROFILE:profile,PATH:temporary};
    const command=(args:string[])=>spawnSync(actual,args,{cwd:repository,encoding:'utf8',env,timeout:30_000}),submission=path.join(profile,'submission.json');
    fs.writeFileSync(submission,'{}\n');
    for(let i=0;i<3;i++){
      const started=command(['start','--repo',repository,'--offline']);expectSuccessfulProcess(started,'gstack-cso start');
      const run=JSON.parse(started.stdout),dir=path.join(profile,'.gstack','security','cso',run.repoId,run.runId),leases=path.join(dir,'.mutation-lock-leases');
      const initialized=command(['resume',run.runId]);expectSuccessfulProcess(initialized,'gstack-cso initialize mutation lease');
      expect(fs.realpathSync(leases).startsWith(fs.realpathSync(profile)+path.sep)).toBe(true);
      if(i===0){
        const churn=path.join(leases,'churn');let inode=0n;
        for(let attempt=0;attempt<1024;attempt++){
          fs.writeFileSync(churn,'x');inode=fs.lstatSync(churn,{bigint:true}).ino;fs.unlinkSync(churn);
          if(inode>BigInt(Number.MAX_SAFE_INTEGER))break;
        }
        expect(inode).toBeGreaterThan(BigInt(Number.MAX_SAFE_INTEGER));
      }
      const inspected=command(['inspect',run.runId]);expectSuccessfulProcess(inspected,'gstack-cso inspect');
      expect(JSON.parse(inspected.stdout).report.status).toBe('running');
      const read=command(['read',run.runId,'app.js']);expectSuccessfulProcess(read,'gstack-cso read');expect(read.stdout).toContain('fixture');
      const history=command(['history',run.runId]);expectSuccessfulProcess(history,'gstack-cso history');
      const submitted=command(['submit',run.runId,submission]);expectSuccessfulProcess(submitted,'gstack-cso submit');
      const resumed=command(['resume',run.runId]);expectSuccessfulProcess(resumed,'gstack-cso resume');
      const finished=command(['finish',run.runId]);expectSuccessfulProcess(finished,'gstack-cso finish');
      expect(JSON.parse(finished.stdout).completeness).not.toBe('complete');
      const report=JSON.parse(fs.readFileSync(path.join(dir,'report.json'),'utf8'));
      expect(report.coverage.some((entry:any)=>entry.status==='not_assessed')).toBe(true);
      expect(fs.readdirSync(leases)).toEqual([]);
      if(i!==2)continue;
      const token='d'.repeat(32),candidate=path.join(leases,`${token}.json`),decision=path.join(leases,`${token}.decision`);
      for(const rounded of [false,true]){
        let selected:string|undefined;
        for(let batch=0;batch<16&&!selected;batch++){
          const paths:string[]=[];
          for(let index=0;index<64;index++){
            const file=path.join(leases,`fixture-${batch}-${index}`);
            fs.writeFileSync(file,JSON.stringify({pid:2147483647,token,createdAt:0})+'\n');paths.push(file);
            const inode=fs.lstatSync(file,{bigint:true}).ino;
            if(!selected&&inode>BigInt(Number.MAX_SAFE_INTEGER)&&String(Number(inode))!==String(inode))selected=file;
          }
          for(const file of paths){if(file===selected)fs.renameSync(file,candidate);else fs.unlinkSync(file);}
        }
        expect(selected).toBeDefined();
        const stat=fs.lstatSync(candidate,{bigint:true}),record={schemaVersion:1,token,kind:'ticket',ticket:'0000000000000001',candidateDev:String(stat.dev),candidateIno:rounded?String(Number(stat.ino)):String(stat.ino),ownerPid:2147483647,ownerCreatedAt:0,publisherPid:2147483647,createdAt:0};
        fs.writeFileSync(decision,JSON.stringify(record)+'\n');
        const result=command(['resume',run.runId]);expect(result.status).not.toBe(0);
        if(rounded){
          expect(record.candidateIno).not.toBe(String(stat.ino));expect(result.stderr).toContain('UNSAFE_PATH');
          expect(fs.existsSync(candidate)).toBe(true);expect(fs.existsSync(decision)).toBe(true);
          fs.unlinkSync(decision);fs.unlinkSync(candidate);
        }else{
          expect(result.stderr).toContain('INVALID_SCHEMA');
          expect(fs.existsSync(candidate)).toBe(false);expect(fs.existsSync(decision)).toBe(false);
        }
      }
      const next=command(['start','--repo',repository,'--offline']);expectSuccessfulProcess(next,'gstack-cso start after legacy state');
      expect(JSON.parse(next.stdout).runId).not.toBe(run.runId);
    }
  }, 180_000);

  test('the actual helper rejects source mutation during snapshot capture without certifying a report', async () => {
    const repository=path.join(temporary,'racing repository'),profile=path.join(temporary,'race profile'),padding=path.join(repository,'padding'),target=path.join(repository,'zzzz-race-target.js');
    fs.mkdirSync(repository);fs.mkdirSync(profile);fs.mkdirSync(padding);
    const git='C:\\Program Files\\Git\\cmd\\git.exe',gitEnv={...process.env,HOME:profile};
    for(const args of [['init','-q'],['config','user.email','fixture@example.test'],['config','user.name','Fixture']] as string[][]){const result=spawnSync(git,args,{cwd:repository,encoding:'utf8',env:gitEnv,timeout:10_000});expect(result.status).toBe(0);}
    const sourceBytes=128*1024,stable=Buffer.alloc(sourceBytes,0x61),changed=Buffer.alloc(sourceBytes,0x62);
    fs.writeFileSync(target,stable);
    for(let index=0;index<192;index++)fs.writeFileSync(path.join(padding,`${String(index).padStart(4,'0')}.js`),stable);
    for(const args of [['add',path.basename(target)],['commit','-qm','fixture']] as string[][]){const result=spawnSync(git,args,{cwd:repository,encoding:'utf8',env:gitEnv,timeout:30_000});expect(result.status).toBe(0);}

    const actual=path.join(ROOT,'bin','gstack-cso-launcher.exe'),env={...process.env,HOME:'',GSTACK_HOME:'',CLAUDE_PLUGIN_ROOT:'',CLAUDE_PLUGIN_DATA:'',USERPROFILE:profile,PATH:temporary},state=path.join(profile,'.gstack','security','cso');
    const child=spawn(actual,['start','--repo',repository,'--offline'],{cwd:repository,env,stdio:['ignore','pipe','pipe']});
    let stdout='',stderr='',closed=false;
    child.stdout.on('data',chunk=>{stdout=(stdout+String(chunk)).slice(-8192);});
    child.stderr.on('data',chunk=>{stderr=(stderr+String(chunk)).slice(-8192);});
    const terminal=new Promise<{code:number|null;error?:string}>(resolve=>{
      child.once('error',error=>{closed=true;resolve({code:null,error:error.message});});
      child.once('close',code=>{closed=true;resolve({code});});
    });
    const markerDeadline=Date.now()+30_000;let mutations=0,outcome:{code:number|null;error?:string}|undefined;
    try{
      while(!closed&&!filesNamed(state,'history-status.json').length&&Date.now()<markerDeadline)await Bun.sleep(2);
      if(!filesNamed(state,'history-status.json').length)throw new Error('gstack-cso exited or timed out before reaching the bounded snapshot mutation point');
      while(!closed&&Date.now()<markerDeadline+15_000){
        try{fs.writeFileSync(target,changed);mutations++;}catch(error:any){if(!['EBUSY','EACCES','EPERM'].includes(error?.code))throw error;}
        await Bun.sleep(1);
      }
      if(!closed)throw new Error('gstack-cso did not finish after the injected snapshot mutation');
      outcome=await terminal;
    }finally{
      if(!closed){spawnSync('taskkill',['/PID',String(child.pid),'/T','/F'],{encoding:'utf8',timeout:10_000});await Promise.race([terminal,Bun.sleep(10_000)]);}
    }
    expect(mutations).toBeGreaterThan(0);
    expect(outcome?.error).toBeUndefined();
    expect(outcome?.code).not.toBe(0);
    expect(stderr).toContain('SNAPSHOT_RACE');
    expect(stdout).toBe('');
    expect(filesNamed(state,'snapshot.json')).toEqual([]);
    expect(filesNamed(state,'report.json')).toEqual([]);
  }, 90_000);
});