diff --git a/README.md b/README.md
index c8a1009..938e6e1 100755
--- a/README.md
+++ b/README.md
@@ -34,7 +34,7 @@ Three things set it apart:
 2. **Keyless.** The AI coding agent already on your machine is the backbone. No API keys, no second bill, no gatekeeper.
 3. **Honest about scope.** The [status table](#what-ships-today) marks exactly what's stable, experimental, or roadmap — because red-teaming shouldn't be a priesthood, and it damn sure shouldn't run on vibes.
 
-**Jump to** → [Quick start](#quick-start) · [What it hunts](#what-it-hunts) · [What ships today](#what-ships-today) · [Benchmarks](#benchmarks) · [Architecture](#architecture) · [Docs](#documentation)
+**Jump to** → [Quick start](#quick-start) · [Updating](#updating-from-upstream) · [What it hunts](#what-it-hunts) · [What ships today](#what-ships-today) · [Benchmarks](#benchmarks) · [Architecture](#architecture) · [Docs](#documentation)
 
 ## ⚠️ Authorized use only
 
@@ -101,6 +101,60 @@ npm run verify-claims             # re-derives every headline from committed JSO
 
 Library/SDK usage, the full HTTP API, and MCP setup live in [docs/](docs/).
 
+## Updating from upstream
+
+If you installed from a release tarball or copied the tree instead of tracking `git pull`, use the built-in updater to sync with [github.com/elder-plinius/T3MP3ST](https://github.com/elder-plinius/T3MP3ST) without losing local secrets or bench output. It shows a numbered plan, asks **y/N** before changing anything, then runs `npm install`.
+
+```bash
+npm run update          # interactive sync from upstream main
+npm run update:dry      # preview only — no git or npm changes
+npm run update:hard     # hard reset to upstream/main (still restores protected paths)
+```
+
+Works on Windows (PowerShell), macOS, Linux, and WSL. Requires **git** and **npm** on your PATH.
+
+### Safety modes
+
+The updater is destructive **only when explicitly requested**:
+
+| Command | What it does | Local changes |
+|---|---|---|
+| `npm run update` | Default interactive sync | `git merge upstream/main`; protected paths backed up and restored |
+| `npm run update:dry` | Read-only preview | No git init, fetch, merge, reset, or `npm install`; safe on tarball installs |
+| `npm run update:hard` | Opt-in hard reset | `git reset --hard upstream/main`; protected paths still restored |
+
+All non-dry-run modes ask **y/N** before changing anything. Pass `--force` only in trusted automation. On the first-time path (no commits yet), the updater replaces the working tree with the upstream snapshot, but protected paths are backed up first and restored afterward.
+
+### Protected paths (inside the repo)
+
+Before replacing files, the updater backs up anything on disk that matches [`scripts/update-protected.txt`](scripts/update-protected.txt), then restores it after sync. **Only paths that exist locally are affected** — if you never created them, nothing happens.
+
+| Path | Why it's protected |
+|---|---|
+| `.env`, `.env.*` | API keys and local env overrides. `!.env.example` is an exception — the template is **not** protected so upstream can update it. |
+| `.keys.local` | One-off key paste file loaded by bench scripts (e.g. `VENICE_API_KEY`) without touching `.env`. |
+| `.keys.bounty.json` | HackerOne / Bugcrowd / similar platform credentials. |
+| `bench/cybench/corpus-stage/` | Large cloned Cybench corpus (not redistributed; expensive to re-download). |
+| `bench/cybench/service-stage/`, `bench/cybench/challenges/` | Per-run Cybench Docker staging and challenge trees (regenerable, but slow to rebuild). |
+| `bench/xbow/stage/`, `bench/xbow/challenges/` | XBOW/XBEN challenge staging (large third-party trees). |
+| `bench/wild-hunt/` | Cold-hunt findings, PoCs, disclosure drafts, and campaign results — pre-coordination vuln material. |
+| `bench/decomposition-results/` | White-box decomposition run JSON (may contain unreported analysis). |
+| `bench/refusal-frontier/` | Refusal-boundary probe artifacts (raw model responses). |
+| `bench/nyu/` | Staged NYU CTF content from `nyu-prep.mjs`. |
+| `docs/disclosures/` | Generated vendor disclosure packages (`disclosure-gen` output). |
+| `reports/` | Engagement and hunt reports (persistent output; same tree as Docker volume mounts in deployment setups). |
+| `evidence/` | PoCs, screenshots, and other finding evidence kept across updates. |
+
+Add your own patterns in `scripts/update-protected.local.txt` (optional local overlay; same glob syntax as the main manifest).
+
+### Never touched (outside the repo)
+
+These live outside the project tree — an update never reads or writes them:
+
+- `%APPDATA%\t3mp3st-nodejs\Config\config.json` (or the macOS/Linux `conf` store path) — saved by `npm run setup`
+- War Room browser **localStorage** on the War Room origin
+- Local agent auth (`~/.codex`, `%LOCALAPPDATA%\hermes`, etc.)
+
 ## What ships today
 
 The framework is an 8-operator kill chain, and this table won't blow smoke about it. **Recon is a live, tool-backed engine** — and the teeth are already real: 90.1% pass@1 on XBEN, 8/10 held-out post-cutoff CVEs pinned to exact file/line/CWE, and a coordinated-disclosure pipeline that's live enough to have drafts held for vendor coordination right now. What's *not* proven is the swarm. Each downstream operator — Exploiter, Infiltrator, Exfiltrator, Ghost — runs the **same real, tool-backed ReAct loop as recon** (real exploit tools, not stubs), but the headline numbers came from a single agent, not the coordinated 8-operator cell, and end-to-end swarm exploitation is unbenchmarked and still unreliable. The engine is real; the swarm is the part still earning its stripes. Loud where we've earned it, blunt about the rest.
diff --git a/package.json b/package.json
index f039b7b..05ecf53 100755
--- a/package.json
+++ b/package.json
@@ -79,7 +79,11 @@
     "smoke:live": "node scripts/smoke.mjs --live",
     "capability": "node scripts/capability-smoke.mjs",
     "gauntlet": "node scripts/capability-smoke.mjs --gauntlet",
-    "test:gate": "npm run build --silent && node scripts/test-gate.mjs"
+    "test:gate": "npm run build --silent && node scripts/test-gate.mjs",
+    "update": "node scripts/update.mjs",
+    "update:dry": "node scripts/update.mjs --dry-run",
+    "update:hard": "node scripts/update.mjs --hard",
+    "test:update": "node scripts/test-update.mjs"
   },
   "bin": {
     "tempest": "./dist/cli.js",
diff --git a/scripts/test-update.mjs b/scripts/test-update.mjs
new file mode 100644
index 0000000..0037c20
--- /dev/null
+++ b/scripts/test-update.mjs
@@ -0,0 +1,371 @@
+#!/usr/bin/env node
+/**
+ * Integration tests for the T3MP3ST updater.
+ * Each test runs the updater in a temporary sandbox repo so real repository state
+ * is never touched.
+ */
+import { execSync, spawnSync } from 'node:child_process';
+import { existsSync, mkdirSync, readFileSync, rmSync, writeFileSync } from 'node:fs';
+import { dirname, join } from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { platform, tmpdir } from 'node:os';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+
+const isWin = platform() === 'win32';
+
+let pass = 0;
+let fail = 0;
+const tests = [];
+
+function test(name, fn) {
+  tests.push({ name, fn });
+}
+
+function assert(cond, msg) {
+  if (!cond) {
+    throw new Error(msg || 'assertion failed');
+  }
+}
+
+function ok(label) {
+  pass++;
+  console.log('  OK ' + label);
+}
+
+function logFail(label, err) {
+  fail++;
+  console.log('  FAIL ' + label + ': ' + err.message);
+}
+
+function stripAnsi(s) {
+  return s.replace(/\x1b\[[0-9;]*m/g, '');
+}
+
+function psAvailable() {
+  return spawnSync('powershell', ['-NoProfile', '-Command', 'exit 0'], { stdio: 'pipe' }).status === 0;
+}
+
+function bashAvailable() {
+  return !!bashExe();
+}
+
+// On Windows, the bash on PATH is often WSL (can't access Windows temp dirs).
+// Prefer Git Bash alongside git if available. Returns null if not found.
+function bashExe() {
+  if (!isWin) {
+    const r = spawnSync('bash', ['-c', 'exit 0'], { stdio: 'pipe' });
+    return r.status === 0 ? 'bash' : null;
+  }
+  const result = spawnSync('where', ['git'], { shell: true, stdio: 'pipe', encoding: 'utf8' });
+  if (result.status !== 0 || !result.stdout.trim()) return null;
+  const gitPath = result.stdout.trim().split(/\r?\n/)[0];
+  const dir = dirname(gitPath);
+  const candidates = [join(dir, 'bin', 'bash.exe'), join(dir, '..', 'bin', 'bash.exe')];
+  for (const c of candidates) {
+    if (existsSync(c)) {
+      const r = spawnSync(c, ['-c', 'exit 0'], { stdio: 'pipe' });
+      if (r.status === 0) return c;
+    }
+  }
+  return null;
+}
+
+const _bash = bashExe();
+
+function cleanup(dir) {
+  for (let i = 0; i < 5; i++) {
+    try {
+      rmSync(dir, { recursive: true, force: true });
+      return;
+    } catch (err) {
+      if (i === 4) {
+        console.warn('  WARN could not clean up temp dir: ' + dir + ' (' + err.message + ')');
+        return;
+      }
+      Atomics.wait(new Int32Array(new SharedArrayBuffer(4)), 0, 0, 200);
+    }
+  }
+}
+
+function makeSandbox() {
+  const dir = join(tmpdir(), `t3mp3st-update-test-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`);
+  mkdirSync(dir, { recursive: true });
+  mkdirSync(join(dir, 'scripts'), { recursive: true });
+
+ const files = [
+   'update.ps1',
+   'update.sh',
+   'update-protected.txt',
+   'update-banner.txt',
+   'update.mjs',
+ ];
+ for (const f of files) {
+    let content = readFileSync(join(__dirname, f), 'utf8');
+    if (f === 'update.sh') {
+      content = content.replace(/\r\n/g, '\n');
+    }
+    writeFileSync(join(dir, 'scripts', f), content);
+  }
+
+  writeFileSync(join(dir, 'package.json'), JSON.stringify({ name: 't3mp3st-test-sandbox', version: '0.0.0' }, null, 2));
+  writeFileSync(join(dir, '.env'), 'SECRET=local-secret\n');
+  writeFileSync(join(dir, '.env.example'), 'SECRET=your-secret\n');
+  mkdirSync(join(dir, 'reports'), { recursive: true });
+  writeFileSync(join(dir, 'reports', 'engagement.md'), '# engagement\n');
+  mkdirSync(join(dir, 'evidence'), { recursive: true });
+  writeFileSync(join(dir, 'evidence', 'poc.txt'), 'poc\n');
+  writeFileSync(join(dir, 'unprotected.txt'), 'I should be replaced\n');
+
+  return dir;
+}
+
+function runPowerShell(sandbox, args = []) {
+  const ps1 = join(sandbox, 'scripts', 'update.ps1');
+  const result = spawnSync(
+    'powershell',
+    ['-NoProfile', '-ExecutionPolicy', 'Bypass', '-File', ps1, ...args],
+    { cwd: sandbox, stdio: 'pipe', encoding: 'utf8' }
+  );
+  return {
+    status: result.status,
+    stdout: stripAnsi(result.stdout || ''),
+    stderr: stripAnsi(result.stderr || ''),
+  };
+}
+
+function runBash(sandbox, args = []) {
+  const sh = 'scripts/update.sh';
+  const result = spawnSync(_bash, [sh, ...args], { cwd: sandbox, stdio: 'pipe', encoding: 'utf8', shell: false });
+  return {
+    status: result.status,
+    stdout: stripAnsi(result.stdout || ''),
+    stderr: stripAnsi(result.stderr || ''),
+  };
+}
+
+function makeEmptySandbox() {
+  // Same as makeSandbox but with NO .env, reports/, or evidence/ -- exercises
+  // the zero-protected-path path that the reviewer flagged.
+  const dir = join(tmpdir(), `t3mp3st-update-test-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`);
+  mkdirSync(dir, { recursive: true });
+  mkdirSync(join(dir, 'scripts'), { recursive: true });
+  const files = ['update.ps1', 'update.sh', 'update-protected.txt', 'update-banner.txt', 'update.mjs'];
+  for (const f of files) {
+    let content = readFileSync(join(__dirname, f), 'utf8');
+    if (f === 'update.sh') {
+      content = content.replace(/\r\n/g, '\n');
+    }
+    writeFileSync(join(dir, 'scripts', f), content);
+  }
+  writeFileSync(join(dir, 'package.json'), JSON.stringify({ name: 't3mp3st-test-empty', version: '0.0.0' }, null, 2));
+  writeFileSync(join(dir, 'unprotected.txt'), 'I should be replaced\n');
+  return dir;
+}
+
+// ---------------------------------------------------------------------------
+// Static / source-level checks
+// ---------------------------------------------------------------------------
+
+test('protected manifest contains reports/ and evidence/', () => {
+  const manifest = readFileSync(join(__dirname, 'update-protected.txt'), 'utf8');
+  assert(manifest.includes('reports/'), 'reports/ missing from protected manifest');
+  assert(manifest.includes('evidence/'), 'evidence/ missing from protected manifest');
+  assert(manifest.includes('!.env.example'), '!.env.example missing from protected manifest');
+});
+
+test('update.mjs maps --dry-run and --hard', () => {
+  const src = readFileSync(join(__dirname, 'update.mjs'), 'utf8');
+  assert(src.includes("case '--dry-run'") && src.includes("return ['-DryRun']"), '--dry-run not mapped');
+  assert(src.includes("case '--hard'") && src.includes("return ['-Hard']"), '--hard not mapped');
+});
+
+test('update.ps1 has dry-run guards and hard reset opt-in', () => {
+  const ps1 = readFileSync(join(__dirname, 'update.ps1'), 'utf8');
+  assert(ps1.includes('if ($DryRun)'), 'PowerShell dry-run guard missing');
+  assert(ps1.includes('if ($Hard)'), 'PowerShell hard reset opt-in missing');
+  assert(ps1.includes('[System.IO.Path]::GetTempPath()'), 'PowerShell backup root must use a portable temp path');
+});
+
+test('update.sh has dry-run guard, negation and failure trap', () => {
+  const sh = readFileSync(join(__dirname, 'update.sh'), 'utf8');
+  assert(sh.indexOf('if [[ "$DRY_RUN" -eq 1 ]]') < sh.indexOf('git init'), 'bash dry-run guard not before git init');
+  assert(sh.includes('apply_negation_patterns'), 'bash negation support missing');
+  assert(sh.includes('trap on_err ERR'), 'bash failure trap missing');
+});
+
+// ---------------------------------------------------------------------------
+// PowerShell integration tests
+// ---------------------------------------------------------------------------
+
+if (psAvailable()) {
+  test('dry-run is read-only on tarball-like sandbox', () => {
+    const sb = makeSandbox();
+    try {
+      const out = runPowerShell(sb, ['-DryRun', '-Force']);
+      assert(out.status === 0, 'dry-run failed: ' + out.stderr + out.stdout);
+      assert(!existsSync(join(sb, '.git')), '.git should not be created in dry-run');
+      assert(readFileSync(join(sb, '.env'), 'utf8') === 'SECRET=local-secret\n', '.env should not be modified');
+      assert(out.stdout.includes('First-time sync (upstream snapshot)'), 'expected first-time strategy label');
+      assert(out.stdout.includes('reports/') || out.stdout.includes('reports'), 'reports/ should be listed as protected');
+      assert(out.stdout.includes('evidence/') || out.stdout.includes('evidence'), 'evidence/ should be listed as protected');
+      assert(!out.stdout.includes('.env.example'), '.env.example should NOT be listed as protected');
+    } finally {
+      cleanup(sb);
+    }
+  });
+
+  test('dry-run preserves dirty worktree changes in protected paths', () => {
+    const sb = makeSandbox();
+    try {
+      writeFileSync(join(sb, '.env'), 'SECRET=dirty-secret\n');
+      writeFileSync(join(sb, 'reports', 'engagement.md'), '# changed\n');
+      const out = runPowerShell(sb, ['-DryRun', '-Force']);
+      assert(out.status === 0, 'dry-run failed: ' + out.stderr + out.stdout);
+      assert(readFileSync(join(sb, '.env'), 'utf8') === 'SECRET=dirty-secret\n', 'dirty .env should survive dry-run');
+      assert(readFileSync(join(sb, 'reports', 'engagement.md'), 'utf8') === '# changed\n', 'dirty report should survive dry-run');
+    } finally {
+      cleanup(sb);
+    }
+  });
+
+  test('merge strategy shown when local repo has commits', () => {
+    const sb = makeSandbox();
+    try {
+      execSync('git init', { cwd: sb, stdio: 'pipe' });
+      execSync('git config user.email "test@test"', { cwd: sb, stdio: 'pipe' });
+      execSync('git config user.name "Test"', { cwd: sb, stdio: 'pipe' });
+      execSync('git add .', { cwd: sb, stdio: 'pipe' });
+      execSync('git commit -m initial', { cwd: sb, stdio: 'pipe' });
+      const out = runPowerShell(sb, ['-DryRun', '-Force']);
+      assert(out.status === 0, 'dry-run failed: ' + out.stderr + out.stdout);
+      assert(out.stdout.includes('Merge upstream/main'), 'expected merge strategy label');
+      assert(!out.stdout.includes('Hard reset'), 'should not show hard reset without -Hard');
+    } finally {
+      cleanup(sb);
+    }
+  });
+
+  test('hard reset strategy is opt-in', () => {
+    const sb = makeSandbox();
+    try {
+      const out = runPowerShell(sb, ['-DryRun', '-Hard', '-Force']);
+      assert(out.status === 0, 'dry-run failed: ' + out.stderr + out.stdout);
+      assert(out.stdout.includes('Hard reset to upstream/main'), 'expected hard reset strategy label');
+      assert(out.stdout.includes('git reset --hard'), 'expected git reset --hard in dry-run plan');
+      assert(!existsSync(join(sb, '.git')), '.git should not be created in dry-run');
+    } finally {
+      cleanup(sb);
+    }
+  });
+
+  test('non-dry run requires confirmation unless forced', () => {
+    const sb = makeSandbox();
+    try {
+      const result = spawnSync(
+        'powershell',
+        ['-NoProfile', '-ExecutionPolicy', 'Bypass', '-File', join(sb, 'scripts', 'update.ps1'), '-DryRun'],
+        { cwd: sb, stdio: ['pipe', 'pipe', 'pipe'], encoding: 'utf8', input: 'n\n' }
+      );
+      const out = stripAnsi((result.stdout || '') + (result.stderr || ''));
+      assert(out.includes('Cancelled') || out.includes('Cancelled - no changes made'), 'expected cancel message');
+      assert(!existsSync(join(sb, '.git')), '.git should not be created after cancellation');
+    } finally {
+      cleanup(sb);
+    }
+  });
+} else {
+  console.log('  SKIP PowerShell integration tests: powershell not available');
+}
+
+// ---------------------------------------------------------------------------
+// Bash integration tests
+// ---------------------------------------------------------------------------
+
+if (bashAvailable()) {
+  test('bash dry-run is read-only on tarball-like sandbox', () => {
+    const sb = makeSandbox();
+    try {
+      const out = runBash(sb, ['--dry-run', '--force']);
+      assert(out.status === 0, 'bash dry-run failed: ' + out.stderr + out.stdout);
+      assert(!existsSync(join(sb, '.git')), '.git should not be created in bash dry-run');
+      assert(readFileSync(join(sb, '.env'), 'utf8') === 'SECRET=local-secret\n', '.env should not be modified by bash dry-run');
+      assert(out.stdout.includes('Merge upstream') || out.stdout.includes('First-time sync'), 'expected strategy label in bash output');
+    } finally {
+      cleanup(sb);
+    }
+  });
+
+  test('bash hard reset is opt-in', () => {
+    const sb = makeSandbox();
+    try {
+      const out = runBash(sb, ['--dry-run', '--hard', '--force']);
+      assert(out.status === 0, 'bash dry-run failed: ' + out.stderr + out.stdout);
+      assert(out.stdout.includes('git reset --hard'), 'expected git reset --hard in bash dry-run plan');
+      assert(!existsSync(join(sb, '.git')), '.git should not be created in bash dry-run');
+    } finally {
+      cleanup(sb);
+    }
+  });
+
+  test('bash dry-run exits clean with no protected paths (no --force)', () => {
+    // Regression: grep -c on an empty file exits nonzero, so || echo 0 produced
+    // "0\n0" and broke [[ -eq ]] comparisons, tripping the ERR trap.
+    const sb = makeEmptySandbox();
+    try {
+      const result = spawnSync(_bash, ['scripts/update.sh', '--dry-run'], {
+        cwd: sb, stdio: ['pipe', 'pipe', 'pipe'], encoding: 'utf8', input: 'n\n',
+      });
+      const out = {
+        status: result.status,
+        stdout: stripAnsi(result.stdout || ''),
+        stderr: stripAnsi(result.stderr || ''),
+      };
+      assert(out.status === 0, 'bash dry-run with empty protected set should exit 0, got ' + out.status + '\n' + out.stdout + out.stderr);
+      assert(!out.stdout.includes('syntax error'), 'unexpected syntax error from broken protected_count:\n' + out.stdout);
+      assert(out.stdout.includes('No protected project files'), 'expected "No protected project files" message');
+      assert(out.stdout.includes('Cancelled'), 'expected cancel message when stdin declines');
+      assert(!existsSync(join(sb, '.git')), '.git should not be created in dry-run');
+    } finally {
+      cleanup(sb);
+    }
+  });
+
+  test('bash dry-run --force exits clean with no protected paths', () => {
+    const sb = makeEmptySandbox();
+    try {
+      const out = runBash(sb, ['--dry-run', '--force']);
+      assert(out.status === 0, 'bash dry-run --force with empty protected set should exit 0, got ' + out.status + '\n' + out.stdout + out.stderr);
+      assert(!out.stdout.includes('syntax error'), 'unexpected syntax error:\n' + out.stdout);
+      assert(out.stdout.includes('No protected project files'), 'expected "No protected project files" message');
+      assert(out.stdout.includes('Preview only'), 'expected dry-run preview completion message');
+      assert(!existsSync(join(sb, '.git')), '.git should not be created in dry-run');
+    } finally {
+      cleanup(sb);
+    }
+  });
+} else {
+  console.log('  SKIP Bash integration tests: bash not available');
+}
+
+// ---------------------------------------------------------------------------
+// Run all tests
+// ---------------------------------------------------------------------------
+
+console.log('');
+console.log('======== updater tests ========');
+console.log('');
+
+for (const t of tests) {
+  try {
+    t.fn();
+    ok(t.name);
+  } catch (err) {
+    logFail(t.name, err);
+  }
+}
+
+console.log('');
+console.log('======== ' + (fail === 0 ? 'ALL PASS' : fail + ' FAILED') + ' ========');
+console.log('');
+process.exit(fail === 0 ? 0 : 1);
diff --git a/scripts/update-banner.txt b/scripts/update-banner.txt
new file mode 100644
index 0000000..c4dc950
--- /dev/null
+++ b/scripts/update-banner.txt
@@ -0,0 +1,9 @@
+ ▄▄▄█████▓▓█████  ███▄ ▄███▓ ██▓███  ▓█████   ██████ ▄▄▄█████▓
+ ▓  ██▒ ▓▒▓█   ▀ ▓██▒▀█▀ ██▒▓██░  ██▒▓█   ▀ ▒██    ▒ ▓  ██▒ ▓▒
+ ▒ ▓██░ ▒░▒███   ▓██    ▓██░▓██░ ██▓▒▒███   ░ ▓██▄   ▒ ▓██░ ▒░
+ ░ ▓██▓ ░ ▒▓█  ▄ ▒██    ▒██ ▒██▄█▓▒ ▒▒▓█  ▄   ▒   ██▒░ ▓██▓ ░
+   ▒██▒ ░ ░▒████▒▒██▒   ░██▒▒██▒ ░  ░░▒████▒▒██████▒▒  ▒██▒ ░
+   ▒ ░░   ░░ ▒░ ░░ ▒░   ░  ░▒▓▒░ ░  ░░░ ▒░ ░▒ ▒▓▒ ▒ ░  ▒ ░░
+     ░     ░ ░  ░░  ░      ░░▒ ░      ░ ░  ░░ ░▒  ░ ░    ░
+   ░         ░   ░      ░   ░░          ░   ░  ░  ░    ░
+             ░  ░       ░               ░  ░      ░
diff --git a/scripts/update-protected.txt b/scripts/update-protected.txt
new file mode 100644
index 0000000..ff16c22
--- /dev/null
+++ b/scripts/update-protected.txt
@@ -0,0 +1,21 @@
+# Paths preserved across `npm run update` (repo-relative).
+# Lines starting with # are ignored. Glob * and ** supported.
+# Optional overlay: scripts/update-protected.local.txt
+
+.env
+.env.*
+!.env.example
+.keys.local
+.keys.bounty.json
+bench/cybench/corpus-stage/
+bench/cybench/service-stage/
+bench/cybench/challenges/
+bench/xbow/stage/
+bench/xbow/challenges/
+bench/wild-hunt/
+bench/decomposition-results/
+bench/refusal-frontier/
+bench/nyu/
+docs/disclosures/
+reports/
+evidence/
diff --git a/scripts/update.mjs b/scripts/update.mjs
new file mode 100644
index 0000000..923d026
--- /dev/null
+++ b/scripts/update.mjs
@@ -0,0 +1,141 @@
+#!/usr/bin/env node
+/**
+ * Cross-platform entry for `npm run update`.
+ * Windows  -> scripts/update.ps1
+ * Linux/macOS/WSL -> scripts/update.sh
+ */
+import { spawnSync } from 'node:child_process';
+import { existsSync } from 'node:fs';
+import { dirname, join } from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { platform } from 'node:os';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const root = join(__dirname, '..');
+const args = process.argv.slice(2);
+
+function commandExists(name) {
+  if (platform() === 'win32') {
+    const result = spawnSync('where', [name], { shell: true, stdio: 'pipe' });
+    return result.status === 0;
+  }
+  const result = spawnSync('command', ['-v', name], { shell: true, stdio: 'pipe' });
+  return result.status === 0;
+}
+
+function gitInstallHelp() {
+  const os = platform();
+  if (os === 'win32') {
+    return [
+      '[x] Git is required but was not found on PATH.',
+      '',
+      'Install Git for Windows:',
+      '  https://git-scm.com/download/win',
+      '',
+      'During setup, choose "Git from the command line and also from 3rd-party software".',
+      'Then reopen your terminal and run:  npm run update',
+    ].join('\n');
+  }
+  if (os === 'darwin') {
+    return [
+      '[x] Git is required but was not found on PATH.',
+      '',
+      'Install options:',
+      '  brew install git',
+      '  xcode-select --install',
+      '',
+      'Then run:  npm run update',
+    ].join('\n');
+  }
+  return [
+    '[x] Git is required but was not found on PATH.',
+    '',
+    'Install with your package manager, for example:',
+    '  sudo apt install git        # Debian/Ubuntu',
+    '  sudo dnf install git        # Fedora',
+    '  sudo pacman -S git          # Arch',
+    '',
+    'More: https://git-scm.com/download/linux',
+    '',
+    'Then run:  npm run update',
+  ].join('\n');
+}
+
+function npmInstallHelp() {
+  return [
+    '[x] npm is required but was not found on PATH.',
+    '',
+    'Install Node.js (includes npm): https://nodejs.org/',
+    'Then run:  npm run update',
+  ].join('\n');
+}
+
+function mapArgsForPowerShell(argv) {
+  return argv.flatMap((arg) => {
+    switch (arg) {
+      case '--dry-run':
+        return ['-DryRun'];
+      case '--hard':
+        return ['-Hard'];
+      case '--force':
+        return ['-Force'];
+      case '--keep-backup':
+        return ['-KeepBackup'];
+      default:
+        return [arg];
+    }
+  });
+}
+
+if (!existsSync(join(root, 'package.json'))) {
+  console.error(`[x] Not a T3MP3ST repo (package.json missing): ${root}`);
+  process.exit(1);
+}
+
+if (!commandExists('git')) {
+  console.error(gitInstallHelp());
+  process.exit(1);
+}
+
+if (!commandExists('npm')) {
+  console.error(npmInstallHelp());
+  process.exit(1);
+}
+
+const os = platform();
+const platformLabel = { win32: 'Windows', darwin: 'macOS', linux: 'Linux' }[os] ?? os;
+const scriptName = os === 'win32' ? 'update.ps1' : 'update.sh';
+console.log('\x1b[90m-- Launcher ----------------------------------------\x1b[0m');
+console.log(`  \x1b[36mPlatform\x1b[0m   ${platformLabel}`);
+console.log(`  \x1b[36mDriver\x1b[0m     scripts/${scriptName}`);
+console.log(`  \x1b[36mCommand\x1b[0m    npm run update`);
+console.log('');
+
+let result;
+
+if (os === 'win32') {
+  const ps1 = join(__dirname, 'update.ps1');
+  if (!existsSync(ps1)) {
+    console.error(`[x] Missing updater script: ${ps1}`);
+    process.exit(1);
+  }
+  result = spawnSync(
+    'powershell',
+    ['-NoProfile', '-ExecutionPolicy', 'Bypass', '-File', ps1, ...mapArgsForPowerShell(args)],
+    { cwd: root, stdio: 'inherit' },
+  );
+} else {
+  const sh = join(__dirname, 'update.sh');
+  if (!existsSync(sh)) {
+    console.error(`[x] Missing updater script: ${sh}`);
+    process.exit(1);
+  }
+  result = spawnSync('bash', [sh, ...args], { cwd: root, stdio: 'inherit' });
+}
+
+if (result.error) {
+  console.error(`[x] Failed to start updater: ${result.error.message}`);
+  process.exit(1);
+}
+
+process.exit(result.status ?? 1);
diff --git a/scripts/update.ps1 b/scripts/update.ps1
new file mode 100644
index 0000000..fc70036
--- /dev/null
+++ b/scripts/update.ps1
@@ -0,0 +1,716 @@
+#Requires -Version 5.1
+<#
+.SYNOPSIS
+  Safe upstream sync for T3MP3ST from elder-plinius/T3MP3ST.
+
+.DESCRIPTION
+  Backs up local secrets/config/artifacts, fetches upstream main, applies the update,
+  restores protected paths, then runs npm install.
+
+  Config outside this repo is never touched:
+    %APPDATA%\t3mp3st-nodejs\Config\config.json  (npm run setup wizard)
+    Browser localStorage "t3mp3st" on the War Room origin
+    Local agent auth (~/.codex, %LOCALAPPDATA%\hermes, etc.)
+
+.PARAMETER DryRun
+  Preview only; no git or npm changes.
+
+.PARAMETER Hard
+  git reset --hard upstream/main after fetch (source edits in repo are discarded;
+  protected files are still restored from backup).
+
+.PARAMETER Force
+  Skip the y/N confirmation prompt.
+
+.PARAMETER KeepBackup
+  Do not delete the temp backup folder after a successful run.
+#>
+[CmdletBinding()]
+param(
+    [switch]$DryRun,
+    [switch]$Hard,
+    [switch]$Force,
+    [switch]$KeepBackup
+)
+
+$ErrorActionPreference = 'Stop'
+
+$UpstreamUrl = 'https://github.com/elder-plinius/T3MP3ST.git'
+$UpstreamBranch = 'main'
+$UpstreamRemote = 'upstream'
+
+$RepoRoot = (Resolve-Path (Join-Path $PSScriptRoot '..')).Path
+Set-Location $RepoRoot
+
+function Get-TerminalColumns {
+    try {
+        if ($Host.UI -and $Host.UI.RawUI) {
+            $width = [int]$Host.UI.RawUI.WindowSize.Width
+            if ($width -gt 0) { return $width }
+        }
+    } catch { }
+    return 80
+}
+
+function Get-BannerCharDensity {
+    param([char]$Char)
+    $code = [int][char]$Char
+    switch ($code) {
+        0x2588 { return 5 } # █
+        0x2593 { return 4 } # ▓
+        0x2592 { return 3 } # ▒
+        0x2584 { return 3 } # ▄
+        0x2580 { return 3 } # ▀
+        0x2591 { return 2 } # ░
+        default { return 0 }
+    }
+}
+
+function Merge-BannerChars {
+    param([char]$Left, [char]$Right)
+    $leftDensity = Get-BannerCharDensity $Left
+    $rightDensity = Get-BannerCharDensity $Right
+    if ($leftDensity -ge $rightDensity) { return $Left }
+    return $Right
+}
+
+function Merge-BannerLines {
+    param([string]$Top, [string]$Bottom)
+    $length = [Math]::Max($Top.Length, $Bottom.Length)
+    $top = $Top.PadRight($length)
+    $bottom = $Bottom.PadRight($length)
+    $builder = New-Object System.Text.StringBuilder
+    for ($i = 0; $i -lt $length; $i++) {
+        [void]$builder.Append((Merge-BannerChars $top[$i] $bottom[$i]))
+    }
+    return $builder.ToString().TrimEnd()
+}
+
+function Scale-BannerLineHorizontal {
+    param([string]$Line)
+    if (-not $Line) { return '' }
+    $builder = New-Object System.Text.StringBuilder
+    for ($i = 0; $i -lt $Line.Length; $i += 2) {
+        $left = $Line[$i]
+        $right = if (($i + 1) -lt $Line.Length) { $Line[$i + 1] } else { ' ' }
+        [void]$builder.Append((Merge-BannerChars $left $right))
+    }
+    return $builder.ToString().TrimEnd()
+}
+
+function Scale-BannerLines {
+    param([string[]]$Lines)
+    $horizontal = foreach ($line in $Lines) {
+        if ($line) { Scale-BannerLineHorizontal $line } else { '' }
+    }
+    $vertical = New-Object System.Collections.Generic.List[string]
+    for ($i = 0; $i -lt $horizontal.Count; $i += 2) {
+        if (($i + 1) -lt $horizontal.Count) {
+            [void]$vertical.Add((Merge-BannerLines $horizontal[$i] $horizontal[$i + 1]))
+        } else {
+            [void]$vertical.Add($horizontal[$i])
+        }
+    }
+    return @($vertical.ToArray())
+}
+
+function Get-BannerMaxWidth {
+    param([string[]]$Lines)
+    $max = 0
+    foreach ($line in $Lines) {
+        if ($line.Length -gt $max) { $max = $line.Length }
+    }
+    return $max
+}
+
+function Get-FitBannerLines {
+    param(
+        [string[]]$Lines,
+        [int]$TerminalWidth
+    )
+    $margin = 2
+    $target = [Math]::Max(24, $TerminalWidth - $margin)
+    $current = @($Lines)
+    while ((Get-BannerMaxWidth $current) -gt $target -and $current.Count -gt 1) {
+        $current = @(Scale-BannerLines $current)
+    }
+    return @($current)
+}
+
+function Write-Banner {
+    try {
+        if ($Host.UI.RawUI) {
+            $Host.UI.RawUI.WindowTitle = 'T3MP3ST Updater'
+        }
+        chcp 65001 | Out-Null
+        [Console]::OutputEncoding = [System.Text.Encoding]::UTF8
+    } catch { }
+
+    $bannerFile = Join-Path $PSScriptRoot 'update-banner.txt'
+    if (Test-Path $bannerFile) {
+        $lines = @(Get-Content -Path $bannerFile -Encoding UTF8 | Where-Object { $_.Trim().Length -gt 0 })
+        $fit = Get-FitBannerLines -Lines $lines -TerminalWidth (Get-TerminalColumns)
+        foreach ($line in $fit) {
+            Write-Host $line -ForegroundColor Cyan
+        }
+    } else {
+        Write-Host 'T3MP3ST' -ForegroundColor Cyan
+    }
+    Write-Host '  T3MP3ST Updater' -ForegroundColor White
+    Write-Host '  Safe upstream sync - secrets, config, and bench artifacts stay local' -ForegroundColor DarkGray
+    Write-Host ''
+}
+
+$script:StepIndex = 0
+$script:StepTotal = 0
+
+function Write-Rule {
+    param([string]$Title = '')
+    $width = [Math]::Min(68, [Math]::Max(40, (Get-TerminalColumns)))
+    Write-Host ''
+    if ($Title) {
+        $head = "-- $Title "
+        $fill = [Math]::Max(0, $width - $Title.Length - 4)
+        Write-Host ($head + ('-' * $fill)) -ForegroundColor Cyan
+    } else {
+        Write-Host ('-' * $width) -ForegroundColor DarkGray
+    }
+}
+
+function Write-Kv {
+    param(
+        [string]$Key,
+        [string]$Value,
+        [ConsoleColor]$ValueColor = 'White'
+    )
+    Write-Host ('  {0,-12}' -f ($Key + ':')) -NoNewline -ForegroundColor DarkGray
+    Write-Host $Value -ForegroundColor $ValueColor
+}
+
+function Write-PlanLine {
+    param([string]$Icon, [string]$Text)
+    Write-Host "    $Icon  $Text" -ForegroundColor Gray
+}
+
+function Get-UpdateStrategyLabel {
+    if ($Hard) { return 'Hard reset to upstream/main' }
+    if ((Get-LocalCommitCount) -eq 0) { return 'First-time sync (upstream snapshot)' }
+    return 'Merge upstream/main'
+}
+
+function Get-UpdatePlanSteps {
+    param([int]$ProtectedCount)
+    $steps = New-Object System.Collections.Generic.List[string]
+    if ($ProtectedCount -gt 0) {
+        [void]$steps.Add("Back up $ProtectedCount protected path(s) to a temp folder")
+    } else {
+        [void]$steps.Add('Skip in-repo backup (no protected project files found)')
+    }
+    if (-not (Test-Path (Join-Path $RepoRoot '.git'))) {
+        [void]$steps.Add('Initialize git and add upstream remote')
+    } else {
+        [void]$steps.Add('Use existing git repo and upstream remote')
+    }
+    [void]$steps.Add("Fetch $UpstreamRemote/$UpstreamBranch")
+    if ($Hard) {
+        [void]$steps.Add('Reset working tree to upstream/main')
+    } elseif ((Get-LocalCommitCount) -eq 0) {
+        [void]$steps.Add('Apply upstream snapshot to project files')
+    } else {
+        [void]$steps.Add('Merge upstream changes into your local branch')
+    }
+    if ($ProtectedCount -gt 0) {
+        [void]$steps.Add('Restore backed-up protected paths')
+    }
+    [void]$steps.Add('Run npm install to refresh dependencies')
+    return ,$steps.ToArray()
+}
+
+function Write-UpdatePlan {
+    param([string[]]$Steps)
+    $n = 1
+    foreach ($step in $Steps) {
+        Write-Host ('  {0,2}.' -f $n) -NoNewline -ForegroundColor Cyan
+        Write-Host " $step" -ForegroundColor White
+        $n++
+    }
+}
+
+function Start-UpdateStep {
+    param([string]$Message)
+    $script:StepIndex++
+    if ($script:StepTotal -gt 0) {
+        Write-Host ""
+        Write-Host "  [$($script:StepIndex)/$($script:StepTotal)] $Message" -ForegroundColor Cyan
+    } else {
+        Write-Host ""
+        Write-Info $Message
+    }
+}
+
+function Write-DoneBox {
+    param(
+        [string]$FromSha,
+        [string]$ToSha,
+        [switch]$Preview
+    )
+    Write-Rule 'Done'
+    if ($Preview) {
+        Write-Host '  Preview only - no files were changed.' -ForegroundColor Yellow
+        Write-Host '  Run without --dry-run when you are ready.' -ForegroundColor DarkGray
+    } else {
+        Write-Host '  Update complete' -ForegroundColor Green
+        Write-Kv 'Before' $FromSha
+        Write-Kv 'After' $ToSha 'Green'
+    }
+    Write-Host ''
+}
+
+function Write-GitInstallHelp {
+    Write-Err 'Git is required but was not found on PATH.'
+    Write-Host ''
+    Write-Host 'Install Git for Windows:' -ForegroundColor Yellow
+    Write-Host '  https://git-scm.com/download/win'
+    Write-Host ''
+    Write-Host 'During setup, choose "Git from the command line and also from 3rd-party software".'
+    Write-Host 'Then reopen your terminal and run:  npm run update'
+}
+
+function Write-NpmInstallHelp {
+    Write-Err 'npm is required but was not found on PATH.'
+    Write-Host ''
+    Write-Host 'Install Node.js (includes npm): https://nodejs.org/' -ForegroundColor Yellow
+    Write-Host 'Then run:  npm run update'
+}
+
+function Write-Info([string]$Message) { Write-Host "[*] $Message" -ForegroundColor Cyan }
+function Write-Ok([string]$Message) { Write-Host "[+] $Message" -ForegroundColor Green }
+function Write-Warn([string]$Message) { Write-Host "[!] $Message" -ForegroundColor Yellow }
+function Write-Err([string]$Message) { Write-Host "[x] $Message" -ForegroundColor Red }
+
+function Test-Command([string]$Name) {
+    return [bool](Get-Command $Name -ErrorAction SilentlyContinue)
+}
+
+function Invoke-Git {
+    param([Parameter(ValueFromRemainingArguments = $true)][string[]]$GitArgs)
+    $oldErrorAction = $ErrorActionPreference
+    $ErrorActionPreference = 'Continue'
+    try {
+        # Git writes progress ("From https://...") to stderr even on success.
+        # With $ErrorActionPreference = 'Stop' that can throw unless we normalize it.
+        $output = & git @GitArgs 2>&1 | ForEach-Object {
+            if ($_ -is [System.Management.Automation.ErrorRecord]) {
+                $_.ToString()
+            } else {
+                $_
+            }
+        }
+        if ($LASTEXITCODE -ne 0) {
+            $text = ($output | Where-Object { $_ } | Out-String).Trim()
+            throw "git $($GitArgs -join ' ') failed: $text"
+        }
+        if ($output) { return ($output | Out-String).Trim() }
+        return ''
+    } finally {
+        $ErrorActionPreference = $oldErrorAction
+    }
+}
+
+function Read-ProtectedManifest {
+    $files = @(
+        (Join-Path $PSScriptRoot 'update-protected.txt'),
+        (Join-Path $PSScriptRoot 'update-protected.local.txt')
+    )
+
+    $patterns = New-Object System.Collections.Generic.List[string]
+    foreach ($manifest in $files) {
+        if (-not (Test-Path $manifest)) { continue }
+        Get-Content $manifest | ForEach-Object {
+            $line = $_.Trim()
+            if (-not $line -or $line.StartsWith('#')) { return }
+            [void]$patterns.Add($line)
+        }
+    }
+
+    if ($patterns.Count -eq 0) {
+        throw 'No protection patterns found in scripts/update-protected.txt'
+    }
+    return ,$patterns
+}
+
+function Test-MatchesProtectedPattern {
+    param(
+        [string]$RelativePath,
+        [string]$Pattern
+    )
+    $rel = $RelativePath -replace '\\', '/'
+    $pat = $Pattern -replace '\\', '/'
+
+    if ($pat.StartsWith('!')) { return $false }
+
+    if ($pat -match '[\*\?]') {
+        $regex = '^' + ($pat -replace '\.', '\.' -replace '\*\*', '::DOUBLESTAR::' -replace '\*', '[^/]*' -replace '::DOUBLESTAR::', '.*') + '$'
+        return [bool]($rel -match $regex)
+    }
+
+    if ($rel -eq $pat) { return $true }
+    if ($pat.EndsWith('/') -and $rel.StartsWith($pat.TrimEnd('/'))) { return $true }
+    return $false
+}
+
+function Get-ProtectedPaths {
+    param([string[]]$Patterns)
+
+    $results = New-Object System.Collections.Generic.HashSet[string]
+    $negations = $Patterns | Where-Object { $_.StartsWith('!') } | ForEach-Object { $_.Substring(1) }
+
+    foreach ($pattern in ($Patterns | Where-Object { -not $_.StartsWith('!') })) {
+        $isDirPattern = $pattern.EndsWith('/')
+        $normalized = ($pattern -replace '\\', '/').TrimEnd('/')
+
+        if ($pattern -match '[\*\?]') {
+            $glob = if ($isDirPattern) { $pattern } else { $pattern }
+            $search = Join-Path $RepoRoot (($glob -split '/')[0])
+            if (-not (Test-Path $search)) {
+                $hits = Get-ChildItem -Path $RepoRoot -Recurse -Force -ErrorAction SilentlyContinue |
+                    Where-Object {
+                        $rel = $_.FullName.Substring($RepoRoot.Length).TrimStart('\', '/')
+                        Test-MatchesProtectedPattern -RelativePath $rel -Pattern $pattern
+                    }
+            } else {
+                $hits = Get-ChildItem -Path $RepoRoot -Recurse -Force -ErrorAction SilentlyContinue |
+                    Where-Object {
+                        $rel = $_.FullName.Substring($RepoRoot.Length).TrimStart('\', '/')
+                        Test-MatchesProtectedPattern -RelativePath $rel -Pattern $pattern
+                    }
+            }
+            foreach ($hit in $hits) {
+                $rel = $hit.FullName.Substring($RepoRoot.Length).TrimStart('\', '/')
+                [void]$results.Add($rel)
+            }
+            continue
+        }
+
+        $full = Join-Path $RepoRoot $normalized
+        if (Test-Path $full) {
+            $rel = $full.Substring($RepoRoot.Length).TrimStart('\', '/')
+            [void]$results.Add($rel)
+        }
+    }
+
+    $final = New-Object System.Collections.Generic.List[string]
+    foreach ($rel in ($results | Sort-Object)) {
+        $skip = $false
+        foreach ($neg in $negations) {
+            if (Test-MatchesProtectedPattern -RelativePath $rel -Pattern $neg) {
+                $skip = $true
+                break
+            }
+        }
+        if (-not $skip) { [void]$final.Add($rel) }
+    }
+    return ,$final
+}
+
+function Backup-ProtectedPaths {
+    param(
+        [string[]]$RelativePaths,
+        [string]$BackupRoot
+    )
+
+    New-Item -ItemType Directory -Path $BackupRoot -Force | Out-Null
+    $manifest = Join-Path $BackupRoot 'manifest.json'
+    $entries = @()
+
+    foreach ($rel in $RelativePaths) {
+        $src = Join-Path $RepoRoot $rel
+        if (-not (Test-Path $src)) { continue }
+        $dest = Join-Path $BackupRoot $rel
+        $destParent = Split-Path $dest -Parent
+        if (-not (Test-Path $destParent)) {
+            New-Item -ItemType Directory -Path $destParent -Force | Out-Null
+        }
+        Copy-Item -Path $src -Destination $dest -Recurse -Force
+        $entries += $rel
+    }
+
+    $entries | ConvertTo-Json | Set-Content -Path $manifest -Encoding UTF8
+    return $entries
+}
+
+function Restore-ProtectedPaths {
+    param([string]$BackupRoot)
+
+    $manifest = Join-Path $BackupRoot 'manifest.json'
+    if (-not (Test-Path $manifest)) {
+        Write-Warn 'No backup manifest found; skipping restore.'
+        return
+    }
+
+    $entries = Get-Content $manifest | ConvertFrom-Json
+    foreach ($rel in $entries) {
+        $src = Join-Path $BackupRoot $rel
+        if (-not (Test-Path $src)) { continue }
+        $dest = Join-Path $RepoRoot $rel
+        $destParent = Split-Path $dest -Parent
+        if (-not (Test-Path $destParent)) {
+            New-Item -ItemType Directory -Path $destParent -Force | Out-Null
+        }
+        if (Test-Path $dest) {
+            Remove-Item -Path $dest -Recurse -Force
+        }
+        Copy-Item -Path $src -Destination $dest -Recurse -Force
+    }
+}
+
+function Get-ShortSha {
+    param([string]$Ref)
+    try {
+        return (Invoke-Git rev-parse --short $Ref)
+    } catch {
+        return '(unknown)'
+    }
+}
+
+function Ensure-GitRepository {
+    if (Test-Path (Join-Path $RepoRoot '.git')) { return }
+
+    Write-Warn 'No .git directory - bootstrapping a local repository.'
+    if ($DryRun) {
+        Write-Info '[dry-run] would run: git init'
+        return
+    }
+
+    Invoke-Git init | Out-Null
+    Invoke-Git branch -M $UpstreamBranch | Out-Null
+}
+
+function Ensure-UpstreamRemote {
+    $remotes = @()
+    if (Test-Path (Join-Path $RepoRoot '.git')) {
+        $remotes = (Invoke-Git remote) -split "`n" | Where-Object { $_ }
+    }
+
+    if ($remotes -contains $UpstreamRemote) {
+        $url = Invoke-Git remote get-url $UpstreamRemote
+        if ($url -ne $UpstreamUrl) {
+            Write-Warn "Remote $UpstreamRemote points to $url - updating to $UpstreamUrl"
+            if (-not $DryRun) {
+                Invoke-Git remote set-url $UpstreamRemote $UpstreamUrl | Out-Null
+            }
+        }
+        return
+    }
+
+    Write-Info "Adding remote $UpstreamRemote -> $UpstreamUrl"
+    if (-not $DryRun) {
+        Invoke-Git remote add $UpstreamRemote $UpstreamUrl | Out-Null
+    }
+}
+
+function Get-LocalCommitCount {
+    if (-not (Test-Path (Join-Path $RepoRoot '.git'))) { return 0 }
+    try {
+        $count = Invoke-Git rev-list --count HEAD
+        return [int]$count
+    } catch {
+        return 0
+    }
+}
+
+function Clear-WorkingTreeExceptGit {
+    Get-ChildItem -Path $RepoRoot -Force |
+        Where-Object { $_.Name -ne '.git' } |
+        Remove-Item -Recurse -Force
+}
+
+function Apply-UpstreamUpdate {
+    if ($DryRun) {
+        Write-Info "[dry-run] would run: git fetch $UpstreamRemote $UpstreamBranch"
+        if ($Hard) {
+            Write-Info "[dry-run] would run: git reset --hard $UpstreamRemote/$UpstreamBranch"
+        } elseif ((Get-LocalCommitCount) -eq 0) {
+            Write-Info '[dry-run] would apply upstream snapshot (checkout upstream/main)'
+            Write-Info "[dry-run] would run: git checkout -B $UpstreamBranch $UpstreamRemote/$UpstreamBranch"
+        } else {
+            Write-Info "[dry-run] would run: git merge $UpstreamRemote/$UpstreamBranch"
+        }
+        return
+    }
+
+    Invoke-Git fetch $UpstreamRemote $UpstreamBranch | Out-Null
+
+    if ($Hard) {
+        Invoke-Git reset --hard "$UpstreamRemote/$UpstreamBranch" | Out-Null
+        return
+    }
+
+    if ((Get-LocalCommitCount) -eq 0) {
+        # Copied/zipped folder without git history: untracked files block checkout.
+        # Protected paths are already in temp backup, so replace the tree with upstream.
+        Write-Info 'First-time git sync: applying upstream snapshot (local copy had no commits)...'
+        Clear-WorkingTreeExceptGit
+        Invoke-Git checkout -B $UpstreamBranch "$UpstreamRemote/$UpstreamBranch" | Out-Null
+        return
+    }
+
+    try {
+        Invoke-Git merge "$UpstreamRemote/$UpstreamBranch" --no-edit | Out-Null
+    } catch {
+        Write-Err 'Merge failed - resolve conflicts manually or re-run with -Hard.'
+        throw
+    }
+}
+
+function Install-NpmPackages {
+    if (-not (Test-Path (Join-Path $RepoRoot 'package.json'))) {
+        throw 'package.json not found in repo root.'
+    }
+    if (-not (Test-Command 'npm')) {
+        throw 'npm is not installed or not on PATH.'
+    }
+
+    if ($DryRun) {
+        Write-Info '[dry-run] would run: npm install'
+        return
+    }
+
+    Write-Info 'Running npm install...'
+    & npm install
+    if ($LASTEXITCODE -ne 0) {
+        throw 'npm install failed.'
+    }
+}
+
+# --- main ---
+Write-Banner
+
+if (-not (Test-Path (Join-Path $RepoRoot 'package.json'))) {
+    Write-Err "Not a T3MP3ST repo (package.json missing): $RepoRoot"
+    exit 1
+}
+
+if (-not (Test-Command 'git')) {
+    Write-GitInstallHelp
+    exit 1
+}
+if (-not (Test-Command 'npm')) {
+    Write-NpmInstallHelp
+    exit 1
+}
+
+$patterns = Read-ProtectedManifest
+$protected = Get-ProtectedPaths -Patterns $patterns
+$planSteps = Get-UpdatePlanSteps -ProtectedCount $protected.Count
+$platformLabel = if ($IsWindows -or $env:OS -match 'Windows') { 'Windows' } else { 'Unix' }
+
+Write-Rule 'Overview'
+Write-Kv 'Platform' "$platformLabel (PowerShell)"
+Write-Kv 'Repository' $RepoRoot
+Write-Kv 'Upstream' "$UpstreamUrl @ $UpstreamBranch"
+$strategyLabel = Get-UpdateStrategyLabel
+$strategyColor = if ($Hard) { 'Yellow' } elseif ((Get-LocalCommitCount) -eq 0) { 'Cyan' } else { 'White' }
+Write-Kv 'Strategy' $strategyLabel $strategyColor
+if ($DryRun) { Write-Kv 'Mode' 'Dry run (preview only)' 'Yellow' }
+
+Write-Rule 'Protected paths in this repo'
+if ($protected.Count -eq 0) {
+    Write-PlanLine '-' 'No protected project files in this repo (.env, .keys.*, bench output, etc.)'
+} else {
+    foreach ($p in $protected) { Write-PlanLine '+' $p }
+}
+
+Write-Rule 'Never touched (outside repo)'
+Write-PlanLine '-' '%APPDATA%\t3mp3st-nodejs\Config\config.json'
+Write-PlanLine '-' 'War Room browser localStorage'
+Write-PlanLine '-' 'Codex / Hermes local agent auth'
+
+$localSha = '(no git yet)'
+$upstreamSha = '(unknown)'
+if (Test-Path (Join-Path $RepoRoot '.git')) {
+    try { $localSha = Get-ShortSha 'HEAD' } catch { $localSha = '(no commits yet)' }
+}
+try {
+    Ensure-GitRepository
+    Ensure-UpstreamRemote
+    if (-not $DryRun) {
+        Invoke-Git fetch $UpstreamRemote $UpstreamBranch | Out-Null
+        $upstreamSha = Get-ShortSha "$UpstreamRemote/$UpstreamBranch"
+    } else {
+        $upstreamSha = '(preview)'
+    }
+} catch {
+    Write-Warn "Could not prefetch upstream: $($_.Exception.Message)"
+}
+
+Write-Rule 'Revisions'
+Write-Kv 'Local' $localSha
+Write-Kv 'Upstream' $upstreamSha 'Cyan'
+
+Write-Rule 'Sync plan'
+Write-UpdatePlan -Steps $planSteps
+
+if (-not $Force) {
+    Write-Host ''
+    $answer = Read-Host 'Proceed with update? [y/N]'
+    if ($answer -notmatch '^(y|yes)$') {
+        Write-Warn 'Cancelled - no changes made.'
+        exit 0
+    }
+}
+
+$timestamp = Get-Date -Format 'yyyyMMdd-HHmmss'
+$backupRoot = Join-Path ([System.IO.Path]::GetTempPath()) "t3mp3st-update-backup-$timestamp"
+$oldSha = $localSha
+$script:StepTotal = 2 + $(if ($protected.Count -gt 0) { 2 } else { 0 })
+$script:StepIndex = 0
+
+try {
+    if ($protected.Count -gt 0) {
+        Start-UpdateStep "Backing up protected files"
+        if (-not $DryRun) {
+            $backedUp = Backup-ProtectedPaths -RelativePaths $protected -BackupRoot $backupRoot
+            Write-Ok "Backed up $($backedUp.Count) path(s)"
+        } else {
+            Write-Info '[dry-run] would back up protected paths'
+        }
+    }
+
+    Start-UpdateStep 'Syncing from upstream'
+    Ensure-GitRepository
+    Ensure-UpstreamRemote
+    Apply-UpstreamUpdate
+    if (-not $DryRun) { Write-Ok 'Git sync finished' }
+
+    if ($protected.Count -gt 0) {
+        Start-UpdateStep 'Restoring protected files'
+        if (-not $DryRun) {
+            Restore-ProtectedPaths -BackupRoot $backupRoot
+            Write-Ok 'Protected paths restored'
+        } else {
+            Write-Info '[dry-run] would restore protected paths'
+        }
+    }
+
+    Start-UpdateStep 'Refreshing npm packages'
+    Install-NpmPackages
+    if (-not $DryRun) { Write-Ok 'npm install finished' }
+
+    $newSha = if ($DryRun) { $upstreamSha } else { Get-ShortSha 'HEAD' }
+
+    Write-DoneBox -FromSha $oldSha -ToSha $newSha -Preview:($DryRun)
+
+    if (-not $KeepBackup -and -not $DryRun -and (Test-Path $backupRoot)) {
+        Remove-Item -Path $backupRoot -Recurse -Force
+    } elseif ((Test-Path $backupRoot)) {
+        Write-Info "Backup kept at $backupRoot"
+    }
+} catch {
+    Write-Host ''
+    Write-Err $_.Exception.Message
+    if ((Test-Path $backupRoot)) {
+        Write-Warn "Backup preserved at $backupRoot"
+    }
+    exit 1
+}
diff --git a/scripts/update.sh b/scripts/update.sh
new file mode 100644
index 0000000..d628fe6
--- /dev/null
+++ b/scripts/update.sh
@@ -0,0 +1,392 @@
+#!/usr/bin/env bash
+# Linux / macOS / WSL updater (Windows uses update.ps1 via scripts/update.mjs).
+set -euo pipefail
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+UPSTREAM_URL='https://github.com/elder-plinius/T3MP3ST.git'
+UPSTREAM_BRANCH='main'
+UPSTREAM_REMOTE='upstream'
+DRY_RUN=0
+HARD=0
+FORCE=0
+KEEP_BACKUP=0
+STEP_INDEX=0
+STEP_TOTAL=0
+
+if [[ -t 1 ]]; then
+  C_CYAN=$'\033[36m'
+  C_GREEN=$'\033[32m'
+  C_YELLOW=$'\033[33m'
+  C_GRAY=$'\033[90m'
+  C_WHITE=$'\033[97m'
+  C_RESET=$'\033[0m'
+else
+  C_CYAN='' C_GREEN='' C_YELLOW='' C_GRAY='' C_WHITE='' C_RESET=''
+fi
+
+rule() {
+  local title="${1:-}"
+  local width=68
+  echo
+  if [[ -n "$title" ]]; then
+    local fill=$((width - ${#title} - 4))
+    [[ $fill -lt 0 ]] && fill=0
+    printf '%s── %s %s%s\n' "$C_CYAN" "$title" "$(printf '─%.0s' $(seq 1 "$fill"))" "$C_RESET"
+  else
+    printf '%s%s%s\n' "$C_GRAY" "$(printf '─%.0s' $(seq 1 "$width"))" "$C_RESET"
+  fi
+}
+
+kv() {
+  local key="$1" val="$2" color="${3:-$C_WHITE}"
+  printf '  %-12s %b%s%b\n' "${key}:" "$color" "$val" "$C_RESET"
+}
+
+plan_line() {
+  printf '    %s  %s\n' "$1" "$2"
+}
+
+start_step() {
+  STEP_INDEX=$((STEP_INDEX + 1))
+  echo
+  if [[ "$STEP_TOTAL" -gt 0 ]]; then
+    printf '  %s[%d/%d] %s%s\n' "$C_CYAN" "$STEP_INDEX" "$STEP_TOTAL" "$1" "$C_RESET"
+  else
+    printf '  [*] %s\n' "$1"
+  fi
+}
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    -DryRun|--dry-run) DRY_RUN=1 ;;
+    -Hard|--hard) HARD=1 ;;
+    -Force|--force) FORCE=1 ;;
+    -KeepBackup|--keep-backup) KEEP_BACKUP=1 ;;
+    *) echo "Unknown option: $1" >&2; exit 2 ;;
+  esac
+  shift
+done
+
+git_install_help() {
+  echo '[x] Git is required but was not found on PATH.' >&2
+  echo >&2
+  case "$(uname -s 2>/dev/null || echo unknown)" in
+    Darwin)
+      echo 'Install options:' >&2
+      echo '  brew install git' >&2
+      echo '  xcode-select --install' >&2
+      ;;
+    Linux|GNU/*)
+      echo 'Install with your package manager, for example:' >&2
+      echo '  sudo apt install git        # Debian/Ubuntu' >&2
+      echo '  sudo dnf install git        # Fedora' >&2
+      echo '  sudo pacman -S git          # Arch' >&2
+      echo 'More: https://git-scm.com/download/linux' >&2
+      ;;
+    *)
+      echo 'Install Git: https://git-scm.com/downloads' >&2
+      ;;
+  esac
+  echo >&2
+  echo 'Then run:  npm run update' >&2
+}
+
+npm_install_help() {
+  echo '[x] npm is required but was not found on PATH.' >&2
+  echo 'Install Node.js (includes npm): https://nodejs.org/' >&2
+  echo 'Then run:  npm run update' >&2
+}
+
+cd "$ROOT"
+[[ -f package.json ]] || { echo '[x] package.json missing' >&2; exit 1; }
+command -v git >/dev/null 2>&1 || { git_install_help; exit 1; }
+command -v npm >/dev/null 2>&1 || { npm_install_help; exit 1; }
+
+if [[ -f "$ROOT/scripts/update-banner.txt" ]]; then
+  cat "$ROOT/scripts/update-banner.txt"
+else
+  echo 'T3MP3ST'
+fi
+echo '  T3MP3ST Updater'
+echo '  Safe upstream sync - secrets, config, and bench artifacts stay local'
+echo
+
+backup="$(mktemp -d -t t3mp3st-update-backup.XXXXXX)"
+manifest="$backup/manifest.txt"
+: >"$manifest"
+protected_count=0
+protected_list="$(mktemp)"
+
+on_err() {
+  echo >&2
+  echo '[x] Update failed partway through.' >&2
+  if [[ -f "$manifest" && -s "$manifest" ]]; then
+    echo "    Local backup of protected files: $backup" >&2
+  fi
+}
+trap on_err ERR
+
+protect_patterns() {
+  grep -v '^#' "$ROOT/scripts/update-protected.txt" | grep -v '^[[:space:]]*$' || true
+  [[ -f "$ROOT/scripts/update-protected.local.txt" ]] && grep -v '^#' "$ROOT/scripts/update-protected.local.txt" | grep -v '^[[:space:]]*$' || true
+}
+
+path_matches_pattern() {
+  local rel="$1" pat="$2"
+  pat="${pat//\\//}"
+  rel="${rel//\\//}"
+
+  if [[ "$pat" == */ ]]; then
+    local prefix="${pat%/}"
+    [[ "$rel" == "$prefix" || "$rel" == "$prefix"/* ]]
+    return
+  fi
+
+  if [[ "$pat" == *[*?]* ]]; then
+    case "$rel" in
+      $pat) return 0 ;;
+    esac
+    return 1
+  fi
+
+  [[ "$rel" == "$pat" ]]
+}
+
+collect_positive_pattern() {
+  local pat="$1"
+  if [[ "$pat" == */ ]]; then
+    local rel="${pat%/}"
+    [[ -e "$ROOT/$rel" ]] || return 0
+    echo "$rel" >>"$protected_list"
+  elif [[ "$pat" == *'*'* ]]; then
+    find "$ROOT" -path "$ROOT/$pat" -print 2>/dev/null | while IFS= read -r hit; do
+      echo "${hit#"$ROOT/"}" >>"$protected_list"
+    done
+  else
+    [[ -e "$ROOT/$pat" ]] || return 0
+    echo "$pat" >>"$protected_list"
+  fi
+}
+
+apply_negation_patterns() {
+  local -a negations=()
+  while IFS= read -r pat; do
+    [[ "$pat" == !* ]] || continue
+    negations+=("${pat:1}")
+  done < <(protect_patterns)
+  [[ "${#negations[@]}" -eq 0 ]] && return 0
+
+  local filtered
+  filtered="$(mktemp)"
+  while IFS= read -r rel; do
+    [[ -n "$rel" ]] || continue
+    local skip=0 neg
+    for neg in "${negations[@]}"; do
+      if path_matches_pattern "$rel" "$neg"; then
+        skip=1
+        break
+      fi
+    done
+    [[ "$skip" -eq 0 ]] && echo "$rel" >>"$filtered"
+  done <"$protected_list"
+  mv "$filtered" "$protected_list"
+}
+
+collect_protected() {
+  while IFS= read -r pat; do
+    [[ "$pat" == !* ]] && continue
+    collect_positive_pattern "$pat"
+  done < <(protect_patterns)
+  apply_negation_patterns
+}
+
+backup_protected() {
+  : >"$manifest"
+  while IFS= read -r rel; do
+    [[ -n "$rel" && -e "$ROOT/$rel" ]] || continue
+    mkdir -p "$backup/$(dirname "$rel")"
+    cp -a "$ROOT/$rel" "$backup/$rel"
+    echo "$rel" >>"$manifest"
+  done <"$protected_list"
+}
+
+collect_protected
+protected_count="$(grep -c . "$protected_list" 2>/dev/null || echo 0)"
+protected_count="$(echo "$protected_count" | tr -d '[:space:]')"
+[[ "$protected_count" =~ ^[0-9]+$ ]] || protected_count=0
+
+commit_count="$(git rev-list --count HEAD 2>/dev/null || echo 0)"
+[[ -d .git ]] || commit_count=0
+
+strategy='Merge upstream/main'
+if [[ "$HARD" -eq 1 ]]; then
+  strategy='Hard reset to upstream/main'
+elif [[ "$commit_count" -eq 0 ]]; then
+  strategy='First-time sync (upstream snapshot)'
+fi
+
+platform_label="$(uname -s 2>/dev/null || echo Unix)"
+case "$platform_label" in
+  Darwin) platform_label='macOS' ;;
+  Linux) platform_label='Linux' ;;
+esac
+
+rule 'Overview'
+kv 'Platform' "$platform_label (bash)" "$C_WHITE"
+kv 'Repository' "$ROOT" "$C_WHITE"
+kv 'Upstream' "$UPSTREAM_URL @ $UPSTREAM_BRANCH" "$C_WHITE"
+kv 'Strategy' "$strategy" "$C_CYAN"
+[[ "$DRY_RUN" -eq 1 ]] && kv 'Mode' 'Dry run (preview only)' "$C_YELLOW"
+
+rule 'Protected paths in this repo'
+if [[ "$protected_count" -eq 0 ]]; then
+  plan_line '-' 'No protected project files in this repo (.env, .keys.*, bench output, etc.)'
+else
+  while IFS= read -r rel; do
+    [[ -n "$rel" ]] && plan_line '+' "$rel"
+  done <"$protected_list"
+fi
+
+rule 'Never touched (outside repo)'
+plan_line '-' '$HOME/.config or AppData t3mp3st config'
+plan_line '-' 'War Room browser localStorage'
+plan_line '-' 'Codex / Hermes local agent auth'
+
+local_sha='(no commits yet)'
+upstream_sha='(unknown)'
+if git rev-parse HEAD >/dev/null 2>&1; then
+  local_sha="$(git rev-parse --short HEAD 2>/dev/null || echo '(no commits yet)')"
+fi
+if [[ "$DRY_RUN" -eq 1 ]]; then
+  upstream_sha='(preview)'
+elif git rev-parse "$UPSTREAM_REMOTE/$UPSTREAM_BRANCH" >/dev/null 2>&1; then
+  upstream_sha="$(git rev-parse --short "$UPSTREAM_REMOTE/$UPSTREAM_BRANCH")"
+fi
+
+rule 'Revisions'
+kv 'Local' "$local_sha" "$C_WHITE"
+kv 'Upstream' "$upstream_sha" "$C_CYAN"
+
+plan_steps=()
+if [[ "$protected_count" -gt 0 ]]; then
+  plan_steps+=("Back up $protected_count protected path(s) to a temp folder")
+else
+  plan_steps+=('Skip in-repo backup (no protected project files found)')
+fi
+if [[ ! -d .git ]]; then
+  plan_steps+=('Initialize git and add upstream remote')
+else
+  plan_steps+=('Use existing git repo and upstream remote')
+fi
+plan_steps+=("Fetch $UPSTREAM_REMOTE/$UPSTREAM_BRANCH")
+if [[ "$HARD" -eq 1 ]]; then
+  plan_steps+=('Reset working tree to upstream/main')
+elif [[ "$commit_count" -eq 0 ]]; then
+  plan_steps+=('Apply upstream snapshot to project files')
+else
+  plan_steps+=('Merge upstream changes into your local branch')
+fi
+if [[ "$protected_count" -gt 0 ]]; then
+  plan_steps+=('Restore backed-up protected paths')
+fi
+plan_steps+=('Run npm install to refresh dependencies')
+
+rule 'Sync plan'
+n=1
+for step in "${plan_steps[@]}"; do
+  printf '  %2d. %s\n' "$n" "$step"
+  n=$((n + 1))
+done
+
+if [[ "$FORCE" -eq 0 ]]; then
+  echo
+  printf 'Proceed with update? [y/N] '
+  read -r ans
+  [[ "$ans" =~ ^[Yy]([Ee][Ss])?$ ]] || { echo '[!] Cancelled - no changes made.'; rm -rf "$backup"; trap - ERR; exit 0; }
+fi
+
+STEP_TOTAL=2
+[[ "$protected_count" -gt 0 ]] && STEP_TOTAL=$((STEP_TOTAL + 2))
+STEP_INDEX=0
+
+if [[ "$protected_count" -gt 0 ]]; then
+  start_step 'Backing up protected files'
+  if [[ "$DRY_RUN" -eq 1 ]]; then
+    echo '  [*] [dry-run] would back up protected paths'
+  else
+    backup_protected
+    printf '  [+] Backed up %d path(s)\n' "$protected_count"
+  fi
+fi
+
+start_step 'Syncing from upstream'
+if [[ "$DRY_RUN" -eq 1 ]]; then
+  [[ -d .git ]] || echo '  [*] [dry-run] would run: git init'
+  if [[ -d .git ]] && ! git remote get-url "$UPSTREAM_REMOTE" >/dev/null 2>&1; then
+    echo "  [*] [dry-run] would run: git remote add $UPSTREAM_REMOTE $UPSTREAM_URL"
+  fi
+  echo "  [*] [dry-run] would run: git fetch $UPSTREAM_REMOTE $UPSTREAM_BRANCH"
+  if [[ "$HARD" -eq 1 ]]; then
+    echo "  [*] [dry-run] would run: git reset --hard $UPSTREAM_REMOTE/$UPSTREAM_BRANCH"
+  elif [[ "$commit_count" -eq 0 ]]; then
+    echo '  [*] [dry-run] would apply upstream snapshot (checkout upstream/main)'
+    echo "  [*] [dry-run] would run: git checkout -B $UPSTREAM_BRANCH $UPSTREAM_REMOTE/$UPSTREAM_BRANCH"
+  else
+    echo "  [*] [dry-run] would run: git merge $UPSTREAM_REMOTE/$UPSTREAM_BRANCH"
+  fi
+else
+  [[ -d .git ]] || git init
+  git remote get-url "$UPSTREAM_REMOTE" >/dev/null 2>&1 || git remote add "$UPSTREAM_REMOTE" "$UPSTREAM_URL"
+  git fetch "$UPSTREAM_REMOTE" "$UPSTREAM_BRANCH" 2>&1 || true
+
+  if [[ "$HARD" -eq 1 ]]; then
+    git reset --hard "$UPSTREAM_REMOTE/$UPSTREAM_BRANCH"
+  elif [[ "$commit_count" -eq 0 ]]; then
+    find "$ROOT" -mindepth 1 -maxdepth 1 ! -name '.git' -exec rm -rf {} +
+    git checkout -B "$UPSTREAM_BRANCH" "$UPSTREAM_REMOTE/$UPSTREAM_BRANCH"
+  else
+    git merge "$UPSTREAM_REMOTE/$UPSTREAM_BRANCH" --no-edit
+  fi
+  echo '  [+] Git sync finished'
+fi
+
+if [[ "$protected_count" -gt 0 ]]; then
+  start_step 'Restoring protected files'
+  if [[ "$DRY_RUN" -eq 1 ]]; then
+    echo '  [*] [dry-run] would restore protected paths'
+  else
+    while IFS= read -r rel; do
+      [[ -n "$rel" && -e "$backup/$rel" ]] || continue
+      mkdir -p "$(dirname "$ROOT/$rel")"
+      rm -rf "$ROOT/$rel"
+      cp -a "$backup/$rel" "$ROOT/$rel"
+    done <"$manifest"
+    echo '  [+] Protected paths restored'
+  fi
+fi
+
+start_step 'Refreshing npm packages'
+if [[ "$DRY_RUN" -eq 1 ]]; then
+  echo '  [*] [dry-run] would run: npm install'
+else
+  npm install
+  echo '  [+] npm install finished'
+fi
+
+new_sha="$upstream_sha"
+if [[ "$DRY_RUN" -eq 0 ]] && git rev-parse HEAD >/dev/null 2>&1; then
+  new_sha="$(git rev-parse --short HEAD)"
+fi
+
+rule 'Done'
+if [[ "$DRY_RUN" -eq 1 ]]; then
+  echo '  Preview only - no files were changed.'
+  echo '  Run without --dry-run when you are ready.'
+else
+  echo '  Update complete'
+  kv 'Before' "$local_sha" "$C_WHITE"
+  kv 'After' "$new_sha" "$C_GREEN"
+fi
+echo
+
+trap - ERR
+[[ "$KEEP_BACKUP" -eq 1 ]] || rm -rf "$backup"