fix: harden terminal action endpoints

server.mjs

@@ -39,6 +39,7 @@ let sweepStartedAt = null; // Timestamp when current/last sweep started
 let sweepInProgress = false;
 const startTime = Date.now();
 const sseClients = new Set();
+const terminalActionBuckets = new Map();
 
 // === Delta/Memory ===
 const memory = new MemoryManager(RUNS_DIR);
@@ -289,14 +290,34 @@ app.get('/api/metrics', (req, res) => {
 });
 
 app.post('/api/sweep', express.json(), (req, res) => {
-  const remote = req.ip || '';
-  const local = remote.includes('127.0.0.1') || remote === '::1' || remote === '::ffff:127.0.0.1';
-  const token = req.get('x-crucix-token') || req.query.token || req.body?.token;
-  if (config.sweepToken && token !== config.sweepToken) return res.status(401).json({ error: 'Invalid sweep token' });
-  if (!config.sweepToken && !local) return res.status(403).json({ error: 'Manual sweep is local-only unless SWEEP_TOKEN is set' });
-  if (sweepInProgress) return res.status(409).json({ status: 'already_running', sweepStartedAt });
-  runSweepCycle().catch(err => console.error('[Crucix] API-triggered sweep failed:', err.message));
-  res.status(202).json({ status: 'accepted' });
+  const guard = authorizeTerminalAction(req, res, 'sweep');
+  if (!guard.ok) return;
+  triggerSweepAction(req, res, 'sweep');
+});
+
+app.post('/api/action', express.json(), (req, res) => {
+  const action = String(req.body?.action || req.body?.command || '').trim().toLowerCase();
+  const guard = authorizeTerminalAction(req, res, action || 'unknown');
+  if (!guard.ok) return;
+
+  if (action === 'status') {
+    auditTerminalAction(req, 'status', 'ok');
+    return res.json({ status: 'ok', health: buildHealth() });
+  }
+
+  if (action === 'brief') {
+    if (!currentData) {
+      auditTerminalAction(req, 'brief', 'rejected', 'no_data');
+      return res.status(503).json({ error: 'No data yet - first sweep in progress' });
+    }
+    auditTerminalAction(req, 'brief', 'ok');
+    return res.json({ status: 'ok', brief: buildBrief(currentData) });
+  }
+
+  if (action === 'sweep') return triggerSweepAction(req, res, 'action:sweep');
+
+  auditTerminalAction(req, action || 'unknown', 'rejected', 'unknown_action');
+  return res.status(400).json({ error: 'Unknown action', allowed: ['status', 'brief', 'sweep'] });
 });
 
 // API: available locales
@@ -327,6 +348,108 @@ function broadcast(data) {
   }
 }
 
+function requestIp(req) {
+  return req.ip || req.socket?.remoteAddress || 'unknown';
+}
+
+function isLocalRequest(req) {
+  const remote = requestIp(req);
+  return remote === '::1'
+    || remote === '127.0.0.1'
+    || remote === '::ffff:127.0.0.1'
+    || remote.startsWith('127.')
+    || remote === 'localhost';
+}
+
+function sameOriginPost(req) {
+  const origin = req.get('origin');
+  if (!origin) return true;
+  try {
+    const originUrl = new URL(origin);
+    const host = req.get('host');
+    return host && originUrl.host === host;
+  } catch {
+    return false;
+  }
+}
+
+function actionToken(req) {
+  return req.get('x-crucix-token') || req.body?.token || null;
+}
+
+function auditTerminalAction(req, action, outcome, detail = null) {
+  const suffix = detail ? ` detail=${detail}` : '';
+  console.log(`[Crucix][audit] terminal_action action=${action || 'unknown'} outcome=${outcome} ip=${requestIp(req)}${suffix}`);
+}
+
+function rateLimitTerminalAction(req, action) {
+  const now = Date.now();
+  const windowMs = Math.max(1000, config.terminalActionRateLimitWindowMs || 60_000);
+  const max = Math.max(1, config.terminalActionRateLimitMax || 10);
+  const key = `${requestIp(req)}:${action}`;
+  const bucket = terminalActionBuckets.get(key);
+  if (!bucket || now > bucket.resetAt) {
+    terminalActionBuckets.set(key, { count: 1, resetAt: now + windowMs });
+    return { ok: true };
+  }
+  bucket.count += 1;
+  if (bucket.count > max) {
+    return { ok: false, retryAfterSeconds: Math.ceil((bucket.resetAt - now) / 1000) };
+  }
+  return { ok: true };
+}
+
+function authorizeTerminalAction(req, res, action) {
+  const rate = rateLimitTerminalAction(req, action);
+  if (!rate.ok) {
+    auditTerminalAction(req, action, 'rejected', 'rate_limited');
+    res.set('Retry-After', String(rate.retryAfterSeconds));
+    res.status(429).json({ error: 'Too many terminal actions', retryAfterSeconds: rate.retryAfterSeconds });
+    return { ok: false };
+  }
+
+  if (!sameOriginPost(req)) {
+    auditTerminalAction(req, action, 'rejected', 'csrf_origin');
+    res.status(403).json({ error: 'Origin mismatch' });
+    return { ok: false };
+  }
+
+  const local = isLocalRequest(req);
+  const token = actionToken(req);
+  if (!config.terminalActionsEnabled) {
+    auditTerminalAction(req, action, 'rejected', 'disabled');
+    res.status(403).json({ error: 'Terminal actions are disabled' });
+    return { ok: false };
+  }
+
+  if (config.sweepToken) {
+    if (token !== config.sweepToken) {
+      auditTerminalAction(req, action, 'rejected', 'invalid_token');
+      res.status(401).json({ error: 'Invalid terminal action token' });
+      return { ok: false };
+    }
+    return { ok: true };
+  }
+
+  if (!local) {
+    auditTerminalAction(req, action, 'rejected', 'missing_token');
+    res.status(403).json({ error: 'Terminal actions are local-only unless SWEEP_TOKEN is set' });
+    return { ok: false };
+  }
+
+  return { ok: true };
+}
+
+function triggerSweepAction(req, res, auditAction) {
+  if (sweepInProgress) {
+    auditTerminalAction(req, auditAction, 'rejected', 'already_running');
+    return res.status(409).json({ status: 'already_running', sweepStartedAt });
+  }
+  auditTerminalAction(req, auditAction, 'accepted');
+  runSweepCycle().catch(err => console.error('[Crucix] API-triggered sweep failed:', err.message));
+  return res.status(202).json({ status: 'accepted' });
+}
+
 function dataAgeMs() {
   const ts = currentData?.meta?.timestamp || lastSuccessfulSweepTime || lastSweepTime;
   const ms = ts ? Date.now() - new Date(ts).getTime() : null;
@@ -376,6 +499,8 @@ function buildHealth() {
     llm: getLLMStatus(),
     telegramEnabled: !!(config.telegram.botToken && config.telegram.chatId),
     discordEnabled: !!(config.discord?.botToken || config.discord?.webhookUrl),
+    terminalActionsEnabled: config.terminalActionsEnabled,
+    terminalActionsTokenRequired: !!config.sweepToken,
     refreshIntervalMinutes: config.refreshIntervalMinutes,
     language: currentLanguage,
     memory: intelligenceStore.status(),