diff --git a/src/core/service-snapshot-summary.mjs b/src/core/service-snapshot-summary.mjs
new file mode 100644
index 0000000..c297fee
--- /dev/null
+++ b/src/core/service-snapshot-summary.mjs
@@ -0,0 +1,150 @@
+const COMMON_STATE_FIELDS = [
+  'paused',
+  'armed',
+  'last_error',
+  'last_event_at',
+  'last_runtime_eval_at',
+  'last_published_at',
+  'last_publish_error',
+  'publish_count',
+  'last_sync_at',
+  'last_write_at',
+  'last_metrics_at',
+  'last_quote_outcomes_at',
+  'database_connectivity',
+  'source_error_count',
+  'last_source_error_at',
+  'last_bootstrap_at',
+];
+
+export function summarizeServiceSnapshotForSentinel(snapshot = {}) {
+  return {
+    service: snapshot.service,
+    label: snapshot.label,
+    base_url: snapshot.base_url,
+    reachable: snapshot.reachable,
+    state: summarizeServiceState(snapshot.service, snapshot.state),
+    health: snapshot.health || null,
+    error: snapshot.error || null,
+  };
+}
+
+export function summarizeServiceState(service, state) {
+  if (!state || typeof state !== 'object') return state || null;
+
+  switch (service) {
+    case 'near-intents-ingest':
+      return pickFields(state, ['service', 'namespace', 'pair_filter', 'ingest']);
+    case 'market-reference-ingest':
+      return pickFields(state, [
+        'service',
+        'namespace',
+        'paused',
+        'kraken',
+        'coingecko',
+        'last_published_at',
+        'last_publish_error',
+        'publish_count',
+        'error_count',
+        'active_pair',
+      ]);
+    case 'inventory-sync':
+      return {
+        ...pickFields(state, ['service', 'namespace', 'account_id', 'paused', 'last_sync_at', 'last_error', 'publish_count']),
+        last_snapshot: summarizeInventorySnapshot(state.last_snapshot),
+      };
+    case 'liquidity-manager':
+      return pickFields(state, [
+        'service',
+        'namespace',
+        'account_id',
+        'paused',
+        'funding_observer_paused',
+        'withdrawals_frozen',
+        'deposit_addresses',
+        'withdrawal_defaults',
+        'latest_funding_observation_at',
+        'last_refresh_at',
+        'last_error',
+      ]);
+    case 'history-writer':
+      return pickFields(state, [
+        'service',
+        'namespace',
+        'database_connectivity',
+        'last_write_at',
+        'last_alert_write_at',
+        'last_funding_observation_write_at',
+        'last_environment_status_write_at',
+        'last_environment_status_seen_at',
+        'last_environment_status_duplicate_at',
+        'last_metrics_at',
+        'last_quote_outcomes_at',
+        'latest_portfolio_metrics',
+        'latest_quote_outcomes',
+        'offsets',
+        'metrics_error',
+        'quote_outcomes_error',
+      ]);
+    case 'strategy-engine':
+      return pickFields(state, [
+        'service',
+        'namespace',
+        'paused',
+        'armed',
+        'last_error',
+        'latest_decision',
+        'latest_inventory_event',
+        'decision_count',
+        'command_count',
+        'reject_count',
+        'block_count',
+      ]);
+    case 'trade-executor':
+      return pickFields(state, [
+        'service',
+        'namespace',
+        'paused',
+        'armed',
+        'last_error',
+        'relay',
+        'last_result',
+        'last_quote_status',
+        'submitted_count',
+        'failed_count',
+        'blocked_count',
+      ]);
+    case 'operator-dashboard':
+      return pickFields(state, [
+        'service',
+        'namespace',
+        'source_error_count',
+        'last_source_error_at',
+        'last_bootstrap_at',
+        'source_errors',
+      ]);
+    default:
+      return pickFields(state, COMMON_STATE_FIELDS);
+  }
+}
+
+function summarizeInventorySnapshot(snapshot) {
+  if (!snapshot || typeof snapshot !== 'object') return snapshot || null;
+  return pickFields(snapshot, [
+    'inventory_id',
+    'account_id',
+    'synced_at',
+    'spendable',
+    'pending_inbound',
+    'pending_outbound',
+    'reconciliation_status',
+  ]);
+}
+
+function pickFields(source, fields) {
+  const picked = {};
+  for (const field of fields) {
+    if (source[field] !== undefined) picked[field] = source[field];
+  }
+  return picked;
+}
diff --git a/test/ops-sentinel-static.test.mjs b/test/ops-sentinel-static.test.mjs
index 328fe2f..1121b7f 100644
--- a/test/ops-sentinel-static.test.mjs
+++ b/test/ops-sentinel-static.test.mjs
@@ -20,3 +20,12 @@ test('ops sentinel polls official NEAR status and publishes environment status w
   assert.match(source, /normalized\.status_fingerprint === state\.last_environment_status_fingerprint/);
   assert.match(source, /assertEnvironmentStatusEvent/);
 });
+
+test('ops sentinel exposes trimmed service snapshots and computed runtime alerts', () => {
+  assert.match(source, /summarizeServiceSnapshotForSentinel/);
+  assert.match(source, /serviceSnapshots\.map\(summarizeServiceSnapshotForSentinel\)/);
+  assert.match(source, /latest_runtime_alerts: state\.latest_runtime_alerts/);
+  assert.match(source, /active_alerts: state\.latest_runtime_alerts/);
+  assert.match(source, /activeAlerts: desiredRuntimeAlerts/);
+  assert.match(source, /state\.latest_runtime_alerts = desiredRuntimeAlerts/);
+});
diff --git a/test/service-snapshot-summary.test.mjs b/test/service-snapshot-summary.test.mjs
new file mode 100644
index 0000000..32d43db
--- /dev/null
+++ b/test/service-snapshot-summary.test.mjs
@@ -0,0 +1,55 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+
+import {
+  summarizeServiceSnapshotForSentinel,
+  summarizeServiceState,
+} from '../src/core/service-snapshot-summary.mjs';
+
+test('sentinel snapshot summary keeps trade-executor health fields and drops retained command maps', () => {
+  const summary = summarizeServiceSnapshotForSentinel({
+    service: 'trade-executor',
+    label: 'Trade Executor',
+    base_url: 'http://trade-executor',
+    reachable: true,
+    health: { ok: true },
+    state: {
+      service: 'trade-executor',
+      namespace: 'unrip',
+      paused: false,
+      armed: true,
+      relay: { connected: true, last_message_at: '2026-05-06T15:00:00.000Z' },
+      last_result: { status: 'submitted' },
+      submitted_count: 100,
+      processed_idempotency_keys: Object.fromEntries(Array.from({ length: 100 }, (_, index) => [`quote:${index}`, true])),
+      submitted_commands: {
+        'cmd-1': { quote_id: 'quote-1', raw_response: { large: true } },
+      },
+    },
+  });
+
+  assert.equal(summary.state.armed, true);
+  assert.deepEqual(summary.state.relay, { connected: true, last_message_at: '2026-05-06T15:00:00.000Z' });
+  assert.equal(summary.state.processed_idempotency_keys, undefined);
+  assert.equal(summary.state.submitted_commands, undefined);
+});
+
+test('sentinel snapshot summary keeps near-intents ingest truth fields', () => {
+  const state = summarizeServiceState('near-intents-ingest', {
+    service: 'near-intents-ingest',
+    namespace: 'unrip',
+    pair_filter: { pair: 'btc->eure' },
+    ingest: {
+      connected: true,
+      last_message_at: '2026-05-06T15:00:00.000Z',
+      last_matching_quote_at: '2026-05-06T09:56:42.742Z',
+      last_published_at: '2026-05-06T09:56:42.744Z',
+      filtered_count: 10,
+    },
+    bulky_unused_field: Object.fromEntries(Array.from({ length: 100 }, (_, index) => [index, index])),
+  });
+
+  assert.equal(state.ingest.connected, true);
+  assert.equal(state.ingest.last_matching_quote_at, '2026-05-06T09:56:42.742Z');
+  assert.equal(state.bulky_unused_field, undefined);
+});