Fewer false operator pages. OpenVibeDeployDrift reads max_over_time(openvibe_deploy_drift_seconds[2h]): a Network restart drops the series for about a minute, which reset the rule's for: 1h and made the alert resolve and fire again every few hours (2026-09-28). browser-watch checks a failed release again after 30 minutes instead of keeping it red until the next release or day, so a transient failure clears on its own; a pass still holds for a day.

ddiff --git a/deploy/prometheus/openvibe-rules.yml b/deploy/prometheus/openvibe-rules.yml
iindex 8084a62..7947071 100644
---- a/deploy/prometheus/openvibe-rules.yml
++++ b/deploy/prometheus/openvibe-rules.yml
@@@ -47,8 +47,10 @@ groups:
          annotations:
            summary: "No successful nightly backup for more than 30 hours (or no backup metrics at all)"
        # Production drift (OpenVibe.Network registry/deploy-drift.js, hourly against GitHub; WS-S task 7).
++      # max_over_time: Network restarts drop the series for a minute, which reset `for` and made the alert
++      # resolve and fire again every few hours (2026-09-28). Documentation-only drift is not counted.
        - alert: OpenVibeDeployDrift
--        expr: openvibe_deploy_drift_seconds > 24 * 3600
++        expr: max_over_time(openvibe_deploy_drift_seconds[2h]) > 24 * 3600
          for: 1h
          labels: { severity: ticket }
          annotations:
ddiff --git a/lib/browser-watch.js b/lib/browser-watch.js
iindex e86485c..257aea9 100644
---- a/lib/browser-watch.js
++++ b/lib/browser-watch.js
@@@ -25,6 +25,7 @@
  const path = require('path');
  const { runBrowserCheck } = require('./browser-check-hook');
  
++const RECHECK_FAILED_MS = 30 * 60 * 1000;
  const DAY_MS = 24 * 3600 * 1000;
  const SETTLE_MS = 3 * 60 * 1000;        // a release is checked once its process has run this long
  const RETRY_DELAY_MS = 60 * 1000;      // before the confirming second run
@@@ -137,7 +138,8 @@ async function watch(ctx, { sites = ['live'], force = false, asUser = 'ovcheck',
          const file = path.join(stateDir, `${site}.json`);
          let prev = null;
          try { prev = JSON.parse((await exec.readFile(file)) || 'null'); } catch { prev = null; }
--        const fresh = prev && prev.release === release && now - Date.parse(prev.checkedAt) < DAY_MS;
++        // A pass holds for a day; a failure is checked again after 30 minutes, so a transient one clears itself.
++        const fresh = prev && prev.release === release && now - Date.parse(prev.checkedAt) < (prev.ok ? DAY_MS : RECHECK_FAILED_MS);
          if (fresh && !force) { out.push({ site, release, action: 'skipped', ok: prev.ok, reason: 'this release was checked' }); continue; }
          let r = null;
          let reports = null;
@@@ -157,4 +159,4 @@ async function watch(ctx, { sites = ['live'], force = false, asUser = 'ovcheck',
      return { sites: out };
  }
  
--module.exports = { watch, failingChecks, failureDetails, writeMetrics, originOf, currentRelease, DAY_MS, SETTLE_MS };
++module.exports = { watch, failingChecks, failureDetails, writeMetrics, originOf, currentRelease, DAY_MS, SETTLE_MS, RECHECK_FAILED_MS };
ddiff --git a/test/browser-watch.test.js b/test/browser-watch.test.js
iindex baa22fd..03fdedd 100644
---- a/test/browser-watch.test.js
++++ b/test/browser-watch.test.js
@@@ -62,6 +62,13 @@ runTests([
              { route: '/', check: 'errors', width: 390, message: 'WebSocket closed' },
              { route: '/', check: 'overflow', width: 390, offenders: ['.wide'] },
          ], 'what failed is kept for the operator');
++        // The same failed release: left alone for 30 minutes, then checked again (a transient failure clears itself).
++        const t0 = Date.parse(st.checkedAt);
++        r = await watch(host.ctx(), { retryDelayMs: 0, check: host.check, now: t0 + 10 * 60000 });
++        assert.deepStrictEqual([r.sites[0].action, host.runs.length], ['skipped', 2]);
++        host.answers.push({ code: 0, reports: pass });
++        r = await watch(host.ctx(), { retryDelayMs: 0, check: host.check, now: t0 + 31 * 60000 });
++        assert.deepStrictEqual([r.sites[0].action, r.sites[0].ok, host.runs.length], ['checked', true, 3]);
          host = site();
          host.answers.push({ code: 1, reports: fail }, { code: 0, reports: pass });
          r = await watch(host.ctx(), { retryDelayMs: 0, check: host.check });