rehearsal 2026-10-20: night log copier added before the night (read-only)

documentation/audits/rehearsal-2026-10-20/B5-night/00-expected.txt

@@ -24,3 +24,7 @@ Baseline taken 20:59–21:09 UTC (before the night, read-only, through the apps'
 (tool `tools/snapshot.py`). The morning snapshot must equal it line for line. The four known Nextcloud gaps are from
 the day (the 1.5 GB upload that never finished, a symlink WebDAV cannot hold, the NFC/NFD pair Nextcloud folds into one
 name) and the four 0-byte `feltoltes_*.jpg` are R-1196.
+
+Added 21:39 UTC, before the night: a THIRD passive reader, `tools/logwatch.py` — every 10 min it copies the box's own
+log ring (the „Hibakeresés" page's data: controller INFO+ and the host agent's lines) off the box, because a restart
+erases it. Read-only, like the other two. The copies are scanned for secrets before they are committed.

documentation/audits/rehearsal-2026-10-20/tools/logwatch.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+"""logwatch.py OUTDIR — every 10 min, copy the box's own log ring (the „Hibakeresés" page's data: controller INFO+ and
+the host agent's lines) and append the NEW lines to OUTDIR/controller.log and OUTDIR/agent.log. Read-only. A night
+restart erases the ring; this keeps the night's evidence off the box (rule 5). Run under sec (dashboard password)."""
+import json, os, sys, time
+sys.path.insert(0, os.path.dirname(os.path.abspath(__file__))); import ctl
+out = sys.argv[1]; os.makedirs(out, exist_ok=True)
+seen = {"c": set(), "a": set()}
+while True:
+    for key, path, fn in (("c", "/api/debug/logs?level=INFO", "controller.log"), ("a", "/api/debug/agent-logs", "agent.log")):
+        try:
+            c, d = ctl.call("GET", path, timeout=60)
+            new = 0
+            with open(os.path.join(out, fn), "a") as f:
+                for e in (d.get("data") or {}).get("entries") or []:
+                    k = (e.get("timestamp"), e.get("message"))
+                    if k not in seen[key]:
+                        seen[key].add(k); new += 1
+                        f.write(f"{e.get('timestamp')} {e.get('level')} {e.get('message')}\n")
+            print(time.strftime("%H:%M:%SZ", time.gmtime()), fn, "http", c, "new", new, flush=True)
+        except Exception as ex:  # noqa: BLE001
+            print(time.strftime("%H:%M:%SZ", time.gmtime()), fn, "NO ANSWER", type(ex).__name__, flush=True)
+    time.sleep(600)