diff --git a/src/audit.py b/src/audit.py
index 6880973..882d969 100644
--- a/src/audit.py
+++ b/src/audit.py
@@ -55,17 +55,19 @@ _LOG_PATH: Path | None = None
 _SESSION_ID: str | None = None
 _SESSION_STARTED: bool = False
 
-# RESTORED kill switch — the async-writer redesign still triggers the
-# blank-pages symptom on the user's machine despite no synchronous
-# file I/O on the request path. Cause is not yet identified; keep all
-# log_* calls as no-ops by default while we diagnose.
+# Kill switch — held off by default now that the blank-pages symptom
+# is traced to the audit_log_path/_session_id deadlock fixed in
+# a8ff8f4. End-to-end validation in session cf2ebbd5 (2026-05-19)
+# wrote session/upload/analyze/nav/session-end events with no
+# regression. Flip back to ``True`` if the symptom recurs; the env
+# vars below stay as escape hatches.
 #
-# Diagnostic overrides for an instrumented run (DO NOT set in prod):
-#   DATATOOLS_AUDIT_ENABLED=1  — bypass _DISABLED for one session
+# Env-var overrides (still wired):
+#   DATATOOLS_AUDIT_ENABLED=1  — force-on even if _DISABLED is True
 #   DATATOOLS_AUDIT_TRACE=1    — print "[audit] ..." lines to stderr
 #   DATATOOLS_AUDIT_PROBE=...  — bisect the producer path. Values:
 #     full (default) | noop | no-events | no-page-open | no-session-start
-_DISABLED: bool = True
+_DISABLED: bool = False
 _ENABLE_OVERRIDE: bool = os.environ.get("DATATOOLS_AUDIT_ENABLED") == "1"
 _TRACE: bool = os.environ.get("DATATOOLS_AUDIT_TRACE") == "1"
 _PROBE: str = os.environ.get("DATATOOLS_AUDIT_PROBE", "full").lower()