diff --git a/Cargo.lock b/Cargo.lock
index 6ab5821..5603b67 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1652,7 +1652,7 @@ checksum = "09edd9e8b54e49e587e4f6295a7d29c3ea94d469cb40ab8ca70b288248a81db2"
 
 [[package]]
 name = "lesavka_client"
-version = "0.16.15"
+version = "0.16.16"
 dependencies = [
  "anyhow",
  "async-stream",
@@ -1686,7 +1686,7 @@ dependencies = [
 
 [[package]]
 name = "lesavka_common"
-version = "0.16.15"
+version = "0.16.16"
 dependencies = [
  "anyhow",
  "base64",
@@ -1698,7 +1698,7 @@ dependencies = [
 
 [[package]]
 name = "lesavka_server"
-version = "0.16.15"
+version = "0.16.16"
 dependencies = [
  "anyhow",
  "base64",
diff --git a/client/Cargo.toml b/client/Cargo.toml
index bad1d6e..1e3dcc8 100644
--- a/client/Cargo.toml
+++ b/client/Cargo.toml
@@ -4,7 +4,7 @@ path                    = "src/main.rs"
 
 [package]
 name                    = "lesavka_client"
-version                 = "0.16.15"
+version                 = "0.16.16"
 edition                 = "2024"
 
 [dependencies]
diff --git a/common/Cargo.toml b/common/Cargo.toml
index 75d8f34..5ac381d 100644
--- a/common/Cargo.toml
+++ b/common/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name                    = "lesavka_common"
-version                 = "0.16.15"
+version                 = "0.16.16"
 edition                 = "2024"
 build                   = "build.rs"
 
diff --git a/scripts/manual/browser_consumer_probe.py b/scripts/manual/browser_consumer_probe.py
index c45ec8d..04f8e5f 100755
--- a/scripts/manual/browser_consumer_probe.py
+++ b/scripts/manual/browser_consumer_probe.py
@@ -23,7 +23,7 @@ class ProbeState:
         self.output_path = output_path
         self.status_path = status_path
         self.duration_seconds = duration_seconds
-        self.lock = threading.Lock()
+        self.lock = threading.RLock()
         self.start_token = 0
         self.status = {
             "booted_at": time.time(),
diff --git a/scripts/manual/local_av_stimulus.py b/scripts/manual/local_av_stimulus.py
index 266a3b6..e896e88 100755
--- a/scripts/manual/local_av_stimulus.py
+++ b/scripts/manual/local_av_stimulus.py
@@ -43,7 +43,7 @@ class StimulusState:
     def __init__(self, status_path: Path, args: argparse.Namespace) -> None:
         self.status_path = status_path
         self.args = args
-        self.lock = threading.Lock()
+        self.lock = threading.RLock()
         self.start_token = 0
         self.status = {
             "booted_at": time.time(),
diff --git a/server/Cargo.toml b/server/Cargo.toml
index 3fb79f4..b322450 100644
--- a/server/Cargo.toml
+++ b/server/Cargo.toml
@@ -10,7 +10,7 @@ bench                   = false
 
 [package]
 name                    = "lesavka_server"
-version                 = "0.16.15"
+version                 = "0.16.16"
 edition                 = "2024"
 autobins                = false
 
diff --git a/testing/tests/client_manual_sync_script_contract.rs b/testing/tests/client_manual_sync_script_contract.rs
index bdcaa45..cbe8400 100644
--- a/testing/tests/client_manual_sync_script_contract.rs
+++ b/testing/tests/client_manual_sync_script_contract.rs
@@ -124,3 +124,17 @@ fn local_stimulus_matches_sync_analyzer_pulse_contract() {
         );
     }
 }
+
+#[test]
+fn manual_probe_python_servers_use_reentrant_state_locks() {
+    const BROWSER_CONSUMER: &str = include_str!("../../scripts/manual/browser_consumer_probe.py");
+    for (name, script) in [
+        ("local stimulus", LOCAL_STIMULUS),
+        ("browser consumer", BROWSER_CONSUMER),
+    ] {
+        assert!(
+            script.contains("threading.RLock()"),
+            "{name} server request handlers call snapshot while holding state lock; use RLock to avoid /start deadlocks"
+        );
+    }
+}