diff --git a/apps/api/src/services/public_redaction.py b/apps/api/src/services/public_redaction.py
index eee0d614..581c15b2 100644
--- a/apps/api/src/services/public_redaction.py
+++ b/apps/api/src/services/public_redaction.py
@@ -38,6 +38,14 @@ _HOST_ALIASES = {
 
 _PRIVATE_LAN_RE = re.compile(r"192\.168\.0\.\d{1,3}(?::\d{1,5})?")
 
+_WORK_CONTEXT_REPLACEMENTS = {
+    "工作視窗": "內部協作環境",
+    "批准！繼續": "內部短訊指令",
+    "批准！": "內部短訊指令",
+    "source_thread_id": "redacted_thread_id",
+    "codex_delegation": "redacted_delegation",
+}
+
 
 def redact_public_lan_text(value: str) -> str:
     """Replace internal LAN addresses with public-safe asset aliases."""
@@ -52,7 +60,10 @@ def redact_public_lan_text(value: str) -> str:
         redacted = redacted.replace(f"https://{host}", alias)
         redacted = redacted.replace(host, alias)
 
-    return _PRIVATE_LAN_RE.sub("host:internal-node", redacted)
+    redacted = _PRIVATE_LAN_RE.sub("host:internal-node", redacted)
+    for phrase, replacement in _WORK_CONTEXT_REPLACEMENTS.items():
+        redacted = redacted.replace(phrase, replacement)
+    return redacted
 
 
 def redact_public_lan_topology(value: Any) -> Any:
diff --git a/apps/api/tests/test_public_redaction.py b/apps/api/tests/test_public_redaction.py
index b84ce919..afd8e815 100644
--- a/apps/api/tests/test_public_redaction.py
+++ b/apps/api/tests/test_public_redaction.py
@@ -33,6 +33,15 @@ def test_redact_public_lan_topology_recurses_json_values() -> None:
     assert redacted["nested"][0]["endpoint"] == "host:observability-a/signoz"
 
 
+def test_redact_public_lan_text_replaces_internal_work_context_terms() -> None:
+    redacted = redact_public_lan_text("不得顯示工作視窗對話、批准！繼續 或 source_thread_id")
+
+    assert "工作視窗" not in redacted
+    assert "批准！" not in redacted
+    assert "source_thread_id" not in redacted
+    assert "內部協作環境" in redacted
+
+
 def test_public_monitoring_tool_payload_drops_internal_probe_url() -> None:
     payload = public_monitoring_tool_payload(
         {