From b86367e49697d26456a6b0c13bf8a938f44f8e8b Mon Sep 17 00:00:00 2001
From: Ethan <23321960+0xLeathery@users.noreply.github.com>
Date: Fri, 3 Jul 2026 17:00:42 +1000
Subject: [PATCH] fix: signal lock-hold to callers when compression skips

---
 agent/conversation_compression.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/agent/conversation_compression.py b/agent/conversation_compression.py
index b7b3af882804..8360b46e892f 100644
--- a/agent/conversation_compression.py
+++ b/agent/conversation_compression.py
@@ -1370,6 +1370,11 @@ def compress_context(
                 _lock_sid, existing,
             )
             _lock_holder = None  # don't release a lock we don't own
+            # Signal to callers that this no-op is due to a concurrent lock,
+            # not a genuine "nothing to compress" or aux-model failure.
+            # Manual /compress callers can surface a clear status message
+            # instead of the misleading "No changes from compression" text.
+            agent._compression_skipped_due_to_lock = existing or True
             # Surface to the user once — quiet for downstream auto-compress loops
             if getattr(agent, "_last_compression_lock_warning_sid", None) != _lock_sid:
                 agent._last_compression_lock_warning_sid = _lock_sid