fix(compression): default in_place to True to match DEFAULT_CONFIG

is_truthy_value(..., default=False) and getattr(..., False) disagreed with
compression.in_place: true from #38763, so partial/failed config loads fell
back into rotation mode and re-armed the pre-lease drift path. Also report
compression.in_place in hermes dump overrides so stale false values are visible.

agent/agent_init.py

@@ -1952,8 +1952,12 @@ def init_agent(
     # parent_session_id chain, no `name #N` renumber). See #38763 and
     # agent/conversation_compression.py. Consumed by compress_context(), not the
     # compressor, so it rides on the agent.
+    # Default True must match DEFAULT_CONFIG["compression"]["in_place"]
+    # (#38763). default=False here previously flipped agents into rotation
+    # mode whenever the merged config omitted the key (partial configs,
+    # load_config failure → {}), re-arming the pre-lease drift abort.
     compression_in_place = is_truthy_value(
-        _compression_cfg.get("in_place"), default=False
+        _compression_cfg.get("in_place"), default=True
     )
     codex_app_server_auto_compaction = str(
         _compression_cfg.get("codex_app_server_auto", "native") or "native"

hermes_cli/dump.py

@@ -243,6 +243,7 @@ def _config_overrides(config: dict) -> dict[str, str]:
         ("browser", "allow_private_urls"),
         ("compression", "enabled"),
         ("compression", "threshold"),
+        ("compression", "in_place"),
         ("display", "streaming"),
         ("display", "skin"),
         ("display", "show_reasoning"),