diff --git a/gateway/run.py b/gateway/run.py
index 8c162f7dc9a46..14d762461d817 100644
--- a/gateway/run.py
+++ b/gateway/run.py
@@ -47,16 +47,6 @@
 from typing import Awaitable, Callable, Dict, Optional, Any, List, Tuple, Union, cast
 
 from agent.async_utils import consume_detached_task_result, safe_schedule_threadsafe
-from agent.conversation_compression import (
-    COMPACTION_STATUS,
-    COMPRESSION_RETRY_CONTEXT_REDUCED_STATUS_TEMPLATE,
-    COMPRESSION_RETRY_MESSAGES_STATUS_TEMPLATE,
-    COMPRESSION_RETRY_TOKENS_STATUS_TEMPLATE,
-    COMPRESSION_RETRY_TOO_LARGE_STATUS_TEMPLATE,
-    IDLE_COMPACTION_STATUS_TEMPLATE,
-    PRE_API_COMPRESSION_STATUS_TEMPLATE,
-    PREFLIGHT_COMPRESSION_STATUS_TEMPLATE,
-)
 from agent.conversation_loop import INTERRUPT_WAITING_FOR_MODEL_PREFIX
 from agent.i18n import t
 from agent.interrupt_compat import request_hard_interrupt
@@ -142,43 +132,10 @@ def _record_hygiene_cooldown(gateway, session_id: str, cooldown_seconds: float)
         logger.debug("session hygiene cooldown persist failed: %s", exc)
 
 
-def _status_template_to_regex(template: str) -> str:
-    """Compile a compression status template constant into a regex source.
-
-    Literal text is escaped verbatim (so wording drift in
-    agent/conversation_compression.py cannot silently diverge from this
-    matcher — the constants ARE the wording) and each ``{field}`` format
-    placeholder is replaced with a numeric-ish pattern covering every value
-    the emit sites format in (ints, ``{:,}`` thousands separators).
-    """
-    parts = re.split(r"\{[^{}]*\}", template)
-    return r"[\d,]+".join(re.escape(part) for part in parts)
-
-
-# ROUTINE compression progress statuses, derived from the SAME template
-# constants the emit sites format (agent/conversation_compression.py, #69550)
-# — never re-inlined wording. Used ONLY by the opt-in
-# ``compression.progress_notices`` gate below (#52995) to decide which of the
-# noisy statuses matched by _TELEGRAM_NOISY_STATUS_RE are compression
-# progress (deliverable when the user opted in) versus unrelated aux/retry
-# chatter (always suppressed on chat surfaces). Failure notices and manual
-# /compress feedback never match _TELEGRAM_NOISY_STATUS_RE in the first
-# place, so they are unaffected by this gate.
-_COMPRESSION_PROGRESS_STATUS_RE = re.compile(
-    "|".join(
-        _status_template_to_regex(_template)
-        for _template in (
-            COMPACTION_STATUS,
-            PRE_API_COMPRESSION_STATUS_TEMPLATE,
-            PREFLIGHT_COMPRESSION_STATUS_TEMPLATE,
-            IDLE_COMPACTION_STATUS_TEMPLATE,
-            COMPRESSION_RETRY_TOO_LARGE_STATUS_TEMPLATE,
-            COMPRESSION_RETRY_MESSAGES_STATUS_TEMPLATE,
-            COMPRESSION_RETRY_TOKENS_STATUS_TEMPLATE,
-            COMPRESSION_RETRY_CONTEXT_REDUCED_STATUS_TEMPLATE,
-        )
-    ),
-    re.IGNORECASE,
+# --- Compression-status helpers (extracted to gateway.status_helpers) ---
+from gateway.status_helpers import (  # noqa: E402
+    _COMPRESSION_PROGRESS_STATUS_RE,
+    _status_template_to_regex,
 )
 
 
diff --git a/gateway/status_helpers.py b/gateway/status_helpers.py
new file mode 100644
index 0000000000000..7f7af8336a111
--- /dev/null
+++ b/gateway/status_helpers.py
@@ -0,0 +1,63 @@
+"""Compression-status helpers extracted from gateway/run.py (#54962).
+
+Fourth slice of the gateway god-file unpacking: the status-template-to-regex
+compiler and the opt-in compression-progress matcher. Pure derivation — the
+regex is built from the SAME template constants the emit sites format, so
+wording drift between agent/conversation_compression.py and the gateway
+matcher cannot silently diverge.
+"""
+
+from __future__ import annotations
+
+import re
+
+from agent.conversation_compression import (
+    COMPACTION_STATUS,
+    COMPRESSION_RETRY_CONTEXT_REDUCED_STATUS_TEMPLATE,
+    COMPRESSION_RETRY_MESSAGES_STATUS_TEMPLATE,
+    COMPRESSION_RETRY_TOKENS_STATUS_TEMPLATE,
+    COMPRESSION_RETRY_TOO_LARGE_STATUS_TEMPLATE,
+    IDLE_COMPACTION_STATUS_TEMPLATE,
+    PREFLIGHT_COMPRESSION_STATUS_TEMPLATE,
+    PRE_API_COMPRESSION_STATUS_TEMPLATE,
+)
+
+
+def _status_template_to_regex(template: str) -> str:
+    """Compile a compression status template constant into a regex source.
+
+    Literal text is escaped verbatim (so wording drift in
+    agent/conversation_compression.py cannot silently diverge from this
+    matcher — the constants ARE the wording) and each ``{field}`` format
+    placeholder is replaced with a numeric-ish pattern covering every value
+    the emit sites format in (ints, ``{:,}`` thousands separators).
+    """
+    parts = re.split(r"\{[^{}]*\}", template)
+    return r"[\d,]+".join(re.escape(part) for part in parts)
+
+
+# ROUTINE compression progress statuses, derived from the SAME template
+# constants the emit sites format (agent/conversation_compression.py, #69550)
+# — never re-inlined wording. Used ONLY by the opt-in
+# ``compression.progress_notices`` gate below (#52995) to decide which of the
+# noisy statuses matched by _TELEGRAM_NOISY_STATUS_RE are compression
+# progress (deliverable when the user opted in) versus unrelated aux/retry
+# chatter (always suppressed on chat surfaces). Failure notices and manual
+# /compress feedback never match _TELEGRAM_NOISY_STATUS_RE in the first
+# place, so they are unaffected by this gate.
+_COMPRESSION_PROGRESS_STATUS_RE = re.compile(
+    "|".join(
+        _status_template_to_regex(_template)
+        for _template in (
+            COMPACTION_STATUS,
+            PRE_API_COMPRESSION_STATUS_TEMPLATE,
+            PREFLIGHT_COMPRESSION_STATUS_TEMPLATE,
+            IDLE_COMPACTION_STATUS_TEMPLATE,
+            COMPRESSION_RETRY_TOO_LARGE_STATUS_TEMPLATE,
+            COMPRESSION_RETRY_MESSAGES_STATUS_TEMPLATE,
+            COMPRESSION_RETRY_TOKENS_STATUS_TEMPLATE,
+            COMPRESSION_RETRY_CONTEXT_REDUCED_STATUS_TEMPLATE,
+        )
+    ),
+    re.IGNORECASE,
+)