fix(hooks): honor silent_save when stop_hook_active is set

Claude Code 2.1.114 passes stop_hook_active:true on every Stop fire
after the first in a session (plugin-dispatched hooks in particular).
The legacy guard at line 426 was written for block-mode, where a
re-fire with the flag set meant "you already blocked, don't block
again" — correct loop prevention when the hook returns
{"decision":"block"}.

Silent-save mode (default since #673) never blocks — it saves
directly and returns. The flag is meaningless there, so the old
guard was suppressing every auto-save after the first one in a
Claude Code session. Symptom: terminal never shows the "✦ N
memories woven" notification again, hook.log stays silent, save
marker stuck.

Fix: only skip on stop_hook_active when block mode is configured.
Silent mode runs through as normal — the save is deterministic and
idempotent, no loop risk.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

mempalace/hooks_cli.py

@@ -209,10 +209,19 @@ def hook_stop(data: dict, harness: str):
     stop_hook_active = parsed["stop_hook_active"]
     transcript_path = parsed["transcript_path"]
 
-    # If already in a save cycle, let through (infinite-loop prevention)
+    # If already in a block-mode save cycle, let through (infinite-loop prevention).
+    # Silent mode saves directly without returning {"decision":"block"}, so there's
+    # no loop to prevent — and Claude Code's plugin dispatch sets this flag on every
+    # fire after the first, which would otherwise suppress all subsequent auto-saves.
     if str(stop_hook_active).lower() in ("true", "1", "yes"):
-        _output({})
-        return
+        try:
+            from .config import MempalaceConfig
+            silent_guard = MempalaceConfig().hook_silent_save
+        except Exception:
+            silent_guard = True
+        if not silent_guard:
+            _output({})
+            return
 
     # Count human messages
     exchange_count = _count_human_messages(transcript_path)