fix: add wing param to diary_write/diary_read, derive from transcript path (#659)

* fix: add wing param to diary_write/diary_read, derive from transcript path

Without a wing override, all diary entries from the stop hook land in
wing_session-hook regardless of which project the session is in, making
per-project diary search impossible.

- tool_diary_write(): add optional `wing` param; sanitize and use it when
  provided, fall back to wing_{agent_name} when omitted
- tool_diary_read(): add optional `wing` param for filtering by target wing
- TOOLS dict: expose `wing` in input_schema for both diary tools
- hooks_cli: add _wing_from_transcript_path() helper that extracts the
  project name from Claude Code paths like
  ~/.claude/projects/-home-jp-Projects-kiyo-xhci-fix/... → kiyo-xhci-fix
- hook_stop: derive project wing and append wing= hint to block reason so
  Claude writes diary entries to the correct per-project wing

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix: sanitize wing param, cross-platform paths, tighten test assertions

Addresses Copilot review feedback on #659.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: wing_ prefix + agent filter on diary_read

Addresses bensig's 2-issue review on this PR.

1. _wing_from_transcript_path() was returning bare project names
   (e.g. "myproject") while all existing wings follow the wing_*
   convention from AAAK_SPEC. Entries landed in wing="myproject"
   while diary_read defaulted to wing="wing_<agent_name>" —
   orphaning every diary entry written by the stop hook. Now
   returns "wing_<project>" and falls back to "wing_sessions".

2. tool_diary_read() did not include agent_name in the ChromaDB
   where filter when a custom wing was provided — any caller with
   a shared wing could read entries written by other agents.
   Add {"agent": agent_name} to the $and clause. Also flagged by
   Qudo and left unresolved until now.

Tests updated to expect the wing_ prefix (6 tests).

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

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

mempalace/mcp_server.py

@@ -918,10 +918,10 @@ def tool_kg_stats():
 # ==================== AGENT DIARY ====================
 
 
-def tool_diary_write(agent_name: str, entry: str, topic: str = "general"):
+def tool_diary_write(agent_name: str, entry: str, topic: str = "general", wing: str = ""):
     """
-    Write a diary entry for this agent. Each agent gets its own wing
-    with a diary room. Entries are timestamped and accumulate over time.
+    Write a diary entry for this agent. Entries are timestamped and
+    accumulate over time in a diary room.
 
     This is the agent's personal journal — observations, thoughts,
     what it worked on, what it noticed, what it thinks matters.
@@ -932,7 +932,10 @@ def tool_diary_write(agent_name: str, entry: str, topic: str = "general"):
     except ValueError as e:
         return {"success": False, "error": str(e)}
 
-    wing = f"wing_{agent_name.lower().replace(' ', '_')}"
+    if wing:
+        wing = sanitize_name(wing)
+    else:
+        wing = f"wing_{agent_name.lower().replace(' ', '_')}"
     room = "diary"
     col = _get_collection(create=True)
     if not col:
@@ -987,24 +990,38 @@ def tool_diary_write(agent_name: str, entry: str, topic: str = "general"):
         return {"success": False, "error": str(e)}
 
 
-def tool_diary_read(agent_name: str, last_n: int = 10):
+def tool_diary_read(agent_name: str, last_n: int = 10, wing: str = ""):
     """
     Read an agent's recent diary entries. Returns the last N entries
     in chronological order — the agent's personal journal.
+
+    When ``wing`` is provided, reads from that wing instead of the
+    agent's default ``wing_<agent_name>`` wing.  This lets hooks
+    direct diary reads to a project-specific wing derived from
+    the transcript path.
     """
     try:
         agent_name = sanitize_name(agent_name, "agent_name")
+        if wing:
+            wing = sanitize_name(wing)
     except ValueError as e:
         return {"error": str(e)}
     last_n = max(1, min(last_n, 100))
-    wing = f"wing_{agent_name.lower().replace(' ', '_')}"
+    if not wing:
+        wing = f"wing_{agent_name.lower().replace(' ', '_')}"
     col = _get_collection()
     if not col:
         return _no_palace()
 
     try:
         results = col.get(
-            where={"$and": [{"wing": wing}, {"room": "diary"}]},
+            where={
+                "$and": [
+                    {"wing": wing},
+                    {"room": "diary"},
+                    {"agent": agent_name},
+                ]
+            },
             include=["documents", "metadatas"],
             limit=10000,
         )
@@ -1497,6 +1514,10 @@ TOOLS = {
                     "type": "string",
                     "description": "Topic tag (optional, default: general)",
                 },
+                "wing": {
+                    "type": "string",
+                    "description": "Target wing for this diary entry (optional). If omitted, uses wing_{agent_name}. Use this to write diary entries to a project wing instead of an agent-specific wing.",
+                },
             },
             "required": ["agent_name", "entry"],
         },
@@ -1515,6 +1536,10 @@ TOOLS = {
                     "type": "integer",
                     "description": "Number of recent entries to read (default: 10)",
                 },
+                "wing": {
+                    "type": "string",
+                    "description": "Wing to read diary entries from (optional). If omitted, reads from wing_{agent_name}.",
+                },
             },
             "required": ["agent_name"],
         },