fix: improve Steward delegation instructions for Librarian

- Update Librarian capability description to highlight CREATE/UPDATE/SEARCH
- Add specific Steward guidelines for wiki creation, updates, and research
- Add dynamic time injection to user prompts for temporal awareness
- Expand domains to include 'create', 'write', 'update'
- Update test to match new capability description

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/core/preprocessing.py

@@ -4,6 +4,7 @@ Request preprocessing pipeline.
 Analyzes requests via the Steward and creates scoped toolsets for Tatlock.
 """
 from dataclasses import dataclass
+from datetime import datetime
 from typing import Any, Optional
 
 from src.agents.steward import analyze_request, format_steward_note
@@ -14,6 +15,23 @@ from src.core.logging_config import get_logger
 logger = get_logger(__name__)
 
 
+def _inject_temporal_context(request: str) -> str:
+    """
+    Append current time context to user request.
+
+    Provides Tatlock with temporal awareness for time-sensitive queries.
+
+    Args:
+        request: Original user request
+
+    Returns:
+        Request with appended time context
+    """
+    now = datetime.now()
+    time_str = now.strftime("%Y-%m-%d %H:%M")
+    return f"{request}\n\n[Current time: {time_str}]"
+
+
 @dataclass
 class EnrichedRequest:
     """
@@ -65,6 +83,9 @@ async def preprocess_request(
         >>> print(len(enriched.scoped_tools))
         5  # All tatlock_core tools
     """
+    # Inject temporal context for time-aware processing
+    enriched_request = _inject_temporal_context(user_request)
+
     logger.info(
         "preprocessing_request",
         request_preview=user_request[:100],
@@ -74,7 +95,7 @@ async def preprocess_request(
 
     # Call Steward with full conversation history
     recommendation = await analyze_request(
-        user_request,
+        enriched_request,
         conversation_history=conversation_history,
         conversation_id=conversation_id,
     )
@@ -97,7 +118,7 @@ async def preprocess_request(
     )
 
     return EnrichedRequest(
-        original_request=user_request,
+        original_request=enriched_request,
         steward_note=steward_note,
         scoped_tools=scoped_tools,
         recommendation=recommendation,