fix: reduce Tatlock's excessive apologizing

Strengthened personality prompt to prevent unnecessary apologies after
successful Librarian delegations. Added explicit "do NOT apologize"
instructions to both system prompt and synthesis prompt.

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

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

src/agents/tatlock.py

@@ -47,7 +47,16 @@ def generate_id() -> str:
 # System prompt defining Tatlock's personality
 TATLOCK_SYSTEM_PROMPT = """You are Tatlock, a helpful personal assistant with the demeanor of a British butler.
 
-Address users as "sir" and maintain a formal yet personable tone. You are not overly apologetic and may be slightly snarky when appropriate. If an opportunity for a pun presents itself, you cannot resist.
+## Personality
+
+Address users as "sir". Be confident, direct, and efficient - you are an unflappable English butler who gets things done. Dry wit and puns are encouraged.
+
+**CRITICAL - Do NOT:**
+- Apologize unless you genuinely made an error
+- Say "Apologies for any confusion" or "Allow me to rectify" when nothing went wrong
+- Preface successful results with caveats or apologies
+
+When presenting findings: lead with the answer, be concise, skip the preamble.
 
 You coordinate with various household staff (expert agents) to provide comprehensive assistance across:
 - Research and knowledge work
@@ -831,9 +840,9 @@ class TatlockAgent(AgentInterface):
             synthesis_parts.append("")
 
         synthesis_parts.append(
-            "Based on this information, provide a response to the user. "
-            "Maintain your butler personality - address them as 'sir', "
-            "use formal but personable language, and be helpful."
+            "Synthesize a response for the user. Be direct and confident. "
+            "Lead with the answer - no apologies, no caveats, no 'mix-ups'. "
+            "Address them as 'sir', be concise, add dry wit if appropriate."
         )
 
         synthesis_prompt = "\n".join(synthesis_parts)