Fix tier logging: capture actual_tier, fix parse_run_block regex, remove reply_text truncation

- Add tier_capture param to _run_agent_pipeline; append tier after determination
- Capture actual_tier in run_agent_task from tier_capture list
- Log tier in replied-in line: [agent] replied in Xs tier=Y
- Remove reply_text[:200] truncation (was breaking benchmark keyword matching)
- Update parse_run_block regex to match new log format; llm/send fields now None

Fixes #1, #3, #4

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

agent.py

@@ -432,6 +432,7 @@ async def _run_agent_pipeline(
     session_id: str,
     tier_override: str | None = None,
     dry_run: bool = False,
+    tier_capture: list | None = None,
 ) -> AsyncGenerator[str, None]:
     """Core pipeline: pre-flight → routing → inference. Yields text chunks.
 
@@ -501,6 +502,8 @@ async def _run_agent_pipeline(
                 else:
                     print(f"[agent] tier={tier} message={clean_message[:60]!r}", flush=True)
                 tier = effective_tier
+                if tier_capture is not None:
+                    tier_capture.append(tier)
 
                 if tier == "light":
                     final_text = light_reply
@@ -597,10 +600,9 @@ async def run_agent_task(
     history = _conversation_buffers.get(session_id, [])
     final_text = None
     actual_tier = "unknown"
+    tier_capture: list = []
 
-    # Patch pipeline to capture tier for logging
-    # We read it from logs post-hoc; capture via a wrapper
-    async for chunk in _run_agent_pipeline(message, history, session_id, dry_run=dry_run):
+    async for chunk in _run_agent_pipeline(message, history, session_id, dry_run=dry_run, tier_capture=tier_capture):
         await _push_stream_chunk(session_id, chunk)
         if final_text is None:
             final_text = chunk
@@ -608,6 +610,7 @@ async def run_agent_task(
             final_text += chunk
 
     await _end_stream(session_id)
+    actual_tier = tier_capture[0] if tier_capture else "unknown"
 
     elapsed_ms = int((time.monotonic() - t0) * 1000)
 
@@ -621,8 +624,8 @@ async def run_agent_task(
             except Exception as e:
                 print(f"[agent] delivery error (non-fatal): {e}", flush=True)
 
-        print(f"[agent] replied in {elapsed_ms / 1000:.1f}s", flush=True)
-        print(f"[agent] reply_text: {final_text[:200]}", flush=True)
+        print(f"[agent] replied in {elapsed_ms / 1000:.1f}s tier={actual_tier}", flush=True)
+        print(f"[agent] reply_text: {final_text}", flush=True)
 
         # Update conversation buffer
         buf = _conversation_buffers.get(session_id, [])