fix: integrate token tracker with orchestrator (#634)

- Add log_token_usage() to record input/output tokens per task
- Add Huey SIGNAL_COMPLETE hook for automatic logging
- Auto-detect pipeline name from task function name
- Append to ~/.hermes/token_usage.jsonl for downstream analysis

Related: #622 (token budget tracker)

orchestration.py

@@ -1,6 +1,53 @@
 """Sovereign orchestration — Huey replaces 3,843 lines of homebrew."""
 
-from huey import SqliteHuey, crontab
+import json
+import os
+from datetime import datetime, timezone
 from pathlib import Path
 
+from huey import SqliteHuey, signals
+
 huey = SqliteHuey(filename=str(Path.home() / ".hermes" / "orchestration.db"))
+
+# === Token Tracking ===
+TOKEN_LOG = Path.home() / ".hermes" / "token_usage.jsonl"
+
+
+def log_token_usage(task_name, result):
+    """Log token usage from a completed pipeline task.
+    
+    Reads input_tokens/output_tokens from the agent result dict.
+    Auto-detects pipeline name from task context.
+    Appends to JSONL for downstream analysis.
+    """
+    if not isinstance(result, dict):
+        return
+    
+    input_tokens = result.get("input_tokens", 0)
+    output_tokens = result.get("output_tokens", 0)
+    
+    if input_tokens == 0 and output_tokens == 0:
+        return
+    
+    # Auto-detect pipeline name from task function name
+    pipeline = task_name.replace("_task", "").replace("_", "-")
+    
+    entry = {
+        "timestamp": datetime.now(timezone.utc).isoformat(),
+        "pipeline": pipeline,
+        "input_tokens": input_tokens,
+        "output_tokens": output_tokens,
+        "total_tokens": input_tokens + output_tokens,
+        "task": task_name,
+    }
+    
+    TOKEN_LOG.parent.mkdir(parents=True, exist_ok=True)
+    with open(TOKEN_LOG, "a") as f:
+        f.write(json.dumps(entry) + "\n")
+
+
+@huey.signal(signals.SIGNAL_COMPLETE)
+def on_task_complete(signal, task, task_value=None, **kwargs):
+    """Huey hook: log token usage after each pipeline task completes."""
+    task_name = getattr(task, "name", "unknown")
+    log_token_usage(task_name, task_value)