feat(federation): add winner tracking and token usage reporting

- Track which node won the consensus voting (local or peer name)
- Add winner to FederationResult dataclass
- Log winner in server logs
- Calculate and report token usage in federation streaming
- Fix prompt_tokens calculation in streaming path

Now opencode will show:
- Context tokens used
- Which node won the vote (in logs)

config/prompts/tool_instructions.txt

@@ -9,4 +9,6 @@ ARGUMENTS: {"url": "https://example.com", "format": "markdown"}
 
 Available tools: bash, webfetch
 
+IMPORTANT: Only webfetch URLs that actually exist and are provided by the user. NEVER hallucinate or guess URLs. If a URL returns 404, stop trying to fetch it.
+
 No explanations. No numbered lists. No markdown. Only tool calls.

src/api/routes.py

@@ -1,5 +1,6 @@
 """OpenAI-compatible API routes for Local Swarm."""
 
+import asyncio
 import json
 import logging
 import os
@@ -544,10 +545,99 @@ async def chat_completions(request: ChatCompletionRequest, fastapi_request: Requ
     completion_id = f"chatcmpl-{uuid.uuid4().hex[:12]}"
     created = int(time.time())
     
+    # Calculate prompt tokens once for usage reporting
+    prompt_tokens = len(TOKEN_ENCODING.encode(prompt))
+    
     if request.stream:
-        # For streaming with tools, return tool_calls to client (opencode) for execution
-        # This enables multi-turn conversations where client executes tools and sends results back
-        if has_tools:
+        # Check if federation is enabled with peers
+        peers_count = 0
+        if federated_swarm is not None and federated_swarm.discovery is not None:
+            peers_count = len(federated_swarm.discovery.get_peers())
+        use_federation = peers_count > 0
+        
+        if use_federation and not has_tools:
+            # Use federation - wait for ALL nodes to complete and use consensus result
+            logger.debug(f"🌐 Using federation with {peers_count} peer(s) - waiting for consensus...")
+            
+            # Run federation and get consensus result
+            fed_result = await federated_swarm.generate_with_federation(
+                prompt=prompt,
+                max_tokens=request.max_tokens or 1024,
+                temperature=request.temperature or 0.7,
+                min_peers=0
+            )
+            
+            logger.debug(f"  ✓ Federation consensus complete (strategy: {fed_result.strategy}, confidence: {fed_result.local_confidence:.2f})")
+            logger.debug(f"  🏆 Winner: {fed_result.winner} (check logs above for details)")
+            logger.debug(f"  📝 Using federated response from {len(fed_result.peer_votes) + 1} nodes")
+            
+            # Use the federated consensus result
+            content = fed_result.final_response
+            
+            # Calculate token counts
+            completion_tokens = len(TOKEN_ENCODING.encode(content)) if content else 0
+            total_tokens = prompt_tokens + completion_tokens
+            
+            # Stream the federated response
+            async def federation_stream_generator() -> AsyncIterator[str]:
+                """Generate SSE stream with federated content."""
+                # Send role chunk
+                first_chunk = ChatCompletionStreamResponse(
+                    id=completion_id,
+                    created=created,
+                    model=request.model,
+                    choices=[
+                        ChatCompletionStreamChoice(
+                            delta={"role": "assistant"}
+                        )
+                    ]
+                )
+                yield f"data: {first_chunk.model_dump_json()}\n\n"
+                
+                # Send content in chunks
+                chunk_size = 100
+                for i in range(0, len(content), chunk_size):
+                    chunk = content[i:i+chunk_size]
+                    stream_chunk = ChatCompletionStreamResponse(
+                        id=completion_id,
+                        created=created,
+                        model=request.model,
+                        choices=[
+                            ChatCompletionStreamChoice(
+                                delta={"content": chunk}
+                            )
+                        ]
+                    )
+                    yield f"data: {stream_chunk.model_dump_json()}\n\n"
+                
+                # Send final chunk with usage
+                from api.models import UsageInfo
+                final_chunk = ChatCompletionStreamResponse(
+                    id=completion_id,
+                    created=created,
+                    model=request.model,
+                    choices=[
+                        ChatCompletionStreamChoice(
+                            delta={},
+                            finish_reason="stop"
+                        )
+                    ],
+                    usage=UsageInfo(
+                        prompt_tokens=prompt_tokens,
+                        completion_tokens=completion_tokens,
+                        total_tokens=total_tokens
+                    )
+                )
+                yield f"data: {final_chunk.model_dump_json()}\n\n"
+                yield "data: [DONE]\n\n"
+            
+            return StreamingResponse(
+                federation_stream_generator(),
+                media_type="text/event-stream"
+            )
+        elif has_tools:
+            # For streaming with tools, return tool_calls to client (opencode) for execution
+            # This enables multi-turn conversations where client executes tools and sends results back
             logger.debug("  🔧 Streaming with tools - returning tool_calls to client for execution...")
             # Collect full response
             full_response = ""

src/network/federation.py

@@ -5,7 +5,7 @@ Handles communication between peer swarms for distributed consensus.
 
 import asyncio
 import time
-from typing import List, Optional, Dict, Any
+from typing import List, Optional, Dict, Any, Tuple
 from dataclasses import dataclass
 
 from network.discovery import PeerInfo
@@ -29,6 +29,7 @@ class FederationResult:
     local_confidence: float
     peer_votes: List[PeerVote]
     strategy: str
+    winner: str = ""  # Name of the winning node ("local" or peer name)
 
 
 class FederationClient:
@@ -172,6 +173,8 @@ class FederatedSwarm:
     ) -> FederationResult:
         """
         Generate with federation across peer swarms.
+        
+        Optimized: Runs local and peer generation in parallel for maximum speed.
 
         Args:
             prompt: Input prompt
@@ -182,53 +185,68 @@ class FederatedSwarm:
         Returns:
             FederationResult with final response
         """
-        # Phase 1: Local generation and consensus
-        print(f"  🏠 Local swarm generating...")
-        local_result = await self.local_swarm.generate(
+        peers = self.discovery.get_peers()
+        
+        if len(peers) == 0:
+            if min_peers > 0:
+                raise RuntimeError(f"Federation requires {min_peers} peers, but none found")
+
+            # Solo mode - just run local generation
+            print(f"  🏠 Solo mode - local swarm generating...")
+            local_result = await self.local_swarm.generate(
+                prompt=prompt,
+                max_tokens=max_tokens,
+                temperature=temperature,
+                use_consensus=True
+            )
+            return FederationResult(
+                final_response=local_result.selected_response.text,
+                local_confidence=local_result.confidence,
+                peer_votes=[],
+                strategy="solo"
+            )
+
+        # Parallel generation: Local swarm AND peers generate simultaneously
+        print(f"  🏠 Local swarm AND {len(peers)} peer(s) generating in parallel...")
+        
+        # Start local generation
+        local_task = self.local_swarm.generate(
             prompt=prompt,
             max_tokens=max_tokens,
             temperature=temperature,
             use_consensus=True
         )
-
-        local_best = local_result.selected_response
-        local_confidence = local_result.confidence
-
-        print(f"  ✓ Local best (confidence: {local_confidence:.2f})")
-
-        # Phase 2: Collect peer votes
-        peers = self.discovery.get_peers()
-
-        if len(peers) == 0:
-            if min_peers > 0:
-                raise RuntimeError(f"Federation requires {min_peers} peers, but none found")
-
-            # Solo mode - just return local result
-            return FederationResult(
-                final_response=local_best.text,
-                local_confidence=local_confidence,
-                peer_votes=[],
-                strategy="solo"
-            )
-
-        print(f"  🌐 Requesting votes from {len(peers)} peer(s)...")
-        for peer in peers:
-            print(f"    → Contacting {peer.name} at {peer.api_url}")
-
-        peer_votes = []
+        
+        # Start peer requests
         vote_tasks = [
             self.federation_client.request_vote(peer, prompt, max_tokens, temperature)
             for peer in peers
         ]
-
-        results = await asyncio.gather(*vote_tasks, return_exceptions=True)
-
-        for peer, result in zip(peers, results):
+        
+        # Run everything in parallel
+        all_tasks = [local_task] + vote_tasks
+        results = await asyncio.gather(*all_tasks, return_exceptions=True)
+        
+        # Separate local result from peer votes
+        local_result_raw = results[0]
+        if isinstance(local_result_raw, Exception):
+            print(f"  ✗ Local swarm failed: {local_result_raw}")
+            raise RuntimeError(f"Local generation failed: {local_result_raw}")
+        
+        from swarm.manager import ConsensusResult
+        local_result: ConsensusResult = local_result_raw  # Now guaranteed not to be an exception
+        local_best = local_result.selected_response
+        local_confidence = local_result.confidence
+        print(f"  ✓ Local completed (confidence: {local_confidence:.2f})")
+        
+        # Collect peer votes
+        peer_votes = []
+        for peer, result in zip(peers, results[1:]):
             if isinstance(result, Exception):
                 print(f"  ✗ Peer {peer.name} failed: {result}")
             elif result is not None:
                 peer_votes.append(result)
-                print(f"  ✓ Peer {peer.name} voted (confidence: {result.confidence:.2f})")
+                print(f"  ✓ Peer {peer.name} completed (confidence: {result.confidence:.2f})")
 
         if len(peer_votes) == 0:
             # No peers responded, use local result
@@ -240,16 +258,16 @@ class FederatedSwarm:
                 strategy="local_fallback"
             )
 
-        # Phase 3: Global consensus
+        # Global consensus
         print(f"  🗳️  Running global consensus ({len(peer_votes) + 1} votes)...")
-
-        final_response = self._weighted_vote(local_best.text, local_confidence, peer_votes)
+        final_response, winner = self._weighted_vote(local_best.text, local_confidence, peer_votes)
 
         return FederationResult(
             final_response=final_response,
             local_confidence=local_confidence,
             peer_votes=peer_votes,
-            strategy=self.consensus_strategy
+            strategy=self.consensus_strategy,
+            winner=winner
         )
 
     def _weighted_vote(
@@ -257,11 +275,14 @@ class FederatedSwarm:
         local_response: str,
         local_confidence: float,
         peer_votes: List[PeerVote]
-    ) -> str:
+    ) -> Tuple[str, str]:
         """
         Select best response using weighted voting.
 
         Weights by confidence score. Higher confidence = more weight.
+        
+        Returns:
+            Tuple of (selected_response, winner_name)
         """
         # Collect all votes with their weights
         all_votes = [(local_response, local_confidence, "local")]
@@ -292,12 +313,12 @@ class FederatedSwarm:
             best_idx = max(range(len(scores)), key=lambda i: scores[i])
             best = all_votes[best_idx]
             print(f"  ✓ Selected response from {best[2]} (quality score: {scores[best_idx]:.2f})")
-            return best[0]
+            return best[0], best[2]
 
         # Default: weighted selection - pick highest confidence
         best = max(all_votes, key=lambda x: x[1])
         print(f"  ✓ Selected response from {best[2]} (confidence: {best[1]:.2f})")
-        return best[0]
+        return best[0], best[2]
 
     async def get_federation_status(self) -> Dict[str, Any]:
         """Get current federation status."""