""" Stdio Bridge Server Part of SOVEREIGN PYTHON LLM ENGINE Stdio-based bridge for C frontend communication. Uses JSON-RPC 2.0 over stdin/stdout. """ import sys import asyncio import json from typing import Any from datetime import datetime from ..agents.react import ReActAgent, ReActConfig from ..tools.registry import ToolRegistry from ..tools.approval import ApprovalEngine from ..core.evidence import WORMLedger from ..core.crypto import generate_signing_key from ..runtime.providers.multi import MultiProvider from ..models.entities import Task, Message, MessageRole from pathlib import Path class StdioBridge: """ Stdio bridge server. Protocol: - C frontend writes JSON-RPC requests to our stdin - We write JSON-RPC responses to stdout - All messages are newline-delimited JSON """ def __init__(self): # Initialize components signing_key = generate_signing_key() self.ledger = WORMLedger(Path("bridge_evidence.worm"), signing_key) self.registry = ToolRegistry() self.approval = ApprovalEngine(self.ledger) self.model = MultiProvider() # OpenRouter → Ollama fallback # Initialize agent config = ReActConfig(max_steps=15, log_to_worm=True) self.agent = ReActAgent( self.model, self.registry, self.approval, self.ledger, config ) # Request handlers self.handlers = { "agent.run": self._handle_agent_run, "agent.stream": self._handle_agent_stream, "tool.execute": self._handle_tool_execute, "tool.list": self._handle_tool_list, "chat.message": self._handle_chat_message, "health": self._handle_health, } async def run(self): """Run stdio bridge server""" # Log startup await self.ledger.append({ "event": "bridge_startup", "timestamp": datetime.utcnow().isoformat() }) # Write ready signal self._write_response({ "jsonrpc": "2.0", "method": "bridge.ready", "params": { "version": "1.0.0", "capabilities": ["agent.run", "agent.stream", "tool.execute", "chat.message"] } }) # Read loop while True: try: # Read line from stdin line = await asyncio.get_event_loop().run_in_executor( None, sys.stdin.readline ) if not line: break # EOF line = line.strip() if not line: continue # Parse request request = json.loads(line) # Handle request response = await self._handle_request(request) # Write response if response: self._write_response(response) except KeyboardInterrupt: break except Exception as e: # Write error response self._write_response({ "jsonrpc": "2.0", "error": { "code": -32603, "message": "Internal error", "data": str(e) }, "id": None }) # Log shutdown await self.ledger.append({ "event": "bridge_shutdown", "timestamp": datetime.utcnow().isoformat() }) async def _handle_request(self, request: dict) -> dict | None: """Handle JSON-RPC request""" # Validate if request.get("jsonrpc") != "2.0": return { "jsonrpc": "2.0", "error": { "code": -32600, "message": "Invalid Request" }, "id": request.get("id") } method = request.get("method") if not method: return { "jsonrpc": "2.0", "error": { "code": -32600, "message": "Method required" }, "id": request.get("id") } params = request.get("params", {}) request_id = request.get("id") # Find handler handler = self.handlers.get(method) if not handler: return { "jsonrpc": "2.0", "error": { "code": -32601, "message": f"Method not found: {method}" }, "id": request_id } # Execute try: result = await handler(params) # Don't send response for notifications if request_id is None: return None return { "jsonrpc": "2.0", "result": result, "id": request_id } except Exception as e: return { "jsonrpc": "2.0", "error": { "code": -32000, "message": "Handler error", "data": str(e) }, "id": request_id } async def _handle_agent_run(self, params: dict) -> dict: """Handle agent.run request""" task_description = params.get("task") if not task_description: raise ValueError("task parameter required") # Create task task = Task( task_id=f"bridge-{datetime.utcnow().timestamp()}", description=task_description ) # Run agent result = await self.agent.run(task) return { "result": result, "task_id": task.task_id } async def _handle_agent_stream(self, params: dict) -> dict: """Handle agent.stream request""" # Streaming would require SSE or WebSocket # For now, fall back to non-streaming return await self._handle_agent_run(params) async def _handle_tool_execute(self, params: dict) -> dict: """Handle tool.execute request""" tool_name = params.get("tool") tool_args = params.get("args", {}) if not tool_name: raise ValueError("tool parameter required") # Get tool tool = self.registry.get(tool_name) if not tool: raise ValueError(f"Tool not found: {tool_name}") # Execute result = await tool.handler(**tool_args) return { "tool": tool_name, "result": str(result) } async def _handle_tool_list(self, params: dict) -> dict: """Handle tool.list request""" tools = self.registry.list_all() return { "tools": [ { "id": tool.tool_id, "description": tool.description, "risk_class": tool.risk_class.value } for tool in tools[:50] # Limit to 50 ] } async def _handle_chat_message(self, params: dict) -> dict: """Handle chat.message request""" message_text = params.get("message") if not message_text: raise ValueError("message parameter required") # Generate response using model messages = [ { "role": "user", "content": message_text } ] response = await self.model.invoke_model( model_id="anthropic.claude-3-5-sonnet-20241022-v2:0", messages=messages, max_tokens=2048 ) # Extract text reply = response["content"][0]["text"] return { "reply": reply } async def _handle_health(self, params: dict) -> dict: """Handle health check""" return { "status": "ok", "timestamp": datetime.utcnow().isoformat() } def _write_response(self, response: dict) -> None: """Write JSON response to stdout""" json_str = json.dumps(response) sys.stdout.write(json_str + "\n") sys.stdout.flush() def main(): """Entry point for stdio bridge""" bridge = StdioBridge() asyncio.run(bridge.run()) if __name__ == "__main__": main()