feat(mcp): refactor, support prompts, changed events

internal/agent/coordinator.go

@@ -344,28 +344,24 @@ func (c *coordinator) buildTools(ctx context.Context, agent config.Agent) ([]fan
 		}
 	}
 
-	mcpTools := tools.GetMCPTools(context.Background(), c.permissions, c.cfg)
-
-	for _, mcpTool := range mcpTools {
+	for _, tool := range tools.GetMCPTools(c.permissions, c.cfg.WorkingDir()) {
 		if agent.AllowedMCP == nil {
 			// No MCP restrictions
-			filteredTools = append(filteredTools, mcpTool)
-		} else if len(agent.AllowedMCP) == 0 {
-			// no mcps allowed
+			filteredTools = append(filteredTools, tool)
+			continue
+		}
+		if len(agent.AllowedMCP) == 0 {
+			// No MCPs allowed
+			slog.Warn("MCPs not allowed")
 			break
 		}
 
 		for mcp, tools := range agent.AllowedMCP {
-			if mcp == mcpTool.MCP() {
-				if len(tools) == 0 {
-					filteredTools = append(filteredTools, mcpTool)
-				}
-				for _, t := range tools {
-					if t == mcpTool.MCPToolName() {
-						filteredTools = append(filteredTools, mcpTool)
-					}
-				}
-				break
+			if mcp != tool.MCP() {
+				continue
+			}
+			if len(tools) == 0 || slices.Contains(tools, tool.MCPToolName()) {
+				filteredTools = append(filteredTools, tool)
 			}
 		}
 	}

internal/agent/tools/fetch.go

@@ -28,12 +28,6 @@ type FetchPermissionsParams struct {
 	Timeout int    `json:"timeout,omitempty"`
 }
 
-type fetchTool struct {
-	client      *http.Client
-	permissions permission.Service
-	workingDir  string
-}
-
 const FetchToolName = "fetch"
 
 //go:embed fetch.md