diff --git a/agent/new.go.bak b/agent/new.go.bak
deleted file mode 100644
index db1e9a6..0000000
--- a/agent/new.go.bak
+++ /dev/null
@@ -1,60 +0,0 @@
-package agent
-
-import (
-	"sync"
-
-	"ollie/backend"
-	olog "ollie/log"
-	"ollie/toolsrv"
-)
-
-// AgentCfg is the configuration for constructing a new Agent.
-type AgentCfg struct {
-	History        *History
-	Runtime        *Runtime
-	AgentName      string
-	AgentsDir      string
-	AgentID        string // unique agent identity
-	CWD            string // working directory for tool execution
-	BaseLayers     []string
-	PromptEnvExtra []string
-	NewToolServer  func() toolsrv.Runner
-	NewBackend     func(string) (backend.Backend, error)
-	Output         EventHandler
-	Log            *olog.Logger
-	AuditLog       *olog.Logger
-	SessionID      string
-	StartupMsgs    []string
-	ReadPlanStep   func() string
-	SaveSession    func()
-	FlushSave      func()
-}
-
-// NewAgent constructs an Agent from the given configuration.
-func NewAgent(cfg AgentCfg) *Agent {
-	ag := &Agent{
-		history:         cfg.History,
-		runtime:         cfg.Runtime,
-		agentName:       cfg.AgentName,
-		agentsDir:       cfg.AgentsDir,
-		id:              cfg.AgentID,
-		cwd:             cfg.CWD,
-		baseLayers:      cfg.BaseLayers,
-		promptEnvExtra:  cfg.PromptEnvExtra,
-		newToolServer:   cfg.NewToolServer,
-		newBackend:      cfg.NewBackend,
-		output:          cfg.Output,
-		log:             cfg.Log,
-		auditLog:        cfg.AuditLog,
-		sessionID:       cfg.SessionID,
-		startupMessages: cfg.StartupMsgs,
-		readPlanStep:    cfg.ReadPlanStep,
-		saveSession:     cfg.SaveSession,
-		flushSave:       cfg.FlushSave,
-		state:           "idle",
-	}
-	ag.changeCond = sync.NewCond(&ag.changeMu)
-	ag.turnError = ag.defaultTurnError
-	ag.wireToolsChanged()
-	return ag
-}