Version: 0.9.1.dev.260406

后端：
  1.新建conv/schedule_persist.go：ScheduleState Diff 持久化，事务内逐变更写库，支持 place/move/unplace 三种操作（当前
  event source）
  2.新建conv/schedule_provider.go：ScheduleState 加载适配，从 DB 合并 existing events + pending task items
  3.新建dao/agent_state_store_adapter.go：Redis 状态快照存取适配，实现 AgentStateStore 接口
  4.新建service/agentsvc/agent_newagent.go：newAgent service 集成层，串联 LLM
  客户端、ScheduleProvider、SchedulePersistor 和 ChunkEmitter
  5.更新node/execute.go：接入 SchedulePersistor（写操作确认后持久化）、完善 confirm resume 路径（PendingConfirmTool
  恢复分支）、correction 机制增加连续失败计数上限
  6.更新api/agent.go + cmd/start.go：接入 newAgent service，完成 API 层路由注册
  7.新建node/execute_confirm_flow_test.go + llm_tool_orchestration_test.go：确认回路 7 个测试 + 端到端排课 5
  个测试全部通过
  8.新建newAgent/ARCHITECTURE.md + ROADMAP.md：全链路架构文档和缺口分析
  9.代码审查整理：提取 prompt/base.go（通用 buildStageMessages 等5个辅助）、tools/args.go（参数解析辅助）；write_tools
  尾部辅助移入 write_helpers；修复 queryRangeSpecific sb.Reset() 逻辑缺陷和 Unplace guest Duration
  未恢复；ScheduleStateProvider/SchedulePersistor 归入 state_store.go；emitter 内部 Build*Text 函数降级为私有
前端：无
仓库：无

backend/newAgent/node/agent_nodes.go

@@ -3,6 +3,7 @@ package newagentnode
 import (
 	"context"
 	"errors"
+	"fmt"
 
 	newagentmodel "github.com/LoveLosita/smartflow/backend/newAgent/model"
 	newagenttools "github.com/LoveLosita/smartflow/backend/newAgent/tools"
@@ -147,21 +148,39 @@ func (n *AgentNodes) Execute(ctx context.Context, st *newagentmodel.AgentGraphSt
 
 	// 按需加载 ScheduleState（首次执行时从 DB 加载，后续复用内存中的 state）。
 	var scheduleState *newagenttools.ScheduleState
-	if ss, _ := st.EnsureScheduleState(ctx); ss != nil {
+	if ss, loadErr := st.EnsureScheduleState(ctx); loadErr != nil {
+		return nil, fmt.Errorf("execute node: 加载日程状态失败: %w", loadErr)
+	} else if ss != nil {
 		scheduleState = ss
 	}
 
+	// 注入工具 schema 到 ConversationContext，让 LLM 能看到可用工具列表。
+	if st.Deps.ToolRegistry != nil {
+		schemas := st.Deps.ToolRegistry.Schemas()
+		toolSchemas := make([]newagentmodel.ToolSchemaContext, len(schemas))
+		for i, s := range schemas {
+			toolSchemas[i] = newagentmodel.ToolSchemaContext{
+				Name:       s.Name,
+				Desc:       s.Desc,
+				SchemaText: s.SchemaText,
+			}
+		}
+		st.EnsureConversationContext().SetToolSchemas(toolSchemas)
+	}
+
 	if err := RunExecuteNode(
 		ctx,
 		ExecuteNodeInput{
-			RuntimeState:        st.EnsureRuntimeState(),
-			ConversationContext: st.EnsureConversationContext(),
-			UserInput:           st.Request.UserInput,
-			Client:              st.Deps.ResolveExecuteClient(),
-			ChunkEmitter:        st.EnsureChunkEmitter(),
-			ResumeNode:          "execute",
-			ToolRegistry:        st.Deps.ToolRegistry,
-			ScheduleState:       scheduleState,
+			RuntimeState:          st.EnsureRuntimeState(),
+			ConversationContext:   st.EnsureConversationContext(),
+			UserInput:             st.Request.UserInput,
+			Client:                st.Deps.ResolveExecuteClient(),
+			ChunkEmitter:          st.EnsureChunkEmitter(),
+			ResumeNode:            "execute",
+			ToolRegistry:          st.Deps.ToolRegistry,
+			ScheduleState:         scheduleState,
+			SchedulePersistor:     st.Deps.SchedulePersistor,
+			OriginalScheduleState: st.OriginalScheduleState,
 		},
 	); err != nil {
 		return nil, err