diff --git a/internal/intent/recognizer.go b/internal/intent/recognizer.go
new file mode 100644
index 00000000..21754825
--- /dev/null
+++ b/internal/intent/recognizer.go
@@ -0,0 +1,278 @@
+package intent
+
+import (
+	"context"
+	"fmt"
+	"regexp"
+	"strings"
+
+	"chat-agent-system/internal/bizdev"
+)
+
+// Recognizer 意图识别器接口
+type Recognizer interface {
+	Recognize(ctx context.Context, input string, userCtx *ContextSnapshot) (*IntentRecognitionResult, error)
+}
+
+// RuleBasedRecognizer 规则与上下文约束结合的轻量高效意图识别器
+type RuleBasedRecognizer struct{}
+
+func NewRecognizer() Recognizer {
+	return &RuleBasedRecognizer{}
+}
+
+func (r *RuleBasedRecognizer) Recognize(ctx context.Context, input string, userCtx *ContextSnapshot) (*IntentRecognitionResult, error) {
+	trimmed := strings.TrimSpace(input)
+	if trimmed == "" {
+		return &IntentRecognitionResult{
+			RawInput: input,
+			TopIntent: &CandidateIntent{
+				Intent:     IntentCasualChat,
+				Confidence: 1.0,
+				Reasoning:  "输入为空",
+			},
+			Candidates: []CandidateIntent{
+				{Intent: IntentCasualChat, Confidence: 1.0, Reasoning: "空输入"},
+			},
+		}, nil
+	}
+
+	snapID := ""
+	currentStage := bizdev.StageV01_Triage
+	if userCtx != nil {
+		snapID = userCtx.SnapshotID
+		if userCtx.CurrentStage != "" {
+			currentStage = bizdev.MaturityStage(userCtx.CurrentStage)
+		}
+	}
+
+	var candidates []CandidateIntent
+
+	// 1. 检验 ADVANCE_STAGE (推进阶段)
+	if cand := matchAdvanceStage(trimmed, currentStage); cand != nil {
+		candidates = append(candidates, *cand)
+	}
+
+	// 2. 检验 SUPPLEMENT_INFO (补充信息/参数变更)
+	if cand := matchSupplementInfo(trimmed); cand != nil {
+		candidates = append(candidates, *cand)
+	}
+
+	// 3. 检验 QUERY_PROGRESS (查询进度/参谋诊断/话术)
+	if cand := matchQueryProgress(trimmed); cand != nil {
+		candidates = append(candidates, *cand)
+	}
+
+	// 4. 检验 TRIGGER_TASK (特定任务触发)
+	if cand := matchTriggerTask(trimmed); cand != nil {
+		candidates = append(candidates, *cand)
+	}
+
+	// 5. 检验 CASUAL_CHAT (寒暄/通用咨询)
+	chatCand := CandidateIntent{
+		Intent:      IntentCasualChat,
+		Confidence:  0.2,
+		FilledSlots: make(map[string]string),
+		Reasoning:   "常规日常问候或未匹配特定业务指令",
+	}
+	if isGreetingOrHelp(trimmed) {
+		chatCand.Confidence = 0.85
+		chatCand.Reasoning = "匹配到问候语或通用帮助请求"
+	}
+	candidates = append(candidates, chatCand)
+
+	// 对 candidates 按置信度排序
+	sortCandidates(candidates)
+
+	top := &candidates[0]
+	requiresClarifying := false
+	if top.Confidence < 0.6 || len(top.MissingSlots) > 0 {
+		requiresClarifying = true
+	}
+
+	return &IntentRecognitionResult{
+		RawInput:           trimmed,
+		TopIntent:          top,
+		Candidates:         candidates,
+		ContextSnapshotID:  snapID,
+		RequiresClarifying: requiresClarifying,
+	}, nil
+}
+
+func matchAdvanceStage(input string, currentStage bizdev.MaturityStage) *CandidateIntent {
+	patterns := []string{
+		"进入下一阶段", "推进到下一阶段", "推进阶段", "进入方案", "进入论证",
+		"方案论证", "可行性论证", "开始方案", "进入报价", "开始报价", "商业锁定",
+		"进入v0.5", "推进到v0.5", "进入v1.0", "推进到v1.0", "可以进入",
+		"没有问题.*进入", "没问题.*推进", "通过.*下一阶段", "开始推进",
+	}
+
+	for _, p := range patterns {
+		if matched, _ := regexp.MatchString("(?i)"+p, input); matched {
+			var target bizdev.MaturityStage
+			if strings.Contains(input, "报价") || strings.Contains(input, "v1.0") || strings.Contains(input, "V1.0") || strings.Contains(input, "商业锁定") {
+				target = bizdev.StageV10_Quoting
+			} else if strings.Contains(input, "方案") || strings.Contains(input, "论证") || strings.Contains(input, "可行性") || strings.Contains(input, "v0.5") || strings.Contains(input, "V0.5") {
+				target = bizdev.StageV05_Feasibility
+			} else if strings.Contains(input, "摸底") || strings.Contains(input, "初筛") || strings.Contains(input, "v0.1") || strings.Contains(input, "V0.1") {
+				target = bizdev.StageV01_Triage
+			} else {
+				// 默认根据当前阶段自然顺推
+				if currentStage == bizdev.StageV01_Triage {
+					target = bizdev.StageV05_Feasibility
+				} else if currentStage == bizdev.StageV05_Feasibility {
+					target = bizdev.StageV10_Quoting
+				} else {
+					target = bizdev.StageV10_Quoting
+				}
+			}
+
+			reason := fmt.Sprintf("匹配推进指令 '%s'，目标成熟度阶段为 %s", p, target)
+
+			return &CandidateIntent{
+				Intent:     IntentAdvanceStage,
+				Confidence: 0.92,
+				FilledSlots: map[string]string{
+					SlotTargetStage: string(target),
+				},
+				Reasoning: reason,
+			}
+		}
+	}
+	return nil
+}
+
+func matchSupplementInfo(input string) *CandidateIntent {
+	patterns := []string{
+		"补充", "更新", "客户说", "客户反馈", "修改为", "改为", "增加",
+		"市场是", "参数是", "用途是", "设备是", "预算是", "时间是", "资料", "附件",
+	}
+
+	matchedAny := false
+	for _, p := range patterns {
+		if strings.Contains(input, p) {
+			matchedAny = true
+			break
+		}
+	}
+	if !matchedAny {
+		return nil
+	}
+
+	slots := make(map[string]string)
+	slots[SlotSupplementDoc] = input
+
+	// 细粒度槽位提取
+	if strings.Contains(input, "市场") {
+		slots[SlotFactKey] = "target_market"
+		slots[SlotFactValue] = extractValueAfter(input, []string{"市场是", "市场改为", "市场为", "目标市场是", "目标市场为", "市场"})
+	} else if strings.Contains(input, "预算") {
+		slots[SlotFactKey] = "budget"
+		slots[SlotFactValue] = extractValueAfter(input, []string{"预算是", "预算为", "预算"})
+	} else if strings.Contains(input, "时间") || strings.Contains(input, "周期") {
+		slots[SlotFactKey] = "timeline"
+		slots[SlotFactValue] = extractValueAfter(input, []string{"时间是", "时间为", "周期是", "周期为"})
+	} else if strings.Contains(input, "用途") {
+		slots[SlotFactKey] = "intended_use"
+		slots[SlotFactValue] = extractValueAfter(input, []string{"用途是", "用途为", "预期用途"})
+	}
+
+	return &CandidateIntent{
+		Intent:      IntentSupplementInfo,
+		Confidence:  0.88,
+		FilledSlots: slots,
+		Reasoning:   "用户输入中包含参数变更或新材料事实补充",
+	}
+}
+
+func matchQueryProgress(input string) *CandidateIntent {
+	patterns := []string{
+		"进展", "进度", "走到哪", "到哪一步", "状态", "情况", "评估到哪",
+		"风险", "坑", "注意什么", "话术", "怎么说", "怎么跟客户说", "微信", "草稿", "参谋",
+	}
+
+	for _, p := range patterns {
+		if strings.Contains(input, p) {
+			topic := "all"
+			if strings.Contains(input, "风险") || strings.Contains(input, "坑") {
+				topic = "risk"
+			} else if strings.Contains(input, "话术") || strings.Contains(input, "微信") || strings.Contains(input, "怎么说") {
+				topic = "talk_script"
+			} else if strings.Contains(input, "进展") || strings.Contains(input, "进度") || strings.Contains(input, "步") {
+				topic = "progress"
+			}
+
+			return &CandidateIntent{
+				Intent:     IntentQueryProgress,
+				Confidence: 0.90,
+				FilledSlots: map[string]string{
+					SlotQueryTopic: topic,
+				},
+				Reasoning: fmt.Sprintf("用户在询问项目状态、风险或对外沟通话术 (主题: %s)", topic),
+			}
+		}
+	}
+	return nil
+}
+
+func matchTriggerTask(input string) *CandidateIntent {
+	taskMap := map[string]string{
+		"需求收集表": "intake",
+		"需求表":   "intake",
+		"调研报告":  "research",
+		"调研":    "research",
+		"法规评估":  "feasibility_reg",
+		"注册评估":  "feasibility_reg",
+		"初步设计":  "prelim_design",
+		"设计方案":  "prelim_design",
+		"报价单":   "cdo_quote",
+		"报价":    "cdo_quote",
+	}
+
+	for kw, tKey := range taskMap {
+		if strings.Contains(input, kw) && (strings.Contains(input, "生成") || strings.Contains(input, "做") || strings.Contains(input, "跑") || strings.Contains(input, "出")) {
+			return &CandidateIntent{
+				Intent:     IntentTriggerTask,
+				Confidence: 0.86,
+				FilledSlots: map[string]string{
+					SlotTargetTask: tKey,
+				},
+				Reasoning: fmt.Sprintf("用户要求显式生成交付任务: %s (%s)", kw, tKey),
+			}
+		}
+	}
+	return nil
+}
+
+func isGreetingOrHelp(input string) bool {
+	greetings := []string{"你好", "您好", "在吗", "hi", "hello", "你是谁", "帮助", "能做什么", "怎么用"}
+	for _, g := range greetings {
+		if strings.Contains(strings.ToLower(input), g) {
+			return true
+		}
+	}
+	return false
+}
+
+func extractValueAfter(input string, prefixes []string) string {
+	for _, p := range prefixes {
+		if idx := strings.Index(input, p); idx != -1 {
+			val := strings.TrimSpace(input[idx+len(p):])
+			val = strings.Trim(val, "：:，,。 ")
+			if val != "" {
+				return val
+			}
+		}
+	}
+	return input
+}
+
+func sortCandidates(c []CandidateIntent) {
+	for i := 0; i < len(c)-1; i++ {
+		for j := i + 1; j < len(c); j++ {
+			if c[j].Confidence > c[i].Confidence {
+				c[i], c[j] = c[j], c[i]
+			}
+		}
+	}
+}
diff --git a/internal/intent/recognizer_test.go b/internal/intent/recognizer_test.go
new file mode 100644
index 00000000..952a2289
--- /dev/null
+++ b/internal/intent/recognizer_test.go
@@ -0,0 +1,102 @@
+package intent_test
+
+import (
+	"context"
+	"testing"
+
+	"chat-agent-system/internal/bizdev"
+	"chat-agent-system/internal/intent"
+)
+
+func TestIntentRecognition_QueryProgress(t *testing.T) {
+	rec := intent.NewRecognizer()
+	ctx := &intent.ContextSnapshot{
+		SnapshotID:   "ctx_test_1",
+		CurrentStage: string(bizdev.StageV01_Triage),
+	}
+
+	res, err := rec.Recognize(context.Background(), "现在这个便携超声立项评估到哪一步了？有啥风险没？", ctx)
+	if err != nil {
+		t.Fatalf("recognize failed: %v", err)
+	}
+
+	if res.TopIntent.Intent != intent.IntentQueryProgress {
+		t.Errorf("expected intent QUERY_PROGRESS, got %s", res.TopIntent.Intent)
+	}
+	if res.TopIntent.Confidence < 0.8 {
+		t.Errorf("expected confidence >= 0.8, got %v", res.TopIntent.Confidence)
+	}
+	if len(res.Candidates) == 0 {
+		t.Errorf("expected candidate intents list")
+	}
+}
+
+func TestIntentRecognition_SupplementInfo(t *testing.T) {
+	rec := intent.NewRecognizer()
+	ctx := &intent.ContextSnapshot{
+		SnapshotID: "ctx_test_2",
+	}
+
+	res, err := rec.Recognize(context.Background(), "客户刚才补充说，目标市场除了国内还想考虑欧洲 CE 认证", ctx)
+	if err != nil {
+		t.Fatalf("recognize failed: %v", err)
+	}
+
+	if res.TopIntent.Intent != intent.IntentSupplementInfo {
+		t.Errorf("expected intent SUPPLEMENT_INFO, got %s", res.TopIntent.Intent)
+	}
+	if res.TopIntent.FilledSlots[intent.SlotFactKey] != "target_market" {
+		t.Errorf("expected slot target_market, got %s", res.TopIntent.FilledSlots[intent.SlotFactKey])
+	}
+}
+
+func TestIntentRecognition_AdvanceStage(t *testing.T) {
+	rec := intent.NewRecognizer()
+	ctx := &intent.ContextSnapshot{
+		SnapshotID:   "ctx_test_3",
+		CurrentStage: string(bizdev.StageV01_Triage),
+	}
+
+	res, err := rec.Recognize(context.Background(), "摸底表我看过了，没问题，可以进入方案论证阶段了", ctx)
+	if err != nil {
+		t.Fatalf("recognize failed: %v", err)
+	}
+
+	if res.TopIntent.Intent != intent.IntentAdvanceStage {
+		t.Errorf("expected intent ADVANCE_STAGE, got %s", res.TopIntent.Intent)
+	}
+	if res.TopIntent.FilledSlots[intent.SlotTargetStage] != string(bizdev.StageV05_Feasibility) {
+		t.Errorf("expected target stage V0.5_feasibility, got %s", res.TopIntent.FilledSlots[intent.SlotTargetStage])
+	}
+}
+
+func TestIntentRecognition_TriggerTask(t *testing.T) {
+	rec := intent.NewRecognizer()
+	ctx := &intent.ContextSnapshot{
+		SnapshotID: "ctx_test_4",
+	}
+
+	res, err := rec.Recognize(context.Background(), "先帮我出一版初步报价单看看", ctx)
+	if err != nil {
+		t.Fatalf("recognize failed: %v", err)
+	}
+
+	if res.TopIntent.Intent != intent.IntentTriggerTask {
+		t.Errorf("expected intent TRIGGER_TASK, got %s", res.TopIntent.Intent)
+	}
+	if res.TopIntent.FilledSlots[intent.SlotTargetTask] != "cdo_quote" {
+		t.Errorf("expected target task cdo_quote, got %s", res.TopIntent.FilledSlots[intent.SlotTargetTask])
+	}
+}
+
+func TestIntentRecognition_CasualChat(t *testing.T) {
+	rec := intent.NewRecognizer()
+	res, err := rec.Recognize(context.Background(), "你好，请问你是谁？", nil)
+	if err != nil {
+		t.Fatalf("recognize failed: %v", err)
+	}
+
+	if res.TopIntent.Intent != intent.IntentCasualChat {
+		t.Errorf("expected intent CASUAL_CHAT, got %s", res.TopIntent.Intent)
+	}
+}
diff --git a/internal/intent/types.go b/internal/intent/types.go
new file mode 100644
index 00000000..125fa38f
--- /dev/null
+++ b/internal/intent/types.go
@@ -0,0 +1,49 @@
+package intent
+
+// IntentType 核心意图类别定义
+type IntentType string
+
+const (
+	IntentQueryProgress  IntentType = "QUERY_PROGRESS"  // 查询进度、成熟度、风险研判或沟通话术
+	IntentSupplementInfo IntentType = "SUPPLEMENT_INFO" // 补充/修改材料、事实信息或参数
+	IntentAdvanceStage   IntentType = "ADVANCE_STAGE"   // 确认推进到下一成熟度阶段 (如 V0.1 -> V0.5)
+	IntentTriggerTask    IntentType = "TRIGGER_TASK"    // 显式生成或重新执行特定交付物任务 (如 intake, quote)
+	IntentCasualChat     IntentType = "CASUAL_CHAT"     // 问候、闲聊或通用帮助引导
+)
+
+// CandidateIntent 候选意图提案（L1 对话层输出，由 L2 协调层终审）
+type CandidateIntent struct {
+	Intent                IntentType        `json:"intent"`
+	Confidence            float64           `json:"confidence"` // 置信度 0.0 - 1.0
+	FilledSlots           map[string]string `json:"filled_slots"`
+	MissingSlots          []string          `json:"missing_slots,omitempty"`
+	Reasoning             string            `json:"reasoning"`                        // 判断依据与文本佐证
+	ClarificationQuestion string            `json:"clarification_question,omitempty"` // 槽位缺失时的澄清追问
+}
+
+// IntentRecognitionResult 意图识别完整输出（多输出策略）
+type IntentRecognitionResult struct {
+	RawInput           string            `json:"raw_input"`
+	TopIntent          *CandidateIntent  `json:"top_intent"`
+	Candidates         []CandidateIntent `json:"candidates"`
+	ContextSnapshotID  string            `json:"context_snapshot_id,omitempty"`
+	RequiresClarifying bool              `json:"requires_clarifying"`
+}
+
+// 常见槽位 Key 常量定义
+const (
+	SlotTargetStage   = "target_stage"   // 目标阶段 (如 V0.1_triage, V0.5_feasibility, V1.0_quoting)
+	SlotTargetTask    = "target_task"    // 目标任务 (如 intake, research, cdo_quote)
+	SlotFactKey       = "fact_key"       // 事实键 (如 target_market, device_type)
+	SlotFactValue     = "fact_value"     // 事实值
+	SlotSupplementDoc = "supplement_doc" // 补充内容文本
+	SlotQueryTopic    = "query_topic"    // 查询主题 (如 progress, risk, talk_script, quotation)
+)
+
+// ContextSnapshot 传递给 L1 意图识别器的轻量上下文快照
+type ContextSnapshot struct {
+	SnapshotID       string   `json:"snapshot_id,omitempty"`
+	ProjectName      string   `json:"project_name,omitempty"`
+	CurrentStage     string   `json:"current_stage,omitempty"`
+	AvailableActions []string `json:"available_actions,omitempty"`
+}