diff --git a/README.md b/README.md
index b455a65..ada1aca 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ GSP 是一个通用游戏规格协议与配套工具链，用于在人类、AI
 GSP/
   language/      GSP 语言定义与 schema
   toolkit/       GSP Toolkit Go CLI 源码
-  examples/      示例 GSP 文件
+  examples/      示例 GSP 工程
 ```
 
 生成产物默认放在：
@@ -70,4 +70,18 @@ bin/gsp.exe
 |---|---|
 | `language/README.md` | GSP 语言说明。 |
 | `language/gsp.schema.json` | GSP 核心字段 schema。 |
+| `language/gsp.manifest.schema.json` | GSP 工程 manifest schema。 |
 | `toolkit/README.md` | GSP Toolkit 命令与实现说明。 |
+
+## GSP 工程结构
+
+GSP 工程默认使用以下结构：
+
+```text
+project/
+  gsp.manifest
+  design/
+    *.gsp
+```
+
+Toolkit 默认从工程根目录的 `design/` 目录扫描 `.gsp` 文件。`gsp.manifest` 可声明语言版本、Toolkit 版本、入口 GSP、扫描范围、阶段规则和 type 列表。
diff --git a/examples/lottery/README.md b/examples/lottery/README.md
new file mode 100644
index 0000000..e42aacf
--- /dev/null
+++ b/examples/lottery/README.md
@@ -0,0 +1,28 @@
+# Lottery GSP Example
+
+这是一个 GSP 示例工程。
+
+## 结构
+
+```text
+lottery/
+  gsp.manifest
+  design/
+    *.gsp
+```
+
+## 入口
+
+```text
+page.lottery.main
+```
+
+## 生成
+
+从仓库根目录执行：
+
+```powershell
+.\bin\gsp.exe validate --root examples\lottery
+.\bin\gsp.exe flatten page.lottery.main --root examples\lottery --depth -1
+.\bin\gsp.exe graph page.lottery.main --root examples\lottery --format mermaid
+```
diff --git a/examples/lottery/audio.reward.pop.gsp b/examples/lottery/design/audio.reward.pop.gsp
similarity index 100%
rename from examples/lottery/audio.reward.pop.gsp
rename to examples/lottery/design/audio.reward.pop.gsp
diff --git a/examples/lottery/feedback.positive.gsp b/examples/lottery/design/feedback.positive.gsp
similarity index 100%
rename from examples/lottery/feedback.positive.gsp
rename to examples/lottery/design/feedback.positive.gsp
diff --git a/examples/lottery/mechanic.lottery.basic.gsp b/examples/lottery/design/mechanic.lottery.basic.gsp
similarity index 100%
rename from examples/lottery/mechanic.lottery.basic.gsp
rename to examples/lottery/design/mechanic.lottery.basic.gsp
diff --git a/examples/lottery/motion.button.reward_pop.gsp b/examples/lottery/design/motion.button.reward_pop.gsp
similarity index 100%
rename from examples/lottery/motion.button.reward_pop.gsp
rename to examples/lottery/design/motion.button.reward_pop.gsp
diff --git a/examples/lottery/page.lottery.main.gsp b/examples/lottery/design/page.lottery.main.gsp
similarity index 100%
rename from examples/lottery/page.lottery.main.gsp
rename to examples/lottery/design/page.lottery.main.gsp
diff --git a/examples/lottery/style.reward.light.gsp b/examples/lottery/design/style.reward.light.gsp
similarity index 100%
rename from examples/lottery/style.reward.light.gsp
rename to examples/lottery/design/style.reward.light.gsp
diff --git a/examples/lottery/ui.button.primary.gsp b/examples/lottery/design/ui.button.primary.gsp
similarity index 100%
rename from examples/lottery/ui.button.primary.gsp
rename to examples/lottery/design/ui.button.primary.gsp
diff --git a/examples/lottery/ui.button.reward_primary.gsp b/examples/lottery/design/ui.button.reward_primary.gsp
similarity index 100%
rename from examples/lottery/ui.button.reward_primary.gsp
rename to examples/lottery/design/ui.button.reward_primary.gsp
diff --git a/examples/lottery/gsp.manifest b/examples/lottery/gsp.manifest
new file mode 100644
index 0000000..5205a52
--- /dev/null
+++ b/examples/lottery/gsp.manifest
@@ -0,0 +1,39 @@
+gspVersion: 0.1
+toolkitVersion: 0.1
+project: lottery-example
+
+entry:
+  - page.lottery.main
+
+scan:
+  - design
+
+stageRules:
+  design:
+    minResolution: L0
+  integrate:
+    minResolution: L2
+  implement:
+    minResolution: L3
+  bind:
+    minResolution: L4
+  release:
+    minResolution: L5
+
+types:
+  - note
+  - concept
+  - style
+  - system
+  - feature
+  - mechanic
+  - flow
+  - page
+  - ui
+  - interaction
+  - feedback
+  - motion
+  - visual
+  - audio
+  - haptic
+  - binding
diff --git a/language/README.md b/language/README.md
index dd201f1..96b740f 100644
--- a/language/README.md
+++ b/language/README.md
@@ -12,6 +12,7 @@ README 面向准备使用 GSP 语言的人类和 AI。它说明 GSP 的用途、
 |---|---|
 | `README.md` | GSP 语言使用前说明。给人类和 AI 阅读。 |
 | `gsp.schema.json` | GSP 第一版核心字段规范。使用 JSON Schema 表达，便于 AI、工具、编译器和实现模块识别。 |
+| `gsp.manifest.schema.json` | GSP 工程 manifest 字段规范。 |
 
 ## GSP 是什么
 
@@ -57,6 +58,8 @@ id: feedback.positive
 
 只有 `id` 的 GSP 是占位声明。它表示该设计对象存在，但尚未被细化。
 
+默认情况下，`.gsp` 文件放在 GSP 工程根目录的 `design/` 目录下。
+
 ## 基础 GSP
 
 `context` 用于写入核心设计内容。
diff --git a/language/gsp.manifest.schema.json b/language/gsp.manifest.schema.json
new file mode 100644
index 0000000..090c089
--- /dev/null
+++ b/language/gsp.manifest.schema.json
@@ -0,0 +1,62 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://gsp.local/schema/gsp.manifest.schema.json",
+  "title": "GSP Manifest",
+  "description": "Game Specification Protocol project manifest schema.",
+  "type": "object",
+  "additionalProperties": true,
+  "properties": {
+    "gspVersion": {
+      "type": "string",
+      "description": "GSP language version used by this project."
+    },
+    "toolkitVersion": {
+      "type": "string",
+      "description": "Expected GSP Toolkit version."
+    },
+    "project": {
+      "type": "string",
+      "description": "Project id or name."
+    },
+    "entry": {
+      "type": "array",
+      "items": {
+        "type": "string",
+        "minLength": 1
+      },
+      "description": "Entry GSP ids."
+    },
+    "scan": {
+      "type": "array",
+      "items": {
+        "type": "string",
+        "minLength": 1
+      },
+      "description": "Directories or files scanned by the Toolkit. Defaults to design."
+    },
+    "stageRules": {
+      "type": "object",
+      "additionalProperties": {
+        "type": "object",
+        "additionalProperties": true,
+        "properties": {
+          "minResolution": {
+            "type": "string",
+            "enum": ["L0", "L1", "L2", "L3", "L4", "L5"]
+          }
+        }
+      }
+    },
+    "types": {
+      "type": "array",
+      "items": {
+        "type": "string",
+        "minLength": 1
+      }
+    },
+    "output": {
+      "type": "string",
+      "description": "Default Toolkit output directory."
+    }
+  }
+}
diff --git a/toolkit/README.md b/toolkit/README.md
index 8985585..d0d64a6 100644
--- a/toolkit/README.md
+++ b/toolkit/README.md
@@ -26,13 +26,25 @@ GSP Toolkit 是 GSP 的配套工具集。
 
 `.gsp` 文件内部遵循 YAML 风格格式。
 
+默认工程结构：
+
+```text
+project/
+  gsp.manifest
+  design/
+    *.gsp
+```
+
+未提供 manifest 时，Toolkit 默认扫描工程根目录下的 `design/`。
+
 严格字段规范参考：
 
 ```text
 ../language/gsp.schema.json
+../language/gsp.manifest.schema.json
 ```
 
-项目级入口配置待讨论，暂定方向：
+项目级入口配置：
 
 ```text
 gsp.manifest
diff --git a/toolkit/internal/gsp/load.go b/toolkit/internal/gsp/load.go
index a669698..9f0cc56 100644
--- a/toolkit/internal/gsp/load.go
+++ b/toolkit/internal/gsp/load.go
@@ -28,26 +28,45 @@ func LoadProject(root string) (*Project, error) {
 		ByID:       map[string]*Unit{},
 		Duplicates: map[string][]*Unit{},
 	}
+	manifest, err := loadManifest(absRoot)
+	if err != nil {
+		project.LoadIssues = append(project.LoadIssues, Issue{Level: "error", Code: "manifest_error", File: "gsp.manifest", Message: err.Error()})
+	}
+	project.Manifest = manifest
 
 	var files []string
-	err = filepath.WalkDir(absRoot, func(path string, entry os.DirEntry, walkErr error) error {
-		if walkErr != nil {
-			project.LoadIssues = append(project.LoadIssues, Issue{Level: "error", Code: "walk_error", File: path, Message: walkErr.Error()})
-			return nil
+	for _, scanEntry := range project.Manifest.scanEntries() {
+		scanPath := filepath.Join(absRoot, filepath.FromSlash(scanEntry))
+		info, statErr := os.Stat(scanPath)
+		if statErr != nil {
+			project.LoadIssues = append(project.LoadIssues, Issue{Level: "warning", Code: "scan_missing", File: scanEntry, Message: "scan path does not exist"})
+			continue
 		}
-		if entry.IsDir() {
-			if ignoredDirs[entry.Name()] {
-				return filepath.SkipDir
+		if !info.IsDir() {
+			if strings.EqualFold(filepath.Ext(scanPath), ".gsp") {
+				files = append(files, scanPath)
+			}
+			continue
+		}
+		walkErr := filepath.WalkDir(scanPath, func(path string, entry os.DirEntry, walkErr error) error {
+			if walkErr != nil {
+				project.LoadIssues = append(project.LoadIssues, Issue{Level: "error", Code: "walk_error", File: path, Message: walkErr.Error()})
+				return nil
+			}
+			if entry.IsDir() {
+				if ignoredDirs[entry.Name()] {
+					return filepath.SkipDir
+				}
+				return nil
+			}
+			if strings.EqualFold(filepath.Ext(entry.Name()), ".gsp") {
+				files = append(files, path)
 			}
 			return nil
+		})
+		if walkErr != nil {
+			return nil, walkErr
 		}
-		if strings.EqualFold(filepath.Ext(entry.Name()), ".gsp") {
-			files = append(files, path)
-		}
-		return nil
-	})
-	if err != nil {
-		return nil, err
 	}
 	sort.Strings(files)
 
diff --git a/toolkit/internal/gsp/manifest.go b/toolkit/internal/gsp/manifest.go
new file mode 100644
index 0000000..21e41ec
--- /dev/null
+++ b/toolkit/internal/gsp/manifest.go
@@ -0,0 +1,58 @@
+package gsp
+
+import (
+	"os"
+	"path/filepath"
+
+	"gopkg.in/yaml.v3"
+)
+
+type Manifest struct {
+	GSPVersion     string               `json:"gspVersion,omitempty" yaml:"gspVersion"`
+	ToolkitVersion string               `json:"toolkitVersion,omitempty" yaml:"toolkitVersion"`
+	Project        string               `json:"project,omitempty" yaml:"project"`
+	Entry          []string             `json:"entry,omitempty" yaml:"entry"`
+	Scan           []string             `json:"scan,omitempty" yaml:"scan"`
+	StageRules     map[string]StageRule `json:"stageRules,omitempty" yaml:"stageRules"`
+	Types          []string             `json:"types,omitempty" yaml:"types"`
+	Output         string               `json:"output,omitempty" yaml:"output"`
+	File           string               `json:"file,omitempty" yaml:"-"`
+}
+
+type StageRule struct {
+	MinResolution string `json:"minResolution,omitempty" yaml:"minResolution"`
+}
+
+func loadManifest(root string) (*Manifest, error) {
+	path := filepath.Join(root, "gsp.manifest")
+	data, err := os.ReadFile(path)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil, nil
+		}
+		return nil, err
+	}
+	var manifest Manifest
+	if err := yaml.Unmarshal(data, &manifest); err != nil {
+		return nil, err
+	}
+	manifest.File = relPath(root, path)
+	return &manifest, nil
+}
+
+func (m *Manifest) scanEntries() []string {
+	if m == nil || len(m.Scan) == 0 {
+		return []string{"design"}
+	}
+	return m.Scan
+}
+
+func (m *Manifest) minResolution(stage string) (string, bool) {
+	if m != nil && m.StageRules != nil {
+		if rule, ok := m.StageRules[stage]; ok && rule.MinResolution != "" {
+			return rule.MinResolution, true
+		}
+	}
+	value, ok := defaultStageRules[stage]
+	return value, ok
+}
diff --git a/toolkit/internal/gsp/model.go b/toolkit/internal/gsp/model.go
index 15e7310..ac88a5b 100644
--- a/toolkit/internal/gsp/model.go
+++ b/toolkit/internal/gsp/model.go
@@ -96,6 +96,7 @@ func (r *Report) addNotice(code, id, file, message string) {
 
 type Project struct {
 	Root       string
+	Manifest   *Manifest
 	Units      []*Unit
 	ByID       map[string]*Unit
 	Duplicates map[string][]*Unit
diff --git a/toolkit/internal/gsp/project.go b/toolkit/internal/gsp/project.go
index 93eda89..9a72a96 100644
--- a/toolkit/internal/gsp/project.go
+++ b/toolkit/internal/gsp/project.go
@@ -9,8 +9,15 @@ import (
 func (p *Project) Validate(stage string) Report {
 	report := Report{OK: true}
 	for _, issue := range p.LoadIssues {
-		report.Errors = append(report.Errors, issue)
-		report.OK = false
+		switch issue.Level {
+		case "error":
+			report.Errors = append(report.Errors, issue)
+			report.OK = false
+		case "warning":
+			report.Warnings = append(report.Warnings, issue)
+		default:
+			report.Notices = append(report.Notices, issue)
+		}
 	}
 	for _, unit := range p.Units {
 		if unit.ID == "" {
@@ -81,15 +88,17 @@ func (p *Project) Index() []IndexEntry {
 	return entries
 }
 
+var defaultStageRules = map[string]string{
+	"design":    "L0",
+	"integrate": "L2",
+	"implement": "L3",
+	"bind":      "L4",
+	"release":   "L5",
+}
+
 func (p *Project) StageCheck(stage string) Report {
 	report := Report{OK: true}
-	required, ok := map[string]string{
-		"design":    "L0",
-		"integrate": "L2",
-		"implement": "L3",
-		"bind":      "L4",
-		"release":   "L5",
-	}[stage]
+	required, ok := p.Manifest.minResolution(stage)
 	if !ok {
 		report.addError("unknown_stage", "", "", fmt.Sprintf("unknown stage %q", stage))
 		return report
diff --git a/toolkit/internal/gsp/project_test.go b/toolkit/internal/gsp/project_test.go
index 79b11d3..8f03e9f 100644
--- a/toolkit/internal/gsp/project_test.go
+++ b/toolkit/internal/gsp/project_test.go
@@ -8,7 +8,11 @@ import (
 
 func TestLoadValidateAndFlatten(t *testing.T) {
 	root := t.TempDir()
-	writeTestFile(t, root, "page.gsp", `id: page.lottery.main
+	design := filepath.Join(root, "design")
+	if err := os.MkdirAll(design, 0755); err != nil {
+		t.Fatal(err)
+	}
+	writeTestFile(t, design, "page.gsp", `id: page.lottery.main
 type: page
 resolution: L3
 context: Lottery page.
@@ -18,17 +22,17 @@ with:
   - feedback.positive
 refines: page.lottery.base
 `)
-	writeTestFile(t, root, "button.gsp", `id: ui.button.primary
+	writeTestFile(t, design, "button.gsp", `id: ui.button.primary
 type: ui
 resolution: L3
 context: Primary button.
 `)
-	writeTestFile(t, root, "feedback.gsp", `id: feedback.positive
+	writeTestFile(t, design, "feedback.gsp", `id: feedback.positive
 type: feedback
 resolution: L2
 context: Positive feedback.
 `)
-	writeTestFile(t, root, "base.gsp", `id: page.lottery.base
+	writeTestFile(t, design, "base.gsp", `id: page.lottery.base
 resolution: L2
 context: Base lottery page.
 `)
@@ -52,7 +56,11 @@ context: Base lottery page.
 
 func TestValidateMissingReference(t *testing.T) {
 	root := t.TempDir()
-	writeTestFile(t, root, "page.gsp", `id: page.missing
+	design := filepath.Join(root, "design")
+	if err := os.MkdirAll(design, 0755); err != nil {
+		t.Fatal(err)
+	}
+	writeTestFile(t, design, "page.gsp", `id: page.missing
 with:
   - ui.missing
 `)
@@ -77,7 +85,11 @@ with:
 
 func TestStageCheck(t *testing.T) {
 	root := t.TempDir()
-	writeTestFile(t, root, "page.gsp", `id: page.low
+	design := filepath.Join(root, "design")
+	if err := os.MkdirAll(design, 0755); err != nil {
+		t.Fatal(err)
+	}
+	writeTestFile(t, design, "page.gsp", `id: page.low
 resolution: L2
 `)
 	project, err := LoadProject(root)