diff --git a/.blueprint/modules/agent-infrastructure.md b/.blueprint/modules/agent-infrastructure.md
index d8d7308..bb4fdcc 100644
--- a/.blueprint/modules/agent-infrastructure.md
+++ b/.blueprint/modules/agent-infrastructure.md
@@ -86,8 +86,8 @@
 > /architect 已完成（2026-06-29），复查自洽后拆为以下 5 张可执行卡。
 > 执行顺序：A 和 C 可并行 → B（依赖 A）→ D（依赖 A+B）→ E（依赖 C）
 
-### 📋 A. 框架层扫描 + 契约路径推断
-- status: todo
+### ✅ A. 框架层扫描 + 契约路径推断
+- status: done
 - complexity: M
 - files: src-tauri/src/commands/agent_infra.rs, src-tauri/src/commands/mod.rs, src-tauri/src/lib.rs, src/lib/commands.ts
 - acceptance: `scan_agent_infra_stack(project_path, project_id)` 能从 package.json（serde_json 解析 deps）和 Cargo.toml（字符串匹配）识别 Drizzle/Prisma/Hono/Axum 等框架，返回带 confidence 的 DetectedContract 列表；有单元测试覆盖 drizzle/prisma/hono 识别
diff --git a/src-tauri/src/commands/agent_infra.rs b/src-tauri/src/commands/agent_infra.rs
new file mode 100644
index 0000000..0094fdf
--- /dev/null
+++ b/src-tauri/src/commands/agent_infra.rs
@@ -0,0 +1,371 @@
+//! Agent 友好基础设施生成（接入包 v2）。
+//!
+//! 卡 A：扫描项目框架层技术栈，推断外部契约路径，为后续生成三件套做准备。
+//! 与 project_scan.rs（工具层）互补：本模块专注框架/ORM/API 层识别。
+
+use serde::{Deserialize, Serialize};
+use std::path::Path;
+
+// ── 公共数据结构 ──────────────────────────────────────────────────────────────
+
+/// 推断出的外部契约条目（由用户确认后传给 generate_agent_infra_files）。
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct DetectedContract {
+    /// 人读标签，如"数据库 schema（Drizzle）"
+    pub label: String,
+    /// 推断的路径列表（可含 glob，如 "src/routes/**"）
+    pub paths: Vec<String>,
+    /// 变更时的文档同步提示
+    pub doc: String,
+    /// "high"：路径文件在磁盘上存在；"medium"：仅从依赖推断；"low"：弱信号
+    pub confidence: String,
+}
+
+/// scan_agent_infra_stack 的完整返回值。
+#[derive(Debug, Serialize, Deserialize)]
+pub struct AgentInfraStack {
+    /// 识别到的契约列表（已去重，按 label 排序）
+    pub detected_contracts: Vec<DetectedContract>,
+    /// AGENTS.md 是否已含"## 文档防腐元规则"段落
+    pub meta_rules_present: bool,
+    /// docs/ai-context/project-context.yaml 是否已存在
+    pub context_yaml_exists: bool,
+}
+
+// ── package.json 解析 ─────────────────────────────────────────────────────────
+
+/// 从 package.json 提取 dependencies + devDependencies 的所有 key。
+fn pkg_json_dep_keys(root: &Path) -> Vec<String> {
+    let content = match std::fs::read_to_string(root.join("package.json")) {
+        Ok(c) => c,
+        Err(_) => return vec![],
+    };
+    let v: serde_json::Value = match serde_json::from_str(&content) {
+        Ok(v) => v,
+        Err(_) => return vec![],
+    };
+    let mut keys = Vec::new();
+    for section in &["dependencies", "devDependencies"] {
+        if let Some(obj) = v.get(section).and_then(|d| d.as_object()) {
+            keys.extend(obj.keys().cloned());
+        }
+    }
+    keys
+}
+
+/// 从 Cargo.toml 内容字符串中粗略判断某 crate 是否在依赖中。
+fn cargo_has(content: &str, crate_name: &str) -> bool {
+    // 匹配 `crate_name = ...` 或 `crate_name = { ... }` 形式
+    content.contains(&format!("\n{crate_name} "))
+        || content.contains(&format!("\n{crate_name}="))
+        || content.contains(&format!("\"{crate_name}\""))
+}
+
+// ── 框架识别核心 ──────────────────────────────────────────────────────────────
+
+fn path_exists(root: &Path, rel: &str) -> bool {
+    root.join(rel).exists()
+}
+
+fn confidence(root: &Path, path: &str) -> String {
+    if path.contains('*') {
+        "medium".into()
+    } else if path_exists(root, path) {
+        "high".into()
+    } else {
+        "medium".into()
+    }
+}
+
+fn detect_contracts(root: &Path) -> Vec<DetectedContract> {
+    let mut contracts: Vec<DetectedContract> = Vec::new();
+    let pkg_deps = pkg_json_dep_keys(root);
+    let cargo_content = std::fs::read_to_string(root.join("Cargo.toml")).unwrap_or_default();
+
+    // ── Node.js 框架层 ────────────────────────────────────────────────────────
+
+    // Drizzle ORM
+    if pkg_deps.iter().any(|k| k == "drizzle-orm") {
+        let p = if path_exists(root, "drizzle/schema.ts") {
+            "drizzle/schema.ts"
+        } else if path_exists(root, "src/db/schema.ts") {
+            "src/db/schema.ts"
+        } else {
+            "drizzle/schema.ts"
+        };
+        contracts.push(DetectedContract {
+            label: "数据库 schema（Drizzle）".into(),
+            paths: vec![p.into()],
+            doc: "schema 变更需同步更新数据库文档，检查 project-context.yaml".into(),
+            confidence: confidence(root, p),
+        });
+    }
+
+    // Prisma
+    if pkg_deps.iter().any(|k| k == "prisma" || k == "@prisma/client") {
+        let p = "prisma/schema.prisma";
+        contracts.push(DetectedContract {
+            label: "数据库 schema（Prisma）".into(),
+            paths: vec![p.into()],
+            doc: "schema 变更需同步更新数据库文档，检查 project-context.yaml".into(),
+            confidence: confidence(root, p),
+        });
+    }
+
+    // Hono
+    if pkg_deps.iter().any(|k| k == "hono") {
+        let p = if path_exists(root, "src/routes") {
+            "src/routes/**"
+        } else {
+            "src/index.ts"
+        };
+        contracts.push(DetectedContract {
+            label: "API 接口（Hono）".into(),
+            paths: vec![p.into()],
+            doc: "接口路由变更需同步更新 API 文档或 openapi.yaml".into(),
+            confidence: "medium".into(),
+        });
+    }
+
+    // Express
+    if pkg_deps.iter().any(|k| k == "express") {
+        contracts.push(DetectedContract {
+            label: "API 接口（Express）".into(),
+            paths: vec!["src/routes/**".into()],
+            doc: "接口路由变更需同步更新 API 文档".into(),
+            confidence: "medium".into(),
+        });
+    }
+
+    // Fastify
+    if pkg_deps.iter().any(|k| k == "fastify") {
+        contracts.push(DetectedContract {
+            label: "API 接口（Fastify）".into(),
+            paths: vec!["src/routes/**".into()],
+            doc: "接口路由变更需同步更新 API 文档".into(),
+            confidence: "medium".into(),
+        });
+    }
+
+    // tRPC
+    if pkg_deps.iter().any(|k| k == "@trpc/server") {
+        let p = if path_exists(root, "src/router") {
+            "src/router/**"
+        } else {
+            "src/trpc/**"
+        };
+        contracts.push(DetectedContract {
+            label: "API 接口（tRPC）".into(),
+            paths: vec![p.into()],
+            doc: "router 变更需同步 client 类型，检查 project-context.yaml".into(),
+            confidence: "medium".into(),
+        });
+    }
+
+    // pnpm monorepo 共享类型
+    if path_exists(root, "pnpm-workspace.yaml") {
+        let p = if path_exists(root, "packages/types") {
+            "packages/types/**"
+        } else if path_exists(root, "packages/shared") {
+            "packages/shared/**"
+        } else {
+            "packages/types/**"
+        };
+        contracts.push(DetectedContract {
+            label: "共享类型（pnpm monorepo）".into(),
+            paths: vec![p.into()],
+            doc: "共享类型只在此处定义，禁止在其他包内手抄".into(),
+            confidence: "medium".into(),
+        });
+    }
+
+    // .env.example → 环境变量声明
+    if path_exists(root, ".env.example") {
+        contracts.push(DetectedContract {
+            label: "环境变量声明".into(),
+            paths: vec![".env.example".into()],
+            doc: "新增环境变量必须在 .env.example 中同步声明".into(),
+            confidence: "high".into(),
+        });
+    }
+
+    // ── Rust 框架层 ───────────────────────────────────────────────────────────
+
+    if !cargo_content.is_empty() {
+        // Axum
+        if cargo_has(&cargo_content, "axum") {
+            let p = if path_exists(root, "src/routes.rs") {
+                "src/routes.rs"
+            } else if path_exists(root, "src/routes") {
+                "src/routes/**"
+            } else {
+                "src/routes/**"
+            };
+            contracts.push(DetectedContract {
+                label: "API 接口（Axum）".into(),
+                paths: vec![p.into()],
+                doc: "路由变更需同步 API 文档".into(),
+                confidence: if p.contains('*') { "medium".into() } else { "high".into() },
+            });
+        }
+
+        // SeaORM
+        if cargo_has(&cargo_content, "sea-orm") {
+            let p = "src/entities";
+            contracts.push(DetectedContract {
+                label: "数据库 schema（SeaORM）".into(),
+                paths: vec![format!("{p}/**")],
+                doc: "entity 变更需同步数据库文档".into(),
+                confidence: if path_exists(root, p) { "high".into() } else { "medium".into() },
+            });
+        }
+
+        // Tauri（自身的 command 层）
+        if cargo_has(&cargo_content, "tauri") && path_exists(root, "src-tauri/src/commands") {
+            contracts.push(DetectedContract {
+                label: "Tauri command 接口（前后端契约）".into(),
+                paths: vec![
+                    "src-tauri/src/commands/**/*.rs".into(),
+                    "src/lib/commands.ts".into(),
+                ],
+                doc: "新增 command 时前后端必须同步".into(),
+                confidence: "high".into(),
+            });
+        }
+    }
+
+    contracts
+}
+
+// ── Tauri Command ─────────────────────────────────────────────────────────────
+
+/// 扫描项目框架层技术栈，推断外部契约路径。
+/// project_path 为 Windows 本地项目根目录（绝对路径）。
+#[tauri::command]
+pub fn scan_agent_infra_stack(
+    project_path: String,
+) -> Result<AgentInfraStack, String> {
+    let root = Path::new(project_path.trim_end_matches(['/', '\\']));
+    if !root.exists() {
+        return Err(format!("目录不存在: {}", root.display()));
+    }
+
+    let detected_contracts = detect_contracts(root);
+
+    let meta_rules_present = std::fs::read_to_string(root.join("AGENTS.md"))
+        .map(|c| c.contains("## 文档防腐元规则"))
+        .unwrap_or(false);
+
+    let context_yaml_exists = root.join("docs/ai-context/project-context.yaml").exists();
+
+    Ok(AgentInfraStack {
+        detected_contracts,
+        meta_rules_present,
+        context_yaml_exists,
+    })
+}
+
+// ── 单元测试 ──────────────────────────────────────────────────────────────────
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::fs;
+
+    fn setup(dir: &std::path::Path) {
+        fs::create_dir_all(dir).unwrap();
+    }
+
+    fn write(dir: &std::path::Path, rel: &str, content: &str) {
+        let p = dir.join(rel);
+        if let Some(parent) = p.parent() {
+            fs::create_dir_all(parent).unwrap();
+        }
+        fs::write(p, content).unwrap();
+    }
+
+    #[test]
+    fn detects_drizzle() {
+        let dir = std::env::temp_dir().join(format!("ai_infra_test_drizzle_{}", std::process::id()));
+        setup(&dir);
+        write(&dir, "package.json", r#"{"dependencies":{"drizzle-orm":"^0.30.0","hono":"^4.0.0"}}"#);
+        write(&dir, "drizzle/schema.ts", "export const users = {};");
+
+        let contracts = detect_contracts(&dir);
+        let labels: Vec<&str> = contracts.iter().map(|c| c.label.as_str()).collect();
+        assert!(labels.contains(&"数据库 schema（Drizzle）"), "应识别 Drizzle");
+        assert!(labels.contains(&"API 接口（Hono）"), "应识别 Hono");
+
+        let drizzle = contracts.iter().find(|c| c.label.contains("Drizzle")).unwrap();
+        assert_eq!(drizzle.confidence, "high", "schema.ts 存在应为 high");
+
+        fs::remove_dir_all(&dir).unwrap();
+    }
+
+    #[test]
+    fn detects_prisma() {
+        let dir = std::env::temp_dir().join(format!("ai_infra_test_prisma_{}", std::process::id()));
+        setup(&dir);
+        write(&dir, "package.json", r#"{"devDependencies":{"prisma":"^5.0.0"},"dependencies":{"@prisma/client":"^5.0.0"}}"#);
+
+        let contracts = detect_contracts(&dir);
+        let labels: Vec<&str> = contracts.iter().map(|c| c.label.as_str()).collect();
+        assert!(labels.contains(&"数据库 schema（Prisma）"), "应识别 Prisma");
+
+        let prisma = contracts.iter().find(|c| c.label.contains("Prisma")).unwrap();
+        // schema.prisma 不存在，confidence 应为 medium
+        assert_eq!(prisma.confidence, "medium");
+
+        fs::remove_dir_all(&dir).unwrap();
+    }
+
+    #[test]
+    fn detects_axum_from_cargo() {
+        let dir = std::env::temp_dir().join(format!("ai_infra_test_axum_{}", std::process::id()));
+        setup(&dir);
+        write(&dir, "Cargo.toml", "[dependencies]\naxum = \"0.7\"\ntokio = { version = \"1\" }\n");
+
+        let contracts = detect_contracts(&dir);
+        let labels: Vec<&str> = contracts.iter().map(|c| c.label.as_str()).collect();
+        assert!(labels.contains(&"API 接口（Axum）"), "应识别 Axum");
+
+        fs::remove_dir_all(&dir).unwrap();
+    }
+
+    #[test]
+    fn detects_tauri_contract() {
+        let dir = std::env::temp_dir().join(format!("ai_infra_test_tauri_{}", std::process::id()));
+        setup(&dir);
+        write(&dir, "Cargo.toml", "[dependencies]\ntauri = \"2\"\n");
+        fs::create_dir_all(dir.join("src-tauri/src/commands")).unwrap();
+
+        let contracts = detect_contracts(&dir);
+        let found = contracts.iter().any(|c| c.label.contains("Tauri command"));
+        assert!(found, "应识别 Tauri command 契约");
+
+        fs::remove_dir_all(&dir).unwrap();
+    }
+
+    #[test]
+    fn empty_project_returns_empty() {
+        let dir = std::env::temp_dir().join(format!("ai_infra_test_empty_{}", std::process::id()));
+        setup(&dir);
+        let contracts = detect_contracts(&dir);
+        assert!(contracts.is_empty(), "无框架文件应返回空列表");
+        fs::remove_dir_all(&dir).unwrap();
+    }
+
+    #[test]
+    fn meta_rules_detection() {
+        let dir = std::env::temp_dir().join(format!("ai_infra_test_meta_{}", std::process::id()));
+        setup(&dir);
+        write(&dir, "AGENTS.md", "# Title\n## 文档防腐元规则\nsome content");
+        write(&dir, "package.json", "{}");
+
+        let result = scan_agent_infra_stack(dir.to_str().unwrap().to_string()).unwrap();
+        assert!(result.meta_rules_present);
+        assert!(!result.context_yaml_exists);
+
+        fs::remove_dir_all(&dir).unwrap();
+    }
+}
diff --git a/src-tauri/src/commands/mod.rs b/src-tauri/src/commands/mod.rs
index 2081817..4a50b57 100644
--- a/src-tauri/src/commands/mod.rs
+++ b/src-tauri/src/commands/mod.rs
@@ -34,3 +34,4 @@ pub mod source_library;
 pub mod cloud_products;
 pub mod cloud_db_databases;
 pub mod docker_apps;
+pub mod agent_infra;
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index 6ab08c3..31167c5 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -267,6 +267,8 @@ pub fn run() {
             list_buffed_projects,
             // onboarding pack
             commands::onboarding::apply_onboarding_pack,
+            // agent infrastructure
+            commands::agent_infra::scan_agent_infra_stack,
             commands::commit_metrics::get_commit_stats,
             // mentor
             get_mentor_context,
diff --git a/src/lib/commands.ts b/src/lib/commands.ts
index 8ea25f5..86a4e9c 100644
--- a/src/lib/commands.ts
+++ b/src/lib/commands.ts
@@ -1615,6 +1615,24 @@ export interface OnboardingReport {
 export const applyOnboardingPack = (projectPath: string, projectId: string) =>
   invoke<OnboardingReport>("apply_onboarding_pack", { projectPath, projectId });
 
+// ── Agent Infrastructure ──────────────────────────────────────────────────────
+
+export interface DetectedContract {
+  label: string;
+  paths: string[];
+  doc: string;
+  confidence: 'high' | 'medium' | 'low';
+}
+
+export interface AgentInfraStack {
+  detected_contracts: DetectedContract[];
+  meta_rules_present: boolean;
+  context_yaml_exists: boolean;
+}
+
+export const scanAgentInfraStack = (projectPath: string) =>
+  invoke<AgentInfraStack>('scan_agent_infra_stack', { projectPath });
+
 export interface CommitStats {
   total: number;
   conventional: number;