diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..534f6cf
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,33 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  ci:
+    name: test / fmt / clippy
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt, clippy
+
+      - name: Cache cargo build artifacts
+        uses: Swatinem/rust-cache@v2
+
+      - name: Check formatting
+        run: cargo fmt --check
+
+      - name: Run clippy
+        run: cargo clippy --all-targets -- -D warnings
+
+      - name: Run tests
+        run: cargo test
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..e2c8829
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 argszero
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/src/main.rs b/src/main.rs
index 0fb851a..7b8ff13 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -7,12 +7,11 @@
 
 /// 返回项目横幅文本（便于测试与展示）
 pub fn banner() -> String {
-    format!(
-        "AITokenPool — AI Token 共享池\n\
-         企业版：key 池 + 员工点数配额 · 公共版：共享市场\n\
-         架构：中心化（方案 A），Rust + axum\n\
-         状态：项目初始化中（2026-08-13）"
-    )
+    "AITokenPool — AI Token 共享池\n\
+     企业版：key 池 + 员工点数配额 · 公共版：共享市场\n\
+     架构：中心化（方案 A），Rust + axum\n\
+     状态：项目初始化中（2026-08-13）"
+        .to_string()
 }
 
 fn main() {