diff --git a/.github/workflows/staging.yml b/.github/workflows/staging.yml
index 43dcd25..cd124dd 100644
--- a/.github/workflows/staging.yml
+++ b/.github/workflows/staging.yml
@@ -44,6 +44,6 @@ jobs:
       - name: Lint
         run: |
           cargo fmt --all -- --check
-          cargo clippy -- -D warnings
+          cargo clippy
       - name: Check
-        run: cargo check
\ No newline at end of file
+        run: cargo check
diff --git a/dev.md b/dev.md
index 360e6c0..d1de695 100644
--- a/dev.md
+++ b/dev.md
@@ -1,12 +1,34 @@
-# Versioning rule
+MDOJ is our two-person project, it unlikely to have entensive discussion with your,
+but we welcome contribution.
+
+> [!TIP]
+> Contribution is not hard, and people(two-person) are nice, so don't be afraid.
+
+# Priorities when making tradeoff
+
+1. Reasonable performance
+2. Ease of Use
+3. Code size
+
+# Pick an issue
+
+At the time of writing, our short-term goal is to make it usable for hosting small contest.
+
+Therefore, we prioritize [issue 16](https://github.com/mdcpp/mdoj/issues/16),
+see issue label and pick issue with `P-High` or `good first issue`.
+
+# Branching rule
+
+We design branching rule
 
 ## Master branch
 
 Branch suitable for development
 
-- application can run(standalone)
-- test can fail terribly
-- breaking change can only be push with pull request
+- Without API change(see grpc crate), all branch should compile.
+- Test can fail terribly.
+- Breaking change should be created by pull request.
+- Should format the code before push(clippy is not required).
 
 ## Staging branch
 
@@ -14,7 +36,10 @@ Branch suitable for nightly deployment
 
 - deployment is ready(docker-compose can run)
 - most test pass
-- document(how to config) should be synchronized with wiki
+- Clippy warning should be take care
+
+> [!IMPORTANT]
+> Please be sure API compatible before push master to staging
 
 ## Other branch