diff --git a/async-git/Cargo.toml b/async-git/Cargo.toml
index 55ad02e..0b29ed6 100644
--- a/async-git/Cargo.toml
+++ b/async-git/Cargo.toml
@@ -13,7 +13,7 @@ path = "bin/git.rs"
 tokio = { version = "0.2.18", default-features = false, features = ["fs", "macros"] }
 typenum = { version = "1.12.0", default-features = false }
 structopt = { version = "0.3.13", default-features = false }
-anyhow = { version = "1.0.28", default-features = false }
+anyhow = { version = "1.0.28" }
 thiserror = { version = "1.0.15", default-features = false }
 futures = { version = "0.3.4", default-features = false }
 sha-1 = { version = "0.8.2", default-features = false }
diff --git a/async-git/docs/compatibility.md b/async-git/docs/compatibility.md
new file mode 100644
index 0000000..a3e8f17
--- /dev/null
+++ b/async-git/docs/compatibility.md
@@ -0,0 +1,5 @@
+compatibility
+=============
+
+| feature | status | notes |
+|---|---|---|
diff --git a/async-git/src/plumbing/repo.rs b/async-git/src/plumbing/repo.rs
index 5614ac7..7d0b79d 100644
--- a/async-git/src/plumbing/repo.rs
+++ b/async-git/src/plumbing/repo.rs
@@ -1,7 +1,22 @@
 use std::path::Path;
+use std::env;
+
+use anyhow::Result;
 
 pub struct Repository {}
 
 impl Repository {
     pub async fn open(path: impl AsRef<Path>) {}
 }
+
+pub async fn is_repo(path: impl AsRef<Path>) -> Result<bool> {
+    Ok(false)
+}
+
+/// Find the closest repository that the current repository belongs to.
+pub async fn find() -> Result<Option<Repository>> {
+    let mut cwd = env::current_dir()?;
+    loop {
+    }
+    Ok(None)
+}
diff --git a/async-zlib/src/deflate/deflate.rs b/async-zlib/src/deflate/deflate.rs
index e69de29..8b13789 100644
--- a/async-zlib/src/deflate/deflate.rs
+++ b/async-zlib/src/deflate/deflate.rs
@@ -0,0 +1 @@
+