diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..73f802c
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,24 @@
+name: Cargo Build & Test
+
+on:
+  push:
+  pull_request:
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build_and_test:
+    name: Rust project - latest
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        toolchain:
+          - stable
+          - beta
+          - nightly
+    steps:
+      - uses: actions/checkout@v3
+      - run: rustup update ${{ matrix.toolchain }} && rustup default ${{ matrix.toolchain }}
+      - run: cargo build --verbose
+      - run: cargo test --verbose
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9f9cd0b..bf98bdd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,59 +1,9 @@
 # Changelog
 All notable changes to this project will be documented in this file.
 
-The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
-and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
-
 ## [Unreleased]
 
 ## [0.1.0](https://github.com/ModelTC/general-sam/releases/tag/v0.1.0) - 2023-10-13
 
-### Fixed
-- fix interface
-- fix stub
-
-### Other
-- add release-plz.yml
-- add dependabot.yml
-- update readme
-- add licenses info in readme
-- add documentation url to Cargo.toml
-- update readme
-- update tests and readme usage
-- update cargo settings
-- add readme to pybind
-- add python tests
-- add order related interfaces
-- add state copy interface
-- rename interface
-- update readme
-- add readme, update examples
-- update tests and docstring
-- add get_trans for SAM, update python stub
-- add token healing
-- utf8 or unicode
-- update pyo3
-- export other class in the extension
-- update __init__.py
-- add construct_trie_from_strings
-- update stub
-- add get_suffix_parent_id
-- add trie_utils
-- minor fix
-- update interfaces
-- cooler traveling
-- update interfaces
-- a little more idiomatic
-- add pybind
-- remove pyo3
-- add interfaces
-- move out tests, add sort utils
-- add insert to trie
-- minor update for sam
-- better naming for IterAsChain
-- use Clone rather than Copy
-- heal my back
-- more type gymnastics, which breaks my back
-- type gymnastics
-- init
-- add licenses
+### Added
+- Initial repository.
diff --git a/README.md b/README.md
index c23d276..e84ff04 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 A general suffix automaton implementation in Rust.
 
 Python bindings and some utilities are also available.
-Please check out [`pybind`](./pybind/).
+Please check out [`general-sam-py`](https://github.com/ModelTC/general-sam-py).
 
 |         [![the suffix automaton of abcbc][sam-of-abcbc]][sam-oi-wiki]          |
 | :----------------------------------------------------------------------------: |
diff --git a/src/trie_alike.rs b/src/trie_alike.rs
index 39556d4..345ac4e 100644
--- a/src/trie_alike.rs
+++ b/src/trie_alike.rs
@@ -5,6 +5,8 @@ pub enum TravelEvent<NodeType, KeyType> {
     Pop(NodeType),
 }
 
+/// This trait provides the essential interfaces required by `GeneralSAM`
+/// to construct a suffix automaton from structures that form a prefix tree.
 pub trait TrieNodeAlike {
     type InnerType;
     type NextStateIter: Iterator<Item = (Self::InnerType, Self)>;
@@ -56,6 +58,9 @@ pub trait TrieNodeAlike {
     }
 }
 
+// This struct implements `TrieNodeAlike` for any iterator.
+//
+// It can be used to construct a suffix automaton directly from a sequence.
 pub struct IterAsChain<Iter: Iterator> {
     iter: Iter,
     val: Option<Iter::Item>,