diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..d99d47d
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,2 @@
+# .env.example make the repo not pure python
+.env.example linguist-vendored
diff --git a/README.md b/README.md
index 680052a..ee5f801 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ source env/Scripts/activate # each time when you need this venv
 
 ```bash
 pip3 install -e .
-cp .env.exmaple .env && vi .env # configure environment
+cp .env.example .env && vi .env # configure environment
 joint-teapot --help
 ```
 
@@ -31,15 +31,22 @@ pre-commit install
 pytest -svv
 ```
 
-## Features
+## Commands & Features
 
-- [x] retrieve the hw/project releases for all students
-- [x] open "bulk issues" to report something wrong
-- [x] collect all the public keys
-- [x] import groups (create teams)
-- [x] create repos
-- [x] archive all repos of a course
-- [x] check whether an issue exists with appointed title
+- archive-all-repos          archive all repos in gitea organization
+- check-issues               check the existence of issue by title on gitea
+- checkout-releases          checkout git repo to git tag fetched from gitea by release name, with due date
+- clone-all-repos            clone all gitea repos to local
+- close-all-issues           close all issues and pull requests in gitea organization
+- create-issues              create issues on gitea
+- create-personal-repos      create personal repos on gitea for all canvas students
+- create-teams               create teams on gitea by canvas groups
+- get-no-collaborator-repos  list all repos with no collaborators
+- get-public-keys            list all public keys on gitea
+- get-repos-status           list status of all repos with conditions
+- invite-to-teams            invite all canvas students to gitea teams by team name
+- prepare-assignment-dir     prepare assignment dir from extracted canvas "Download Submissions" zip
+- upload-assignment-grades   upload assignment grades to canvas from grade file (GRADE.txt by default), read the first line as grade, the rest as comments
 
 ## License
 
diff --git a/joint_teapot/app.py b/joint_teapot/app.py
index 5b8d7ab..70c36aa 100644
--- a/joint_teapot/app.py
+++ b/joint_teapot/app.py
@@ -93,9 +93,9 @@ def close_all_issues() -> None:
     tea.pot.gitea.close_all_issues()
 
 
-@app.command("archieve-all-repos", help="archieve all repos in gitea organization")
-def archieve_all_repos() -> None:
-    tea.pot.gitea.archieve_all_repos()
+@app.command("archive-all-repos", help="archive all repos in gitea organization")
+def archive_all_repos() -> None:
+    tea.pot.gitea.archive_all_repos()
 
 
 @app.command("get-no-collaborator-repos", help="list all repos with no collaborators")
diff --git a/joint_teapot/workers/gitea.py b/joint_teapot/workers/gitea.py
index c9ed772..dacf361 100644
--- a/joint_teapot/workers/gitea.py
+++ b/joint_teapot/workers/gitea.py
@@ -349,7 +349,7 @@ class Gitea:
                         self.org_name, repo_name, issue.number, body={"state": "closed"}
                     )
 
-    def archieve_all_repos(self) -> None:
+    def archive_all_repos(self) -> None:
         for repo in list_all(self.organization_api.org_list_repos, self.org_name):
             self.repository_api.repo_edit(
                 self.org_name, repo.name, body={"archived": True}
diff --git a/requirements.txt b/requirements.txt
index fd49c60..6388f15 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,7 @@
 canvasapi>=2.2.0
 focs_gitea>=1.0.0
 GitPython>=3.1.18
+joj-submitter>=0.0.8
 loguru>=0.5.3
 patool>=1.12
 pydantic[dotenv]>=1.8.1