diff --git a/scripts/development-release.ts b/scripts/development-release.ts
deleted file mode 100755
index 5689b2aab68216d193ff7042400919fa3bf0e739..0000000000000000000000000000000000000000
--- a/scripts/development-release.ts
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/usr/bin/env ts-node
-/**
- * Author: Huan LI <zixia@zixia.net>
- * https://github.com/zixia
- * License: Apache-2.0
- */
-import readPkgUp from 'read-pkg-up'
-import { minor } from 'semver'
-
-const pkg = readPkgUp.sync({ cwd: __dirname })!.package
-export const VERSION = pkg.version
-
-if (minor(VERSION) % 2 === 0) { // production release
-  console.log(`${VERSION} is production release`)
-  process.exit(1) // exit 1 for not development
-}
-
-// development release
-console.log(`${VERSION} is development release`)
-process.exit(0)
diff --git a/scripts/package-publish-config-tag-next.ts b/scripts/package-publish-config-tag-next.ts
deleted file mode 100755
index 5bf83f7171589d207568ae248b38b734dea00f04..0000000000000000000000000000000000000000
--- a/scripts/package-publish-config-tag-next.ts
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/usr/bin/env ts-node
-import * as fs    from 'fs'
-import * as path  from 'path'
-import readPkgUp  from 'read-pkg-up'
-
-const PACKAGE_JSON = path.join(__dirname, '../package.json')
-
-const pkg = readPkgUp.sync({ cwd: __dirname })!.package
-
-// pkg.publishConfig.tag = 'next'
-pkg.publishConfig = {
-  access: 'public',
-  ...pkg.publishConfig,
-  tag: 'next',
-}
-
-fs.writeFileSync(PACKAGE_JSON, JSON.stringify(pkg, null, 2))
-// console.log(JSON.stringify(pkg, null, 2))
-
-console.log('set package.json:publicConfig.tag to next.')
diff --git a/scripts/pre-push.sh b/scripts/pre-push.sh
deleted file mode 100755
index 3ba4505f832388da7e2f3ecf137508240dd4926c..0000000000000000000000000000000000000000
--- a/scripts/pre-push.sh
+++ /dev/null
@@ -1,56 +0,0 @@
-#!/bin/bash
-#
-# An example hook script to verify what is about to be committed.
-# Called by "git commit" with no arguments.  The hook should
-# exit with non-zero status after issuing an appropriate message if
-# it wants to stop the commit.
-#
-# To enable this hook, rename this file to "pre-commit".
-set -e
-
-[ -n "$NO_HOOK" ] && exit 0
-
-[ -n "$HUAN_INNER_PRE_HOOK" ] && {
-  # http://stackoverflow.com/a/21334985/1123955
-  exit 0
-}
-
-npm run lint
-
-[ -z "$CYGWIN" ] && {
-  # git rebase
-  rm -f package-lock.json
-  npm version patch --no-package-lock
-  HUAN_INNER_PRE_HOOK=1 git push
-
-  cat <<'_STR_'
-  ____ _ _        ____            _
- / ___(_) |_     |  _ \ _   _ ___| |__
-| |  _| | __|    | |_) | | | / __| '_ \
-| |_| | | |_     |  __/| |_| \__ \ | | |
- \____|_|\__|    |_|    \__,_|___/_| |_|
-
- ____                              _ _
-/ ___| _   _  ___ ___ ___  ___  __| | |
-\___ \| | | |/ __/ __/ _ \/ _ \/ _` | |
- ___) | |_| | (_| (_|  __/  __/ (_| |_|
-|____/ \__,_|\___\___\___|\___|\__,_(_)
-
-_STR_
-
-  echo
-  echo
-  echo
-  echo " ### Npm verion bumped and pushed by inner push inside hook pre-push ###"
-  echo " ------- vvvvvvv outer push will be canceled, never mind vvvvvvv -------"
-  echo
-  echo
-  echo
-  exit 127
-}
-
-# must run this after the above `test` ([ -z ...]),
-# or will whow a error: error: failed to push some refs to 'git@github.com:Chatie/wechaty.git'
-echo "PRE-PUSH HOOK PASSED"
-echo
-
diff --git a/tslint.json b/tslint.json
deleted file mode 100644
index fc87828cfbc220a00054d6572d86eb7453aeba15..0000000000000000000000000000000000000000
--- a/tslint.json
+++ /dev/null
@@ -1,21 +0,0 @@
-{
-  "rulesDirectory": [
-    "node_modules/@wwwouter/tslint-contrib"
-  ],
-  "extends": ["tslint:recommended", "tslint-config-standard"],
-  "rules": {
-    "interface-name": [true, "never-prefix"],
-    "trailing-comma": true,
-    "import-spacing": false,
-    "no-multi-spaces": false,
-    "no-console": false,
-    "space-within-parens": false,
-    "arrow-parens": false,
-    "max-line-length": false,
-    "unified-signatures": false,
-    "ter-indent": false,
-    "member-ordering": false,
-    "no-promise-as-boolean": true,
-    "typedef-whitespace": false
-  }
-}