diff --git a/.Rbuildignore b/.Rbuildignore
index 4e7d271..08a1cea 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -11,3 +11,4 @@
 ^codecov\.yml$
 ^data-raw$
 ^\.lintr$
+^CODE_OF_CONDUCT\.md$
diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index 652d936..64249c4 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -6,7 +6,7 @@ on:
   pull_request:
     branches: [main, master]
 
-name: R-CMD-check
+name: R-CMD-check.yaml
 
 permissions: read-all
 
diff --git a/.github/workflows/pkgdown.yaml b/.github/workflows/pkgdown.yaml
index c9f0165..4bbce75 100644
--- a/.github/workflows/pkgdown.yaml
+++ b/.github/workflows/pkgdown.yaml
@@ -9,7 +9,7 @@ on:
     types: [published]
   workflow_dispatch:
 
-name: pkgdown
+name: pkgdown.yaml
 
 permissions: read-all
 
diff --git a/.github/workflows/test-coverage.yaml b/.github/workflows/test-coverage.yaml
index f450c29..6882241 100644
--- a/.github/workflows/test-coverage.yaml
+++ b/.github/workflows/test-coverage.yaml
@@ -6,7 +6,7 @@ on:
   pull_request:
     branches: [main, master]
 
-name: test-coverage
+name: test-coverage.yaml
 
 permissions: read-all
 
diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
new file mode 100644
index 0000000..0f12e62
--- /dev/null
+++ b/CODE_OF_CONDUCT.md
@@ -0,0 +1,126 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, caste, color, religion, or sexual
+identity and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the overall
+  community
+
+Examples of unacceptable behavior include:
+
+* The use of sexualized language or imagery, and sexual attention or advances of
+  any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or email address,
+  without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at psychelzh@outlook.com. 
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series of
+actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or permanent
+ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior, harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within the
+community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.1, available at
+<https://www.contributor-covenant.org/version/2/1/code_of_conduct.html>.
+
+Community Impact Guidelines were inspired by
+[Mozilla's code of conduct enforcement ladder][https://github.com/mozilla/inclusion].
+
+For answers to common questions about this code of conduct, see the FAQ at
+<https://www.contributor-covenant.org/faq>. Translations are available at <https://www.contributor-covenant.org/translations>.
+
+[homepage]: https://www.contributor-covenant.org
diff --git a/DESCRIPTION b/DESCRIPTION
index 6c89f9b..38f597c 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: tarflow.iquizoo
 Title: Setup "targets" Workflows for "iquizoo" Data Processing
-Version: 3.12.3
+Version: 3.12.3.9000
 Authors@R: c(
     person("Liang", "Zhang", , "psychelzh@outlook.com", role = c("aut", "cre"),
            comment = c(ORCID = "0000-0001-9041-1150")),
diff --git a/NEWS.md b/NEWS.md
index 24a2c24..a65f590 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,5 @@
+# tarflow.iquizoo (development version)
+
 # tarflow.iquizoo 3.12.3
 
 ## Upkeep
diff --git a/R/tarflow.iquizoo-package.R b/R/tarflow.iquizoo-package.R
new file mode 100644
index 0000000..d248733
--- /dev/null
+++ b/R/tarflow.iquizoo-package.R
@@ -0,0 +1,7 @@
+#' @keywords internal
+"_PACKAGE"
+
+## usethis namespace: start
+#' @import rlang
+## usethis namespace: end
+NULL
diff --git a/R/zzz.R b/R/zzz.R
index cf57234..831766f 100644
--- a/R/zzz.R
+++ b/R/zzz.R
@@ -1,6 +1,3 @@
-#' @import rlang
-NULL
-
 # nocov start
 
 .onLoad <- function(libname, pkgname) {
diff --git a/README.Rmd b/README.Rmd
index 54e31af..a411919 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -19,7 +19,7 @@ knitr::opts_chunk$set(
 [![Lifecycle: stable](https://img.shields.io/badge/lifecycle-stable-brightgreen.svg)](https://lifecycle.r-lib.org/articles/stages.html#stable)
 [![tarflow.iquizoo status badge](https://psychelzh.r-universe.dev/badges/tarflow.iquizoo)](https://psychelzh.r-universe.dev/tarflow.iquizoo)
 [![R-CMD-check](https://github.com/psychelzh/tarflow.iquizoo/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/psychelzh/tarflow.iquizoo/actions/workflows/R-CMD-check.yaml)
-[![Codecov test coverage](https://codecov.io/gh/psychelzh/tarflow.iquizoo/branch/main/graph/badge.svg)](https://app.codecov.io/gh/psychelzh/tarflow.iquizoo?branch=main)
+[![Codecov test coverage](https://codecov.io/gh/psychelzh/tarflow.iquizoo/graph/badge.svg)](https://app.codecov.io/gh/psychelzh/tarflow.iquizoo)
 <!-- badges: end -->
 
 The goal of tarflow.iquizoo is to provide workflow auto-generation for IQUIZOO data powered by [targets](https://github.com/ropensci/targets) package.
@@ -46,3 +46,7 @@ install.packages("tarflow.iquizoo", repos = c(getOption("repos"), "https://psych
 ## Usage
 
 This simplest way to use this package is to call `tarflow.iquizoo::use_targets_pipeline()` to generate a {[targets](https://docs.ropensci.org/targets/)} pipeline. After some basic parameters edit (follow the generated script), then you can run the pipeline by executing `targets::tar_make()` in R console. The pipeline will be executed in parallel by default.
+
+## Code of Conduct
+
+Please note that the tarflow.iquizoo project is released with a [Contributor Code of Conduct](https://psychelzh.github.io/tarflow.iquizoo/CODE_OF_CONDUCT.html). By contributing to this project, you agree to abide by its terms
diff --git a/README.md b/README.md
index dc34e53..2c08c93 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ stable](https://img.shields.io/badge/lifecycle-stable-brightgreen.svg)](https://
 badge](https://psychelzh.r-universe.dev/badges/tarflow.iquizoo)](https://psychelzh.r-universe.dev/tarflow.iquizoo)
 [![R-CMD-check](https://github.com/psychelzh/tarflow.iquizoo/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/psychelzh/tarflow.iquizoo/actions/workflows/R-CMD-check.yaml)
 [![Codecov test
-coverage](https://codecov.io/gh/psychelzh/tarflow.iquizoo/branch/main/graph/badge.svg)](https://app.codecov.io/gh/psychelzh/tarflow.iquizoo?branch=main)
+coverage](https://codecov.io/gh/psychelzh/tarflow.iquizoo/graph/badge.svg)](https://app.codecov.io/gh/psychelzh/tarflow.iquizoo)
 <!-- badges: end -->
 
 The goal of tarflow.iquizoo is to provide workflow auto-generation for
@@ -56,3 +56,10 @@ This simplest way to use this package is to call
 basic parameters edit (follow the generated script), then you can run
 the pipeline by executing `targets::tar_make()` in R console. The
 pipeline will be executed in parallel by default.
+
+## Code of Conduct
+
+Please note that the tarflow.iquizoo project is released with a
+[Contributor Code of
+Conduct](https://psychelzh.github.io/tarflow.iquizoo/CODE_OF_CONDUCT.html).
+By contributing to this project, you agree to abide by its terms
diff --git a/man/tarflow.iquizoo-package.Rd b/man/tarflow.iquizoo-package.Rd
new file mode 100644
index 0000000..6605b17
--- /dev/null
+++ b/man/tarflow.iquizoo-package.Rd
@@ -0,0 +1,29 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/tarflow.iquizoo-package.R
+\docType{package}
+\name{tarflow.iquizoo-package}
+\alias{tarflow.iquizoo}
+\alias{tarflow.iquizoo-package}
+\title{tarflow.iquizoo: Setup "targets" Workflows for "iquizoo" Data Processing}
+\description{
+For "iquizoo" data processing, there is already a package called "preproc.iquizoo", but eventually the use of it is relied on a workflow. This package is used to build such workflows based on tools provided by "targets" package which mimics the logic of "make", automating the building processes.
+}
+\seealso{
+Useful links:
+\itemize{
+  \item \url{https://psychelzh.github.io/tarflow.iquizoo/}
+  \item \url{https://github.com/psychelzh/tarflow.iquizoo}
+  \item Report bugs at \url{https://github.com/psychelzh/tarflow.iquizoo/issues}
+}
+
+}
+\author{
+\strong{Maintainer}: Liang Zhang \email{psychelzh@outlook.com} (\href{https://orcid.org/0000-0001-9041-1150}{ORCID})
+
+Other contributors:
+\itemize{
+  \item Yujian Dai [contributor]
+}
+
+}
+\keyword{internal}