diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 0967ef4..11fea0f 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1 +1 @@
-{}
+{".":"1.0.0"}
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..15696a5
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,20 @@
+# Changelog
+
+## 1.0.0 (2024-01-27)
+
+## What's Changed
+* ci: adding GitHub Actions linting workflow by @DeveloperC286 in https://github.com/DeveloperC286/zsh-simple-abbreviations/pull/4
+* docs: updating issues URL to GitHub by @DeveloperC286 in https://github.com/DeveloperC286/zsh-simple-abbreviations/pull/6
+* docs: removing GitLab CI/CD badges by @DeveloperC286 in https://github.com/DeveloperC286/zsh-simple-abbreviations/pull/7
+* ci: adding clean Git history GitHub action by @DeveloperC286 in https://github.com/DeveloperC286/zsh-simple-abbreviations/pull/8
+* docs: adding GitHub Release badge by @DeveloperC286 in https://github.com/DeveloperC286/zsh-simple-abbreviations/pull/9
+* ci: adding Conventional Commits linting by @DeveloperC286 in https://github.com/DeveloperC286/zsh-simple-abbreviations/pull/10
+* ci: adding release-please by @DeveloperC286 in https://github.com/DeveloperC286/zsh-simple-abbreviations/pull/13
+* ci: updating release-please language by @DeveloperC286 in https://github.com/DeveloperC286/zsh-simple-abbreviations/pull/14
+* perf: improving regex matching performance by @DeveloperC286 in https://github.com/DeveloperC286/zsh-simple-abbreviations/pull/17
+* refactor: quoting usage of environment variables by @DeveloperC286 in https://github.com/DeveloperC286/zsh-simple-abbreviations/pull/19
+* refactor: uppercasing global environment variable by @DeveloperC286 in https://github.com/DeveloperC286/zsh-simple-abbreviations/pull/20
+* refactor: converting to unset rather than remove by @DeveloperC286 in https://github.com/DeveloperC286/zsh-simple-abbreviations/pull/21
+
+
+**Full Changelog**: https://github.com/DeveloperC286/zsh-simple-abbreviations/compare/0.3.0...v1.0.0