diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index f3bc6d25..6c562350 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -25,10 +25,6 @@ jobs:
 
     env:
       repo_url: ${{ github.server_url }}/${{ github.repository }}
-      changelog: CHANGELOG.md
-      release_changelog: RELEASE_CHANGELOG.md
-      start_regex: "^## \\[Unreleased\\]"
-      end_regex: "^## "
 
     steps:
       - name: Checkout repo
@@ -100,4 +96,4 @@ jobs:
         env:
           LOGIN_NAME: Polyhedral-Bot
           LOGIN_EMAIL: polybot@protonmail.com
-          ACCESS_TOKEN: ${{ secrets.POLYBOT }}
+          ACCESS_TOKEN: ${{ secrets.POLYBOT }}
\ No newline at end of file
diff --git a/.scripts/check-version-bump.sh b/.scripts/check-version-bump.sh
index 657aee7d..89204033 100755
--- a/.scripts/check-version-bump.sh
+++ b/.scripts/check-version-bump.sh
@@ -1,7 +1,8 @@
 #!/bin/bash
 
+source .scripts/vars.sh
+
 # Search HEAD diff for a change in the pack version
-PACK_MANIFEST=pack.yml
 version_diff=$(git diff HEAD^ HEAD "$PACK_MANIFEST" | grep '^+version: ')
 previous_version_diff=$(git diff HEAD^ HEAD "$PACK_MANIFEST" | grep '^-version: ')
 
@@ -18,4 +19,4 @@ else
     echo "version-bumped=true" >> "$GITHUB_ENV"
     echo "previous_version=$previous_version" >> "$GITHUB_ENV"
     echo "version=$version" >> "$GITHUB_ENV"
-fi
+fi
\ No newline at end of file
diff --git a/.scripts/grab-release-changelog.sh b/.scripts/grab-release-changelog.sh
index e4307bbb..403cfe04 100755
--- a/.scripts/grab-release-changelog.sh
+++ b/.scripts/grab-release-changelog.sh
@@ -2,15 +2,19 @@
 
 # Grabs the unreleased section from the changelog, and cleans it up for publication
 
+source .scripts/lib.sh
+source .scripts/vars.sh
+ensure_file "$CHANGELOG"
+
 # Copy unreleased changelog to temporary file
 echo '- Extracting unreleased changelog'
-sed "0,/$start_regex/ d; /$end_regex/,$ d" $changelog > $release_changelog
+sed "0,/$UNRELEASED_SECTION_START_REGEX/ d; /$UNRELEASED_SECTION_END_REGEX/,$ d" $CHANGELOG > $RELEASE_CHANGELOG
 
 # Remove unused subheadings from new changelog
 echo '- Stripping empty titles from changelog'
 echo "$(awk '/^$/ {if (i) {b=b $0 "\n"} else {print $0 }; next} \
-    /^###/ {i=1; b=$0; next} {if (i) {print b}; i=0; print $0; next}' $release_changelog)" > $release_changelog 
+    /^###/ {i=1; b=$0; next} {if (i) {print b}; i=0; print $0; next}' $RELEASE_CHANGELOG)" > $RELEASE_CHANGELOG 
 
-if ! grep -q '[^[:space:]]' "$release_changelog"; then
+if ! grep -q '[^[:space:]]' "$RELEASE_CHANGELOG"; then
     echo '- WARNING: Unreleased changelog is empty!'
 fi
diff --git a/.scripts/lib.sh b/.scripts/lib.sh
new file mode 100644
index 00000000..10156bf0
--- /dev/null
+++ b/.scripts/lib.sh
@@ -0,0 +1,37 @@
+ensure_env() {
+    local var_name="$1"
+    if [ -z "${!var_name}" ]; then
+        echo "Environment variable '$var_name' is not defined, aborting..."
+        exit 1
+    fi
+}
+
+ensure_file() {
+    if [ ! -f "$1" ]; then
+        echo "No file found $1"
+        exit 1
+    fi
+}
+
+delete_between() {
+    local file="$1"
+    local start_regex="$2"
+    local end_regex="$3"
+    sed -i "/$start_regex/,/$end_regex/{//!d}" "$file"
+}
+
+append_after() {
+    local file="$1"
+    local regex="$2"
+    local text="${3//$'\n'/\\$'\n'}" # Escape newlines in text
+    sed -i "/$regex/a $text" "$file"
+}
+
+replace_in_file() {
+    local file="$1"
+    local start_regex="$2"
+    local end_regex="$3"
+    local text="$4"
+    delete_between "$file" "$start_regex" "$end_regex"
+    append_after "$file" "$start_regex" "$text"
+}
\ No newline at end of file
diff --git a/.scripts/update-changelog.sh b/.scripts/update-changelog.sh
index 6b8c2507..12be53a1 100755
--- a/.scripts/update-changelog.sh
+++ b/.scripts/update-changelog.sh
@@ -2,35 +2,44 @@
 
 # Moves unreleased section to a new version release section, and updates anchors at the bottom of the changelog
 
-echo "Updating $changelog for v$version:"
-
-echo '- Inserting release changelog'
-sed -i "/$start_regex/,/$end_regex/{//!d}" $changelog
-sed -i "/$start_regex/ {
-        a ### Added
-        a
-        a
-        a ### Changed
-        a
-        a
-        a ### Removed
-        a
-        a
-        a ### Fixed
-        a
-        a
-        a ## [v$version]
-        r $release_changelog
-        a
-    }" $changelog
+source .scripts/lib.sh
+source .scripts/vars.sh
+ensure_env "version"
+ensure_env "previous_version"
+ensure_env "repo_url"
+ensure_file "$CHANGELOG"
+ensure_file "$RELEASE_CHANGELOG"
+
+echo "Updating $CHANGELOG for v$version:"
+
+echo '- Clearing unreleased section'
+replace_in_file "$CHANGELOG" "$UNRELEASED_SECTION_START_REGEX" "$UNRELEASED_SECTION_END_REGEX" "\
+### Added
+
+
+### Changed
+
+
+### Removed
+
+
+### Fixed
+
+"
+
+echo "- Inserting new version section"
+append_after "$CHANGELOG" "$VERSIONS_SECTION_START_REGEX" "
+
+## [v$version]
+$(cat $RELEASE_CHANGELOG)"
 
 echo '- Adding new version anchor'
-sed -i "/^\[Unreleased]/a [v$version]: $repo_url/compare/v$previous_version...v$version" $changelog
+sed -i "/^\[Unreleased]/a [v$version]: $repo_url/compare/v$previous_version...v$version" $CHANGELOG
 
 echo '- Updating unreleased anchor'
-sed -i "s|^\[Unreleased\]: .*|[Unreleased]: $repo_url/compare/v$version...HEAD|" $changelog
+sed -i "s|^\[Unreleased\]: .*|[Unreleased]: $repo_url/compare/v$version...HEAD|" $CHANGELOG
 
 echo "v$version changelog:"
 echo '---'
-cat $release_changelog 
-echo '---'
+cat $RELEASE_CHANGELOG 
+echo '---'
\ No newline at end of file
diff --git a/.scripts/vars.sh b/.scripts/vars.sh
new file mode 100644
index 00000000..c5dde14d
--- /dev/null
+++ b/.scripts/vars.sh
@@ -0,0 +1,6 @@
+CHANGELOG="CHANGELOG.md"
+RELEASE_CHANGELOG="RELEASE_CHANGELOG.md"
+PACK_MANIFEST="pack.yml"
+UNRELEASED_SECTION_START_REGEX="^## \\[Unreleased\\]"
+UNRELEASED_SECTION_END_REGEX="^<!--"
+VERSIONS_SECTION_START_REGEX="^-->"