diff --git a/lib/fun_core/basic_signup_whitelist.ex b/lib/fun_core/basic_signup_whitelist.ex
deleted file mode 100644
index 33dc034..0000000
--- a/lib/fun_core/basic_signup_whitelist.ex
+++ /dev/null
@@ -1,19 +0,0 @@
-defmodule FunCore.BasicSignupAllowlist do
-  def normalize(email) do
-    email |> String.trim() |> String.downcase()
-  end
-
-  def addresses_as_list(addresses_str) do
-    addresses_str
-    |> String.split(",")
-    |> Enum.map(&normalize/1)
-  end
-
-  def mail_allowlisted_fun(signups_allowed, email_received) do
-    case signups_allowed do
-      nil -> false
-      "*" -> true
-      list_str -> normalize(email_received) in addresses_as_list(list_str)
-    end
-  end
-end
diff --git a/plan.md b/plan.md
index 50e0770..46db377 100644
--- a/plan.md
+++ b/plan.md
@@ -1,17 +1,17 @@
-# whitelist sketch
+# allowlist sketch
 
-Here's a complete Mix project structure with the email whitelist functionality and tests:
+Here's a complete Mix project structure with the email allowlist functionality and tests:
 
 ## Project Structure
 
 ```
-email_whitelist_test/
+email_allowlist_test/
 ├── config
 │   └── config.exs
 ├── lib
-│   └── email_whitelist.ex
+│   └── email_allowlist.ex
 ├── test
-│   ├── email_whitelist_test.exs
+│   ├── email_allowlist_test.exs
 │   └── test_helper.exs
 ├── mix.exs
 └── README.md
@@ -25,7 +25,7 @@ defmodule EmailWhitelistTest.MixProject do
 
   def project do
     [
-      app: :email_whitelist_test,
+      app: :email_allowlist_test,
       version: "0.1.0",
       elixir: "~> 1.14",
       start_permanent: Mix.env() == :prod,
@@ -47,11 +47,11 @@ end
 import Config
 
 # Configure your application
-config :email_whitelist_test, :allowed_emails,
+config :email_allowlist_test, :allowed_emails,
   ["user@domain.com", "admin@example.org"]
 ```
 
-## 3. `lib/email_whitelist.ex` - Main Implementation
+## 3. `lib/email_allowlist.ex` - Main Implementation
 
 ```elixir
 defmodule EmailWhitelist do
@@ -64,10 +64,10 @@ defmodule EmailWhitelist do
     - Returns false if:
         * Environment variable doesn't exist
         * Environment variable is empty string
-        * Email not found in whitelist
+        * Email not found in allowlist
   """
 
-  def mail_whitelisted(email) do
+  def mail_allowlisted(email) do
     normalized_email = String.downcase(email)
     env_var = System.get_env("ALLOWED_EMAILS")
 
@@ -94,13 +94,13 @@ end
 ExUnit.start()
 ```
 
-## 5. `test/email_whitelist_test.exs` - Test Cases
+## 5. `test/email_allowlist_test.exs` - Test Cases
 
 ```elixir
 defmodule EmailWhitelistTest do
   use ExUnit.Case, async: true
 
-  describe "mail_whitelisted/1" do
+  describe "mail_allowlisted/1" do
     setup do
       # Save original env var
       original_env = System.get_env("ALLOWED_EMAILS")
@@ -119,59 +119,59 @@ defmodule EmailWhitelistTest do
     test "allows all emails when ALLOWED_EMAILS is '*'" do
       System.put_env("ALLOWED_EMAILS", "*")
       
-      assert EmailWhitelist.mail_whitelisted("any@example.com") == true
-      assert EmailWhitelist.mail_whitelisted("user@domain.com") == true
-      assert EmailWhitelist.mail_whitelisted("test@test.co.uk") == true
+      assert EmailWhitelist.mail_allowlisted("any@example.com") == true
+      assert EmailWhitelist.mail_allowlisted("user@domain.com") == true
+      assert EmailWhitelist.mail_allowlisted("test@test.co.uk") == true
     end
 
-    test "allows whitelisted emails" do
+    test "allows allowlisted emails" do
       System.put_env("ALLOWED_EMAILS", "user@domain.com,admin@example.org")
       
-      assert EmailWhitelist.mail_whitelisted("user@domain.com") == true
-      assert EmailWhitelist.mail_whitelisted("ADMIN@EXAMPLE.ORG") == true
-      assert EmailWhitelist.mail_whitelisted("User@Domain.Com") == true
+      assert EmailWhitelist.mail_allowlisted("user@domain.com") == true
+      assert EmailWhitelist.mail_allowlisted("ADMIN@EXAMPLE.ORG") == true
+      assert EmailWhitelist.mail_allowlisted("User@Domain.Com") == true
     end
 
-    test "rejects non-whitelisted emails" do
+    test "rejects non-allowlisted emails" do
       System.put_env("ALLOWED_EMAILS", "user@domain.com,admin@example.org")
       
-      assert EmailWhitelist.mail_whitelisted("invalid@example.com") == false
-      assert EmailWhitelist.mail_whitelisted("test@test.co.uk") == false
+      assert EmailWhitelist.mail_allowlisted("invalid@example.com") == false
+      assert EmailWhitelist.mail_allowlisted("test@test.co.uk") == false
     end
 
     test "rejects when ALLOWED_EMAILS is nil" do
       System.delete_env("ALLOWED_EMAILS")
       
-      assert EmailWhitelist.mail_whitelisted("any@example.com") == false
+      assert EmailWhitelist.mail_allowlisted("any@example.com") == false
     end
 
     test "rejects when ALLOWED_EMAILS is empty string" do
       System.put_env("ALLOWED_EMAILS", "")
       
-      assert EmailWhitelist.mail_whitelisted("any@example.com") == false
+      assert EmailWhitelist.mail_allowlisted("any@example.com") == false
     end
 
-    test "handles whitespace in email list" do
+    test "handles allowspace in email list" do
       System.put_env("ALLOWED_EMAILS", " user@domain.com , admin@example.org , test@test.co.uk ")
       
-      assert EmailWhitelist.mail_whitelisted("user@domain.com") == true
-      assert EmailWhitelist.mail_whitelisted("ADMIN@EXAMPLE.ORG") == true
-      assert EmailWhitelist.mail_whitelisted("test@test.co.uk") == true
-      assert EmailWhitelist.mail_whitelisted("invalid@example.com") == false
+      assert EmailWhitelist.mail_allowlisted("user@domain.com") == true
+      assert EmailWhitelist.mail_allowlisted("ADMIN@EXAMPLE.ORG") == true
+      assert EmailWhitelist.mail_allowlisted("test@test.co.uk") == true
+      assert EmailWhitelist.mail_allowlisted("invalid@example.com") == false
     end
 
     test "case insensitive matching works" do
       System.put_env("ALLOWED_EMAILS", "User@Domain.Com,ADMIN@EXAMPLE.ORG")
       
-      assert EmailWhitelist.mail_whitelisted("user@domain.com") == true
-      assert EmailWhitelist.mail_whitelisted("USER@DOMAIN.COM") == true
-      assert EmailWhitelist.mail_whitelisted("admin@example.org") == true
+      assert EmailWhitelist.mail_allowlisted("user@domain.com") == true
+      assert EmailWhitelist.mail_allowlisted("USER@DOMAIN.COM") == true
+      assert EmailWhitelist.mail_allowlisted("admin@example.org") == true
     end
 
     test "empty email returns false" do
       System.put_env("ALLOWED_EMAILS", "user@domain.com")
       
-      assert EmailWhitelist.mail_whitelisted("") == false
+      assert EmailWhitelist.mail_allowlisted("") == false
     end
   end
 end
@@ -182,24 +182,24 @@ end
 ```markdown
 # EmailWhitelistTest
 
-A simple Mix project demonstrating email whitelist functionality.
+A simple Mix project demonstrating email allowlist functionality.
 
 ## Installation
 
 If [available in Hex](https://hex.pm/docs/publish), the package can be installed
-by adding `email_whitelist_test` to your list of dependencies in `mix.exs`:
+by adding `email_allowlist_test` to your list of dependencies in `mix.exs`:
 
 ```elixir
 def deps do
   [
-    {:email_whitelist_test, "~> 0.1.0"}
+    {:email_allowlist_test, "~> 0.1.0"}
   ]
 end
 ```
 
 ## Usage
 
-The main function is `EmailWhitelist.mail_whitelisted/1` which checks if an email address is allowed.
+The main function is `EmailWhitelist.mail_allowlisted/1` which checks if an email address is allowed.
 
 Environment variable configuration:
 - `ALLOWED_EMAILS="*"` - Allow all emails
@@ -221,8 +221,8 @@ MIT
 
 1. **Create the project structure:**
    ```bash
-   mkdir email_whitelist_test
-   cd email_whitelist_test
+   mkdir email_allowlist_test
+   cd email_allowlist_test
    ```
 
 2. **Create all files with the content above**
@@ -251,7 +251,7 @@ Finished in 0.05 seconds (0.04s async, 0.01s sync)
 The tests cover all your specified requirements:
 - ✅ All emails allowed when `ALLOWED_EMAILS="*"`
 - ✅ Specific emails allowed when in list
-- ✅ Non-whitelisted emails rejected
+- ✅ Non-allowlisted emails rejected
 - ✅ Missing environment variable handled properly
 - ✅ Empty environment variable handled properly
 - ✅ Whitespace trimming in email lists
@@ -272,7 +272,7 @@ You can easily switch from a local path dependency to a git dependency by simply
 ```elixir
 def deps do
   [
-    {:email_whitelist_test, path: "../email_whitelist_test"}
+    {:email_allowlist_test, path: "../email_allowlist_test"}
   ]
 end
 ```
@@ -281,7 +281,7 @@ end
 ```elixir
 def deps do
   [
-    {:email_whitelist_test, git: "https://github.com/yourusername/email_whitelist_test.git"}
+    {:email_allowlist_test, git: "https://github.com/yourusername/email_allowlist_test.git"}
   ]
 end
 ```
@@ -292,7 +292,7 @@ After changing the dependency specification:
 
 ```bash
 # Remove the old dependency
-mix deps.clean email_whitelist_test
+mix deps.clean email_allowlist_test
 
 # Fetch the new git dependency
 mix deps.get
@@ -302,21 +302,21 @@ mix deps.get
 
 ### Specify a Branch or Tag:
 ```elixir
-{:email_whitelist_test, 
- git: "https://github.com/yourusername/email_whitelist_test.git",
+{:email_allowlist_test, 
+ git: "https://github.com/yourusername/email_allowlist_test.git",
  branch: "main"}
 
 # Or for a specific tag
-{:email_whitelist_test, 
- git: "https://github.com/yourusername/email_whitelist_test.git",
+{:email_allowlist_test, 
+ git: "https://github.com/yourusername/email_allowlist_test.git",
  tag: "v1.0.0"}
 ```
 
 ### For Private Repositories:
 ```elixir
-{:email_whitelist_test, 
- git: "https://github.com/yourusername/email_whitelist_test.git",
- github: "yourusername/email_whitelist_test",
+{:email_allowlist_test, 
+ git: "https://github.com/yourusername/email_allowlist_test.git",
+ github: "yourusername/email_allowlist_test",
  branch: "main"}
 ```
 
@@ -326,7 +326,7 @@ mix deps.get
 ```elixir
 def deps do
   [
-    {:email_whitelist_test, path: "../email_whitelist_test"}
+    {:email_allowlist_test, path: "../email_allowlist_test"}
   ]
 end
 ```
@@ -335,8 +335,8 @@ end
 ```elixir
 def deps do
   [
-    {:email_whitelist_test, 
-     git: "https://github.com/yourusername/email_whitelist_test.git",
+    {:email_allowlist_test, 
+     git: "https://github.com/yourusername/email_allowlist_test.git",
      branch: "main"}
   ]
 end
@@ -352,7 +352,7 @@ end
 ## Important Notes:
 
 - **No code changes needed** - your existing imports and usage remain identical
-- **Same module names** - `EmailWhitelist.mail_whitelisted/1` works the same
+- **Same module names** - `EmailWhitelist.mail_allowlisted/1` works the same
 - **Same function signatures** - no API changes required
 - **Cache cleared** - you'll need to run `mix deps.get` to fetch the new version
 
@@ -360,7 +360,7 @@ end
 
 ```bash
 # Edit your mix.exs file, then:
-mix deps.clean email_whitelist_test
+mix deps.clean email_allowlist_test
 mix deps.get
 ```
 
diff --git a/rename_module.sh b/rename_module.sh
index 8e6b5e8..579052f 100755
--- a/rename_module.sh
+++ b/rename_module.sh
@@ -2,45 +2,101 @@
 
 # Script to rename BasicSignupWhitelist module to BasicSignupAllowlist
 # This includes renaming files, module names, function names, and all references
+# Works recursively through all subdirectories
 
 echo "Starting module rename from Whitelist to Allowlist..."
+echo ""
 
-# 1. Rename the files
-echo "Renaming files..."
-if [ -f "lib/basic_signup_whitelist.ex" ]; then
-    mv lib/basic_signup_whitelist.ex lib/basic_signup_allowlist.ex
-    echo "  ✓ Renamed lib/basic_signup_whitelist.ex to lib/basic_signup_allowlist.ex"
-fi
+# Counter for renamed files
+renamed_count=0
 
-if [ -f "test/basic_signup_whitelist_test.exs" ]; then
-    mv test/basic_signup_whitelist_test.exs test/basic_signup_allowlist_test.exs
-    echo "  ✓ Renamed test/basic_signup_whitelist_test.exs to test/basic_signup_allowlist_test.exs"
-fi
+# 1. Find and rename ALL files containing "whitelist" recursively
+echo "Finding and renaming files recursively..."
+echo "----------------------------------------"
 
-# 2. Replace all occurrences of BasicSignupWhitelist with BasicSignupAllowlist
-echo "Updating module names..."
-find . -type f \( -name "*.ex" -o -name "*.exs" \) -exec sed -i 's/BasicSignupWhitelist/BasicSignupAllowlist/g' {} +
-echo "  ✓ Updated module names from BasicSignupWhitelist to BasicSignupAllowlist"
+# Use find to locate all files with whitelist in the name
+# Process deepest files first to avoid path issues
+while IFS= read -r -d '' file; do
+    dir=$(dirname "$file")
+    filename=$(basename "$file")
+    newname="${filename//whitelist/allowlist}"
+    newname="${newname//Whitelist/Allowlist}"
 
-# 3. Replace function names (mail_whitelisted -> mail_allowlisted)
-echo "Updating function names..."
-find . -type f \( -name "*.ex" -o -name "*.exs" \) -exec sed -i 's/mail_whitelisted/mail_allowlisted/g' {} +
-echo "  ✓ Updated function names from mail_whitelisted to mail_allowlisted"
+    if [ "$filename" != "$newname" ]; then
+        mv "$file" "$dir/$newname"
+        echo "  ✓ Renamed: $file → $dir/$newname"
+        ((renamed_count++))
+    fi
+done < <(find . -type f \( -name "*whitelist*" -o -name "*Whitelist*" \) \( -name "*.ex" -o -name "*.exs" \) -print0 | sort -zr)
 
-# 4. Replace any remaining "whitelist" references in comments/docs with "allowlist"
-echo "Updating remaining whitelist references..."
-find . -type f \( -name "*.ex" -o -name "*.exs" \) -exec sed -i 's/whitelist/allowlist/g' {} +
-echo "  ✓ Updated all remaining references from whitelist to allowlist"
-
-# 5. Update any references to the old filenames in mix.exs or other config files
-echo "Checking for filename references in config files..."
-if [ -f "mix.exs" ]; then
-    sed -i 's/basic_signup_whitelist/basic_signup_allowlist/g' mix.exs
-    echo "  ✓ Updated references in mix.exs"
+if [ $renamed_count -eq 0 ]; then
+    echo "  No files needed renaming"
 fi
 
 echo ""
-echo "Module rename complete! You may want to:"
-echo "  1. Run 'mix test' to ensure all tests still pass"
-echo "  2. Run 'mix compile --force' to recompile with the new module names"
-echo "  3. Check any documentation or README files for references to update"
\ No newline at end of file
+
+# 2. Replace all occurrences of BasicSignupWhitelist with BasicSignupAllowlist
+echo "Updating module names in all .ex and .exs files..."
+echo "---------------------------------------------------"
+find . -type f \( -name "*.ex" -o -name "*.exs" \) ! -path "./_build/*" ! -path "./deps/*" -exec sed -i 's/BasicSignupWhitelist/BasicSignupAllowlist/g' {} +
+echo "  ✓ Updated module names from BasicSignupWhitelist to BasicSignupAllowlist"
+
+# 3. Replace function names (mail_whitelisted -> mail_allowlisted)
+echo ""
+echo "Updating function names..."
+echo "--------------------------"
+find . -type f \( -name "*.ex" -o -name "*.exs" \) ! -path "./_build/*" ! -path "./deps/*" -exec sed -i 's/mail_whitelisted/mail_allowlisted/g' {} +
+echo "  ✓ Updated function names from mail_whitelisted to mail_allowlisted"
+
+# 4. Replace case-sensitive variations of whitelist/allowlist
+echo ""
+echo "Updating all whitelist references (case-sensitive)..."
+echo "-----------------------------------------------------"
+find . -type f \( -name "*.ex" -o -name "*.exs" \) ! -path "./_build/*" ! -path "./deps/*" -exec sed -i 's/whitelist/allowlist/g' {} +
+find . -type f \( -name "*.ex" -o -name "*.exs" \) ! -path "./_build/*" ! -path "./deps/*" -exec sed -i 's/Whitelist/Allowlist/g' {} +
+find . -type f \( -name "*.ex" -o -name "*.exs" \) ! -path "./_build/*" ! -path "./deps/*" -exec sed -i 's/WHITELIST/ALLOWLIST/g' {} +
+echo "  ✓ Updated all case variations of whitelist to allowlist"
+
+# 5. Update references in config files (mix.exs, README.md, etc.)
+echo ""
+echo "Updating references in configuration and documentation files..."
+echo "--------------------------------------------------------------"
+for file in mix.exs README.md CLAUDE.md .formatter.exs; do
+    if [ -f "$file" ]; then
+        sed -i 's/whitelist/allowlist/g' "$file"
+        sed -i 's/Whitelist/Allowlist/g' "$file"
+        sed -i 's/WHITELIST/ALLOWLIST/g' "$file"
+        echo "  ✓ Updated references in $file"
+    fi
+done
+
+# 6. Clean up old build artifacts
+echo ""
+echo "Cleaning up old build artifacts..."
+echo "----------------------------------"
+if [ -d "_build" ]; then
+    # Find and remove directories with whitelist in the name
+    find _build -type d -name "*whitelist*" -exec rm -rf {} + 2>/dev/null
+    echo "  ✓ Removed old build directories containing 'whitelist'"
+    echo "  Note: Run 'mix clean' and 'mix compile' to rebuild completely"
+else
+    echo "  No _build directory found"
+fi
+
+# 7. Show summary of changes
+echo ""
+echo "============================================"
+echo "Module rename complete!"
+echo "============================================"
+echo ""
+echo "Summary:"
+echo "  - Renamed $renamed_count file(s)"
+echo "  - Updated all module and function references"
+echo "  - Cleaned build artifacts"
+echo ""
+echo "Recommended next steps:"
+echo "  1. Run 'mix clean' to clean all build artifacts"
+echo "  2. Run 'mix deps.get' if you have dependencies"
+echo "  3. Run 'mix compile --force' to recompile with new module names"
+echo "  4. Run 'mix test' to ensure all tests still pass"
+echo "  5. Commit these changes to version control"
\ No newline at end of file
diff --git a/test/fun_core/basic_signup_whitelist_test.exs b/test/fun_core/basic_signup_whitelist_test.exs
deleted file mode 100644
index 4e2018e..0000000
--- a/test/fun_core/basic_signup_whitelist_test.exs
+++ /dev/null
@@ -1,40 +0,0 @@
-defmodule FunCore.BasicSignupAllowlistTest do
-  use ExUnit.Case
-  import FunCore.BasicSignupAllowlist
-
-  test "addresses_as_list" do
-    assert addresses_as_list("joe@example.com, jane@example.com") == [
-             "joe@example.com",
-             "jane@example.com"
-           ]
-  end
-
-  test "jane in list" do
-    lst = addresses_as_list("joe@example.com, jane@example.com")
-    assert "jane@example.com" in lst
-  end
-
-  describe "Not allowlisted when allowed list is" do
-    test "not set" do
-      refute(mail_allowlisted_fun(nil, "joe@example.com"))
-    end
-
-    test "empty" do
-      refute(mail_allowlisted_fun("j", "joe@example.com"))
-    end
-  end
-
-  describe "Whitelisted when" do
-    test "*" do
-      assert(mail_allowlisted_fun("*", "jane@example.com"))
-    end
-
-    test "Multiple set and one match" do
-      assert(mail_allowlisted_fun("joe@example.com, jane@example.com", "jane@example.com"))
-    end
-
-    test "Matches with different casings" do
-      assert(mail_allowlisted_fun("joe@Example.com, jane@example.com", "Joe@example.com"))
-    end
-  end
-end