All notable changes to this project will be documented in this file, per the Keep a Changelog standard, and will adhere to Semantic Versioning.

• Provide CSRF hardening for Mailchimp List changes (props @iamdharmesh, @joemcgill, @dkotter, @qasumitbagthariya).
• Plugin check plugin errors to improve overall codebase (props @iamdharmesh, @joemcgill, @dkotter, @qasumitbagthariya).

• Bump WordPress "tested up to" version 6.9 (props @iamdharmesh, @joemcgill, @qasumitbagthariya).

• Form templates to the Mailchimp List Subscribe Form block, allowing users to quickly insert and publish specific forms (props @iamdharmesh, Romain Deville, @vikrampm1, @jeffpaul, @dkotter, @qasumitbagthariya via #171).

• Improved navigation and UX enhancements to the plugin settings page (props @iamdharmesh, Romain Deville, @jeffpaul, @dkotter, @qasumitbagthariya via #169).
• Allowed multiple Mailchimp forms on a single page (props @iamdharmesh, @jeffpaul, @dkotter, @qasumitbagthariya via #173).
• Update the form ID attribute and form field ID attributes (if you're using ID selectors for custom styling, please update the selectors accordingly) (props @iamdharmesh, @jeffpaul, @dkotter, @qasumitbagthariya via #173).

• Phone number and required field validations (props @iamdharmesh, @MaxwellGarceau, @jeffpaul, @dkotter, @qasumitbagthariya via #159).

• Bump tar-fs from 2.1.1 to 3.1.0 (props @dependabot, @iamdharmesh via #175).
• Bump form-data from 2.3.3 to 2.5.5 and @cypress/request from 3.0.1 to 3.0.9 (props @dependabot, @iamdharmesh via #176).
• Bump @babel/runtime from 7.24.6 to 7.28.2 (props @dependabot, @iamdharmesh via #177).
• Bump on-headers from 1.0.2 to 1.1.0 and compression from 1.7.4 to 1.8.1 (props @dependabot, @iamdharmesh via #178).
• Bump serialize-javascript from 6.0.0 to 6.0.2 and mocha from 10.4.0 to 11.7.1 (props @dependabot, @iamdharmesh via #179).
• Bump http-proxy-middleware from 2.0.6 to 2.0.9 (props @dependabot, @iamdharmesh via #180).

• Update 10up-toolkit from 6.2.0 to 6.5.0 (props @iamdharmesh, @dkotter via #174).

• Provide CSRF hardening for Mailchimp List changes (props @iamdharmesh, @joemcgill, @dkotter, @qasumitbagthariya).

• New user synchronization feature that allows syncing WordPress users to Mailchimp (props @iamdharmesh, @jeffpaul, @dkotter, @qasumitbagthariya via #156).

• Improved the enqueueing of JavaScript scripts and styles (props @iamdharmesh, @dkotter, @qasumitbagthariya via #161).

• Provide CSRF hardening for Mailchimp List changes (props @iamdharmesh, @joemcgill, @dkotter, @qasumitbagthariya).

Note that this release bumps the WordPress minimum version from 6.3 to 6.4.

• Honeypot and no-JS fields to help prevent spam (props @iamdharmesh, @dkotter, @jeffpaul, @qasumitbagthariya via #139).
• Confirmation prompt before logging out the user (props @iamdharmesh, @dkotter, @qasumitbagthariya via #149).
• A note advising users to set the website URL in the Mailchimp Audience settings (props @iamdharmesh, @MaxwellGarceau, @dkotter, @qasumitbagthariya via #145).

• Bump WordPress "tested up to" version 6.8 (props @qasumitbagthariya, @dkotter via #148).
• Bump WordPress minimum supported version from 6.3 to 6.4 (props @qasumitbagthariya, @dkotter via #148).

• Provide CSRF hardening for Mailchimp List changes (props @iamdharmesh, @joemcgill, @dkotter, @qasumitbagthariya).

• Enhance the Mailchimp List Subscribe Form block to allow for selecting an audience list, reorder fields, toggle field and group visibility, and various other improvements (props @iamdharmesh, @jeffpaul, @dkotter, @qasumitbagthariya via #126).
• Plugin settings page success and error messages will now use WP admin notices (props @MaxwellGarceau, @jeffpaul, @dkotter, @qasumitbagthariya, @iamdharmesh via #85).
• Renamed mailchimp_sf_global_msg function to mailchimp_sf_frontend_msg to differentiate functionality from WP admin notices that are used exclusively in the WP Admin (props @MaxwellGarceau, @jeffpaul, @dkotter, @qasumitbagthariya, @iamdharmesh via #85).
• Make the form field visibility dependent on the WordPress "Include?" settings instead of the Mailchimp settings (props @iamdharmesh, @jeffpaul, @dkotter, @qasumitbagthariya, @MaxwellGarceau via #137).

• Ensure that form data persists when validation fails (props @iamdharmesh, @jeffpaul, @dkotter, @qasumitbagthariya, @MaxwellGarceau via #130).
• Display an error message informing users that they must subscribe through the hosted form if they were previously unsubscribed (props @iamdharmesh, @dkotter, @qasumitbagthariya, @MaxwellGarceau via #131, #140).

• The "CSS Cheat Sheet" section from the Mailchimp settings page (props @iamdharmesh, @jeffpaul, @dkotter, @qasumitbagthariya via #126).
• The "Use JavaScript Support?" option from the Mailchimp settings page (props @iamdharmesh, @jeffpaul, @dkotter, @qasumitbagthariya via #126).
• The "Use JavaScript Datepicker?" option from the Mailchimp settings page (props @iamdharmesh, @jeffpaul, @dkotter, @qasumitbagthariya via #126).
• The "Custom Styling" settings from the Mailchimp settings page (props @iamdharmesh, @jeffpaul, @dkotter, @qasumitbagthariya via #126).
• The "Remove Mailchimp CSS" settings from the Mailchimp settings page (props @iamdharmesh, @jeffpaul, @dkotter, @qasumitbagthariya via #126).

• Bump express from 4.21.0 to 4.21.2 (props @dependabot, @iamdharmesh, @dkotter via #125).

• New tests to cover E2E critical flows (props @MaxwellGarceau, @jeffpaul, @dkotter, @iamdharmesh via #87, #99).
• Update existing tests to more robustly cover E2E critical flows. Modularized reusable testing code (props @MaxwellGarceau, @jeffpaul, @dkotter, @iamdharmesh via #87, #99).
• Update all third-party actions our workflows rely on to use versions based on specific commit hashes (props @dkotter, @jeffpaul, @iamdharmesh via #128).
• Prevent overwriting the release content with the body text provided in the GitHub Action workflow file (props @iamdharmesh, @dkotter via #129).

• Provide CSRF hardening for Mailchimp List changes (props @iamdharmesh, @joemcgill, @dkotter, @qasumitbagthariya).

• Transform the mailchimp_sf_shortcode shortcode to the Mailchimp List Subscribe Form block (props @MaxwellGarceau, @jeffpaul, @dkotter, @qasumitbagthariya via #84).

• Deprecated Sopresto code (props @MaxwellGarceau, @jeffpaul, @dkotter via #98).

• Fatal PHP error that would occur when the phone merge field was set to US format, but the merge field was not included in the Mailchimp plugin (props @MaxwellGarceau, @jeffpaul, @dkotter, @qasumitbagthariya via #108).
• Bug causing merge fields on the Mailchimp WP admin page to incorrectly display as not required when they were, in fact, required (props @MaxwellGarceau, @jeffpaul, @dkotter, @qasumitbagthariya via #109).
• Fix an issue that allows a user to select merge fields that were not selected as visible in the Mailchimp account (props @MaxwellGarceau, @jeffpaul, @dkotter, @qasumitbagthariya via #110).
• Bug causing all new subscribers to receive a double opt-in email (props Nathan Tetzlaff, @MaxwellGarceau, @jeffpaul, @dkotter, @qasumitbagthariya via #115).
• Bug causing contacts with any Mailchimp status (subscribed, unsubscribed, pending, etc.) to be able to submit the sign-up form even if "Update Existing Subscriber?" was disabled (props @MaxwellGarceau, @jeffpaul, @dkotter, @qasumitbagthariya via #115).
• Pending contacts will now still be required to confirm their original confirmation email if they try to update their contact while "Update Existing Subscribers?" and "Double Opt-in" are both enabled (props @MaxwellGarceau, @jeffpaul, @dkotter, @qasumitbagthariya via #115).

• Bump nanoid from 3.3.7 to 3.3.8 (props @dependabot, @iamdharmesh via #111).

• Add autoloading using composer (props @MaxwellGarceau, @jeffpaul, @dkotter, @qasumitbagthariya via #95).
• Updated GitHub Action step for generating the release assets (props @MaxwellGarceau, @jeffpaul, @dkotter via #97).

Note that this release bumps the WordPress minimum version from 6.1 to 6.3.

• Bump WordPress "tested up to" version 6.7 (props @qasumitbagthariya, @vikrampm1, @dkotter via #71).
• Bump WordPress minimum supported version from 6.1 to 6.3 (props @qasumitbagthariya, @vikrampm1, @dkotter via #71).

• Ensure the field name is properly added to the error message when the email address is blank (props @iamdharmesh, @jerclarke, @dkotter via #74).

• Remove the Advanced Section from our readme files (props @iamdharmesh, @dkotter via #77).

• Improved migration flow from API Key to OAuth authentication for a better user experience (props @iamdharmesh, @jeffpaul, @dkotter, @qasumitbagthariya via #67).
• Updated the menu SVG icon (props @dkotter, @jeffpaul via #65).

• Ensure that the settings remain persistent between logging out of the account and logging in again (props @iamdharmesh, @jeffpaul, @dkotter, @qasumitbagthariya via #66).

• Bump serve-static from 1.15.0 to 1.16.2 and express from 4.19.2 to 4.21.0 (props @dependabot, @dkotter via #55).
• Bump webpack from 5.91.0 to 5.94.0 (props @dependabot, @dkotter via #59).

Note this version increased the WordPress minimum version to 6.1 and the PHP minimum version to 7.0.

• Mailchimp List Subscribe Form custom block (props @nateconley, @dkotter, @jeffpaul via #35, #38).
• PHP 8.3 compatibility and minimum PHP version of 7.0 (props @nateconley, @jeffpaul, @dkotter via #26).
• WordPress 6.6 compatibility (props @nateconley, @dkotter, @jeffpaul via #27).
• OAuth authentication for connecting a Mailchimp account with WordPress (props @iamdharmesh, @dkotter, @jeffpaul via #47, #48, #50, #52).
• New user signup flow, allowing users to sign up for a Mailchimp account from within the plugin (props @iamdharmesh, @dkotter, @jeffpaul via #51).
• Created a LICENSE.md file and sets the license in the plugin to GPL-2.0-or-later (props @jeffpaul, @dkotter via #14).
• Plugin icon and banner assets (props @eddieshrake, @jeffpaul, @dkotter via #28).

• Bump WordPress "tested up to" version 6.6 (props @qasumitbagthariya, @vikrampm1, @jeffpaul via #43).
• Ensure the signup form is only visible when a list is selected in the settings (props @iamdharmesh, @dkotter, @qasumitbagthariya via #54).
• Moved settings page and link to top-level WP Admin menu item (props @nateconley, @dkotter, @jeffpaul via #29, #33).
• Admin styles to match updated Mailchimp brand guidelines (props @nateconley, @dkotter, @jeffpaul, @eddieshrake via #31).
• Replaced references of MailChimp to Mailchimp except where those references are explicitly functional code (to limit the additional class/function updates needed) (props @jeffpaul, @dkotter via #14).
• Updated readme.txt and mailchimp.php header values to the WP.org standards (props @jeffpaul, @dkotter via #14).
• Moved screenshots into a new .wordpress-org directory (props @jeffpaul, @dkotter via #14).
• Moved translations to GlotPress (props @nateconley, @dkotter, @jeffpaul via #39).

• Function mailchimpSF_signup_form deprecated in favor of mailchimp_sf_signup_form (props @nateconley, @dkotter via #24).
• jQuery scrollTo (props @nateconley, @dkotter, @jeffpaul via #27).

• Support for WordPress < 6.1.1 (props @nateconley, @dkotter, @jeffpaul via #27).
• Polyfills for WordPress < 2.8.0 (props @nateconley, @dkotter, @jeffpaul via #27).
• Monkey Rewards integration (props @nateconley, @dkotter, @jeffpaul via #30).
• IE-specific admin stylesheet (props @nateconley, @dkotter, @jeffpaul, @eddieshrake via #31).

• Formatting from linting checks (props @nateconley, @dkotter via #23).
• Datepicker display on frontend (props @nateconley, @dkotter, @jeffpaul via #25).
• Accessibility for admin settings page (props @nateconley, @dkotter, @jeffpaul, @eddieshrake via #31).
• Properly handle the scenario where a non-valid list is updated (props @dkotter, @qasumitbagthariya, @nateconley, @vikrampm1 via #40).
• Ensure the custom block and shortcode both have consistent spacing (props @dkotter, @qasumitbagthariya, @nateconley, @vikrampm1 via #41).
• Address some PHP warnings when a form submission happens (props @iamdharmesh, @dkotter, @qasumitbagthariya via #54).

• Created a README.md file from the readme.txt content (props @jeffpaul, @dkotter via #14, #22).
• Created CODE_OF_CONDUCT.md, CONTRIBUTING.md, SECURITY.md, Issue and PR templates, Dependabot config file, and composer.json and package.json base files (props @jeffpaul, @dkotter via #15).
• Added WordPress Version Checker and Build Release Zip GitHub Action Workflows (props @dkotter, @jeffpaul via #16).
• Added Cypress E2E framework, associated GitHub Action Workflow, and E2E tests (props @dkotter, @jeffpaul, @iamdharmesh via #17, #48).
• Added PHP Compatibility GitHub Action Workflow (props @dkotter, @jeffpaul via #18).
• Added PHPCS Linting GitHub Action Workflow (props @dkotter, @jeffpaul via #19).
• Added ESLint GitHub Action Workflow (props @dkotter, @jeffpaul via #20).
• Added Standard GitHub Action Workflows (props @dkotter, @jeffpaul via #21).

• Provide CSRF hardening for Mailchimp List changes.

• Updated readme.txt link.

• PHP warning for merge tags.
• Double slashes on resources being loaded.

• Fix undefined variable notice.
• Fix HTML submission message.

• Fixes short array notation which caused a fatal error in older PHP versions.

• Fix timeout error on activation.

• Set optional value for API wrapper.

• Fix PHP7 compatibility issue
• Cut down on size of API requests for users with large lists.
• Fix CSS issue on removing Mailchimp style.

• General bugfixes for merge fields.
• When re-initializing, update merge field values.

• Bugfix for fatal error in Mailchimp lib.

• Upgrade to Mailchimp API v3.0
• Remove OAuth2 middle layer and use Mailchimp API keys.
• Include double/single opt-in toggle.

• Updated for WordPress 4.0 postback compatibility.

• Update styles to be compatible with upcoming 3.8 wp-admin changes.

• Developer Mode "Kitchen Sink" takes over plugin for local development.
• Developer Mode has filters of changeable content.
• Fix bug related to required US phone validation.

• Now using OAuth flow for user authentication.
• Admin UI refresh.

• Add link to edit profile within error when duplicate signup occurs.

• Fixed bug preventing address fields from submitting correctly.

• Update spanish language files (es_ES and es_MX).

• Updating translation strings.

• Invalid group fix.

• Fixed bug where multiple checkbox type interest groups were returning an invalid error.
• Fixed bug where assets were not enqueueing properly if the plugin directory was not set to 'mailchimp'. Now supports any directory name.

• Fixed bug where entire phone numbers were only being deposited in the area code portion.

• CSS should now always load correctly on the front end.
• Adding Hebrew and Romanian language support.
• Updating translation contribution instructions.
• Tested version is now 3.3.1.

• Fixed bug with "Settings" link appearing on all plugins (props Jason Lane).
• Resolved issue with unnecessary calls to the Mailchimp API during upgrade check.
• Resolved PHP warning when there weren't any interest groups.

• Field formatting based on type
• Support for multiple interest groups (a data upgrade procedure must be run by visiting the WordPress dashboard).
• Added jQuery datepicker option to be used with dates.
• Added a handful of new translations.
• Fixing various PHP notices and deprecated functions (props Jeffry Ghazally).

• Version bump for proper listing on wordpress.org.

• Change mailchimp_sf_where_am_i() to use plugins_url() in place of WP_PLUGIN_URL to take SSL into account when delivering assets (props John LeBlanc).
• Update MCAPI wrapper to bring back PHP4 support (note: PHP 5.2 to be required starting with WordPress 3.2).

• Change MCAPI wrapper to use a more unique class name, v1.3 of the API, and a much lighter client library.

• Fixed internationalization path bug.
• Fixed instances where i18n functions weren't necessary in admin.
• Added more strings to be translated.

• Recommended Upgrade, please see "Upgrading" section of readme.
• Security and various other improvements