- Renamed `master` branch references to `main`.
- Added workflow permissions and concurrency settings.
- Updated `actions/checkout` to `v6` and `ruby/setup-ruby` to `v1` with Ruby version `3.4`.
- Adjusted installation of the `code-scanning-rubocop` gem.
- Bumped `github/codeql-action/upload-sarif` to `v4`.

- Renamed branch references from `master` to `main` for consistency.
- Enabled workflow permissions and added concurrency settings.
- Updated job matrix to include Rails 7.2, 8.0, 8.1 and Ruby 3.4, 4.0.
- Excluded unsupported Rails versions for Ruby 4.0 in the matrix.
- Upgraded `actions/checkout` to `v6`.
- Removed commented-out seed generator workflow.
- Simplified RSpec command by removing unused seed reference.

- Added `bin/release` to automate gem version building and publishing.
- Introduced `bin/rspec` for running tests via RSpec.
- Added `bin/rubocop` for linting using RuboCop with explicit configuration.
- Scripts improve developer productivity and ensure consistency across tasks.

- Introduced `rails_8.0.gemfile` and `rails_8.1.gemfile` for Rails 8.0 and 8.1.
- Updated `Appraisals` file to include new Rails versions.
- Ensures compatibility testing for `activesupport` 8.0 and 8.1.

- Cleaned up an unnecessary blank line in the `Appraisals` file.
- Maintains consistency and tidiness within the configuration file.

- Changed `add_runtime_dependency` to `add_dependency` in `fretboard.gemspec` for `activesupport`, `colorize`, and `terminal-table`.
- Eliminates redundancy as `add_dependency` implicitly includes runtime scope.
- Enhances maintainability and consistency in the dependency definitions.

- Updated all instances of `include_examples` to `it_behaves_like` across `fretboard/builder_spec.rb`.
- Improves consistency in test style and adheres to RSpec conventions.
- Does not alter test functionality, keeping behavior intact.

- Introduced `rails_7.2.gemfile` for Rails 7.2 compatibility testing.
- Updated `Appraisals` file to include a new `rails-7.2` appraisal block.
- Ensures support and compatibility for `activesupport` version `~> 7.2.0`.

- Created a `Base` exception class under `Fretboard::Exceptions` as the root class for custom exceptions.
- Added `NotBuilt` exception for handling unbuilt guitar fretboard errors with a default message.
- Added `UnknownNote` exception to represent invalid or unidentified musical notes.
- Added `UnknownTuning` exception for unrecognized guitar tuning errors with dynamic error messages.
- Supports improved error handling and context-specific messaging for the Fretboard module.

- Introduced `Fretboard::NoteFormatter` for formatting musical notes.
- Added support for formatting notes as strings or arrays, with options for sharp, flat, or both notations.
- Implemented comprehensive test coverage in `note_formatter_spec.rb` to validate behavior across scenarios.
- Enhances functionality by providing flexible note formatting for the Fretboard module.

- Added custom exception classes from the `Fretboard::Exceptions` namespace to the spec helper.
- Included `Fretboard::NoteFormatter` in the spec helper for test accessibility.
- Enhances test environment by preloading necessary modules and dependencies.

- Eliminated unnecessary checks for `Gemfile` existence in the root directory.
- Removed `rubygems` and `bundler` setup, simplifying the script's initialization.
- Kept only the essential `Fretboard::Parser` invocation for argument parsing.
- Enhances maintainability by streamlining the script and removing obsolete logic.

- Added `Fretboard::Exceptions::Base`, `UnknownTuning`, `UnknownNote`, and `NotBuilt` to improve error handling for specific scenarios.
- Included `Fretboard::NoteFormatter` for note formatting utilities.
- Streamlines module loading and improves the modular structure of the Fretboard library.

- Enhanced `Parser#parse` method with specific error handling for `Fretboard::Exceptions::Base` and `OptionParser::ParseError`.
- Refined generic error messages to provide clearer context for unexpected errors.
- Updated version output to use `Fretboard::VERSION::STRING` for consistency.
- Improved user feedback and error messaging robustness.

- Utilized `Fretboard::Tunings.list` to dynamically define tuning methods in `Fretboard::Builder`, reducing redundancy.
- Replaced manual note formatting logic with `Fretboard::NoteFormatter` for consistent formatting.
- Raised specific exceptions (`UnknownTuning`, `NotBuilt`, `UnknownNote`) for improved error handling and feedback.
- Refactored `Fretboard::Notes.all` and `Fretboard::Note.next_for` to streamline formatting logic.
- Removed obsolete comments and redundant methods, simplifying overall code structure.

- Consolidated `require` statements in the main `fretboard` entry point, leveraging Zeitwerk for autoloading modules.
- Removed individual `require` statements from various files, reducing redundancy and improving modularity.
- Added `zeitwerk` as a dependency in the gemspec to enable autoloading.
- Updated bin and spec helper files to adjust to the new autoloading structure.
- Simplified the Gemfile and Gemfile.lock for consistency with added dependencies.

- Moved `optparse` requirement from `Parser` to the main `Fretboard` entry point for consistency with other dependencies.
- Simplifies module organization by consolidating dependency management in the main `fretboard.rb` file.

- Removed all Rails-specific gemfiles and related appraisal configurations.
- Deleted the `Appraisals` file and `appraisal` gem dependency from development.
- Updated the `fretboard.gemspec` to require Ruby 3.0 or higher.
- Simplified CI workflow to exclude Rails gemfile matrix testing.
- Replaced usages of `active_support` methods with standard Ruby alternatives.
- Streamlined the codebase by removing redundant dependencies and configurations.

- Adjusted note assignments within the `OPEN_A` tuning configuration, reordering string mappings for accuracy.
- Updated corresponding specs in `builder_spec.rb` to reflect the revised tuning and ensure consistent test coverage.
- Simplified handling of notes with enharmonic equivalents, improving clarity and correctness.

- Added tests for `.list`, ensuring proper structure, immutability, and all tunings having required keys and values.
- Verified `.fetch` behavior for both valid and invalid tunings, covering multiple input formats (symbols and strings).
- Included tests for `.exists?` to confirm presence checks for tunings in various cases.
- Added `.draw_list` specs to validate its interaction with `Fretboard::Console`, including output structure and formatting.
- Ensured `TUNINGS` constant is private and raises appropriate errors.

- Adjusted `have_received` expectations in `builder_spec.rb` and `tunings_spec.rb` for clearer structure and alignment.
- Reformatted chained method calls across multiple specs to improve code readability.
- Made no functional changes, ensuring test behavior and coverage remain consistent.

- Included platform entries for `aarch64-linux-gnu`, `aarch64-linux-musl`, `arm-linux-gnu`, `arm-linux-musl`, `x86_64-darwin`, `x86_64-linux-gnu`, and `x86_64-linux-musl`.
- Ensured Gemfile.lock reflects broader compatibility across architectures.

- Updated `fretboard.gemspec` to require Ruby version 3.1 or higher.
- Modified GitHub Actions workflow to remove Ruby 3.0 from the CI matrix, keeping 3.1 and newer.

- Updated `fretboard.gemspec` to require Ruby version 3.2 or higher.
- Modified GitHub Actions workflow to remove Ruby 3.1 from the CI matrix, ensuring compatibility with 3.2 and newer.

- Introduced a `CODE_OF_CONDUCT.md` file using the Contributor Covenant v2.1.
- Defined community standards for respectful and inclusive interactions.
- Described enforcement responsibilities, scope, and guidelines for handling violations.
- Included attribution and links to official resources for further reference.

- Added a `CONTRIBUTING.md` file with guidelines for contributions.
- Included steps for forking, cloning, creating branches, and making a pull request.
- Provided instructions for writing clean code, adding tests, and updating documentation.
- Linked helpful resources, such as GitHub signup and forking documentation.
- Encouraged questions through the issue tracker on the main repository.

- Updated the README structure with a visually appealing center-aligned layout.
- Added badges for Ruby version, downloads, and existing Gem and release info.
- Expanded the feature list under "Why Fretboard?" with key highlights.
- Refined sections for Ruby API and CLI tool for better readability.
- Included a comprehensive list of supported guitar tunings in table format.
- Improved fretboard diagram formatting and added missing tuning entries.
- Added new sections for contributing guidelines, acknowledgments, and license details.

- Updated method calls across multiple classes (`NoteFormatter`, `Builder`, `Console`, `Notes`) to use Ruby's shorthand keyword argument syntax.
- Ensured consistent application of modern Ruby conventions throughout the codebase.
- Improved code readability and maintainability by reducing verbosity.