docs(CHANGELOG): make changelog keepachangelog compliant

.github/pull_request_template.md

@@ -24,6 +24,7 @@ If applicable, include links to any relevant documentation, articles, or resourc
 - [ ] Documentation update (changes to documentation only)
 - [ ] Refactor / code style update (non-breaking change that improves code structure or readability)
 - [ ] Tests / CI improvement (adding or updating tests or CI configuration only)
+- [ ] Chore / maintenance (non-breaking change that does not affect functionality, such as updating dependencies or fixing typos)
 - [ ] Other (please describe):
 
 ## Checklist
@@ -32,3 +33,4 @@ If applicable, include links to any relevant documentation, articles, or resourc
 - [ ] Updated any relevant documentation.
 - [ ] Added comments to your code where necessary.
 - [ ] Formatted your code, run the linters, checked types and tests.
+- [ ] Added your changes to the [CHANGELOG](./CHANGELOG.md) file, if applicable.

CHANGELOG.md

@@ -1,9 +1,54 @@
-# language_tool_python Changelog
+# Changelog
 
-## 3.4.0 (2026-05-15)
-- Corrected a bug in `language_tool_python.server.LanguageTool.check` where the LT `/check` endpoint was queried with GET instead of POST.
-- Corrected a bug in `language_tool_python.config_file.LanguageToolConfig` where config keys and values could contain line breaks or end with an odd number of backslashes.
-- Corrected the default LT download version (from `latest` snapshot to release `6.8`).
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/2.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+### Added
+- Added `premium_key` property to `language_tool_python.server.LanguageTool` to attach a premium API key for LanguageTool API requests.
+- Added `premium_username` property to `language_tool_python.server.LanguageTool` to attach a username for premium LanguageTool API requests.
+- Added `language_tool_python.match.is_check_match` type guard function to verify that a value is a `CheckMatch` (type from `language_tool_python._internals`).
+- Added `language_tool_python.config_file.ConfigValue` public type alias representing all accepted value types for `LanguageToolConfig`.
+
+### Changed
+- **Breaking:** Dropped Python 3.9 support, now supports Python 3.10-3.15.
+- **Breaking:** Moved internal utilities to a private `_internals` subpackage:
+    - `language_tool_python.safe_zip` -> `language_tool_python._internals.safe_zip`
+    - `language_tool_python.utils.parse_url` -> `language_tool_python._internals.utils.parse_url`
+    - `language_tool_python.utils.get_env_int` -> `language_tool_python._internals.utils.get_env_int`
+    - `language_tool_python.utils.get_env_float` -> `language_tool_python._internals.utils.get_env_float`
+    - `language_tool_python.utils.get_language_tool_download_path` -> `language_tool_python._internals.utils.get_language_tool_download_path`
+    - `language_tool_python.utils.get_locale_language` -> `language_tool_python._internals.utils.get_locale_language`
+    - `language_tool_python.utils.kill_process_force` -> `language_tool_python._internals.utils.kill_process_force`
+- Removed `packaging` as a runtime dependency.
+- **Breaking:** Narrowed the type of the `config` parameter of `language_tool_python.config_file.LanguageToolConfig.__init__` from `dict[str, Any]` to `Mapping[str, ConfigValue]`.
+- **Breaking:** Changed return type of `language_tool_python.download_lt.LocalLanguageTool.version_into` and `language_tool_python.download_lt.ReleaseLocalLanguageTool.version_into` from `packaging.version.Version` to `tuple[int, int]`.
+- Replaced `toml` dependency with `tomli` for Python < 3.11 (fallback for the stdlib `tomllib`).
+- Added `typing_extensions` as a dependency for Python < 3.13 (fallback for the stdlib `warnings.deprecated`).
+
+### Fixed
+- Corrected a bug in `language_tool_python.config_file.LanguageToolConfig` where directory paths were incorrectly rejected by the path validator.
+
+### Removed
+- **Breaking:** Removed all functions and classes previously deprecated in v3.3.0:
+    - `language_tool_python.download_lt.get_common_prefix`
+    - `language_tool_python.download_lt.http_get`
+    - `language_tool_python.download_lt.unzip_file`
+    - `language_tool_python.download_lt.download_zip`
+    - `language_tool_python.download_lt.download_lt`
+    - `language_tool_python.utils.find_existing_language_tool_downloads`
+    - `language_tool_python.utils.get_language_tool_directory`
+    - `language_tool_python.utils.get_server_cmd`
+    - `language_tool_python.utils.get_jar_info`
+    - `language_tool_python.match.auto_type`
+
+## [3.4.0] - 2026-05-15
+
+> Security hardening for LT downloads: SHA-256 integrity verification, safe ZIP extraction, configurable size limits, and support for LT releases 6.7+.
+
+### Added
 - Added SHA-256 verification for downloaded LT zip files.
 - Added a bundled `language_tool_python/integrity.toml` manifest containing SHA-256 checksums for LT release/archive downloads.
 - Added new env variables for LT download verification:
@@ -12,7 +57,6 @@
     - `LTP_BYPASS_VERIFIED_DOWNLOADS`
 - Added a maximum download size limit for LT zip files, configurable with `LTP_MAX_DOWNLOAD_BYTES`.
 - Added `language_tool_python.safe_zip.SafeZipExtractor` and `language_tool_python.safe_zip.SafeZipLimits` to extract ZIP files safely.
-- Edited LT ZIP extraction to reject unsafe paths, symlinks, unsupported member types, duplicate paths, file/directory conflicts, oversized archives/members, suspicious compression ratios and overwrites of existing paths.
 - Added new env variables for safe ZIP extraction limits:
     - `LTP_SAFE_ZIP_MAX_ARCHIVE_BYTES`
     - `LTP_SAFE_ZIP_MAX_EXTRACTED_BYTES`
@@ -24,81 +68,124 @@
 - Added `LTP_DOWNLOAD_HOST_NEW_RELEASES` to override the new LT release download host.
 - Added `language_tool_python.utils.get_env_int` and `language_tool_python.utils.get_env_float`.
 
-## 3.3.1 (2026-05-10)
+### Changed
+- Edited the default LT download version (from `latest` snapshot to release `6.8`).
+- Edited LT ZIP extraction to reject unsafe paths, symlinks, unsupported member types, duplicate paths, file/directory conflicts, oversized archives/members, suspicious compression ratios and overwrites of existing paths.
+
+### Fixed
+- Corrected a bug in `language_tool_python.server.LanguageTool.check` where the LT `/check` endpoint was queried with GET instead of POST.
+- Corrected a bug in `language_tool_python.config_file.LanguageToolConfig` where config keys and values could contain line breaks or end with an odd number of backslashes.
+
+## [3.3.1] - 2026-05-10
+
+### Changed
 - Edited the LanguageTool snapshot current version (from 6.8-SNAPSHOT to 6.9-SNAPSHOT) to allow users to retrieve automatically the latest snapshot version of LT.
 
-## 3.3.0 (2026-03-07)
-- Corrected a bug in `language_tool_python.server.LanguageTool._get_valid_spelling_file_path` where the spelling file was always the one for English, even when the LT instance was configured for a different language.
-- Corrected a bug in `language_tool_python.server.LanguageTool` where, even if you specified a `language_tool_download_version`, the used LT version was always the latest one present on the system (the download was working correctly, but the downloaded version was not used).
-- Corrected the necessary java version for old LT releases (from 1.8 to 1.9).
+## [3.3.0] - 2026-03-07
+
+### Added
 - Added an abstract class `LocalLanguageTool` that expose an common interface for subclasses who implements some type of LT download.
 - Added `ReleaseLocalLanguageTool` class (implementation of `LocalLanguageTool`) that implements the downloading of LT from release/archive page.
 - Added `SnapshotLocalLanguageTool` class (implementation of `LocalLanguagetool`) that implements the downloading of LT from snapshot page.
+
+### Changed
 - Edited the low limit of the supported LT version (now at release 4.0).
+
+### Deprecated
 - Deprecated some funcs (they remain available until version 4.0.0):
     - `language_tool_python.download_lt.get_common_prefix`
     - `language_tool_python.download_lt.http_get`
     - `language_tool_python.download_lt.unzip_file`
     - `language_tool_python.download_lt.download_zip`
     - `language_tool_python.download_lt.download_lt`
     - `language_tool_python.utils.find_existing_language_tool_downloads`
-    - `language_tool_python.utils._extract_version`
     - `language_tool_python.utils.get_language_tool_directory`
     - `language_tool_python.utils.get_server_cmd`
     - `language_tool_python.utils.get_jar_info`
 
-## 3.2.2 (2026-01-02)
+### Fixed
+- Corrected a bug in `language_tool_python.server.LanguageTool._get_valid_spelling_file_path` where the spelling file was always the one for English, even when the LT instance was configured for a different language.
+- Corrected a bug in `language_tool_python.server.LanguageTool` where, even if you specified a `language_tool_download_version`, the used LT version was always the latest one present on the system (the download was working correctly, but the downloaded version was not used).
+- Corrected the necessary java version for old LT releases (from 1.8 to 1.9).
+
+## [3.2.2] - 2026-01-02
+
+### Fixed
 - Corrected a bug in `language_tool_python.download_lt.http_get` by adding proper handling of HTTP 403 and other non 200 status codes by raising `language_tool_python.exceptions.PathError`. Previously, in case of such status codes, the function would download an HTML error page instead of the expected zip file, leading to an error when attempting to unzip it.
 
-## 3.2.1 (2025-12-30)
+## [3.2.1] - 2025-12-30
+
+### Fixed
 - Corrected a bug in `language_tool_python.server._kill_processes` where processes were not being properly waited for after being killed, potentially leading to zombie processes.
 
-## 3.2.0 (2025-12-18)
+## [3.2.0] - 2025-12-18
+
+### Added
 - Added a `check_matching_regions` method in `language_tool_python.server.LanguageTool`.
 
-## 3.1.0 (2025-11-23)
+## [3.1.0] - 2025-11-23
+
+### Added
 - Added an optional parameter to `LanguageTool` (`proxies`).
 - Added an `proxies` attribute to `LanguageTool` (This attribute is used by the `LanguageTool._query_server` method).
 - Added new read-only properties to `LanguageTool`:
     - `url`
     - `is_remote`
     - `host`
     - `port`
+
+### Changed
 - Edited the documentation of the `LanguageTool` class to improve clarity.
 
-## 3.0.0 (2025-11-20)
+## [3.0.0] - 2025-11-20
 
-### What's New:
-- Corrected a bug when the default locale is POSIX default (C).
-- Corrected a bug when closing `LanguageTool` instances (deadlocks).
-- Corrected a bug when comparing LT versions (e.g., '5.8' vs '5.10').
+> Major rewrite: snake_case naming conventions, strict Python types, dedicated `exceptions` module, logging, and online documentation.
+
+### Added
 - Added new possible values in LT config (`trustXForwardForHeader`, `suggestionsEnabled` and lang keys).
 - Added a warning if you forget to explicitly close a `LanguageTool` instance.
 - Added online documentation for the package.
 - Added logging (and logs) in the package.
 - Added raising `exceptions.TimeoutError` in `download_lt.http_get`.
 - Added `packaging` as a dependency.
-- Moved exception classes to a separate `exceptions` module (no more importable from `utils`).
-- Edited raised exceptions in some methods/functions:
+
+### Changed
+- **Breaking:** Moved exception classes to a separate `exceptions` module (no more importable from `utils`).
+- **Breaking:** Edited raised exceptions in some methods/functions:
     - from `AssertionError` to `ValueError` in `config_file.LanguageToolConfig.__init__`
     - from `AssertionError` to `exceptions.PathError` in `download_lt.download_lt`
     - from `AssertionError` to `ValueError` in `download_lt.download_lt`
     - from `AssertionError` to `ValueError` in `server.LanguageTool.__init__`
     - from `AssertionError` to `ValueError` in `utils.kill_process_force`
-- Edited some camelCase attributes/methods to snake_case:
+- **Breaking:** Edited some camelCase attributes/methods to snake_case:
     - `server.LanguageTool.motherTongue` to `server.LanguageTool.mother_tongue`
     - `server.LanguageTool.newSpellings` to `server.LanguageTool.new_spellings`
     - `match.Match.ruleId` to `match.Match.rule_id`
     - `match.Match.offsetInContext` to `match.Match.offset_in_context`
     - `match.Match.errorLength` to `match.Match.error_length`
     - `match.Match.ruleIssueType` to `match.Match.rule_issue_type`
     - `match.Match.matchedText` to `match.Match.matched_text`
-- Edited types of some params:
+- **Breaking:** Edited types of some params:
     - `directory_to_extract_to` in `dowload_lt.unzip_file` from `str` to `Path`
     - `directory` in `download_lt.download_zip` from `str` to `Path`
     - `download_folder` in `utils.find_existing_language_tool_downloads` from `str` to `Path`
-- Edited return types of some methods/functions:
+- **Breaking:** Edited return types of some methods/functions:
     - from `str` to `Path` in `utils.get_language_tool_download_path`
     - from `list[str]` to `list[Path]` in `utils.find_existing_language_tool_downloads`
     - from `str` to `Path` in `utils.get_language_tool_directory`
     - from `tuple[str, str]` to `tuple[Path, Path]` in `utils.get_jar_info`
+
+### Fixed
+- Corrected a bug when the default locale is POSIX default (C).
+- Corrected a bug when closing `LanguageTool` instances (deadlocks).
+- Corrected a bug when comparing LT versions (e.g., '5.8' vs '5.10').
+
+[Unreleased]: https://github.com/jxmorris12/language_tool_python/compare/3.4.0...HEAD
+[3.4.0]: https://github.com/jxmorris12/language_tool_python/compare/3.3.1...3.4.0
+[3.3.1]: https://github.com/jxmorris12/language_tool_python/compare/3.3.0...3.3.1
+[3.3.0]: https://github.com/jxmorris12/language_tool_python/compare/3.2.2...3.3.0
+[3.2.2]: https://github.com/jxmorris12/language_tool_python/compare/3.2.1...3.2.2
+[3.2.1]: https://github.com/jxmorris12/language_tool_python/compare/3.2.0...3.2.1
+[3.2.0]: https://github.com/jxmorris12/language_tool_python/compare/3.1.0...3.2.0
+[3.1.0]: https://github.com/jxmorris12/language_tool_python/compare/3.0.0...3.1.0
+[3.0.0]: https://github.com/jxmorris12/language_tool_python/compare/2.9.5...3.0.0

CONTRIBUTING.md

@@ -16,7 +16,7 @@ The best contributions are those that try to resolve the [issues](https://github
 
 ### 2. Fork the repository and make your changes
 
-If you want to contribute, you first need to fork the repo (and preferably create a branch with a name that says something about the changes you're going to make).
+If you want to contribute, you first need to fork the repo and create a branch with a name that says something about the changes you're going to make (e.g., `fix/issue-123`, `feature/new-function`).
 
 To start developing, you can install all the necessary packages in your python environment with this command (optional dependencies will be installed):
 ```shell
@@ -47,9 +47,10 @@ Please do not manually bump the version number in [pyproject.toml](./pyproject.t
 Before pushing and creating your pull request, you should make sure you've done the following:
 
 - Updated any relevant tests.
-- Updated any relevant documentation. This includes docstrings and [README](./README.md) file.
+- Updated any relevant documentation. This includes docstrings, [README](./README.md) file, and [sphinx documentation](./docs/source/references).
 - Added comments to your code where necessary (especially if the code is not self-explanatory).
 - Formatted your code, run the linters and tests.
+- Added your changes to the [CHANGELOG](./CHANGELOG.md) file, if applicable. You have to follow the [Keep a Changelog](https://keepachangelog.com/en/2.0.0/) format for this, and make sure to add your changes under the "Unreleased" section.
 
 ### 4. Create your pull request
 

README.md

@@ -94,7 +94,7 @@ For the full API reference, configuration options, CLI usage, and more examples,
 
 ## Versioning
 
-This project follows [Semantic Versioning](https://semver.org/) (`MAJOR.MINOR.PATCH`):
+This project follows [Semantic Versioning](https://semver.org/spec/v2.0.0.html) (`MAJOR.MINOR.PATCH`):
 
 - **PATCH** - backwards-compatible bug fixes.
 - **MINOR** - new backwards-compatible features.