chore(release): bump version to 0.28.0

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: yoanbernabeu

CHANGELOG.md

@@ -7,6 +7,18 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.28.0] - 2026-02-07
+
+### Added
+
+- **Ollama/LM Studio Endpoint Prompt**: `grepai init` now prompts for custom Ollama/LM Studio endpoint URL during initialization (#111) - @yoanbernabeu
+- **Content-Addressed Embedding Deduplication**: Skip re-embedding unchanged chunks using content hashing, reducing indexing time and API calls (#112) - @tinker495
+- **Nix Release Automation**: Automate `flake.nix` version and vendorHash update in the release GitHub Actions workflow (#117) - @yoanbernabeu
+
+### Fixed
+
+- **UTF-8 Chunk Boundaries**: Align chunk boundaries to valid UTF-8 rune starts to prevent splitting multi-byte characters (#116) - @yoanbernabeu
+
 ## [0.27.0] - 2026-02-04
 
 ### Added
@@ -496,7 +508,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Initial public release
 
-[Unreleased]: https://github.com/yoanbernabeu/grepai/compare/v0.27.0...HEAD
+[Unreleased]: https://github.com/yoanbernabeu/grepai/compare/v0.28.0...HEAD
+[0.28.0]: https://github.com/yoanbernabeu/grepai/compare/v0.27.0...v0.28.0
 [0.27.0]: https://github.com/yoanbernabeu/grepai/compare/v0.26.0...v0.27.0
 [0.26.0]: https://github.com/yoanbernabeu/grepai/compare/v0.25.2...v0.26.0
 [0.25.2]: https://github.com/yoanbernabeu/grepai/compare/v0.25.1...v0.25.2

docs/src/components/homepage/HeroAnimated.astro

@@ -3,7 +3,7 @@ interface Props {
   version?: string;
 }
 
-const { version = "0.27.0" } = Astro.props;
+const { version = "0.28.0" } = Astro.props;
 
 // Fetch GitHub stats at build time for SSR fallback
 let stars = 750;

flake.nix

@@ -10,7 +10,7 @@
       supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
       forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
 
-      version = "0.27.0";
+      version = "0.28.0";
 
       mkGrepai = pkgs: pkgs.buildGoModule {
         pname = "grepai";