diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..e41cdac
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,44 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [0.1.0] - 2026-04-01
+
+### Added
+
+- Core reverse proxy functionality with streaming response support (SSE-friendly)
+- Embeddable library mode for use in Rust applications
+- CLI mode for standalone execution
+- Caddy-like configuration syntax parsing
+- Path-based routing with wildcard support (`/api/*`)
+- Header manipulation directives (`header`)
+- URI rewriting (`uri_replace`)
+- HTTP and HTTPS backend support via `hyper-tls`
+- Method-based routing (`method GET POST { ... }`)
+- Direct responses (`respond 200 "OK"`)
+- Authentication module:
+  - Header value substitution (`{header.Name}`, `{env.VAR}`, `{uuid}`)
+  - Remote IP extraction from `X-Forwarded-For` / `X-Real-IP`
+  - External token validation helper
+- Management REST API:
+  - `GET /config` - view current configuration
+  - `POST /config` - update configuration
+  - `GET /health` - health check endpoint
+- Connection pooling with configurable limits
+- Automatic concurrency limiting (default: CPU cores × 256)
+- Graceful shutdown via SIGTERM/SIGINT
+- Feature flags for modular builds:
+  - `cli` - CLI dependencies and binary
+  - `tls` - HTTPS backend support
+  - `api` - Management API
+- GitHub Actions CI/CD:
+  - Automated testing and linting
+  - Multi-platform release builds (Linux, macOS, Windows)
+  - Automatic crates.io publishing
+  - GitHub Release creation
+- Example programs for library usage
+
+[0.1.0]: https://github.com/denislituev/tiny-proxy/releases/tag/v0.1.0
\ No newline at end of file
diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ Lightweight, embeddable HTTP reverse proxy written in Rust with Caddy-like confi
 - **HTTP/HTTPS Backend Support**: Full support for both HTTP and HTTPS backends
 - **Method-based Routing**: Different behavior for different HTTP methods
 - **Direct Responses**: Respond with custom status codes and bodies
-- **Authentication Module**: Token validation and header substitution (optional feature)
+- **Authentication Module**: Token validation and header substitution
 - **Management API**: REST API for runtime configuration management (optional feature)
 
 ## Installation