diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..3530eab
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,34 @@
+# Changelog
+
+All notable changes to **adn-server** are documented here. Versioning follows [SemVer](https://semver.org/).
+
+## [1.0.0] - 2026-06-06
+
+First stable public release. 
+
+### Added
+
+- Clean-architecture rewrite: domain, application, infrastructure layers.
+- YAML configuration (`adn-server.yaml`) with startup validation.
+- HBP MASTER/PEER and OpenBridge forwarding with legacy parity (loops, BCSQ, packet control).
+- Talker Alias: DMRA packets and embedded LC overlay (UTF-8 / ISO-8859-1 / 7-bit formats).
+- Voice: announcements, TTS pipeline, on-demand AMBE playback, recording.
+- Parrot entrypoint (`adn-parrot.py`) for TG 9990 echo/playback.
+- Monitor report TCP: HELLO JSON (mode v2), CONFIG_SND / BRIDGE_SND (pickle), BRDG_EVENT.
+- Hot reload: `adn-server.yaml` (SIGHUP), `adn-voice.yaml` (15 s loop), log reopen (SIGUSR2).
+- MkDocs user guide (EN/ES).
+
+### Fixed (highlights since parity baseline)
+
+- OpenBridge packet control and ingress timing.
+- Parrot playback sequence preservation on long QSOs.
+- Config validator accepts numeric MMDVM option fields in YAML.
+- OBP END/TX reporting and STATUS lifecycle alignment with legacy.
+
+### Compatibility
+
+- **Monitor:** adn-monitor **1.0.0** (HELLO v2 + legacy pickle report).
+- **Config:** use `adn-server.example.yaml` as template; production YAML is not committed.
+- **Wire:** HBP and OpenBridge on-wire formats unchanged vs legacy ADN DMR Server.
+
+[1.0.0]: https://github.com/ce5rpy/ADN-DMR-Peer-Server/releases/tag/v1.0.0
diff --git a/README.md b/README.md
index e8b443e..c008dfa 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # ADN DMR Peer Server
 
+**Version 1.0.0** — first stable release (SemVer). Compatible with **adn-monitor 1.0.0**.
+
 ADN DMR conference bridge server. Configuration is YAML; the codebase follows clean architecture (domain, application, infrastructure).
 
 ## License
diff --git a/pyproject.toml b/pyproject.toml
index c437104..b0236b5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "adn-server"
-version = "0.1.0"
+version = "1.0.0"
 description = "ADN DMR Peer Server"
 readme = "README.md"
 license = { text = "GPL-3.0-or-later" }
diff --git a/src/adn_server/__init__.py b/src/adn_server/__init__.py
index c5f7dbe..1d8b677 100644
--- a/src/adn_server/__init__.py
+++ b/src/adn_server/__init__.py
@@ -36,3 +36,5 @@
 ###############################################################################
 
 """ADN DMR Peer Server — conference bridge (rewrite of bridge_master)."""
+
+__version__ = "1.0.0"
diff --git a/src/adn_server/main.py b/src/adn_server/main.py
index 37951c2..67703f2 100644
--- a/src/adn_server/main.py
+++ b/src/adn_server/main.py
@@ -159,9 +159,12 @@ def _looping_errback(logger: logging.Logger, failure):
 
 
 def main() -> None:
+    from . import __version__
+
     parser = argparse.ArgumentParser(description="ADN DMR Peer Server")
     parser.add_argument("-c", "--config", dest="CONFIG_FILE", default=None, help="Path to adn-server.yaml")
     parser.add_argument("--logging", dest="LOG_LEVEL", default=None, help="Override log level")
+    parser.add_argument("--version", action="version", version=f"adn-server {__version__}")
     args = parser.parse_args()
 
     project_root = os.path.dirname(os.path.abspath(__file__))