diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6bb3ccf..e7a75ab 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- docs: Add AGENTS.md with complete agent rules and workflow
+  - Agent staff configuration with 7 specialized roles
+  - Operational workflow (Spec-Driven, TDD, Sacchi Method)
+  - Git workflow conventions (Conventional Commits, Atomic Commits)
+  - Configuration structure for .opencode/agents/ and .opencode/skills/
+
 ## [0.1.0] - 2026-04-02
 
 ### Added