diff --git a/CHANGELOG.md b/CHANGELOG.md
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--- a/CHANGELOG.md
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@@ -1,3 +1,17 @@
+# v0.5.7 (2026-06-21)
+
+## Features
+- **CodeBuddy CN**: API key auth + credit quota tracker
+- **CodeBuddy CN**: short model prefix alias "cbcn"
+
+## Fixes
+- **mimo-free**: Chrome User-Agent rotation to bypass anti-abuse gate
+- **cloudflare-ai**: flatten content-part arrays to string to avoid oneOf 400 (#1926)
+- **Translator**: normalize tools to Anthropic-native shape for non-Anthropic providers
+- **CLI**: handle Next.js 16 nested standalone output path (#1940)
+- **Codex**: preserve custom tools during request normalization
+- **next.config**: add new route for responses endpoint to API
+
 # v0.5.6 (2026-06-20)
 
 ## Features