docs: add CCS to projects list

README.md

@@ -90,6 +90,10 @@ Native macOS menu bar app to use your Claude Code & ChatGPT subscriptions with A
 
 Browser-based tool to translate SRT subtitles using your Gemini subscription via CLIProxyAPI with automatic validation/error correction - no API keys needed
 
+### [CCS (Claude Code Switch)](https://github.com/kaitranntt/ccs)
+
+CLI wrapper for instant switching between multiple Claude accounts and alternative models (Gemini, Codex, AGY) via CLIProxyAPI OAuth - no API keys needed
+
 > [!NOTE]  
 > If you developed a project based on CLIProxyAPI, please open a PR to add it to this list.