flowchart LR
    subgraph System["Disk Cache System"]
        direction TB
        LKML_CACHE["LKML Cache output/lkml/<br/>Group by message ID<br/>Auto-create directories<br/>.cover .mbx files"]
        RSS_CACHE["RSS Cache output/rss/<br/>MD5 hash naming<br/>.txt format<br/>Metadata included"]
        CGIT_CACHE["CGit Cache output/cgit/<br/>Group by commit ID<br/>Auto-create directories<br/>commit files"]
    end

    style System fill:#e8f5e9,stroke:#1b5e20,stroke-width:2px
