```mermaid
graph LR
    subgraph Kortex [Kortex Hub: Capture, Synthesis, Writing]
        A["1. Capture & Ideation (Kortex, Readwise)"];
        A --> B["2. Research (Kortex Library, kAI)"];
        B --> C["3. Development & Outlining (Kortex, kAI)"];
        C --> D{Identify Actionable Step?};
        D -- Yes --> T_H;
        D -- No --> E;
        C --> E["5. Drafting & Writing (Kortex)"];
        E --> F["6. Editing (Kortex, kAI)"];
        F --> G{Repurpose?};
        G -- Yes --> H["7. Content Repurposing (Kortex)"];
        G -- No --> I;
        H --> I["Final Content Piece (in Kortex)"];
        H --> T_H2;
    end

    subgraph Tana [Tana for Kortex: GTD Support & Review]
        T_H["4. Define Actionable Task in Tana (#task)"];
        T_H2["8. Define Publishing Task in Tana (#task)"];
        T_H -- Add Kortex Link --> T_I;
        T_H2 -- Add Kortex Link --> T_I;
        T_I["9. Schedule & Manage Task (Tana)"];
        T_I --> T_J{Execute Task?};
        T_J -- Ref Kortex --> E; 
        T_J -- Ref Kortex --> F;
        T_J -- Ref Kortex --> Ext_M;
        T_K["10. Mark Task Done (Tana)"];
        T_L["11. Review (Tana Daily/Weekly/Quarterly)"];
        T_K --> T_L;
        T_L --> T_H; 
    end

    subgraph External [External Tools]
        Ext_M["Publish Content (Website, Social)"];
    end

    I --> Ext_M; 
    Ext_M --> T_K;

    style Kortex fill:#ddf,stroke:#333,stroke-width:2px
    style Tana fill:#fdf,stroke:#333,stroke-width:2px
    style External fill:#dfd,stroke:#333,stroke-width:2px
```