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```mermaid
%% ROUTER Mode Data Flow (multi-model)
%% Detailed flows: ./flows/server-flow.mmd, ./flows/models-flow.mmd, ./flows/chat-flow.mmd
sequenceDiagram
participant User as đ¤ User
participant UI as 𧊠UI
participant Stores as đī¸ Stores
participant DB as đž IndexedDB
participant API as đ llama-server
Note over User,API: đ Initialization (see: server-flow.mmd, models-flow.mmd)
UI->>Stores: initialize()
Stores->>DB: load conversations
Stores->>API: GET /props
API-->>Stores: {role: "router"}
Stores->>API: GET /v1/models
API-->>Stores: models[] with status (loaded/available)
loop each loaded model
Stores->>API: GET /props?model=X
API-->>Stores: modalities (vision/audio)
end
Note over User,API: đ Model Selection (see: models-flow.mmd)
User->>UI: select model
alt model not loaded
Stores->>API: POST /models/load
loop poll status
Stores->>API: GET /v1/models
API-->>Stores: check if loaded
end
Stores->>API: GET /props?model=X
API-->>Stores: cache modalities
end
Stores->>Stores: validate modalities vs conversation
alt valid
Stores->>Stores: select model
else invalid
Stores->>API: POST /models/unload
UI->>User: show error toast
end
Note over User,API: đŦ Chat Flow (see: chat-flow.mmd)
User->>UI: send message
UI->>Stores: sendMessage()
Stores->>DB: save user message
Stores->>API: POST /v1/chat/completions {model: X}
Note right of API: router forwards to model
loop streaming
API-->>Stores: SSE chunks + model info
Stores-->>UI: reactive update
end
API-->>Stores: done + timings
Stores->>DB: save assistant message + model used
Note over User,API: đ Regenerate (optional: different model)
User->>UI: regenerate
Stores->>Stores: validate modalities up to this message
Stores->>DB: create message branch
Note right of Stores: same streaming flow
Note over User,API: âšī¸ Stop
User->>UI: stop
Stores->>Stores: abort stream
Stores->>DB: save partial response
Note over User,API: đī¸ LRU Unloading
Note right of API: Server auto-unloads LRU models<br/>when cache full
User->>UI: select unloaded model
Note right of Stores: triggers load flow again
```
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