Struct MessageWindowView 

pub struct MessageWindowView<'a> {
    pub messages: &'a mut Vec<Message>,
    pub last_persisted_message_id: &'a mut Option<i64>,
    pub deferred_db_hide_ids: &'a mut Vec<i64>,
    pub deferred_db_summaries: &'a mut Vec<String>,
    pub cached_prompt_tokens: &'a mut u64,
    pub token_counter: Arc<TokenCounter>,
    pub completed_tool_ids: &'a mut HashSet<String>,
}

Borrow-lens over the agent’s conversation window fields.

Holds &mut references to every message-list field that the context service needs to read or write. Constructed by the zeph-core shim from disjoint sub-fields of Agent<C>::msg.

Fields

messages: &'a mut Vec<Message>

Full message history. The context service reads and filters this list.

last_persisted_message_id: &'a mut Option<i64>

SQLite row ID of the most recently persisted message.

deferred_db_hide_ids: &'a mut Vec<i64>

SQLite row IDs to be soft-deleted after context assembly completes.

deferred_db_summaries: &'a mut Vec<String>

Deferred summary strings to be appended after context assembly completes.

cached_prompt_tokens: &'a mut u64

Running token count for the current prompt window — updated after every message-list mutation to keep provider call budgets accurate. Maps to Agent<C>::runtime.providers.cached_prompt_tokens.

token_counter: Arc<TokenCounter>

Shared token counter — cheap Arc clone from Agent<C>::runtime.metrics.token_counter.

completed_tool_ids: &'a mut HashSet<String>

Tool IDs that completed successfully in the current session. Maps to Agent<C>::services.tool_state.completed_tool_ids. Cleared by clear_history together with the message list.