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Summarizer

aster::context::summarizer

Struct Summarizer 

Source 
pub struct Summarizer;
Expand description

Intelligent summarizer for conversation turns.

Provides methods to generate concise summaries of conversation history, either using AI or simple text extraction.

Implementations§

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impl Summarizer

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pub async fn generate_ai_summary( turns: &[ConversationTurn], client: &dyn SummarizerClient, context_budget: usize, ) -> Result<String, ContextError>

Generate an AI-powered summary of conversation turns.

Uses an LLM to create a concise summary capturing the main task, key files, problems addressed, and current status.

§Arguments
  • turns - The conversation turns to summarize
  • client - The LLM client to use for summarization
  • context_budget - Maximum tokens to include in the summarization request
§Returns

A summary string, or falls back to simple summary on failure.

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pub fn create_simple_summary(turns: &[ConversationTurn]) -> String

Create a simple summary without using AI.

Extracts key information from conversation turns including:

  • Number of turns
  • Key topics mentioned
  • Files referenced
  • Tools used
§Arguments
  • turns - The conversation turns to summarize
§Returns

A simple text summary.

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pub fn collect_within_budget( turns: &[ConversationTurn], budget: usize, ) -> (Vec<ConversationTurn>, usize)

Collect conversation turns within a token budget.

Iterates through turns from oldest to newest, collecting as many as will fit within the specified token budget.

§Arguments
  • turns - The conversation turns to collect from
  • budget - Maximum tokens to collect
§Returns

A tuple of (collected turns, total tokens used).

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pub fn format_turns_as_text(turns: &[ConversationTurn]) -> String

Format conversation turns as readable text for summarization.

Creates a structured text representation of the conversation suitable for sending to an LLM for summarization.

§Arguments
  • turns - The conversation turns to format
§Returns

A formatted text string.

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pub fn extract_message_text(message: &Message) -> String

Extract text content from a message.

Concatenates all text content blocks from the message, ignoring non-text content like images or tool calls.

§Arguments
  • message - The message to extract text from
§Returns

The concatenated text content.

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pub fn estimate_summary_tokens(summary: &str) -> usize

Estimate the token count for a summary.

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