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Use token-based maxTokens instead of fraction-based reserveFraction

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- BranchSummarySettings.maxTokens (default 100000) instead of reserveFraction
- More intuitive and consistent with CompactionSettings.keepRecentTokens
This commit is contained in:
Mario Zechner 2025-12-29 21:34:50 +01:00
parent 839a46e6fe
commit f5f39f08f1
3 changed files with 8 additions and 12 deletions
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12
packages/coding-agent/src/core/compaction/branch-summarization.ts
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@ -53,8 +53,8 @@ export interface GenerateBranchSummaryOptions {
signal: AbortSignal;
/** Optional custom instructions for summarization */
customInstructions?: string;
/** Reserve this fraction of context window for summary (default 0.2) */
reserveFraction?: number;
/** Maximum tokens to include in summary context (default 100000) */
maxTokens?: number;
}
// ============================================================================
@ -321,13 +321,9 @@ export async function generateBranchSummary(
entries: SessionEntry[],
options: GenerateBranchSummaryOptions,
): Promise<BranchSummaryResult> {
const { model, apiKey, signal, customInstructions, reserveFraction = 0.2 } = options;
const { model, apiKey, signal, customInstructions, maxTokens = 100000 } = options;
// Calculate token budget (leave room for summary generation)
const contextWindow = model.contextWindow || 128000;
const tokenBudget = Math.floor(contextWindow * (1 - reserveFraction));
const { messages, fileOps } = prepareBranchEntries(entries, tokenBudget);
const { messages, fileOps } = prepareBranchEntries(entries, maxTokens);
if (messages.length === 0) {
return { summary: "No content to summarize" };