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Change default compression threshold #12306

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Merged
scidomino merged 1 commit into from
Oct 30, 2025
Merged

Change default compression threshold #12306

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12 changes: 5 additions & 7 deletions packages/core/src/services/chatCompressionService.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -17,10 +17,10 @@ import { makeChatCompressionEvent } from '../telemetry/types.js';
import { getInitialChatHistory } from '../utils/environmentContext.js';

/**
* Threshold for compression token count as a fraction of the model's token limit.
* If the chat history exceeds this threshold, it will be compressed.
* Default threshold for compression token count as a fraction of the model's
* token limit. If the chat history exceeds this threshold, it will be compressed.
*/
export const COMPRESSION_TOKEN_THRESHOLD = 0.7;
export const DEFAULT_COMPRESSION_TOKEN_THRESHOLD = 0.2;

/**
* The fraction of the latest chat history to keep. A value of 0.3
Expand Down Expand Up @@ -104,13 +104,11 @@ export class ChatCompressionService {

const originalTokenCount = uiTelemetryService.getLastPromptTokenCount();

const contextPercentageThreshold =
config.getChatCompression()?.contextPercentageThreshold;

// Don't compress if not forced and we are under the limit.
if (!force) {
const threshold =
contextPercentageThreshold ?? COMPRESSION_TOKEN_THRESHOLD;
config.getChatCompression()?.contextPercentageThreshold ??
DEFAULT_COMPRESSION_TOKEN_THRESHOLD;
if (originalTokenCount < threshold * tokenLimit(model)) {
return {
newHistory: null,
Expand Down