ClearToolUsesEdit

import { ClearToolUsesEdit } from "langchain";

const edit = new ClearToolUsesEdit({
  trigger: { tokens: 100000 },  // Start clearing at 100K tokens
  keep: { messages: 3 },        // Keep 3 most recent tool results
  excludeTools: ["important"],   // Never clear "important" tool
  clearToolInputs: false,        // Keep tool call arguments
  placeholder: "[cleared]",      // Replacement text
});

// Multiple trigger conditions
const edit2 = new ClearToolUsesEdit({
  trigger: [
    { tokens: 100000, messages: 50 },
    { tokens: 50000, messages: 100 }
  ],
  keep: { messages: 3 },
});

// Fractional trigger with model profile
const edit3 = new ClearToolUsesEdit({
  trigger: { fraction: 0.8 },  // Trigger at 80% of model's max tokens
  keep: { fraction: 0.3 },     // Keep 30% of model's max tokens
});