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/*---------------------------------------------------------------------------------------------
agentHostConversationContext.ts
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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import { ResponsePartKind, type ResponsePart, type Turn } from './state/sessionState.js';
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/**
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* Options for {@link buildConversationContext}.
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*/
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export interface IConversationContextOptions {
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/**
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* Soft upper bound, in characters, for the conversation portion of the
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* produced context string. When the conversation exceeds this budget its
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* middle is removed (marked with `...`) via {@link truncateMiddle}. The
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* optional {@link framing} is always preserved in full and does not count
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* against this budget.
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*/
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readonly maxChars: number;
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/**
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* Optional framing text prepended to the conversation (e.g. a note that the
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* conversation was branched from an earlier chat). Always preserved in full
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* — only the conversation is truncated to {@link maxChars}.
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*/
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readonly framing?: string;
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}
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/**
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* Concatenates the normal textual (markdown) response parts of a turn into a
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* single string. Tool calls, reasoning, content references, and other
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* non-markdown parts are intentionally ignored so that only the assistant's
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* user-facing prose is included — this keeps utility-model prompts focused and
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* free of large tool payloads or subagent traces.
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*/
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export function renderResponseMarkdown(parts: readonly ResponsePart[]): string {
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const segments: string[] = [];
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for (const part of parts) {