/**
 * Copyright 2025 Vybestack LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import type { ThinkingBlock } from '../../services/history/IContent.js';
import type { DebugLogger } from '../../debug/index.js';
/**
 * Extract thinking content from <think>, <thinking>, or <analysis> tags
 * and return it as a ThinkingBlock. Returns null if no thinking tags found.
 *
 * Must be called BEFORE sanitizeProviderText which strips these tags.
 *
 * Handles two formats:
 * 1. Standard: <think>Full thinking paragraph here...</think>
 * 2. Fragmented (Synthetic API): <think>word</think><think>word</think>...
 *
 * For fragmented format, joins with spaces. For standard, joins with newlines.
 */
export declare function extractThinkTagsAsBlock(text: string, logger?: DebugLogger): ThinkingBlock | null;