/**
 * History Summary Builder
 *
 * Fetches workflow runs for a PR branch and calculates:
 * - Total number of runs
 * - Recent pattern (passed/failed/flaky)
 * - Success rate
 *
 * Provides context for pattern recognition without full history details.
 *
 * @packageDocumentation
 */
import type { CheckHistorySummary } from '../schemas/watch-pr-result.schema.js';
/**
 * HistorySummaryBuilder
 *
 * Builds a condensed history summary for pattern recognition.
 */
export declare class HistorySummaryBuilder {
    private readonly _owner;
    private readonly _repo;
    constructor(_owner: string, _repo: string);
    /**
     * Build history summary for a PR branch
     *
     * @param branch - Branch name
     * @returns History summary with total runs, pattern, and success rate
     */
    buildSummary(branch: string): Promise<CheckHistorySummary>;
    /**
     * Fetch workflow runs for a branch via gh CLI
     *
     * @param branch - Branch name
     * @returns Array of workflow runs (sorted by created_at DESC)
     */
    private fetchWorkflowRuns;
    /**
     * Detect pattern from recent runs
     *
     * Patterns:
     * - "Passed last N runs" - All recent runs passed
     * - "Failed last N runs" - All recent runs failed
     * - "Flaky (alternating)" - Alternating pass/fail
     * - "Recently fixed (was failing)" - Recent passes after failures
     * - Generic pattern otherwise
     *
     * @param runs - All runs (sorted DESC)
     * @returns Pattern description
     */
    private detectPattern;
    /**
     * Count consecutive runs with the same conclusion (starting from most recent)
     *
     * @param runs - Workflow runs
     * @param conclusion - Conclusion to check
     * @returns Count of consecutive runs
     */
    private countConsecutive;
    /**
     * Check if runs are alternating between success and failure
     *
     * @param runs - Workflow runs (at least 4 required)
     * @returns True if alternating pattern detected
     */
    private isAlternating;
    /**
     * Calculate success rate from recent runs
     *
     * @param runs - Recent workflow runs (up to 10)
     * @returns Success rate as percentage string (e.g., "75%")
     */
    private calculateSuccessRate;
}
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