/**
 * `qfg migrate --from launchdarkly` — the MigrationSource implementation.
 *
 * Wires the LaunchDarkly fetcher (`launchdarkly/api.ts`) and converter
 * (`launchdarkly/translate.ts`) into the source-agnostic migration framework.
 * Both write modes (`--dir`, `--push`) are inherited for free — this source
 * only has to produce `QuonfigFile[]`.
 *
 * Design is frozen in `launchdarkly.README.md` / `project/plans/migrator-launch-darkly.md`.
 */
import { ConversionReport } from '../quonfig-target/report.js';
import { type MigrationSource } from '../source.js';
import { type RetentionHorizon } from './launchdarkly/audit.js';
/**
 * Override the LaunchDarkly project key for this run. Called by the `qfg migrate`
 * command from its `--project` flag (which itself falls back to the
 * `LAUNCHDARKLY_PROJECT_KEY` env var). Mirrors `applyLaunchDarklyBaseUrl()` —
 * the command layer threads run-scoped config into the source singleton.
 */
export declare function setLaunchDarklyProjectKey(projectKey: string): void;
/**
 * Enable Phase-2 history backfill for this run. When set, `fetchChanges` walks
 * the LaunchDarkly audit log instead of taking a current-state snapshot, and
 * `validateAuth` runs the retention pre-flight. Called by `qfg migrate` from
 * its `--full-summary` flag.
 */
export declare function setLaunchDarklyFullSummary(on: boolean): void;
/**
 * The retention pre-flight result from the last full-summary `validateAuth`,
 * or null. The command reads this and tells the user the real history horizon
 * BEFORE the slow audit walk starts (plan §4.1.1).
 */
export declare function getLaunchDarklyRetentionHorizon(): null | RetentionHorizon;
/** The full conversion report — every skip/drop/coerce note from this run. */
export declare function getConversionReport(): ConversionReport;
export declare const launchdarklySource: MigrationSource;
export declare function __resetLaunchDarklySourceForTests(): void;