import type { UnitManifest } from "../types.js";
import type { ExternalAnalyzerResults } from "audit-tools/shared";
import type { CriticalFlowManifest, RiskRegister } from "audit-tools/shared";
import type { GraphSignals } from "./graphSignals.js";
/**
 * CCU-analyzer-merge-helper-seam (risk half).
 *
 * Append an analyzer's per-unit risk signals into a risk register, returning a
 * NEW register (the input is never mutated). This is the single, pre-shipped
 * seam through which any post-build analyzer risk contribution — git-history
 * change-hotspot / broad-authorship, and any later acquired analyzer — re-enters
 * the register, so contributions can never drift in how they merge.
 *
 * Each entry of `signalsByUnit` (keyed by `unit_id`) is unioned into the
 * matching item's `signals`, deduped and re-sorted for determinism. Signals for
 * an unknown unit are ignored. `risk_score` is intentionally untouched — these
 * are informational signals; score weighting stays owned by `buildRiskRegister`.
 * Degrades to the original register (cloned) when the map is empty.
 */
export declare function mergeAnalyzerRiskSignals(register: RiskRegister, signalsByUnit: Map<string, string[]> | undefined): RiskRegister;
/**
 * Derive the churn × complexity compound signal — the real risk concentration.
 * Frequent change (`change_hotspot`, from git-history mining) on code that is
 * also structurally complex (`high_complexity`, from node_metrics) is where bugs
 * actually concentrate: each measures a different axis, and their coincidence is
 * a stronger prioritization cue than either alone. Returns a NEW register (input
 * never mutated). Kept informational (the seam invariant: analyzer-derived
 * signals never touch `risk_score`, which `buildRiskRegister` owns) — the signal
 * surfaces the concentration to lenses / synthesis without re-weighting score.
 * Idempotent: re-running never double-adds (signals are a deduped set).
 */
export declare function deriveRiskConcentration(register: RiskRegister): RiskRegister;
export declare function buildRiskRegister(unitManifest: UnitManifest, criticalFlows?: CriticalFlowManifest, externalAnalyzerResults?: ExternalAnalyzerResults[], graphSignals?: GraphSignals): RiskRegister;
//# sourceMappingURL=risk.d.ts.map