import type { JsonObject } from "../contracts/json-object.js";
import type { WorkspaceExecutionContext } from "./workspace-router-model.js";
export type AttributedReadToolName = "safe_read" | "file_outline" | "read_range";
export declare function buildWorkspaceReadObservation(execution: WorkspaceExecutionContext, toolName: AttributedReadToolName, args: JsonObject, result: JsonObject): {
    readonly surface: string;
    readonly projection: string;
    readonly sourceLayer: "canonical_structural_truth" | "workspace_overlay";
    readonly reason: string;
    readonly footprint: {
        readonly paths: string[];
        readonly symbols: string[];
        readonly regions: {
            readonly path: string;
            readonly startLine: number;
            readonly endLine: number;
        }[];
    };
} | null;
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