import type { CommandIO, CommandResult } from './io.js';
/**
 * `cadence explain [concept]` — in-CLI concept help (phase 64).
 *
 * Prints curated, terminal-sized explanations of CADENCE's core concepts so a
 * user can learn the model without leaving the terminal or depending on the
 * `docs/` tree being shipped with the package. Content is **embedded** here
 * (distilled from `docs/concepts.md`), never read from disk at runtime, so it
 * works identically from any install. `explain.test.ts` AC-5 guards that every
 * advertised concept keeps non-empty content — the in-repo analog of the
 * `commands.md` drift guard.
 *
 * Relocated from `cli/commands/explain.ts` into `services/explain.ts` (phase
 * 221 T3) so `mcp/tools.ts` can import it directly. Pure relocation — CLI
 * behavior, output text, flags, and exit codes are unchanged.
 */
/** A single explainable concept: a one-line list blurb + the full body text. */
export interface Concept {
    /** One-line summary shown in the discovery list. */
    blurb: string;
    /** The full explanation printed for `cadence explain <name>`. */
    body: string;
}
/**
 * The canonical concept registry. Keys are the canonical names advertised in
 * the list; aliases resolve to these via {@link ALIASES}.
 */
export declare const CONCEPTS: Record<string, Concept>;
/**
 * Run the explain command. Pure over its `io` sink (no process access, no file
 * I/O), so the same path serves the CLI and tests.
 */
export declare function runExplain(args: {
    concept?: string;
}, io: CommandIO): CommandResult;
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