/**
 * scripts/label — the ONE rule that turns a code call's record into a label,
 * and the label's words.
 *
 * Pattern: pure function over two separate facts (design § 4.3).
 * Role:    core/ layer leaf. Asked by the dispatch loop when it files a call's
 *          `script` row (`rows.ts` · `scriptRowFor`); every sentence that names
 *          an outcome — the attachment's label line, the recovery clause, the
 *          answer account — reads the row's label through {@link labelWords}.
 * Emits:   N/A.
 *
 * ## Three facts, read in one order
 *
 * The record holds three facts about a code call, written by three mechanisms:
 * EXECUTION evidence (the runner's facts — `codeRunnerTool.ts` ·
 * `CodeRunFacts`, taken right after `tool.execute` returns), call SETTLEMENT
 * (did the call return, throw, or never enter `execute`) and result DELIVERY
 * (the tool's ceiling replaced the payload). A label is read from execution
 * evidence first, then settlement, and NEVER from delivery: a withheld result
 * does not undo a completed execution (it rides the row as `resultWithheld`).
 *
 * | the record says | label |
 * |---|---|
 * | an explicit `exitCode: 0` | `completed` |
 * | an explicit non-zero `exitCode` (a whole number — {@link isExitCode}) | `completed-with-failure` |
 * | `serviceError` and no exit code | `outcome-unknown` |
 * | `ok: true`, no exit code | `reported-success` |
 * | `ok: false`, no exit code, no service error (a stopped process included) | `reported-failure` |
 * | facts that report no outcome (`ok` absent, no exit code) | — no execution evidence: the settlement decides |
 * | no facts, the call returned | `returned` |
 * | no facts, the call threw (a timeout, a cancellation, a staging refusal) | `outcome-unknown` |
 * | the call never entered `execute` (or has not settled) | `submitted` |
 *
 * Only an explicit exit code proves the program reached an exit. `ok` is a
 * VERDICT: it never yields `completed`, and no word here prints an exit number
 * the record does not hold.
 *
 * @example
 * ```ts
 * scriptLabelOf({ settlement: 'returned', facts: { exitCode: 0 } });          // { label: 'completed', exitCode: 0 }
 * scriptLabelOf({ settlement: 'returned', facts: { ok: false, serviceError: true } }); // { label: 'outcome-unknown', serviceError: true }
 * scriptLabelOf({ settlement: 'threw' });                                      // { label: 'outcome-unknown' }
 * labelWords('completed-with-failure', 7);                                     // 'completed with failure, exit 7'
 * ```
 */
import type { ScriptLabel } from './types.js';
/** How a call settled, as the dispatch loop knows it. */
export type CallSettlement = 
/** Never entered `execute`: not dispatched, refused before it, or still open. */
'not-entered'
/** `execute` returned a result. */
 | 'returned'
/** `execute` was entered and threw (a timeout, a cancellation, any error). */
 | 'threw';
/** The runner facts a label reads — `CodeRunFacts`' outcome half. */
export interface RunnerOutcome {
    readonly ok?: boolean;
    readonly exitCode?: number;
    readonly serviceError?: true;
    readonly terminatedBy?: string;
}
/** A label, with the facts it may print. */
export interface ScriptOutcome {
    readonly label: ScriptLabel;
    /** Exactly the runner's, only when it supplied one. */
    readonly exitCode?: number;
    /** The failure verdict was the service's, with no exit code. */
    readonly serviceError?: true;
}
/**
 * Whether `value` is an exit code: a whole number, as a process reports one
 * (a negative one included — a signal, on some runtimes). THE rule for every
 * writer and reader of a script's exit code — the label below, and the
 * readers of a saved record (`rows.ts` · `scriptRowIsWellFormed`,
 * `attachment.ts` · `recordedScripts`, `match.ts` · `recordedBlocks`), so the
 * writer never files a row the checkpoint door refuses. A runner that reports
 * anything else (`1.5`, `NaN`) reported no exit code.
 */
export declare const isExitCode: (value: unknown) => value is number;
/**
 * Whether a recorded label and exit code agree, as {@link scriptLabelOf}
 * writes them: an exit code rides exactly the two labels one proves — `0` on
 * `completed`, any other on `completed-with-failure` — and no other label.
 * A record where they disagree holds a value no writer of this library files.
 */
export declare function exitCodeFits(label: unknown, exitCode: unknown): boolean;
/**
 * The label of one call — execution evidence first, then settlement. `facts`
 * is ABSENT when the tool filed none (a declared tool that is not
 * `codeRunnerTool`, or a call that never reached its runner).
 */
export declare function scriptLabelOf(input: {
    readonly settlement: CallSettlement;
    readonly facts?: RunnerOutcome;
}): ScriptOutcome;
/**
 * The label's own words — the one phrase every library sentence about a call's
 * outcome uses (design § 4.3). `exitCode` is printed only for
 * `completed-with-failure`, and only the number the record holds.
 */
export declare function labelWords(label: ScriptLabel, exitCode?: number): string;
/** Every label, in the design's order — for a reader that validates one. */
export declare const SCRIPT_LABELS: readonly ScriptLabel[];