/**
 * assessment/sources — what each reason rests on
 * (`AnswerAssessment.reasons[].source`): specific calls, the answer itself, or
 * the run as a whole.
 *
 * Pattern: a projection inside the one Fold (`assess.ts` · `assessAnswer`).
 *          The KIND is declared per reason (`reasons.ts` · `REASONS`); for a
 *          `calls` reason this module reads the calls off the very rows the
 *          reason's witnesses point at — a history result carries its call id,
 *          a committed row names its call — and the call's tool name off the
 *          same row, or off the run's `history` for a row that names only an id.
 *          It reads the committed record only, and adds nothing to it.
 * Role:    core/ layer, pure. Asked once per fired reason by the fold; every
 *          reader takes the source from the fold — the answer layer's line
 *          (`compose.ts` · `standingLineOf`) and the answer account's "How
 *          sure" counts (`answer-account/facts/howSure.ts`) — and never
 *          re-derives it.
 * Emits:   N/A.
 *
 * ## Names and ids only
 *
 * A source holds call ids and registered tool names, never a value, an
 * argument or a result: the rows it reads hold more, and it copies two strings
 * out of each.
 *
 * ## Which calls a row names
 *
 * - a tool result in `history` — its own call;
 * - a coverage, argument, period or middleware row — its own call (the row's
 *   `toolCallId`, with the row's `toolName`);
 * - a conflict row — the calls of the readings that disagree (`witnesses`);
 * - a contingent row — the results the value came from (`carriers`), and an
 *   argument row behind `value-contingent` — the result it names (`result`):
 *   the reason is that a value came from results the model itself set aside;
 * - an answer check that names its tool and not its call
 *   (`declaration-overclaimed`, the report row's `tools` — kept by the one
 *   projection onto the report, `negativeClaims/delivery.ts` ·
 *   `reportWithNegatives`) — every call of that tool this turn: it may
 *   over-report, it never hides (the fold's rule for "rests on").
 *
 * A row that names no call, a call whose tool's name the record does not
 * hold, and every entry of a list (a conflict's readings, a contingent value's
 * carriers, an answer check's tools) that names no call — beside the entries
 * that do — is COUNTED in `unnamed`, never dropped and never guessed. Only a
 * known call id is said once.
 *
 * ## A list is read by index, never through its own code
 *
 * Every list on a row — a conflict's readings, a contingent value's carriers,
 * an answer check's tools, a request's `toolCalls` — is read through ONE
 * reader, `rowList` (`lib/boundedJson.ts` · `readOwnList`, the bounded-copy
 * convention as a reader): a plain array only, its own `length`, the own data
 * property at each index, at most `MAX_ROW_LIST_ENTRIES`. A record handed to
 * `assessAnswer` may be host-built, so a list can be sparse, carry its own
 * iterator or put a getter at an index: the iterator and the getter are never
 * called. A hole or a getter's entry names no call; the entries past the bound
 * are counted, never read; a value that is not a plain array is not trusted as
 * a list — one call the record cannot name. Each is counted in `unnamed`.
 */
import { type OwnList } from '../../../lib/boundedJson.js';
import type { AssessmentPointer, AssessmentReason, AssessmentReasonSource } from './types.js';
/** The most entries the fold reads off one list on a row; the rest are counted, never read. */
export declare const MAX_ROW_LIST_ENTRIES = 1000;
/**
 * A list on a row, as the fold reads it — THE one reader, shared by the
 * projection here and the fold's placement (`assess.ts` · `conflictOfThisTurn`,
 * `callsNamedBy`): `readOwnList` at `MAX_ROW_LIST_ENTRIES`. `undefined` when
 * the value is not a plain array.
 */
export declare function rowList(value: unknown): OwnList | undefined;
/** What the projection reads: the committed state, and this turn's results (for a tool-name join). */
export interface SourceRead {
    readonly state: Readonly<Record<string, unknown>>;
    readonly turnResults: readonly {
        readonly toolCallId?: string;
        readonly toolName?: string;
    }[];
}
/**
 * What one fired reason rests on — its declared `kind`, and for `calls` the
 * calls its witnesses' rows name, each once, in witness order.
 *
 * @example
 * ```ts
 * reasonSourceOf('declared-absent', 'calls', [historyPointer], read);
 * // { kind: 'calls', calls: [{ toolCallId: 'c1', toolName: 'load_attachment' }] }
 * reasonSourceOf('stopped-early', 'run', [statePointer('stoppedEarly')], read);
 * // { kind: 'run' }
 * ```
 */
export declare function reasonSourceOf(reason: AssessmentReason, kind: AssessmentReasonSource['kind'], witness: readonly AssessmentPointer[], read: SourceRead): AssessmentReasonSource;