import type { RegisteredProjectionKind } from "../domain/model/constants.js";
/** Protocol versions understood by the sync provider contract. */
export declare const SYNC_PROTOCOL_VERSIONS: {
    readonly V1: "typed-sheets-sync-v1";
};
export type SyncProtocolVersion = (typeof SYNC_PROTOCOL_VERSIONS)[keyof typeof SYNC_PROTOCOL_VERSIONS];
/** Projection labels accepted by the runtime provider contract. */
export declare const SYNC_PROJECTIONS: {
    readonly USER_INPUT: "user_input";
    readonly SYSTEM_STATE: "system_state";
    readonly SYNC_CONFLICTS: "sync_conflicts";
};
export type SyncProjectionKind = RegisteredProjectionKind;
/** Detail level used by normalized Sheet observation reads. */
export declare const SYNC_SNAPSHOT_READ_MODES: {
    /** Reads formula, merge, error, and stable-cell metadata for reconciliation. */
    readonly FULL: "full";
    /** Reads only user-editable literal values and row identity for polling. */
    readonly USER_INPUT: "user_input";
};
export type SyncSnapshotReadMode = (typeof SYNC_SNAPSHOT_READ_MODES)[keyof typeof SYNC_SNAPSHOT_READ_MODES];
/** Effect kinds that require special handling at the provider boundary. */
export declare const SYNC_DELETE_EFFECT_KINDS: {
    readonly RESOLUTION_DELETE: "resolution_delete";
    readonly USER_INPUT_DELETE: "user_input_delete";
};
/** Terminal and retryable statuses returned for one provider effect. */
export declare const SYNC_EFFECT_RESULT_STATUSES: {
    readonly APPLIED: "applied";
    readonly ALREADY_APPLIED: "already_applied";
    readonly SUPERSEDED: "superseded";
    readonly GUARD_MISMATCH: "guard_mismatch";
    readonly REPAIR_REOBSERVE: "repair_reobserve";
    readonly SCHEMA_ERROR: "schema_error";
    readonly RETRYABLE_ERROR: "retryable_error";
};
export type SyncEffectResultStatus = (typeof SYNC_EFFECT_RESULT_STATUSES)[keyof typeof SYNC_EFFECT_RESULT_STATUSES];
/** Result label returned when a fast-append row was accepted for writing. */
export declare const SYNC_FAST_APPEND_STATUSES: {
    readonly APPLIED: "applied";
};
export type SyncFastAppendStatus = (typeof SYNC_FAST_APPEND_STATUSES)[keyof typeof SYNC_FAST_APPEND_STATUSES];
/** How much remote read-back the provider performs before returning a write result. */
export declare const SYNC_POSTCONDITION_MODES: {
    /** Read changed rows after the write and verify their target hashes inline. */
    readonly INLINE: "inline";
    /** Return after the batched write is flushed; recovery reads verify later. */
    readonly DEFERRED: "deferred";
};
export type SyncPostconditionMode = (typeof SYNC_POSTCONDITION_MODES)[keyof typeof SYNC_POSTCONDITION_MODES];
/** Evidence level attached to a successful provider write result. */
export declare const SYNC_POSTCONDITION_STATUSES: {
    readonly VERIFIED: "verified";
    readonly ACKNOWLEDGED: "acknowledged";
    readonly UNAVAILABLE: "unavailable";
};
export type SyncPostconditionStatus = (typeof SYNC_POSTCONDITION_STATUSES)[keyof typeof SYNC_POSTCONDITION_STATUSES];
/** Read-back classification after a lost response or expired lease. */
export declare const SYNC_POSTCONDITION_DISPOSITIONS: {
    readonly APPLIED: "applied";
    readonly UNAPPLIED: "unapplied";
    readonly CHANGED: "changed";
    readonly UNAVAILABLE: "unavailable";
};
export type SyncPostconditionDisposition = (typeof SYNC_POSTCONDITION_DISPOSITIONS)[keyof typeof SYNC_POSTCONDITION_DISPOSITIONS];
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