/**
 * Wire 0.2 recommended receipt type and extension group registries.
 *
 * Single source of truth: specs/kernel/registries.json
 * Generated constants: @peac/kernel registries.generated.ts
 *
 * Used by @peac/protocol.verifyLocal() to emit type_unregistered and
 * unknown_extension_preserved warnings for valid-but-unrecognized values.
 */
/**
 * Recommended receipt type values from the receipt_types registry.
 * A type NOT in this set triggers a type_unregistered warning (not an error).
 */
export declare const REGISTERED_RECEIPT_TYPES: ReadonlySet<string>;
/**
 * Core extension group keys that have typed schemas in @peac/schema.
 * An extension key NOT in this set (but passing grammar validation)
 * triggers an unknown_extension_preserved warning (not an error).
 *
 * Derived from EXTENSION_GROUPS in @peac/kernel (generated from
 * specs/kernel/registries.json). No manual maintenance required.
 */
export declare const REGISTERED_EXTENSION_GROUP_KEYS: ReadonlySet<string>;
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