/** Wire-stable projection for durable idempotency request digests.
 *
 * Request digests are hashed from the PARSED request, so a schema field that
 * parses in with an injected default changes the digest of byte-identical
 * wire requests across an engine upgrade: replaying the same Idempotency-Key
 * after the upgrade would then 409 (`idempotency_conflict`) instead of
 * returning the original handle. 3.3.7 added exactly two such fields —
 * `execution.delegated` and project `scope.ephemeral` — that neither
 * published 3.2.1 nor 3.3.7-rc.0 parsed, so their records hold digests
 * without those properties. Before hashing, strip those fields while they
 * still carry their injected default, reproducing the exact shape earlier
 * engines hashed; an explicit `true` is semantic and stays in the digest.
 *
 * INVARIANT: every future request field that parses in with a default MUST be
 * elided here in the same release that adds it, or upgrade replays break again.
 */
export declare function idempotencyWireProjection(request: unknown): unknown;
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