Contract-suite queue-depth rows (task suite-queue-depth-rows): the job-handle validity predicate row (in-window heartbeat/ack landing, late-heartbeat/post-lapse-ack/retry/fail refusals past a 1 s stamp with the row untouched, ack_batch per-id predicate live-1/lapsed-0/nonexistent-0, fail(None)→"failed" and retry-at-budget→"max attempts exceeded"), the ADR-010 depth row (reclaim consumes an attempt with claimed_at/deadline refreshed and the original holder refusing, reclaim-exhaustion dead-lettering with the pre-claim sweep — get_job-visible "max attempts exceeded"+died_at, cancel unconditional delete with the not-an-interrupt refusal shape plus pending/dead/missing arms), and the no-stranded-rows sweep row (both states move with "expired", unexpired/never-expiring untouched, retention TTL enforcing with the moved+deleted sum, None=forever) — each version-stamped per the suite convention (ADR-010 §1–§5, ADR-019 §3, ADR-008 §5), wired into both engines' suite targets (SQLite tokio tests, pg harness_row!s). M-1's retention-failure pin dispositioned engine-side per the task's honest call: the storage-level DELETE failure is not injectable through the contract surface, so it lands in the SQLite substrate's trigger seam (sweep_rolls_back_the_retention_half_with_the_move — the move half rolls back with the retention half), with the pg twin verified structurally (both halves inside in_tx's frame) and the disposition recorded in the task Notes. Verified: sqlite suite 13/13, pg suite 13/13 vs harness twice (postgres/poc@:15432), substrate sweep-rollback tests 4/4, workspace build/test green, clippy -D warnings, fmt clean

alkstore-sqlite/tests/contract_suite.rs

@@ -69,8 +69,9 @@ mod rows {
     use alkstore_contract_suite::properties::{
         drop_rollback_leaves_no_ghosts, duration_refusal_on_non_positive_ttl,
         enqueue_opts_resolution, extent_clamp_semantics, in_tx_reads_see_own_writes,
-        name_validation_rejects_empty_and_reserved, payload_round_trip_stores_exact_encoding,
-        payload_too_large_never_produced_on_sqlite, receiver_close_and_save_arms,
+        job_handle_validity_predicate, name_validation_rejects_empty_and_reserved,
+        payload_round_trip_stores_exact_encoding, payload_too_large_never_produced_on_sqlite,
+        queue_depth_reclaim_and_dead_letter, receiver_close_and_save_arms, sweep_no_stranded_rows,
     };
 
     use super::SqliteFactory;
@@ -123,6 +124,21 @@ mod rows {
     async fn row_receiver_close_and_save_arms() {
         receiver_close_and_save_arms(&factory("row-receiver-arms")).await;
     }
+
+    #[tokio::test(flavor = "multi_thread")]
+    async fn row_job_handle_validity_predicate() {
+        job_handle_validity_predicate(&factory("row-handle-predicate")).await;
+    }
+
+    #[tokio::test(flavor = "multi_thread")]
+    async fn row_queue_depth_reclaim_and_dead_letter() {
+        queue_depth_reclaim_and_dead_letter(&factory("row-queue-depth")).await;
+    }
+
+    #[tokio::test(flavor = "multi_thread")]
+    async fn row_sweep_no_stranded_rows() {
+        sweep_no_stranded_rows(&factory("row-sweep-stranded")).await;
+    }
 }
 
 mod factory_shape {