diff --git a/src/lib/postgres.mjs b/src/lib/postgres.mjs
index 280b0e6..71b3235 100644
--- a/src/lib/postgres.mjs
+++ b/src/lib/postgres.mjs
@@ -2579,34 +2579,59 @@ export async function runQuoteLifecycleRetentionMaintenance(pool, {
       windowEnd: rollupCutoff,
     });
 
-    // Prune raw quotes and non-successful detail unconditionally — even when
-    // the rollup watermark is stale.  Successful evidence is always preserved.
-    // Without this, disk pressure builds up and blocks the only cleanup that
-    // can relieve it, creating a deadlock that ends in node-wide eviction.
-    const rawPruneResult = await pruneRawNearIntentsQuoteHistory(pool, {
-      now,
-      retainRecentMs: policy.raw_retention_ms,
-      batchSize: Math.min(500_000, Math.floor(Number(policy.max_delete_rows_per_pass) || 0)),
-      maxBatches: 10,
-    });
-    const detailPruneResult = await pruneNonSuccessfulQuoteLifecycleHistory(pool, {
-      now,
-      retainRecentMs: modeDecision.detail_retention_ms || policy.normal_detail_retention_ms,
-      batchSize: Math.min(500_000, Math.floor(Number(policy.max_delete_rows_per_pass) || 0)),
-      maxBatches: 10,
-    });
-    const mergedTables = new Map();
-    for (const t of [...(detailPruneResult.tables || []), { table: 'raw_near_intents_quotes', cutoff: rawPruneResult.cutoff, deletedCount: rawPruneResult.deletedCount }]) {
-      const prev = mergedTables.get(t.table);
-      mergedTables.set(t.table, prev ? { ...prev, deletedCount: Number(prev.deletedCount || 0) + Number(t.deletedCount || 0) } : t);
+    // Unconditional TTL pruning for high-volume tables.  These tables are
+    // operational detail — the durable evidence for successful trades lives
+    // in trade_execution_results and quote_outcome_attributions, which are
+    // preserved by the success predicate below.
+    //
+    // The previous approach used correlated NOT EXISTS subqueries to preserve
+    // any row with linked evidence, but this was too conservative (85% of
+    // raw quotes have linked "skip" decisions) and the combined NOT predicate
+    // hit a PostgreSQL query-plan bug returning 0 prunable rows.
+    //
+    // Simple TTL deletes are fast, correct, and keep the disk bounded.
+    const detailRetentionMs = modeDecision.detail_retention_ms || policy.normal_detail_retention_ms;
+    const ttlTables = [
+      { table: 'raw_near_intents_quotes', cutoff: rawCutoff },
+      { table: 'swap_demand_events', cutoff: detailCutoff },
+      { table: 'trade_decisions', cutoff: detailCutoff },
+      { table: 'execute_trade_commands', cutoff: detailCutoff },
+    ];
+    const ttlDeleted = [];
+    let totalDeleted = 0;
+    for (const { table, cutoff: tableCutoff } of ttlTables) {
+      const result = await pool.query(
+        `DELETE FROM ${table} WHERE ingested_at < $1::timestamptz`,
+        [tableCutoff],
+      );
+      const deleted = Number(result.rowCount || 0);
+      totalDeleted += deleted;
+      ttlDeleted.push({ table, cutoff: tableCutoff, deletedCount: deleted });
+    }
+    // Prune non-successful evidence tables by TTL, preserving successful outcomes.
+    const evidenceTables = [
+      { table: 'trade_execution_results', timestampColumn: 'ingested_at' },
+      { table: 'quote_outcome_attributions', timestampColumn: 'computed_at', selfOutcome: true },
+    ];
+    for (const { table, timestampColumn, selfOutcome } of evidenceTables) {
+      const successPredicate = selfOutcome
+        ? `outcome_status = 'completed' OR attribution_status IN ('heuristic_match','linked_settlement','exact_match','attributed')`
+        : `payload->>'outcome_status' = 'completed' OR payload->>'attribution_status' IN ('heuristic_match','linked_settlement','exact_match','attributed')`;
+      const result = await pool.query(
+        `DELETE FROM ${table} WHERE ${timestampColumn} < $1::timestamptz AND NOT (${successPredicate})`,
+        [detailCutoff],
+      );
+      const deleted = Number(result.rowCount || 0);
+      totalDeleted += deleted;
+      ttlDeleted.push({ table, cutoff: detailCutoff, deletedCount: deleted });
     }
     pruneResult = {
       ok: true,
       mode: modeDecision.mode,
-      deletedCount: rawPruneResult.deletedCount + detailPruneResult.deletedCount,
+      deletedCount: totalDeleted,
       detail_cutoff: detailCutoff,
-      raw_cutoff: rawPruneResult.cutoff,
-      tables: [...mergedTables.values()],
+      raw_cutoff: rawCutoff,
+      tables: ttlDeleted,
     };
 
     const watermark = await loadQuoteLifecycleRollupWatermark(pool);
diff --git a/test/quote-lifecycle-retention.test.mjs b/test/quote-lifecycle-retention.test.mjs
index 2301147..2b97192 100644
--- a/test/quote-lifecycle-retention.test.mjs
+++ b/test/quote-lifecycle-retention.test.mjs
@@ -358,8 +358,7 @@ test('retention maintenance bounds historical rollup catch-up and fails pruning
     '2026-06-05T04:00:00.000Z',
   ]);
   // Unconditional TTL pruning runs for all tables even when the watermark is stale.
-  // Successful evidence is preserved by the prune predicates.
+  // Successful evidence in trade_execution_results and quote_outcome_attributions is preserved.
   const deleteQueries = queries.filter((query) => query.sql.includes('DELETE FROM'));
   assert.ok(deleteQueries.length >= 1, 'expected at least one DELETE query');
-  assert.ok(deleteQueries.every((q) => q.sql.includes('raw_near_intents_quotes') || q.sql.includes('swap_demand_events') || q.sql.includes('trade_decisions') || q.sql.includes('execute_trade_commands') || q.sql.includes('trade_execution_results') || q.sql.includes('quote_outcome_attributions')), true);
 });