diff --git a/commands/par2_prune.ts b/commands/par2_prune.ts
new file mode 100644
index 0000000..0ac204c
--- /dev/null
+++ b/commands/par2_prune.ts
@@ -0,0 +1,17 @@
+import { BaseCommand } from '@adonisjs/core/ace'
+import type { CommandOptions } from '@adonisjs/core/types/ace'
+import db from '@adonisjs/lucid/services/db'
+import { Par2Pruner } from '#services/par2_pruner'
+
+/** The par2 prune (Par2Pruner) in one go: a whole pass from the first set, instead of the merger's 2 minutes an hour. */
+export default class Par2Prune extends BaseCommand {
+  static commandName = 'par2:prune'
+  static description = 'Drops the par2 file lists the merge can no longer use: one whole pass over every set, then exits'
+  static options: CommandOptions = { startApp: true }
+
+  async run() {
+    await db.from('worker_cursors').where('name', 'par2-prune').update({ key: '' })
+    const round = await new Par2Pruner().round()
+    this.logger.info(`Pruned ${round.rows} par2 file rows: ${round.complete} complete sets, ${round.judged} judged, ${round.final} final.`)
+  }
+}