diff --git a/scripts/package-artifacts.mjs b/scripts/package-artifacts.mjs
index c687326f..635af69d 100644
--- a/scripts/package-artifacts.mjs
+++ b/scripts/package-artifacts.mjs
@@ -992,6 +992,27 @@ try {
   requireOutput('ktx runtime stop', runtimeStop, /Stopped KTX Python daemon/);
   process.stdout.write('ktx runtime daemon lifecycle verified\\n');
 
+  const staleRuntimeDir = join(process.env.KTX_RUNTIME_ROOT, '0.0.0');
+  await mkdir(staleRuntimeDir, { recursive: true });
+
+  const runtimePruneDryRun = await run('pnpm', ['exec', 'ktx', 'runtime', 'prune', '--dry-run']);
+  requireSuccess('ktx runtime prune dry run', runtimePruneDryRun);
+  requireOutput('ktx runtime prune dry run', runtimePruneDryRun, /Stale KTX Python runtimes/);
+  requireOutput('ktx runtime prune dry run', runtimePruneDryRun, /0\\.0\\.0/);
+  await access(staleRuntimeDir);
+
+  const runtimePruneNeedsConfirmation = await run('pnpm', ['exec', 'ktx', 'runtime', 'prune']);
+  assert.equal(runtimePruneNeedsConfirmation.code, 1, 'ktx runtime prune needs confirmation');
+  assert.equal(runtimePruneNeedsConfirmation.stdout, '', 'ktx runtime prune needs confirmation wrote stdout');
+  assert.match(runtimePruneNeedsConfirmation.stderr, /Refusing to prune without --yes/);
+
+  const runtimePruneConfirmed = await run('pnpm', ['exec', 'ktx', 'runtime', 'prune', '--yes']);
+  requireSuccess('ktx runtime prune confirmed', runtimePruneConfirmed);
+  requireOutput('ktx runtime prune confirmed', runtimePruneConfirmed, /Removed stale KTX Python runtimes/);
+  requireOutput('ktx runtime prune confirmed', runtimePruneConfirmed, /0\\.0\\.0/);
+  await assert.rejects(() => access(staleRuntimeDir));
+  process.stdout.write('ktx runtime prune verified\\n');
+
   const structuralScan = await run('pnpm', ['exec', 'ktx', 'dev', 'scan', 'warehouse',
     '--project-dir',
     projectDir,
diff --git a/scripts/package-artifacts.test.mjs b/scripts/package-artifacts.test.mjs
index b5a190f7..de051d59 100644
--- a/scripts/package-artifacts.test.mjs
+++ b/scripts/package-artifacts.test.mjs
@@ -583,6 +583,13 @@ describe('verification snippets', () => {
     assert.match(source, /ktx runtime start reuse/);
     assert.match(source, /Using existing KTX Python daemon/);
     assert.match(source, /ktx runtime stop/);
+    assert.match(source, /ktx runtime prune dry run/);
+    assert.match(source, /0\.0\.0/);
+    assert.match(source, /ktx runtime prune needs confirmation/);
+    assert.match(source, /Refusing to prune without --yes/);
+    assert.match(source, /ktx runtime prune confirmed/);
+    assert.match(source, /Removed stale KTX Python runtimes/);
+    assert.match(source, /assert\.rejects\(\(\) => access\(staleRuntimeDir\)\)/);
     assert.match(source, /run\('pnpm', \[\s*'exec',\s*'ktx',\s*'dev',\s*'scan',\s*'warehouse'/);
     assert.match(source, /'--mode',\s*'enriched'/);
     assert.doesNotMatch(source, /'--enrich'/);