fix(subagent): close stacked catalog integration gaps

examples/acp-agent/tests/fixtures/subagent-settlement-marker.ts

@@ -0,0 +1,13 @@
+import { writeFileSync } from 'node:fs'
+import { join } from 'node:path'
+import type { Context } from 'cordis'
+import type {} from '@deepseek-ai/dsh-subagent'
+
+export const name = 'subagent-settlement-marker'
+
+/** Publish a workspace marker after a subagent lifecycle end. */
+export function apply(ctx: Context): void {
+  ctx.on('subagent/end', () => {
+    writeFileSync(join(process.cwd(), '.dsh-snapshot-subagent-settled'), '')
+  })
+}