docs(changelog): merge queue stacked PRs via /trunk stack

changelog/2026-04-30-merge-queue-stacked-prs-trunk-stack.mdx

@@ -0,0 +1,19 @@
+---
+title: "Merge Queue: Move a Stack Through the Queue as One Unit with /trunk stack"
+description: "Comment /trunk stack on a chain of dependent pull requests and Trunk merges the whole stack through the queue together."
+date: 2026-04-30
+category: Merge Queue
+type: new-feature
+---
+
+**Comment `/trunk stack` on any PR in a dependent chain and Trunk merges the whole stack through the queue as a single unit.**
+
+A stack is a chain of PRs where each one's base is the PR below it. Instead of rebasing each PR onto main as the stack progresses or merging bottom-up by hand, `/trunk stack` combines the chain into one stacked PR that the queue tests and merges together. When that stacked PR merges, every member PR auto-closes since its code is already in the target branch.
+
+You can tell a stack apart in the dashboard at a glance:
+
+* A **Stacked** pill marks stacked PRs in the Queue and Graph views.
+* The merge item detail page header lists every member PR and its title.
+* Stack-specific cancellation reasons show up in the conclusion chart, so you can see exactly why a stack left the queue.
+
+[Read the docs](https://docs.trunk.io/merge-queue/using-the-queue/stacked-pull-requests) to learn more.

changelog/index.mdx

@@ -52,6 +52,12 @@ rss: true
 
 ### April 2026
 
+<Update label="April 30, 2026" tags={["Merge Queue"]}>
+  **[Merge Queue: Move a Stack Through the Queue as One Unit with /trunk stack](/changelog/2026-04-30-merge-queue-stacked-prs-trunk-stack)**
+
+  Comment `/trunk stack` on a chain of dependent pull requests and Trunk merges the whole stack through the queue together.
+</Update>
+
 <Update label="April 30, 2026" tags={["Merge Queue"]}>
   **[Merge Queue: Chrome Extension](/changelog/2026-04-30-merge-queue-chrome-extension)**
 

docs.json

@@ -622,6 +622,7 @@
               "changelog/2026-05-18-flaky-tests-failure-count-monitor",
               "changelog/2026-05-18-flaky-tests-monitor-label-actions",
               "changelog/2026-05-18-flaky-tests-test-labels",
+              "changelog/2026-04-30-merge-queue-stacked-prs-trunk-stack",
               "changelog/2026-04-30-merge-queue-chrome-extension",
               "changelog/2026-04-21-merge-queue-drill-down-into-merge-metrics",
               "changelog/2026-04-13-merge-queue-terraform-provider",

merge-queue/changelog.mdx

@@ -22,6 +22,12 @@ rss: true
 
 ### April 2026
 
+<Update label="April 30, 2026" tags={["Merge Queue"]}>
+  **[Merge Queue: Move a Stack Through the Queue as One Unit with /trunk stack](/changelog/2026-04-30-merge-queue-stacked-prs-trunk-stack)**
+
+  Comment `/trunk stack` on a chain of dependent pull requests and Trunk merges the whole stack through the queue together.
+</Update>
+
 <Update label="April 30, 2026" tags={["Merge Queue"]}>
   **[Merge Queue: Chrome Extension](/changelog/2026-04-30-merge-queue-chrome-extension)**