diff --git a/.github/workflows/windows-free-tests.yml b/.github/workflows/windows-free-tests.yml
index 8a17adbbf..d5ec9bb6e 100644
--- a/.github/workflows/windows-free-tests.yml
+++ b/.github/workflows/windows-free-tests.yml
@@ -23,6 +23,11 @@ name: Windows Free Tests
 on:
   pull_request:
     branches: [main]
+  # Also on main pushes, as free-tests.yml does: trains dispatch only the
+  # Linux free workflow, so without this no Windows run ever sees a train's
+  # combined tree or main after a merge.
+  push:
+    branches: [main]
   workflow_dispatch:
     inputs:
       record_durations:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9652e71fd..17d978c17 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Changelog
 
+## [Unreleased]
+
+**Windows free tests now also run on every push to main.** `windows-free-tests.yml` ran on pull requests and dispatch only: 194 PR runs, 6 dispatches and 0 pushes in its last 200 runs. Merge trains dispatch only `free-tests.yml` on the train branch. So no Windows run ever saw a train's combined tree or main after a merge, and a Windows break caused by two individually green PRs only surfaced on the next unrelated PR. Found while working on GSTA-68.
+
+### Fixed
+- **`.github/workflows/windows-free-tests.yml`**: adds `push: branches: [main]`, the same trigger free-tests.yml already has. The run uses the existing per-run concurrency group, and `record_durations` stays dispatch-only (on a push, `inputs.record_durations` is empty, so the lane runs and the recorder skips). Cost: about 40 job-minutes on GitHub's free `windows-latest` runners per merge.
+
+### Tests
+- `test/windows-native-workflows.test.ts` pins the new trigger set and requires the push trigger to be limited to main.
+
 ## [1.91.186.0] - 2026-10-24
 
 **Approving an autoplan run no longer fails one time in ten because its run id looks like a card number.** Today's daily flaky-fix pass found `test/capy-captain-flow.test.ts` failing once and passing on the serial retry in 7 of the 57 Free Tests runs from 2026-10-21 to 2026-10-23, one of them a push to main (39878113535). Every failure had the same assertion: `gstack-approvals import` refused the approval row with "field ask: pii.cc". The default autoplan run id is `run-YYYYMMDDHHMMSS`, the import writes it into the row's ask and source, and the credit-card rule saw those 14 digits as a card number whenever they passed the Luhn check, which a timestamp does about one time in ten. A real user's approval import failed the same way.
diff --git a/test/windows-native-workflows.test.ts b/test/windows-native-workflows.test.ts
index 013e89fed..04fd70868 100644
--- a/test/windows-native-workflows.test.ts
+++ b/test/windows-native-workflows.test.ts
@@ -23,7 +23,8 @@ const native = load('native-qualification.yml');
 const WINDOWS_CURATED_FLOOR = 638;
 
 test('the Windows lane plans, runs one strict shard per job and verifies every result', () => {
-  expect(Object.keys(windows.on).sort()).toEqual(['pull_request', 'workflow_call', 'workflow_dispatch']);
+  expect(Object.keys(windows.on).sort()).toEqual(['pull_request', 'push', 'workflow_call', 'workflow_dispatch']);
+  expect(windows.on.push).toEqual({ branches: ['main'] });
   expect(Object.keys(windows.on.workflow_dispatch.inputs)).toEqual(['record_durations']);
   expect(Object.keys(windows.on.workflow_call.inputs)).toEqual(['record_durations']);
   const plan = windows.jobs['windows-plan'];