Personal Playground: let a WordPress page request a site backup - #4304
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A page inside Personal Playground can already ask it to install a blueprint. It cannot ask for the thing people need far more often: a backup. Today the only way there is the Site Tools panel, so any guide that starts with "take your site elsewhere" has to open by describing where to click. Add a backup-site relay message beside install-blueprint. It runs the same useBackup() path as the Site Tools button, so dependent tabs still forward to the active tab and only one backup runs at a time. The reply carries 'started' as soon as the request is accepted, before the zip is built. Without it a caller cannot tell a slow backup apart from a Personal Playground that ignores the message, and has no moment at which to fall back to pointing at Site Tools. No confirmation dialog: the file only reaches the user's own disk, the requesting page never gets to read it, and a browser download is visible anyway. A dialog here would only reintroduce the click the message exists to remove. Claude-Session: https://claude.ai/code/session_015Wt1kT6weBQHE9oGvD4M8C
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No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configurationConfiguration used: defaults Review profile: CHILL Plan: Team Run ID: 📒 Files selected for processing (2)
Included review availability: Your plan provides up to 8 included reviews per hour; 2 remain after this review. 📝 WalkthroughWalkthroughThe personal WordPress playground now accepts ChangesBackup relay flow
Estimated code review effort: 3 (Moderate) | ~20 minutes Sequence Diagram(s)sequenceDiagram
participant WordPressPage
participant PlaygroundViewport
participant useBackup
WordPressPage->>PlaygroundViewport: Send backup-site request
PlaygroundViewport-->>WordPressPage: Send started result
PlaygroundViewport->>useBackup: Execute current backup callback
useBackup-->>PlaygroundViewport: Return backup result
PlaygroundViewport-->>WordPressPage: Send success or error result
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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CI caught the e2e test getting "Playground is not ready" back: WordPress renders behind the loading screen, so a page can post the message while the shell still has no client in state. Refusing there is wrong. The page doing the asking was served by this very site, so an unready-looking site is one whose state has not caught up, not one that cannot run a backup. Wait up to 15 seconds for it, and read performBackup off a ref so the wait uses the current one rather than the one captured when the listener was registered. The test now waits for the loading screen to go away first, so it starts from a booted site instead of racing the boot. Claude-Session: https://claude.ai/code/session_015Wt1kT6weBQHE9oGvD4M8C
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In `@packages/playground/personal-wp/playwright/e2e/relay-backup.spec.ts`:
- Around line 11-17: Co-locate the relay-backup test with the implementation
containing backupSiteFromRelay, moving relay-backup.spec.ts out of the
Playwright e2e directory. Update Playwright test discovery and all fixture
imports so the relocated test continues to run unchanged.
In
`@packages/playground/personal-wp/src/components/playground-viewport/index.tsx`:
- Line 1616: Update useBackup() to add a ref-backed operation lock that is
checked and acquired synchronously before the first await, preventing concurrent
backup executions even when relay requests arrive in the same turn. Release the
lock in a finally block so it is cleared on both success and failure, and add
coverage for two same-turn relay requests verifying that only one backup starts.
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packages/playground/personal-wp/README.mdpackages/playground/personal-wp/playwright/e2e/relay-backup.spec.tspackages/playground/personal-wp/src/components/playground-viewport/index.tsx
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isBackingUp and isRequestingRemote render the buttons, but they were also the guard against a second backup. Two calls in the same turn both read false and both start: two zips of the same site, two downloads, and a race over the backup history entry — which a page can now trigger by posting two backup-site messages. Guard the work with refs, set before the first await and cleared in finally, and leave the state to the UI. The new e2e test fails without this: both requests report success and two files download. Claude-Session: https://claude.ai/code/session_015Wt1kT6weBQHE9oGvD4M8C
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Motivation for the change, related issues
A page running inside Personal Playground can already ask it to install a blueprint (
install-blueprint). It cannot ask for the thing people need far more often: a backup.Today the only route is the Site Tools panel, so any guide that starts with "take this site somewhere else" has to open by describing where to click — which is exactly where readers fall off. The My Apps Make this a hosted WordPress guide begins that way (akirk/my-apps#147, WordPress/blueprints#236); with this message its first step becomes a button.
Implementation details
Adds a
backup-siterelay message besideinstall-blueprint, handled in the sameSeamlessViewportlistener and behind the same validation (relay shape, iframe tree, same origin).It runs the existing
useBackup()→performBackup()path — the one the Site Tools button uses — so dependent tabs keep forwarding to the active tab through the tab coordinator, and only one backup runs at a time.The reply is
backup-site-result:startedis sent as soon as the request is accepted, before the zip is built. Without it a caller cannot tell a slow backup apart from a Personal Playground that ignores the message, and so has no moment at which to fall back to pointing at Site Tools.No confirmation dialog, unlike blueprint installs. The file only reaches the user's own disk, the requesting page never gets to read it, and a browser download is visible anyway; a dialog would just reintroduce the click this message exists to remove. Noted in the README so it reads as a decision rather than an oversight.
Testing Instructions (or ideally a Blueprint)
New Playwright test,
packages/playground/personal-wp/playwright/e2e/relay-backup.spec.ts:It posts the message from inside the WordPress iframe and asserts the statuses arrive as
['started', 'success']and that a real download named<site>-backup-<date>-<time>.zipstarts. Passing locally, along with lint, typecheck and the 131 unit tests.By hand: open Personal Playground and run this in the WordPress frame's console —
A backup zip should download, and the two result messages arrive on
window.https://claude.ai/code/session_015Wt1kT6weBQHE9oGvD4M8C
Summary by CodeRabbit
New Features
Documentation
Tests