MWPW-203849: POC: Add concurrent editing presence banner to Studio fragment editors - #1178
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MWPW-203849: POC: Add concurrent editing presence banner to Studio fragment editors#1178seanchoi0 wants to merge 1 commit into
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…t editors Shows a warning banner when multiple authors are editing the same fragment simultaneously. Uses a WebSocket connection to a Cloudflare Workers Durable Object that broadcasts presence updates per fragment ID. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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SNOW Change Request Transaction ID [STUDIO]: 0000019c1eec85a3-1f56e52a |
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SNOW Change Request Transaction ID [IO]: 0000019c1eec85a3-1f56e594 |
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August 25, 2026 14:36
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Shows a yellow warning banner when multiple authors are editing the same fragment at the same time. The banner disappears automatically when the other editor closes the fragment.
Resolves https://jira.corp.adobe.com/browse/MWPW-203849
QA Checklist: https://wiki.corp.adobe.com/display/adobedotcom/M@S+Engineering+QA+Use+Cases
Implementation
New
ConcurrentEditController(Lit ReactiveController) instudio/src/reactivity/concurrent-edit-controller.jsmanages WebSocket lifecycle to a Cloudflare Workers Durable Object (wss://mas-presence.mas-presence.workers.dev)Added to both
editor-panel.js(Collections side panel) andmas-fragment-editor.js(Card full-page editor)WebSocket connects per fragment ID on edit open, disconnects on close
Banner shows when 2+ connections are active on the same fragment; hides when count drops to 1
Deduplicates by email to handle same user with multiple tabs
C1. Cover code with Unit Tests
C2. Add a Nala test (double check with #fishbags if nala test is needed)
C3. Verify all Checks are green (unit tests, nala tests)
C4. PR description contains working Test Page link where the feature can be tested
C5: you are ready to do a demo from Test Page in PR (bonus: write a working demo script that you'll use on Thursday, you can eventually put in your PR)
C.6 read your Jira one more time to validate that you've addressed all AC's and nothing is missing
Test URLs: