From the 2026-10-07 site-builder research (competitor review, user sentiment, code audit, Fable prioritization). Roadmap: https://claude.ai/artifact/QpQcSCk21z6SN7LPSm8tKE · id two-tab-conflict-guard
**Tier:** Fix first · **Order:** 4 of 35 · **Effort:** S · **Impact:** med
## What
If the site was saved from another tab since you opened it, the editor says so and offers Reload or Overwrite instead of silently clobbering.
## Why
Audit: last writer wins. Owner + staff, or phone + desktop editing, is realistic for small businesses.
## Today
No revision stamp anywhere.
## Design notes
Backend stamps a rev into project.json and returns it; save sends base_rev; mismatch returns 409. No locking or websockets.
## Depends on
- #29 Rotating server-side backups on every save
---
From the 2026-10-07 site-builder research (competitor review, user sentiment, code audit, Fable prioritization). Roadmap: https://claude.ai/artifact/QpQcSCk21z6SN7LPSm8tKE · id `two-tab-conflict-guard`
Shipped in WHP release 2026.10.3 (site-builder mainbdb4789, deployed fleet-wide 2026-10-07). Implemented, reviewed and verified as part of the editor-polish batch.
Shipped in WHP release **2026.10.3** (site-builder `main` bdb4789, deployed fleet-wide 2026-10-07). Implemented, reviewed and verified as part of the editor-polish batch.
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Tier: Fix first · Order: 4 of 35 · Effort: S · Impact: med
What
If the site was saved from another tab since you opened it, the editor says so and offers Reload or Overwrite instead of silently clobbering.
Why
Audit: last writer wins. Owner + staff, or phone + desktop editing, is realistic for small businesses.
Today
No revision stamp anywhere.
Design notes
Backend stamps a rev into project.json and returns it; save sends base_rev; mismatch returns 409. No locking or websockets.
Depends on
From the 2026-10-07 site-builder research (competitor review, user sentiment, code audit, Fable prioritization). Roadmap: https://claude.ai/artifact/QpQcSCk21z6SN7LPSm8tKE · id
two-tab-conflict-guardShipped in WHP release 2026.10.3 (site-builder
mainbdb4789, deployed fleet-wide 2026-10-07). Implemented, reviewed and verified as part of the editor-polish batch.