Document collaborative file safety acceptance

docs/editor/README.md

@@ -26,6 +26,7 @@ Docs for the in-process egui editor (`crates/editor/`). Update this index when a
 | [collaborative-file-safety.md](collaborative-file-safety.md) | Exact authored-file revisions, Git/read-only status, conflict recovery, and optional ownership providers |
 | [evaluations/material-renderer-foundation/](evaluations/material-renderer-foundation/) | Live screenshots and verification record for the renderer/material/component foundation |
 | [evaluations/material-library-targeted-drop/](evaluations/material-library-targeted-drop/) | Live screenshot and verification record for the docked Material Library and exact reversible surface drops |
+| [evaluations/collaborative-file-safety/](evaluations/collaborative-file-safety/) | Live screenshot and verification record for source-control status and guarded external-change recovery |
 | [evaluations/navigation-authoring/](evaluations/navigation-authoring/) | Live screenshots and verification record for navigation authoring and runtime parity |
 | [evaluations/production-readiness/](evaluations/production-readiness/) | Current #50 release-candidate matrix and required clean-checkout, soak, performance, limitation, and independent-signoff evidence |
 

docs/editor/collaborative-file-safety.md

@@ -56,3 +56,7 @@ empty provider registry performs no calls and adds no UI.
 
 The architectural policy is recorded in
 [ADR 0037](../adr/0037-collaborative-authored-file-safety.md).
+
+Live editor acceptance, including external-change detection, metadata comparison, cancel/reload
+invariants, and source-control status, is recorded in the
+[collaborative file-safety evaluation](evaluations/collaborative-file-safety/).

docs/editor/evaluations/collaborative-file-safety/README.md

@@ -0,0 +1,39 @@
+# Collaborative File Safety Evaluation
+
+Date: 2026-07-12
+Branch: `codex/collaboration-live-acceptance`
+Implementation commits: `5a82a9e`, `f2ad88f`
+
+This record captures live acceptance for source-control status and guarded authored-file writes.
+The permanent workflow and recovery contract live in the
+[collaborative file-safety guide](../../collaborative-file-safety.md).
+
+## Live Editor Evidence
+
+The image below is a native Wayland capture from the debug editor. A disposable untracked scene
+was loaded, changed locally, and then changed independently on disk before Save.
+
+![External-change guard showing loaded and current revision metadata while the dirty untracked scene remains open](external-change-metadata.png)
+
+The bottom status strip reports the active scene as `UNTRACKED`. The guarded save left the disk
+revision unchanged and opened recovery choices with the exact loaded/current revision, byte count,
+modified time, and permissions.
+
+## Acceptance Results
+
+| Area | Result | Evidence |
+|------|--------|----------|
+| Source-control status | Pass | Active disposable scene reported `UNTRACKED` without disrupting the editor workflow |
+| External-change guard | Pass | Save detected the changed disk revision and did not overwrite it |
+| Metadata comparison | Pass | Loaded/current revision, byte count, modified time, and permissions were displayed |
+| Cancel invariants | Pass | Cancel preserved the dirty local scene and made no filesystem change |
+| Invalid reload | Pass | Malformed external RON failed safely, kept the recovery dialog open, and reported the error |
+| Valid reload | Pass | Reload replaced the local draft, removed its duplicate actor, cleared dirty/history state, and adopted the disk revision |
+| Repository hygiene | Pass | Disposable scene and importer registry churn were removed after acceptance |
+| Packaged acceptance | Deferred | Explicitly deferred by project-owner direction; no packaged result is claimed here |
+
+## Automated Verification
+
+The implementation commits were already covered on integrated `main` by the workspace formatting,
+check, strict Clippy, test, level-validation, and navigation-artifact suites. This evidence-only
+change was additionally checked with `git diff --check`.