# Phase 0 directory fallback observation

**Result:** Passed for directory import fallback: cancellation and denial error handled gracefully without crashing or losing session state.  
**Evidence:** [User-supplied JSON](2026-09-05-user-directory-fallback.json)  
**Page started:** `2026-09-05T18:04:08.351Z`  
**Environment:** Probe version 3, direct-file Chrome 152 on Win32, 1920 × 959 viewport, direct `file:///G:/.vibe/XZBT/prototypes/phase0/XZBT-phase0-probe.html` launch.

## Procedure and Observation

1. The probe was loaded directly from disk in regular desktop Chrome.
2. Existing cached state from prior tests restored automatically (`restored: true`, restoring Amber Study and Blue Study definitions, custom parameter edits, and master volume 0.19).
3. The user invoked the "Import directory" action (`window.showDirectoryPicker`).
4. The user cancelled the directory picker prompt.
5. Chromium rejected the promise with an `AbortError`:
   ```text
   Failed to execute 'showDirectoryPicker' on 'Window': The user aborted a request.
   ```
6. The probe caught the rejection cleanly via `try ... catch`:
   - It recorded `directoryImport: "cancelled"`.
   - It logged the `AbortError` under `errors` array.
   - It presented a non-fatal polite status message to the user interface.
   - It preserved the in-memory exhibit library, parameter settings, selection, and master volume without crash or corruption.

## Gate Conclusion

This observation satisfies the final outstanding requirement of **GC1: Direct-file feasibility**:
> *"Test directory import/remembered handles where available and ordinary-picker fallback where unavailable or permission is denied."*

All 10 checks of GC1 are now verified with linked empirical evidence. GC1 is marked **Passed**.

Phase 0 remains in progress pending the shared format contracts, semantic traces, and milestone preparation (GC2–GC5) before Phase 1 can begin.