Review story 1.2: config read/write/wipe passes all ACs

All 4 ACs verified, 7 tests pass, ruff clean. No issues found.
Story status updated to done; no new deferred items.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

_bmad-output/implementation-artifacts/1-2-configuration-read-write-wipe.md

@@ -1,6 +1,6 @@
 # Story 1.2: Configuration Read/Write/Wipe
 
-Status: review
+Status: done
 
 ## Story
 

_bmad-output/implementation-artifacts/deferred-work.md

@@ -15,3 +15,9 @@ Description: Unit files created at `systemd/`. Must be symlinked or copied to `/
 Story: `1-1-project-scaffold-and-verified-entry-points`
 Task: 9.1, 9.2
 Description: Entry points verified on host (Pi 5, Linux). Full AC1 verification on Pi Zero 2W hardware requires physical deployment.
+
+---
+
+## Story 1.2 review — no new deferred items
+
+Story `1-2-configuration-read-write-wipe` reviewed 2026-04-22. All 4 ACs pass, all 7 tests pass, ruff check and format clean. No deferred items required: `config.write()` already handles directory creation via `mkdir(parents=True, exist_ok=True)`, so deployment to a fresh device with no `/etc/planemapper/` directory is covered at runtime.

_bmad-output/implementation-artifacts/sprint-status.yaml

@@ -45,7 +45,7 @@ development_status:
   # Epic 1: Device Setup & Provisioning
   epic-1: in-progress
   1-1-project-scaffold-and-verified-entry-points: done
-  1-2-configuration-read-write-wipe: review
+  1-2-configuration-read-write-wipe: done
   1-3-wifi-hotspot-and-captive-portal-form: backlog
   1-4-location-resolution-icao-and-address: backlog
   1-5-provisioning-execution-tile-download-cache-validation-and-wifi-kill: backlog