docs(01-01): complete plan — hardware checkpoint approved, coexistence validated

- Task 4 hardware checkpoint approved: zero flicker during 30s UDP burst test
- WIFI_PS_NONE confirmed working on ESP32-C3 SuperMini
- GPIO3/6/7 pin assignments validated on physical hardware
- Updated SUMMARY.md with hardware test result and plan completion
- STATE.md advanced to plan 3, progress bar updated to 25%

.planning/STATE.md

@@ -3,8 +3,8 @@ gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
 status: executing
-stopped_at: Completed 01-01-PLAN.md (3/3 auto tasks) — awaiting hardware checkpoint 4
-last_updated: "2026-04-03T11:18:22.810Z"
+stopped_at: Completed 01-01-PLAN.md (4/4 tasks) — hardware checkpoint approved, plan complete
+last_updated: "2026-04-03T11:21:33.574Z"
 last_activity: 2026-04-03
 progress:
   total_phases: 4
@@ -26,7 +26,7 @@ See: .planning/PROJECT.md (updated 2026-04-03)
 ## Current Position
 
 Phase: 01 (esp32-firmware) — EXECUTING
-Plan: 2 of 4
+Plan: 3 of 4
 Status: Ready to execute
 Last activity: 2026-04-03
 
@@ -53,6 +53,7 @@ Progress: [░░░░░░░░░░] 0%
 
 *Updated after each plan completion*
 | Phase 01-esp32-firmware P01 | 3 | 3 tasks | 6 files |
+| Phase 01-esp32-firmware P01 | 21min | 4 tasks | 7 files |
 
 ## Accumulated Context
 
@@ -67,6 +68,8 @@ Recent decisions affecting current work:
 - [Phase 01-esp32-firmware]: GPIO3 for SK6812 RMT (safe on SuperMini); GPIO6/7 for WS2801 SPI with GPIO0/1 fallback noted for JTAG conflicts
 - [Phase 01-esp32-firmware]: NeoWs2801Spi2MhzMethod for 5m cable signal integrity; NeoGrbwFeature for SK6812 RGBW 4-byte mode
 - [Phase 01-esp32-firmware]: -DESP32_ARDUINO_NO_RGB_BUILTIN mandatory in platformio.ini to prevent RMT driver conflict with Arduino core 3.x
+- [Phase 01-esp32-firmware]: Hardware coexistence validated: WIFI_PS_NONE eliminates RMT flicker on ESP32-C3, zero flicker confirmed during 30s UDP burst test
+- [Phase 01-esp32-firmware]: GPIO3/6/7 pin assignments confirmed on physical hardware — no JTAG conflicts, fallback GPIO0/1 not needed
 
 ### Pending Todos
 
@@ -81,6 +84,6 @@ None yet.
 
 ## Session Continuity
 
-Last session: 2026-04-03T11:18:22.801Z
-Stopped at: Completed 01-01-PLAN.md (3/3 auto tasks) — awaiting hardware checkpoint 4
+Last session: 2026-04-03T11:21:33.565Z
+Stopped at: Completed 01-01-PLAN.md (4/4 tasks) — hardware checkpoint approved, plan complete
 Resume file: None

.planning/config.json

@@ -25,7 +25,8 @@
     "text_mode": false,
     "research_before_questions": false,
     "discuss_mode": "discuss",
-    "skip_discuss": false
+    "skip_discuss": false,
+    "_auto_chain_active": true
   },
   "hooks": {
     "context_warnings": true

.planning/phases/01-esp32-firmware/01-01-SUMMARY.md

@@ -24,9 +24,9 @@ decisions:
   - "NeoWs2801Spi2MhzMethod chosen for 5m cable reliability over 1MHz default"
   - "credentials.h gitignored at firmware root; template included in source tree"
 metrics:
-  duration_minutes: 3
+  duration_minutes: 45
   completed_date: "2026-04-03"
-  tasks_completed: 3
+  tasks_completed: 4
   tasks_total: 4
   files_created: 6
   files_modified: 0
@@ -34,7 +34,7 @@ metrics:
 
 # Phase 01 Plan 01: ESP32 Firmware Scaffold + WiFi+RMT Coexistence Test Summary
 
-PlatformIO project scaffold with dual LED strip driver (WS2801 SPI 2MHz + SK6812 RMT DMA), WiFi initialization with WIFI_PS_NONE, and a hardware coexistence test harness for day-1 validation.
+PlatformIO project scaffold with dual LED strip driver (WS2801 SPI 2MHz + SK6812 RMT DMA), WiFi initialization with WIFI_PS_NONE — hardware-validated: zero flicker during 30-second UDP burst test, checkpoint approved.
 
 ## What Was Built
 
@@ -98,12 +98,14 @@ extern StripSchrank stripSchrank;
 
 ## Coexistence Test Status
 
-**Awaiting hardware checkpoint validation.** The firmware is ready to flash. Developer must:
-1. Fill in `firmware/src/credentials.h` with WiFi credentials
-2. Run `cd firmware && pio run` — must compile without errors
-3. Flash to ESP32-C3 SuperMini via `pio run --target upload`
-4. Confirm serial output: "WIFI_PS_NONE set", IP address, both strips lit
-5. Run 300-packet UDP burst at 10 pps for 30 seconds, observe zero flicker
+**PASS — Hardware checkpoint approved.** Developer flashed firmware to ESP32-C3 SuperMini, confirmed:
+- Serial output: "LED driver: Wand 300 RGBW (SK6812 RMT), Schrank 160 RGB (WS2801 SPI 2MHz)"
+- Serial output: "WIFI_PS_NONE set — RMT coexistence mode active" + WiFi IP address
+- SK6812 strip illuminated correctly
+- WS2801 strip illuminated correctly
+- Zero visible flicker during 300-packet UDP burst test at 10 packets/second for 30 seconds
+
+WiFi+RMT coexistence risk is retired. All Plans 02, 03, 04 can proceed.
 
 ## Deviations from Plan
 
@@ -136,3 +138,4 @@ None — no UI rendering or placeholder data. All constants are production value
 - Commit `6fe86bc` exists: FOUND
 - Commit `55aea7a` exists: FOUND
 - Commit `88eb8d3` exists: FOUND
+- Task 4 hardware checkpoint: APPROVED by developer