diff --git a/.gitignore b/.gitignore
index 89cc49c..b33f54f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,8 @@
 .vscode/c_cpp_properties.json
 .vscode/launch.json
 .vscode/ipch
+build/
+sdkconfig
+sdkconfig.old
+managed_components/
+dependencies.lock
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..98fd06f
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,3 @@
+cmake_minimum_required(VERSION 3.16)
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(autofilm)
diff --git a/components/board_jc4827w543/CMakeLists.txt b/components/board_jc4827w543/CMakeLists.txt
new file mode 100644
index 0000000..cc73554
--- /dev/null
+++ b/components/board_jc4827w543/CMakeLists.txt
@@ -0,0 +1 @@
+idf_component_register(SRCS "board.c" INCLUDE_DIRS "include" REQUIRES driver)
diff --git a/components/board_jc4827w543/board.c b/components/board_jc4827w543/board.c
new file mode 100644
index 0000000..c536edf
--- /dev/null
+++ b/components/board_jc4827w543/board.c
@@ -0,0 +1,16 @@
+#include "board.h"
+
+const char *board_name(void)
+{
+    return "jc4827w543";
+}
+
+gpio_num_t board_pin_motor_en(void)
+{
+    return GPIO_NUM_NC;
+}
+
+int board_motor_en_disable_level(void)
+{
+    return 1;
+}
diff --git a/components/board_jc4827w543/include/board.h b/components/board_jc4827w543/include/board.h
new file mode 100644
index 0000000..ae9994c
--- /dev/null
+++ b/components/board_jc4827w543/include/board.h
@@ -0,0 +1,5 @@
+#pragma once
+#include "driver/gpio.h"
+const char *board_name(void);
+gpio_num_t board_pin_motor_en(void);
+int board_motor_en_disable_level(void);
diff --git a/components/board_wroom/CMakeLists.txt b/components/board_wroom/CMakeLists.txt
new file mode 100644
index 0000000..cc73554
--- /dev/null
+++ b/components/board_wroom/CMakeLists.txt
@@ -0,0 +1 @@
+idf_component_register(SRCS "board.c" INCLUDE_DIRS "include" REQUIRES driver)
diff --git a/components/board_wroom/board.c b/components/board_wroom/board.c
new file mode 100644
index 0000000..b5e712e
--- /dev/null
+++ b/components/board_wroom/board.c
@@ -0,0 +1,16 @@
+#include "board.h"
+
+const char *board_name(void)
+{
+    return "wroom";
+}
+
+gpio_num_t board_pin_motor_en(void)
+{
+    return (gpio_num_t)27;
+}
+
+int board_motor_en_disable_level(void)
+{
+    return 1;
+}
diff --git a/components/board_wroom/include/board.h b/components/board_wroom/include/board.h
new file mode 100644
index 0000000..ae9994c
--- /dev/null
+++ b/components/board_wroom/include/board.h
@@ -0,0 +1,5 @@
+#pragma once
+#include "driver/gpio.h"
+const char *board_name(void);
+gpio_num_t board_pin_motor_en(void);
+int board_motor_en_disable_level(void);
diff --git a/docs/megaplans/REFACTOR-MEGAPLAN.md b/docs/megaplans/REFACTOR-MEGAPLAN.md
index 42c308e..03751ca 100644
--- a/docs/megaplans/REFACTOR-MEGAPLAN.md
+++ b/docs/megaplans/REFACTOR-MEGAPLAN.md
@@ -33,7 +33,7 @@ If blocked: stop, commit nothing broken, write `BLOCKED:` at top of the phase fi
 | ID | File | Session goal | STATUS |
 | --- | --- | --- | --- |
 | P00 | `refactor/P00-docs-lock.md` | Architecture docs already on branch | DONE |
-| P01 | `refactor/P01-idf-skeleton.md` | Dual-board IDF project compiles | TODO |
+| P01 | `refactor/P01-idf-skeleton.md` | Dual-board IDF project compiles | BLOCKED |
 | P02 | `refactor/P02-ui-cmd-process.md` | `ui_cmd` + `app_process` + golden tests | TODO |
 | P03 | `refactor/P03-machine-host.md` | `app_machine` + stub HAL + SM tests | TODO |
 | P04 | `refactor/P04-gitea-ci.md` | `.gitea/workflows/ci.yml` live | TODO |
diff --git a/docs/megaplans/refactor/P01-idf-skeleton.md b/docs/megaplans/refactor/P01-idf-skeleton.md
index 2022820..4d5d344 100644
--- a/docs/megaplans/refactor/P01-idf-skeleton.md
+++ b/docs/megaplans/refactor/P01-idf-skeleton.md
@@ -1,6 +1,7 @@
 # P01 — IDF dual-board skeleton
 
-STATUS: TODO
+STATUS: BLOCKED
+BLOCKED: no IDF (IDF_PATH unset; no idf.py; no docker.io/espressif/idf:v5.4). Sources landed; builds not run; no binaries faked.
 DEPENDS: P00
 READ: `AGENTS.md`, `docs/megaplans/REFACTOR-MEGAPLAN.md`, this file
 OUT: recipes, UI, motor, Arduino-as-component, Gitea workflow, touching `src/` behaviour
diff --git a/main/CMakeLists.txt b/main/CMakeLists.txt
new file mode 100644
index 0000000..d4b69d0
--- /dev/null
+++ b/main/CMakeLists.txt
@@ -0,0 +1,11 @@
+if(NOT DEFINED AUTOFILM_BOARD)
+  set(AUTOFILM_BOARD wroom CACHE STRING "wroom|jc4827w543")
+endif()
+if(AUTOFILM_BOARD STREQUAL "wroom")
+  set(BOARD_COMP board_wroom)
+elseif(AUTOFILM_BOARD STREQUAL "jc4827w543")
+  set(BOARD_COMP board_jc4827w543)
+else()
+  message(FATAL_ERROR "AUTOFILM_BOARD=${AUTOFILM_BOARD}")
+endif()
+idf_component_register(SRCS "main.c" INCLUDE_DIRS "." REQUIRES ${BOARD_COMP} driver)
diff --git a/main/idf_component.yml b/main/idf_component.yml
new file mode 100644
index 0000000..c093387
--- /dev/null
+++ b/main/idf_component.yml
@@ -0,0 +1 @@
+dependencies: {}
diff --git a/main/main.c b/main/main.c
new file mode 100644
index 0000000..f88670e
--- /dev/null
+++ b/main/main.c
@@ -0,0 +1,28 @@
+#include "board.h"
+#include "esp_log.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+static const char *TAG = "app";
+
+void app_main(void)
+{
+    ESP_LOGI(TAG, "board=%s", board_name());
+
+    gpio_num_t en_pin = board_pin_motor_en();
+    if (en_pin != GPIO_NUM_NC) {
+        gpio_config_t io = {
+            .pin_bit_mask = 1ULL << en_pin,
+            .mode = GPIO_MODE_OUTPUT,
+            .pull_up_en = GPIO_PULLUP_DISABLE,
+            .pull_down_en = GPIO_PULLDOWN_DISABLE,
+            .intr_type = GPIO_INTR_DISABLE,
+        };
+        gpio_config(&io);
+        gpio_set_level(en_pin, board_motor_en_disable_level());
+    }
+
+    while (1) {
+        vTaskDelay(pdMS_TO_TICKS(1000));
+    }
+}
diff --git a/sdkconfig.defaults b/sdkconfig.defaults
new file mode 100644
index 0000000..2f7768b
--- /dev/null
+++ b/sdkconfig.defaults
@@ -0,0 +1,3 @@
+CONFIG_ESP_TASK_WDT_EN=y
+CONFIG_ESP_TASK_WDT_TIMEOUT_S=10
+CONFIG_ESP_TASK_WDT_CHECK_IDLE_TASK_CPU0=y
diff --git a/sdkconfig.s3 b/sdkconfig.s3
new file mode 100644
index 0000000..2f09bc0
--- /dev/null
+++ b/sdkconfig.s3
@@ -0,0 +1,4 @@
+CONFIG_IDF_TARGET="esp32s3"
+CONFIG_SPIRAM=y
+CONFIG_SPIRAM_MODE_OCT=y
+CONFIG_SPIRAM_SPEED_80M=y
diff --git a/sdkconfig.wroom b/sdkconfig.wroom
new file mode 100644
index 0000000..2a43df1
--- /dev/null
+++ b/sdkconfig.wroom
@@ -0,0 +1 @@
+CONFIG_IDF_TARGET="esp32"