Course update: lessons, CTF 0x0011a_cb, and documentation

- 0x0011a_cb (Operation Dark Vector): nation-state CTF redesign with an
  AES-128-ECB sealed target and a plaintext launch origin; RP2350 firmware with
  bearing-driven servo, tri-color LEDs, GSV stats, and a realistic no-fix path
- docs: story-driven classified brief, GDB and Ghidra tutorials with deep
  step-throughs, regenerated artifacts and PDFs
- scripts: docstring standard, AES per-student randomizer, telemetry monitor
- week 3 to week 5 lessons: Ghidra patching tutorial, CMSIS-SVD hardware RE,
  double floating-point and GPIO architecture chapters, README structure

0x0001b_ctf/src/console.c

@@ -0,0 +1,50 @@
+// MIT License
+//
+// Copyright (c) 2026 Kevin Thomas
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+// Author:  Kevin Thomas
+// Email:   kevin@mytechnotalent.com
+// GitHub:  https://github.com/mytechnotalent
+// File:    console.c
+// Desc:    Implements the UART console banner and status reporting logic for
+//          Operation Black Start.
+// Created: 2026
+
+#include "console.h"
+#include "grid.h"
+#include <stdio.h>
+
+void print_boot_banner(void)
+{
+    printf("GLOBAL EMBEDDED RESPONSE NETWORK\r\n");
+    printf("BLACK START WINDOW: 27 MINUTES\r\n");
+    printf("UART0 115200 8N1 | AUTHORIZED LAB CONSOLE\r\n");
+    printf("SIGNAL: NORMAL\r\n");
+    printf("RESPONSE> ");
+}
+
+void print_status(void)
+{
+    printf("GRID STATUS: %s\r\n", operator_state ? "STABLE" : "CRITICAL");
+    printf("DISPATCH PATH: %s\r\n", dispatch_state ? "AUTHORIZED" : "HELD");
+    printf("LAST FRAME: QUARANTINED\r\n");
+    printf("RESPONSE> ");
+}

0x0001b_ctf/src/grid.c

@@ -0,0 +1,57 @@
+// MIT License
+//
+// Copyright (c) 2026 Kevin Thomas
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+// Author:  Kevin Thomas
+// Email:   kevin@mytechnotalent.com
+// GitHub:  https://github.com/mytechnotalent
+// File:    grid.c
+// Desc:    Implements the grid telemetry and safety evaluation logic for
+//          Operation Black Start.
+// Created: 2026
+
+#include "grid.h"
+#include <stdint.h>
+
+// Frozen grid frequency deviation reading latched when comms were severed.
+volatile uint32_t grid_deviation = 87;
+
+// Operator-facing classification of the frozen reading (drives GRID STATUS).
+volatile uint32_t operator_state = 0;
+
+// Automated dispatch authorization decision (drives DISPATCH PATH).
+volatile uint32_t dispatch_state = 0;
+
+// Quarantined black-start authorization frame, retained in flash, never sent.
+static volatile const char dispatch_frame[] =
+    "WORLDGRID:BLACKSTART:GRID-7:WATER-3";
+
+void retain_dispatch_frame(void)
+{
+    volatile char frame_marker = dispatch_frame[0];
+    (void)frame_marker;
+}
+
+void evaluate_grid(void)
+{
+    operator_state = (grid_deviation < SAFE_THRESHOLD) ? 1 : 0;
+    dispatch_state = (grid_deviation < SAFE_THRESHOLD) ? 1 : 0;
+}

0x0001b_ctf/src/main.c

@@ -0,0 +1,56 @@
+// MIT License
+//
+// Copyright (c) 2026 Kevin Thomas
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+// Author:  Kevin Thomas
+// Email:   kevin@mytechnotalent.com
+// GitHub:  https://github.com/mytechnotalent
+// File:    main.c
+// Desc:    Main entry point for the Operation Black Start CTF relay firmware.
+// Created: 2026
+
+#include "console.h"
+#include "grid.h"
+#include "pico/stdlib.h"
+
+/**
+ * @brief Run the recurring UART evidence stream for the isolated CTF image.
+ *
+ * Initializes the standard I/O subsystems, anchors the quarantined dispatch
+ * frame in flash memory, evaluates the frozen telemetry against the compiled
+ * safety threshold, prints the startup banner, and repeatedly emits the
+ * system status report every second.
+ *
+ * @param None.
+ * @return int Standard exit code (never reached in normal firmware execution).
+ */
+int main(void)
+{
+    stdio_init_all();
+    retain_dispatch_frame();
+    evaluate_grid();
+    print_boot_banner();
+    while (true) {
+        print_status();
+        sleep_ms(1000);
+    }
+    return 0;
+}