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+(* Boot - Arvo Kernel Boot System
+ *
+ * This module handles:
+ * - Loading pill files (jammed Arvo kernels)
+ * - Parsing pill structure
+ * - Initial boot sequence
+ *
+ * Pill Structure:
+ * - A pill is a jammed noun containing the Arvo kernel
+ * - Format varies, but typically: [kernel-gate initial-state]
+ * - Or just the kernel-gate itself
+ *)
+
+(* Boot error *)
+type error =
+  | FileNotFound of string
+  | InvalidPill of string
+  | BootFailed of string
+
+(* Pill type *)
+type pill = {
+  kernel: Noun.noun;        (* The Arvo kernel gate *)
+  boot_ova: Noun.noun list; (* Initial events to process *)
+}
+
+(* Load pill from file using Eio
+ *
+ * Steps:
+ * 1. Read jammed pill file
+ * 2. Cue to get kernel noun
+ * 3. Parse pill structure
+ *)
+let load_pill ~fs pill_path =
+  try
+    Printf.printf "[Boot] Loading pill from %s...\n%!" pill_path;
+
+    (* Read pill file *)
+    let file_path = Eio.Path.(fs / pill_path) in
+    let pill_bytes = Eio.Path.load file_path |> Bytes.of_string in
+
+    Printf.printf "[Boot] Pill file: %d bytes\n%!" (Bytes.length pill_bytes);
+
+    (* Cue the pill to get kernel noun *)
+    let kernel_noun = Serial.cue pill_bytes in
+
+    Printf.printf "[Boot] Pill cued successfully\n%!";
+
+    (* For now, treat the entire pill as the kernel
+     * In a real implementation, we'd parse the structure:
+     *   - Check if it's a cell with [kernel boot-events]
+     *   - Or just a single kernel gate
+     *)
+    Ok {
+      kernel = kernel_noun;
+      boot_ova = [];  (* No boot events for now *)
+    }
+
+  with
+  | Sys_error msg ->
+      Error (FileNotFound msg)
+  | e ->
+      Error (InvalidPill (Printexc.to_string e))
+
+(* Create a minimal fake pill for testing
+ *
+ * This creates a trivial kernel that's just an atom.
+ * In reality, the kernel is a huge compiled gate, but for
+ * testing we can use this simple version.
+ *)
+let fake_pill () = {
+  kernel = Noun.atom 0;  (* Minimal kernel - just 0 *)
+  boot_ova = [];
+}
+
+(* Boot Arvo from a pill
+ *
+ * Steps:
+ * 1. Set kernel state to pill's kernel
+ * 2. Process boot events if any
+ * 3. Initialize event counter to 0
+ *)
+let boot_from_pill state pill =
+  Printf.printf "[Boot] Initializing Arvo kernel...\n%!";
+
+  (* Set kernel state *)
+  State.boot state pill.kernel;
+
+  (* Process boot events if any *)
+  List.iteri (fun i _ovum ->
+    Printf.printf "[Boot] Processing boot event %d\n%!" i;
+    (* In real implementation: State.poke state ovum *)
+  ) pill.boot_ova;
+
+  Printf.printf "[Boot] ✓ Arvo kernel booted!\n%!";
+  Ok ()
+
+(* Boot from pill file - convenience function *)
+let boot_from_file ~fs state pill_path =
+  match load_pill ~fs pill_path with
+  | Error err ->
+      let msg = match err with
+        | FileNotFound s -> "File not found: " ^ s
+        | InvalidPill s -> "Invalid pill: " ^ s
+        | BootFailed s -> "Boot failed: " ^ s
+      in
+      Printf.printf "[Boot] Error: %s\n%!" msg;
+      Error msg
+
+  | Ok pill ->
+      boot_from_pill state pill
+
+(* Create minimal boot for testing (no pill file needed) *)
+let boot_fake state =
+  Printf.printf "[Boot] Creating fake minimal kernel...\n%!";
+  let pill = fake_pill () in
+  boot_from_pill state pill