Complete Swift firmware patcher parity and CLI wiring

Run SwiftFormat on firmware patcher

Remove legacy Python firmware patchers

Fix compare pipeline pyimg4 PATH handling

Restore Python patchers and prefer fresh restore

Update BinaryBuffer.swift

Avoid double scanning in patcher apply

Prefer Python TXM site before fallback

Retarget TXM trustcache finder for 26.1

Remove legacy Python firmware patchers

Fail fast on nested virtualization hosts

Return nonzero on fatal boot startup

Add amfidont helper for signed boot binary

Stage AMFI boot args for next host reboot

Add host preflight for boot entitlements

Fail fast when boot entitlements are unavailable

Switch firmware patch targets to Swift CLI

Record real Swift firmware parity results

Verify Swift firmware pipeline end-to-end parity

Fix Swift firmware pipeline JB dry-run

README.md

@@ -70,6 +70,15 @@ Boot into Recovery (long press power button), open Terminal, then choose one set
   sudo amfidont --path [PATH_TO_VPHONE_DIR]
   ```
 
+  Repo helper:
+
+  ```bash
+  make amfidont_allow_vphone
+  ```
+
+  This helper computes the current signed `vphone-cli` CDHash and uses the
+  URL-encoded project path form observed by `AMFIPathValidator`.
+
 **Install dependencies:**
 
 ```bash
@@ -225,6 +234,17 @@ AMFI/debug restrictions are not bypassed correctly. Choose one setup path:
 
 - **Option 2 (debug restrictions only):**
   use Recovery mode `csrutil enable --without debug` (no full SIP disable), then install/load [`amfidont`](https://github.com/zqxwce/amfidont) while keeping AMFI otherwise enabled.
+  For this repo, `make amfidont_allow_vphone` packages the required encoded-path
+  and CDHash allowlist startup.
+
+**Q: `make boot` / `make boot_dfu` starts and then fails with `VZErrorDomain Code=2 "Virtualization is not available on this hardware."`**
+
+The host itself is running inside an Apple virtual machine, so nested
+Virtualization.framework guest boot is unavailable. Run the boot flow on a
+non-nested macOS 15+ host instead. `make boot_host_preflight` will show this as
+`Model Name: Apple Virtual Machine 1` with `kern.hv_vmm_present=1`.
+`make boot` / `make boot_dfu` now fail fast through `boot_binary_check` before
+attempting VM startup on that kind of host.
 
 **Q: System apps (App Store, Messages, etc.) won't download or install.**