# Patch Comparison: Regular / Development / Jailbreak

## Boot Chain Patches

### AVPBooter

| #   | Patch        | Purpose                          | Regular | Dev | JB  |
| --- | ------------ | -------------------------------- | :-----: | :-: | :-: |
| 1   | `mov x0, #0` | DGST signature validation bypass |    Y    |  Y  |  Y  |

### iBSS

| #   | Patch                               | Purpose                                                       | Regular | Dev | JB  |
| --- | ----------------------------------- | ------------------------------------------------------------- | :-----: | :-: | :-: |
| 1   | Serial labels (2x)                  | "Loaded iBSS" in serial log                                   |    Y    |  Y  |  Y  |
| 2   | `image4_validate_property_callback` | Signature bypass (`b.ne` -> NOP, `mov x0,x22` -> `mov x0,#0`) |    Y    |  Y  |  Y  |
| 3   | Skip `generate_nonce`               | Keep apnonce stable for SHSH (`tbz` -> unconditional `b`)     |    -    |  -  |  Y  |

### iBEC

| #   | Patch                               | Purpose                                    | Regular | Dev | JB  |
| --- | ----------------------------------- | ------------------------------------------ | :-----: | :-: | :-: |
| 1   | Serial labels (2x)                  | "Loaded iBEC" in serial log                |    Y    |  Y  |  Y  |
| 2   | `image4_validate_property_callback` | Signature bypass                           |    Y    |  Y  |  Y  |
| 3   | Boot-args redirect                  | ADRP+ADD -> `serial=3 -v debug=0x2014e %s` |    Y    |  Y  |  Y  |

### LLB

| #   | Patch                               | Purpose                                    | Regular | Dev | JB  |
| --- | ----------------------------------- | ------------------------------------------ | :-----: | :-: | :-: |
| 1   | Serial labels (2x)                  | "Loaded LLB" in serial log                 |    Y    |  Y  |  Y  |
| 2   | `image4_validate_property_callback` | Signature bypass                           |    Y    |  Y  |  Y  |
| 3   | Boot-args redirect                  | ADRP+ADD -> `serial=3 -v debug=0x2014e %s` |    Y    |  Y  |  Y  |
| 4   | Rootfs bypass (5 patches)           | Allow edited rootfs loading                |    Y    |  Y  |  Y  |
| 5   | Panic bypass                        | NOP `cbnz` after `mov w8,#0x328` check     |    Y    |  Y  |  Y  |

### TXM

| #   | Patch                                             | Purpose                                   | Regular | Dev | JB  |
| --- | ------------------------------------------------- | ----------------------------------------- | :-----: | :-: | :-: |
| 1   | Trustcache binary-search bypass                   | `bl hash_cmp` -> `mov x0, #0`             |    Y    |  Y  |  Y  |
| 2   | Selector24 bypass: `mov w0, #0xa1`                | Return PASS (byte 1 = 0) after prologue   |    -    |  Y  |  Y  |
| 3   | Selector24 bypass: `b <epilogue>`                 | Skip validation, jump to register restore |    -    |  Y  |  Y  |
| 4   | get-task-allow (selector 41\|29)                  | `bl` -> `mov x0, #1`                      |    -    |  Y  |  Y  |
| 5   | Selector42\|29 shellcode: branch to cave          | Redirect dispatch stub to shellcode       |    -    |  Y  |  Y  |
| 6   | Selector42\|29 shellcode: NOP pad                 | UDF -> NOP in code cave                   |    -    |  Y  |  Y  |
| 7   | Selector42\|29 shellcode: `mov x0, #1`            | Set return value to true                  |    -    |  Y  |  Y  |
| 8   | Selector42\|29 shellcode: `strb w0, [x20, #0x30]` | Set manifest flag                         |    -    |  Y  |  Y  |
| 9   | Selector42\|29 shellcode: `mov x0, x20`           | Restore context pointer                   |    -    |  Y  |  Y  |
| 10  | Selector42\|29 shellcode: branch back             | Return from shellcode to stub+4           |    -    |  Y  |  Y  |
| 11  | Debugger entitlement (selector 42\|37)            | `bl` -> `mov w0, #1`                      |    -    |  Y  |  Y  |
| 12  | Developer mode bypass                             | NOP conditional guard before deny path    |    -    |  Y  |  Y  |

## Kernelcache

### Base Patches (All Variants)

| #     | Patch                      | Function                         | Purpose                                            | Regular | Dev | JB  |
| ----- | -------------------------- | -------------------------------- | -------------------------------------------------- | :-----: | :-: | :-: |
| 1     | NOP `tbnz w8,#5`           | `_apfs_vfsop_mount`              | Skip root snapshot sealed-volume check             |    Y    |  Y  |  Y  |
| 2     | NOP conditional            | `_authapfs_seal_is_broken`       | Skip root volume seal panic                        |    Y    |  Y  |  Y  |
| 3     | NOP conditional            | `_bsd_init`                      | Skip rootvp not-authenticated panic                |    Y    |  Y  |  Y  |
| 4-5   | `mov w0,#0; ret`           | `_proc_check_launch_constraints` | Bypass launch constraints                          |    Y    |  Y  |  Y  |
| 6-7   | `mov x0,#1` (2x)           | `PE_i_can_has_debugger`          | Enable kernel debugger                             |    Y    |  Y  |  Y  |
| 8     | NOP                        | `_postValidation`                | Skip AMFI post-validation                          |    Y    |  Y  |  Y  |
| 9     | `cmp w0,w0`                | `_postValidation`                | Force comparison true                              |    Y    |  Y  |  Y  |
| 10-11 | `mov w0,#1` (2x)           | `_check_dyld_policy_internal`    | Allow dyld loading                                 |    Y    |  Y  |  Y  |
| 12    | `mov w0,#0`                | `_apfs_graft`                    | Allow APFS graft                                   |    Y    |  Y  |  Y  |
| 13    | `cmp x0,x0`                | `_apfs_vfsop_mount`              | Skip mount check                                   |    Y    |  Y  |  Y  |
| 14    | `mov w0,#0`                | `_apfs_mount_upgrade_checks`     | Allow mount upgrade                                |    Y    |  Y  |  Y  |
| 15    | `mov w0,#0`                | `_handle_fsioc_graft`            | Allow fsioc graft                                  |    Y    |  Y  |  Y  |
| 16    | NOP (3x)                   | `handle_get_dev_by_role`         | Bypass APFS role-lookup deny gates for boot mounts |    Y    |  Y  |  Y  |
| 17-26 | `mov x0,#0; ret` (5 hooks) | Sandbox MACF ops table           | Stub 5 sandbox hooks                               |    Y    |  Y  |  Y  |

### JB-Only Kernel Methods (Reference List)

| #     | Group | Method                                | Function                                                                                             | Purpose                                                                                                                                                                              | JB Enabled |
| ----- | ----- | ------------------------------------- | ---------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | :--------: |
| JB-01 | A     | `patch_amfi_cdhash_in_trustcache`     | `AMFIIsCDHashInTrustCache`                                                                           | Always return true + store hash                                                                                                                                                      |     Y      |
| JB-02 | A     | `patch_amfi_execve_kill_path`         | AMFI execve kill return site                                                                         | Convert shared kill return from deny to allow (superseded by C21; standalone only)                                                                                                   |     N      |
| JB-03 | C     | `patch_cred_label_update_execve`      | `_cred_label_update_execve`                                                                          | Reworked C21-v3: C21-v1 already boots; v3 keeps split late exits and additionally ORs success-only helper bits `0xC` after clearing `0x3F00`; still disabled pending boot validation |     N      |
| JB-04 | C     | `patch_hook_cred_label_update_execve` | sandbox `mpo_cred_label_update_execve` wrapper (`ops[18]` -> `sub_FFFFFE00093BDB64`)                 | Faithful upstream C23 trampoline: copy `VSUID`/`VSGID` owner state into pending cred, set `P_SUGID`, then branch back to wrapper                                                     |     Y      |
| JB-05 | C     | `patch_kcall10`                       | `sysent[439]` (`SYS_kas_info` replacement)                                                           | Rebuilt ABI-correct kcall cave: `target + 7 args -> uint64 x0`; re-enabled after focused dry-run validation                                                                          |     Y      |
| JB-06 | B     | `patch_post_validation_additional`    | `_postValidation` (additional)                                                                       | Disable SHA256-only hash-type reject                                                                                                                                                 |     Y      |
| JB-07 | C     | `patch_syscallmask_apply_to_proc`     | syscallmask apply wrapper (`_proc_apply_syscall_masks` path)                                         | Faithful upstream C22: mutate installed Unix/Mach/KOBJ masks to all-ones via structural cave, then continue into setter; distinct from `NULL`-mask alternative                       |     Y      |
| JB-08 | A     | `patch_task_conversion_eval_internal` | `_task_conversion_eval_internal`                                                                     | Allow task conversion                                                                                                                                                                |     Y      |
| JB-09 | A     | `patch_sandbox_hooks_extended`        | Sandbox MACF ops (extended)                                                                          | Stub remaining 30+ sandbox hooks (incl. IOKit 201..210)                                                                                                                              |     Y      |
| JB-10 | A     | `patch_iouc_failed_macf`              | IOUC MACF shared gate                                                                                | A5-v2: patch only the post-`mac_iokit_check_open` deny gate (`CBZ W0, allow` -> `B allow`) and keep the rest of the IOUserClient open path intact                                    |     Y      |
| JB-11 | B     | `patch_proc_security_policy`          | `_proc_security_policy`                                                                              | Bypass security policy                                                                                                                                                               |     Y      |
| JB-12 | B     | `patch_proc_pidinfo`                  | `_proc_pidinfo`                                                                                      | Allow pid 0 info                                                                                                                                                                     |     Y      |
| JB-13 | B     | `patch_convert_port_to_map`           | `_convert_port_to_map_with_flavor`                                                                   | Skip kernel map panic                                                                                                                                                                |     Y      |
| JB-14 | B     | `patch_bsd_init_auth`                 | `_bsd_init` rootauth-failure branch                                                                  | Ignore `FSIOC_KERNEL_ROOTAUTH` failure in `bsd_init`; same gate as base patch #3 when layered                                                                                        |     Y      |
| JB-15 | B     | `patch_dounmount`                     | `_dounmount`                                                                                         | Allow unmount via upstream coveredvp cleanup-call NOP                                                                                                                                |     Y      |
| JB-16 | B     | `patch_io_secure_bsd_root`            | `AppleARMPE::callPlatformFunction` (`"SecureRootName"` return select), called from `IOSecureBSDRoot` | Force `"SecureRootName"` policy return to success without altering callback flow; implementation retargeted 2026-03-06                                                               |     Y      |
| JB-17 | B     | `patch_load_dylinker`                 | `_load_dylinker`                                                                                     | Skip strict `LC_LOAD_DYLINKER == "/usr/lib/dyld"` gate                                                                                                                               |     Y      |
| JB-18 | B     | `patch_mac_mount`                     | `___mac_mount`                                                                                       | Upstream mount-role wrapper bypass (`tbnz` NOP + role-byte zeroing)                                                                                                                  |     Y      |
| JB-19 | B     | `patch_nvram_verify_permission`       | `_verifyPermission` (NVRAM)                                                                          | Allow NVRAM writes                                                                                                                                                                   |     Y      |
| JB-20 | B     | `patch_shared_region_map`             | `_shared_region_map_and_slide_setup`                                                                 | Force root-vs-process-root mount compare to succeed before Cryptex fallback                                                                                                          |     Y      |
| JB-21 | B     | `patch_spawn_validate_persona`        | `_spawn_validate_persona`                                                                            | Upstream dual-`cbz` persona helper bypass                                                                                                                                            |     Y      |
| JB-22 | B     | `patch_task_for_pid`                  | `_task_for_pid`                                                                                      | Allow task_for_pid via upstream early `pid == 0` gate NOP                                                                                                                            |     Y      |
| JB-23 | B     | `patch_thid_should_crash`             | `_thid_should_crash`                                                                                 | Prevent GUARD_TYPE_MACH_PORT crash                                                                                                                                                   |     Y      |
| JB-24 | B     | `patch_vm_fault_enter_prepare`        | `_vm_fault_enter_prepare`                                                                            | Force `cs_bypass` fast path in runtime fault validation                                                                                                                              |     Y      |
| JB-25 | B     | `patch_vm_map_protect`                | `_vm_map_protect`                                                                                    | Skip upstream write-downgrade gate in `vm_map_protect`                                                                                                                               |     Y      |

## CFW Installation Patches

### Binary Patches Applied Over SSH Ramdisk

| #   | Patch                     | Binary                 | Purpose                                                       | Regular | Dev | JB  |
| --- | ------------------------- | ---------------------- | ------------------------------------------------------------- | :-----: | :-: | :-: |
| 1   | `/%s.gl` -> `/AA.gl`      | `seputil`              | Gigalocker UUID fix                                           |    Y    |  Y  |  Y  |
| 2   | NOP cache validation      | `launchd_cache_loader` | Allow modified `launchd.plist`                                |    Y    |  Y  |  Y  |
| 3   | `mov x0,#1; ret`          | `mobileactivationd`    | Activation bypass                                             |    Y    |  Y  |  Y  |
| 4   | Plist injection           | `launchd.plist`        | bash/dropbear/trollvnc/vphoned daemons                        |    Y    |  Y  |  Y  |
| 5   | `b` (skip jetsam guard)   | `launchd`              | Prevent jetsam panic on boot                                  |    -    |  Y  |  Y  |
| 6   | `LC_LOAD_DYLIB` injection | `launchd`              | Load short alias `/b` (copy of `launchdhook.dylib`) at launch |    -    |  -  |  Y  |

### Installed Components

| #   | Component                  | Description                                                                                                        | Regular | Dev | JB  |
| --- | -------------------------- | ------------------------------------------------------------------------------------------------------------------ | :-----: | :-: | :-: |
| 1   | Cryptex SystemOS + AppOS   | Decrypt AEA + mount + copy to device                                                                               |    Y    |  Y  |  Y  |
| 2   | GPU driver                 | AppleParavirtGPUMetalIOGPUFamily bundle                                                                            |    Y    |  Y  |  Y  |
| 3   | `iosbinpack64`             | Jailbreak tools (base set)                                                                                         |    Y    |  Y  |  Y  |
| 4   | `iosbinpack64` dev overlay | Replace `rpcserver_ios` with dev build                                                                             |    -    |  Y  |  -  |
| 5   | `vphoned`                  | vsock HID/control daemon (built + signed)                                                                          |    Y    |  Y  |  Y  |
| 6   | LaunchDaemons              | bash/dropbear/trollvnc/rpcserver_ios/vphoned plists                                                                |    Y    |  Y  |  Y  |
| 7   | Procursus bootstrap        | Bootstrap filesystem + optional Sileo deb                                                                          |    -    |  -  |  Y  |
| 8   | BaseBin hooks              | `systemhook.dylib` / `launchdhook.dylib` / `libellekit.dylib` -> `/cores/` plus `/b` alias for `launchdhook.dylib` |    -    |  -  |  Y  |
| 9   | `TweakLoader.dylib`        | Lean user-tweak loader built from source and installed to `/var/jb/usr/lib/TweakLoader.dylib`                      |    -    |  -  |  Y  |

### CFW Installer Flow Matrix (Script-Level)

| Flow Item                                     | Regular (`cfw_install.sh`)      | Dev (`cfw_install_dev.sh`) | JB (`cfw_install_jb.sh`)                      |
| --------------------------------------------- | ------------------------------- | -------------------------- | --------------------------------------------- |
| Base CFW phases (1/7 -> 7/7)                  | Runs directly                   | Runs directly              | Runs via `CFW_SKIP_HALT=1 zsh cfw_install.sh` |
| Dev overlay (`rpcserver_ios` replacement)     | -                               | Y (`apply_dev_overlay`)    | -                                             |
| SSH readiness wait before install             | Y (`wait_for_device_ssh_ready`) | -                          | Y (inherited from base run)                   |
| launchd jetsam patch (`patch-launchd-jetsam`) | -                               | Y (base-flow injection)    | Y (JB-1)                                      |
| launchd dylib injection (`inject-dylib /b`)   | -                               | -                          | Y (JB-1)                                      |

| Procursus bootstrap deployment | - | - | Y (JB-2) |
| BaseBin hook deployment (`*.dylib` -> `/mnt1/cores`) | - | - | Y (JB-3) |
| First-boot JB finalization (`vphone_jb_setup.sh`) | - | - | Y (post-boot; now fails before done marker if TrollStore Lite install does not complete) |
| Additional input resources | `cfw_input` | `cfw_input` + `resources/cfw_dev/rpcserver_ios` | `cfw_input` + `cfw_jb_input` |
| Extra tool requirement beyond base | - | - | `zstd` |
| Halt behavior | Halts unless `CFW_SKIP_HALT=1` | Halts unless `CFW_SKIP_HALT=1` | Always halts after JB phases |

## Summary

| Component                | Regular | Dev |  JB |
| ------------------------ | ------: | --: | --: |
| AVPBooter                |       1 |   1 |   1 |
| iBSS                     |       2 |   2 |   3 |
| iBEC                     |       3 |   3 |   3 |
| LLB                      |       6 |   6 |   6 |
| TXM                      |       1 |  12 |  12 |
| Kernel (base)            |      28 |  28 |  28 |
| Kernel (JB methods)      |       - |   - |  59 |
| Boot chain total         |      41 |  52 | 112 |
| CFW binary patches       |       4 |   5 |   6 |
| CFW installed components |       6 |   7 |   9 |
| CFW total                |      10 |  12 |  15 |
| Grand total              |      51 |  64 | 127 |

## Ramdisk Variant Matrix

| Variant       | Pre-step            | `Ramdisk/txm.img4`               | `Ramdisk/krnl.ramdisk.img4`                                                      | `Ramdisk/krnl.img4`                       | Effective kernel used by `ramdisk_send.sh`          |
| ------------- | ------------------- | -------------------------------- | -------------------------------------------------------------------------------- | ----------------------------------------- | --------------------------------------------------- |
| `RAMDISK`     | `make fw_patch`     | release TXM + base TXM patch (1) | base kernel (28), legacy `*.ramdisk` preferred else derive from pristine CloudOS | restore kernel from `fw_patch` (28)       | `krnl.ramdisk.img4` preferred, fallback `krnl.img4` |
| `DEV+RAMDISK` | `make fw_patch_dev` | release TXM + base TXM patch (1) | base kernel (28), same derivation rule                                           | restore kernel from `fw_patch_dev` (28)   | `krnl.ramdisk.img4` preferred, fallback `krnl.img4` |
| `JB+RAMDISK`  | `make fw_patch_jb`  | release TXM + base TXM patch (1) | base kernel (28), same derivation rule                                           | restore kernel from `fw_patch_jb` (28+59) | `krnl.ramdisk.img4` preferred, fallback `krnl.img4` |

## Cross-Version Dynamic Snapshot

| Case                | TXM_JB_PATCHES | KERNEL_JB_PATCHES |
| ------------------- | -------------: | ----------------: |
| PCC 26.1 (`23B85`)  |             14 |                59 |
| PCC 26.3 (`23D128`) |             14 |                59 |
| iOS 26.1 (`23B85`)  |             14 |                59 |
| iOS 26.3 (`23D127`) |             14 |                59 |

## Swift Migration Notes (2026-03-10)

- Swift `FirmwarePatcher` now matches the Python reference patch output across all checked components:
  - `avpbooter` 1/1
  - `ibss` 4/4
  - `ibec` 7/7
  - `llb` 13/13
  - `txm` 1/1
  - `txm_dev` 12/12
  - `kernelcache` 28/28
  - `ibss_jb` 1/1
  - `kernelcache_jb` 84/84
- JB parity fixes completed in Swift:
  - C23 `vnode_getattr` resolution now follows the Python backward BL scan and resolves `0x00CD44F8`.
  - C22 syscallmask cave encodings were corrected and centralized in `ARM64Constants.swift`.
  - Task-conversion matcher masks and kernel-text scan range were corrected, restoring the patch at `0x00B0C400`.
  - `jbDecodeBranchTarget()` now correctly decodes `cbz/cbnz`, restoring the real `_bsd_init` rootauth gate at `0x00F7798C`.
  - IOUC MACF matching now uses Python-equivalent disassembly semantics for the aggregator shape, restoring the deny-to-allow patch at `0x01260644`.
- C24 `kcall10` cave instruction bytes were re-verified against macOS `clang`/`as`; no Swift byte changes were needed.
- The Swift pipeline is now directly invokable from the product binary:
  - `vphone-cli patch-firmware --vm-directory <dir> --variant {regular|dev|jb}`
  - `vphone-cli patch-component --component {txm|kernel-base} --input <file> --output <raw>` is available for non-firmware tooling that still needs a single patched payload during ramdisk packaging
  - default loader now preserves IM4P containers via `IM4PHandler`
  - DeviceTree patching now uses the real Swift `DeviceTreePatcher` in the pipeline
  - project `make fw_patch`, `make fw_patch_dev`, and `make fw_patch_jb` targets now invoke this Swift pipeline via the unsigned debug `vphone-cli` build, while the signed release build remains reserved for VM boot/DFU paths
  - on 2026-03-11, the legacy Python firmware patcher entrypoints and patch modules were temporarily restored from pre-removal history for parity/debug work.
  - after byte-for-byte parity was revalidated against Python on `26.1` and `26.3` for `regular`, `dev`, and `jb`, those legacy firmware-patcher Python sources and transient comparison/export helpers were removed again so the repo keeps Swift as the single firmware-patching implementation.
- Swift pipeline follow-up fixes completed after CLI bring-up:
  - `findFile()` now supports glob patterns such as `AVPBooter*.bin` instead of treating them as literal paths.
  - JB variant sequencing now runs base iBSS/kernel patchers first, then the JB extension patchers.
  - Sequential pipeline application now merges each patcher's `PatchRecord` writes onto the shared output buffer while keeping later patcher searches anchored to the original payload, matching the standalone Swift/Python validation model.
  - `apply()` now reuses an already-populated `patches` array instead of re-running `findAll()`, so `patch-firmware` / `patch-component` no longer double-scan or double-print the same component diagnostics on a single invocation.
  - unaligned integer reads across the firmware patcher now go through a shared safe `Data.loadLE(...)` helper, fixing the JB IM4P crash (`Swift/UnsafeRawPointer.swift:449` misaligned raw pointer load).
  - `TXMPatcher` now preserves pristine Python parity by preferring the legacy trustcache binary-search site when present, and only falls back to the selector24 hash-flags call chain (`ldr x1, [x20,#0x38]` -> `add x2, sp, #4` -> `bl` -> `ldp x0, x1, [x20,#0x30]` -> `add x2, sp, #8` -> `bl`) when rerunning on a VM tree that already carries the dev/JB selector24 early-return patch.
  - `scripts/fw_prepare.sh` now deletes stale sibling `*Restore*` directories in the working VM directory before patching continues, so a fresh `make fw_prepare && make fw_patch` cannot accidentally select an older prepared firmware tree (for example `26.1`) when a newer one (for example `26.3`) was just generated.
- IM4P/output parity fixes completed after synthetic full-pipeline comparison:
  - `IM4PHandler.save()` no longer forces a generic LZFSE re-encode.
  - Swift now rebuilds IM4Ps in the same effective shape as the Python patch flow and only preserves trailing `PAYP` metadata for `TXM` (`trxm`) and `kernelcache` (`krnl`).
  - `IBootPatcher` serial labels now match Python casing exactly (`Loaded iBSS`, `Loaded iBEC`, `Loaded LLB`).
  - `DeviceTreePatcher` now serializes the full patched flat tree, matching Python `dtree.py`, instead of relying on in-place property writes alone.
- Synthetic CLI dry-run status on 2026-03-10 using IM4P-backed inputs under `ipsws/patch_refactor_input`:
  - regular: 58 patch records
  - dev: 69 patch records
  - jb: 154 patch records
- Full synthetic Python-vs-Swift pipeline comparison status on 2026-03-10 using `scripts/compare_swift_python_pipeline.py`:
  - regular: all 7 component payloads match
  - dev: all 7 component payloads match
  - jb: all 7 component payloads match
- Real prepared-firmware Python-vs-Swift pipeline comparison status on 2026-03-10 using `vm/` after `make fw_prepare`:
  - historical note: the now-removed `scripts/compare_swift_python_pipeline.py` cloned only the prepared `*Restore*` tree plus `AVPBooter*.bin`, `AVPSEPBooter*.bin`, and `config.plist`, avoiding `No space left on device` failures from copying `Disk.img` after `make vm_new`.
  - regular: all 7 component payloads match
  - dev: all 7 component payloads match
  - jb: all 7 component payloads match
- Runtime validation blocker observed on 2026-03-10:
  - `NONE_INTERACTIVE=1 SKIP_PROJECT_SETUP=1 make setup_machine JB=1` reaches the Swift patch stage and reports `[patch-firmware] applied 154 patches for jb`, then fails when the flow transitions into `make boot_dfu`.
  - `make boot_dfu` originally failed at launch-policy time with exit `137` / signal `9` because the release `vphone-cli` could not launch on this host.
  - `amfidont` was then validated on-host:
    - it can attach to `/usr/libexec/amfid`
    - the initial path allow rule failed because `AMFIPathValidator` reports URL-encoded paths (`/Volumes/My%20Shared%20Files/...`)
    - rerunning `amfidont` with the encoded project path and the release-binary CDHash allows the signed release `vphone-cli` to launch
    - this workflow is now packaged as `make amfidont_allow_vphone` / `scripts/start_amfidont_for_vphone.sh`
  - With launch policy bypassed, `make boot_dfu` advances into VM setup, emits `vm/udid-prediction.txt`, and then fails with `VZErrorDomain Code=2 "Virtualization is not available on this hardware."`
  - `VPhoneAppDelegate` startup failure handling was tightened so these fatal boot/DFU startup errors now exit non-zero; `make boot_dfu` now reports `make: *** [boot_dfu] Error 1` for the nested-virtualization failure instead of incorrectly returning success.
  - The host itself is a nested Apple VM (`Model Name: Apple Virtual Machine 1`, `kern.hv_vmm_present=1`), so the remaining blocker is lack of nested Virtualization.framework availability rather than firmware patching or AMFI bypass.
  - `boot_binary_check` now uses strict host preflight and fails earlier on this class of host with `make: *** [boot_binary_check] Error 3`, avoiding a wasted VM-start attempt once the nested-virtualization condition is already known.
  - Added `make boot_host_preflight` / `scripts/boot_host_preflight.sh` to capture this state in one command:
    - model: `Apple Virtual Machine 1`
    - `kern.hv_vmm_present`: `1`
    - SIP: disabled
    - `allow-research-guests`: disabled
    - current `kern.bootargs`: empty
    - next-boot `nvram boot-args`: `amfi_get_out_of_my_way=1 -v` (staged on 2026-03-10; requires reboot before it affects launch policy)
    - `spctl --status`: assessments enabled
    - `spctl --assess` rejects the signed release binary
    - unsigned debug `vphone-cli --help`: exit `0`
    - signed release `vphone-cli --help`: exit `137`
    - freshly signed debug control binary `--help`: exit `137`

## Automation Notes (2026-03-06)

- `scripts/setup_machine.sh` non-interactive flow fix: renamed local variable `status` to `boot_state` in first-boot log wait and boot-analysis wait helpers to avoid zsh `status` read-only special parameter collision.
- `scripts/setup_machine.sh` non-interactive first-boot wait fix: replaced `(( waited++ ))` with `(( ++waited ))` in `monitor_boot_log_until` to avoid `set -e` abort when arithmetic expression evaluates to `0`.
- `scripts/jb_patch_autotest.sh` loop fix for sweep stability under `set -e`: replaced `((idx++))` with `(( ++idx ))`.
- `scripts/jb_patch_autotest.sh` zsh compatibility fix: renamed per-case result variable `status` to `case_status` to avoid `status` read-only special parameter collision.
- `scripts/jb_patch_autotest.sh` selection logic update:
  - default run now excludes methods listed in `KernelJBPatcher._DEV_SINGLE_WORKING_METHODS` (pending-only sweep).
  - set `JB_AUTOTEST_INCLUDE_WORKING=1` to include already-working methods and run the full list.
- Sweep run record:
  - `setup_logs/jb_patch_tests_20260306_114417` (2026-03-06): aborted at `[1/20]` with `read-only variable: status` in `jb_patch_autotest.sh`.
  - `setup_logs/jb_patch_tests_20260306_115027` (2026-03-06): rerun after `status` fix, pending-only mode (`Total methods: 19`).
- Final run result from `jb_patch_tests_20260306_115027` at `2026-03-06 13:17`:
  - Finished: 19/19 (`PASS=15`, `FAIL=4`, all fails `rc=2`).
  - Failing methods at that time: `patch_bsd_init_auth`, `patch_io_secure_bsd_root`, `patch_vm_fault_enter_prepare`, `patch_cred_label_update_execve`.
  - 2026-03-06 follow-up: `patch_io_secure_bsd_root` failure is now attributed to a wrong-site patch in `AppleARMPE::callPlatformFunction` (`"SecureRoot"` gate at `0xFFFFFE000836E1F0`), not the intended `"SecureRootName"` deny-return path. The code was retargeted the same day to `0xFFFFFE000836E464` and re-enabled for the next restore/boot check.
  - 2026-03-06 follow-up: `patch_bsd_init_auth` was retargeted after confirming the old matcher was hitting unrelated code; keep disabled in default schedule until a fresh clean-baseline boot test passes.
  - Final case: `[19/19] patch_syscallmask_apply_to_proc` (`PASS`).
  - 2026-03-06 re-analysis: that historical `PASS` is now treated as a false positive for functionality, because the recorded bytes landed at `0xfffffe00093ae6e4`/`0xfffffe00093ae6e8` inside `_profile_syscallmask_destroy` underflow handling, not in `_proc_apply_syscall_masks`.
  - 2026-03-06 code update: `scripts/patchers/kernel_jb_patch_syscallmask.py` was rebuilt to target the real syscallmask apply wrapper structurally and now dry-runs on `PCC-CloudOS-26.1-23B85 kernelcache.research.vphone600` with 3 writes: `0x02395530`, `0x023955E8`, and cave `0x00AB1720`. User-side boot validation succeeded the same day.
- 2026-03-06 follow-up: `patch_kcall10` was rebuilt from the old ABI-unsafe pseudo-10-arg design into an ABI-correct `sysent[439]` cave. Focused dry-run on `PCC-CloudOS-26.1-23B85 kernelcache.research.vphone600` now emits 4 writes: cave `0x00AB1720`, `sy_call` `0x0073E180`, `sy_arg_munge32` `0x0073E188`, and metadata `0x0073E190`; the method was re-enabled in `_GROUP_C_METHODS`.
  - Observed failure symptom in current failing set: first boot panic before command injection (or boot process early exit).
- Post-run schedule change (per user request):
  - commented out failing methods from default `KernelJBPatcher._PATCH_METHODS` schedule in `scripts/patchers/kernel_jb.py`:
    - `patch_bsd_init_auth`
    - `patch_io_secure_bsd_root`
    - `patch_vm_fault_enter_prepare`
    - `patch_cred_label_update_execve`
- 2026-03-06 re-research note for `patch_cred_label_update_execve`:
  - old entry-time early-return strategy was identified as boot-unsafe because it skipped AMFI exec-time `csflags` and entitlement propagation entirely.
  - implementation was reworked to a success-tail trampoline that preserves normal AMFI processing and only clears restrictive `csflags` bits on the success path.
  - default JB schedule still keeps the method disabled until the reworked strategy is boot-validated.
- Manual DEV+single (`setup_machine` + `PATCH=<method>`) working set now includes:
  - `patch_amfi_cdhash_in_trustcache`
  - `patch_amfi_execve_kill_path`
  - `patch_task_conversion_eval_internal`
  - `patch_sandbox_hooks_extended`
  - `patch_post_validation_additional`
- 2026-03-07 host-side note:
  - reviewed private Virtualization.framework display APIs against the recorder pipeline in `sources/vphone-cli/VPhoneScreenRecorder.swift`.
  - replaced the old AppKit-first recorder path with a private-display-only implementation built around hidden `VZGraphicsDisplay._takeScreenshotWithCompletionHandler:` capture.
  - added still screenshot actions that can copy the captured image to the pasteboard or save a PNG to disk using the same private capture path.
  - `make build` is used as the sanity check path; live VM validation is still needed to confirm the exact screenshot object type returned on macOS 15.
- 2026-03-15 tooling source sync update:
  - removed ad-hoc `git clone` source fetching from `scripts/setup_tools.sh` and `scripts/setup_libimobiledevice.sh`.
  - added pinned git-submodule sources under `scripts/repos/` for: `trustcache`, `insert_dylib`, `libplist`, `libimobiledevice-glue`, `libusbmuxd`, `libtatsu`, `libimobiledevice`, `libirecovery`, `idevicerestore`.
  - setup scripts now initialize required submodules via `git submodule update --init --recursive <path>` and stage build copies under local tool build directories.