# Phase 6 — recommendations

The v0.4.1 cut leaves OpenPXE in a state where the entire protocol stack
and operator UI are exercised by the automated test suite, the container is
multi-arch buildable, and the image ships at ~97 MB. What's left before
this looks and feels like a 1.0 product is mostly **real-hardware
validation** plus a small batch of features that can only sensibly be
designed once we've watched real machines image.

This doc is a punch list, ordered by what I'd do first if I had a week.

## Tier 1 — must-do before we call anything "stable"

### 1. Real-hardware validation matrix

We have CI tests for every protocol leg, but no end-to-end PXE on real
firmware. Build a small matrix:

| client                              | firmware  | OS family  | pass criteria             |
|-------------------------------------|-----------|------------|---------------------------|
| any 10-y-old mini-PC                | Legacy BIOS | Ubuntu Server 24.04 | gets to GRUB / installer   |
| Intel NUC / similar                 | UEFI x64  | Windows 11 | reaches "where do you want to install" |
| Raspberry Pi 4                      | UEFI ARM64 | Raspberry Pi OS    | gets to login prompt       |
| Dell / HP business laptop          | UEFI x64  | Fedora     | one of: kernel boot or wimboot |

Add a `docs/HARDWARE_VALIDATION.md` checklist that records what worked,
firmware versions, and any quirks. Anything weird gets a regression
test in the relevant crate.

### 2. Boot menu hotkey + UI accessibility audit

The iPXE menu has number-key + letter hotkeys but no documentation on
what they map to. Generate a printable cheat-sheet from
`crates/http-api/src/ipxe_script.rs` so operators don't have to read
the source. Run a screen-reader pass over the web UI — most of it
should be fine since we're mostly tables + form labels, but the
Terminal pane and the SSE log output need explicit `aria-live`
regions.

### 3. Boot.wim re-patch detection

Bootimus v0.1.62's "fingerprint of patched inputs + Save & Re-patch"
pattern is a small but high-value feature: when an operator changes
the SMB host override or upgrades wimboot, the existing patched
boot.wim is silently stale. We should:

- Hash the inputs (smb_host, smb_share, startnet.cmd content,
  wimboot binary digest) into the IsoMeta;
- Surface a "needs re-patch" warning on the Storage tab when the
  hash drifts;
- Add a "Re-patch SMB" button that re-runs the WimPatcher.

## Tier 2 — features that round out pre-beta

### 4. Auto-install file library

iVentoy and Bootimus both support attaching `autounattend.xml` /
`preseed.cfg` / `kickstart.cfg` to an image. The mechanics are
straightforward: store files under `<work_dir>/autoinstall/<distro>/`,
expose CRUD via `/api/autoinstall-files`, and modify the WimPatcher
+ Linux kernel cmdline to fetch + apply the right file. Placeholders
worth supporting (Bootimus pattern): `{{MAC}}`, `{{HOSTNAME}}`,
`{{IP}}`, `{{SERVER_ADDR}}`, `{{IMAGE_FILENAME}}`, substituted
serve-side per request.

### 5. Wake-on-LAN trigger

A natural pair with per-MAC host bindings: bind a MAC to an image,
then click "Wake & Image" to send the magic packet and let OpenPXE
do the rest. Implementation is small (`udp/9` broadcast, magic packet
construction) but it makes the bound-host workflow feel instant.

### 6. Distro profile manifest

Today, distro detection lives as Rust match arms in `introspect.rs`
and the kernel cmdline templates live in `store.rs`. Bootimus extracts
this into a JSON manifest that ships embedded in the binary AND is
overridable by the operator at runtime — so a new distro can be added
without rebuilding the container. Worth porting; it'd let community
contributions land as PRs to a single JSON file.

### 7. Syslog receiver

`smee` ships one. The use case: WinPE / Linux installers can be
configured to syslog over the network to the PXE server; if we have
an endpoint and a place in the UI to view per-client diagnostics,
post-mortem on a failed install gets dramatically easier.

### 8. UEFI HTTP Boot validation

Option 60 = `HTTPClient` is wired up in `decide()` already, but
we've never tested it on real firmware. Some Dell + Lenovo UEFIs
prefer it over PXE-via-TFTP. A quick check on a real machine
(disable TFTP boot in firmware, force HTTP boot) and a regression
test would be nice.

## Tier 3 — bigger lifts, only if there's demand

### 9. Pure-Rust SMB server

`smbd` from Samba is ~80 MB of the runtime image. There are pure-Rust
SMB2 server crates (`smbd-server`, `smb-rs`) of varying maturity.
Replacing the dep would slim the image by ~40% and remove the
`CAP_SYS_ADMIN` requirement for SMB. Worth a spike, not necessarily
landable in Phase 6.

### 10. IPv6 / DHCPv6

PXE-over-IPv6 is real (RFC 5970). Some sites are v6-only. Worth
implementing once we know we have one. Until then, IPv4-only is the
right default — flipping the bit on v6 without v6 testing is asking
for silent breakage.

### 11. Multi-replica deployment

The current design assumes one OpenPXE per broadcast domain. Two
proxies on the same L2 will race; the deployment queue is in-memory, etc.
For HA we'd need to:
- Externalize the deployment queue (Redis, etcd) or lean into "the menu is
  cheap to refetch if a replica dies";
- Ensure DHCP proxy replies are deterministic so a client always
  gets the same answer regardless of which replica replied;
- Document the L2 collision domain story.

This is a large lift and should only happen if someone's actually
asking for it.

### 12. Pi 4 / SBC quirks

Raspberry Pi netboot uses a specific DHCP option-43 vendor field +
TFTP path layout that OpenPXE doesn't currently special-case. There's
a spec; the work is small once we have a Pi to test on.

## What I'd skip

- **A custom DHCP server (not proxy).** The proxy mode is the right
  abstraction; full DHCP would need raw sockets + a lot of corner-case
  handling for problems no operator wants us to solve.
- **A pluggable backend abstraction à la Tinkerbell.** Tinkerbell does
  it because they integrate with k8s CRDs. OpenPXE's "the file system
  IS the database" model is simpler and good enough for the target
  audience. Don't add a Backend trait until something asks for it.
- **Multiple language UIs.** Bootimus added these in v0.1.62 and the
  translations are LLM-generated. Skip until we have real users
  asking for non-English.

## Quick wins (could land in a single afternoon)

- Add a Grafana dashboard JSON to `deploy/grafana/` driven off the
  new `/metrics` endpoint.
- A `openpxe bench` subcommand that runs a 10-second internal load
  test (synthetic queue joins) so an operator can sanity-check tuning.
- Ship a basic `docker-compose.yml` for the Unraid path that demos
  the new themes / progress widget.
- Generate a printable single-page operator runbook from the README
  + architecture.md (e.g. `cargo xtask runbook`).
