From 02d63ed0702e4336ef25d6fc16b889ac810f2f72 Mon Sep 17 00:00:00 2001
From: kisfenyo <nagyfenyvesi.viktor@gmail.com>
Date: Tue, 7 Jul 2026 20:26:32 +0200
Subject: [PATCH] GL-2: --mode appliance|byo install profile (host-install
 v1.10.0) + harness

Mandatory install profile (no default): byo = a host the operator does not
own. Break-glass gated OFF at its call site in byo (root@pam never touched),
mandatory --cores/--memory, argv-time refusals (--enable-oob/--rotate-recovery,
non-9.x PVE, missing --acl-storages), host-mutation disclosure + typed-hostname
ack, byo config asserts (lan_resolver/wg_tunnel/oob off; byo flips the
lan_resolver write default to off), pool+ACL verify asserts in BOTH modes (R2),
--preflight-only (no state, PASS/FAIL verdict), resume mode-mismatch refusal,
FELHOM_INSTALL_STATE_DIR harness override.

NEW scripts/hostinstall-mode-harness.sh: static refusal matrix C1-C4 + grep
invariants + PVE tier (C5 + A/B dry transcripts). 16/16 PASS on felhom-pve
(C5 live); red-proofs RP-1..RP-3 run->fail->revert. shellcheck clean at
severity=warning. Docs: day0-install SC.5 byo section + trust model; REUSE row;
CONTEXT + REPORT. Live drill = GL-6 (supervised); STOP honored (no non-dry run).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PSK5g6qYLknKj8u3QAFEr6
---
 CONTEXT.md                             |  18 ++
 REPORT.md                              | 122 +++++++----
 REUSE.md                               |   1 +
 documentation/runbooks/day0-install.md |  69 ++++++-
 scripts/CHANGELOG.md                   |  34 ++++
 scripts/felhom-host-install.sh         | 267 +++++++++++++++++++++++--
 scripts/hostinstall-mode-harness.sh    | 236 ++++++++++++++++++++++
 7 files changed, 687 insertions(+), 60 deletions(-)
 create mode 100644 scripts/hostinstall-mode-harness.sh

diff --git a/CONTEXT.md b/CONTEXT.md
index 24bd107..3f48ea9 100644
--- a/CONTEXT.md
+++ b/CONTEXT.md
@@ -3,6 +3,24 @@
 > Created with the REUSE.md rollout (2026-07-03). Authoritative history: `hub/CHANGELOG.md` (hub),
 > `website/CHANGELOG.md`, `scripts/CHANGELOG.md`; end-of-task detail in `REPORT.md`.
 
+- **2026-07-07 — TASK GL-2 SHIPPED: `--mode appliance|byo` install profile (host-install v1.10.0 +
+  harness)** — go-live items G2/G4/G5 implemented, **awaiting the supervised GL-6 drill** for live
+  provision/uninstall + C7 verify-drift. DECISIONS: the flag is MANDATORY (no default; the old
+  `--mode provision` value retired with a specific die, `dr` stub kept); break-glass gated at its
+  CALL SITE (byo never touches root@pam); byo requires `--cores`+`--memory`, refuses
+  `--enable-oob`/`--rotate-recovery`/non-9.x-PVE/missing `--acl-storages`; disclosure + typed-hostname
+  ack; **the config write's `lan_resolver` default flips to OFF in byo** (the spec assumed
+  default-off — it was default-ON; appliance unchanged) + post-write asserts refuse
+  lan_resolver/wg_tunnel/oob=true; pool+ACL verify asserts in BOTH modes (R2 lesson);
+  `--preflight-only` (no state, PASS/FAIL verdict, proven live on felhom-pve). NEW
+  `scripts/hostinstall-mode-harness.sh` (static C1–C4 + invariants everywhere; PVE tier: C5 +
+  A/B dry transcripts) — 16/16 PASS on felhom-pve incl. C5 live; red-proofs RP-1..3 run→fail→revert.
+  FINDING: demo-felhom's controller.yaml has EMPTY git.username/git.token → any step-5
+  (re)install for that customer dies until the operator sets real Gitea read creds (relates to the
+  standing scope-down+rotate follow-up). `documentation/pilot/GO-LIVE-PACKAGE.md` is NOT in the
+  repo and no operator copy was provided — the G2/G4/G5 status flip is recorded here instead;
+  add the doc when the operator supplies it. Next: **GL-6 supervised drill** (appliance + byo
+  end-to-end, uninstall/re-provision, C7, the ack prompt interactively).
 - **2026-07-05 — TASK H1 SHIPPED: OOB operator access (hub v0.35.0 + installer + endpoint; agent
   v0.72.0)** — merged E1+H1. Hub: operator OOB peer (`store/wg_operator.go`, `PUT/GET
   /admin/wg/operator-peer` global key) + `oob_peer_ip`/`oob_operator_ssh_key` in the desired-state
diff --git a/REPORT.md b/REPORT.md
index 6db6013..7cb4ba2 100644
--- a/REPORT.md
+++ b/REPORT.md
@@ -2,46 +2,92 @@
 
 > **Overwrite** this file with a summary of the most recent task only (uniform with the other repos; not cumulative). The cumulative hub history lives in [hub/CHANGELOG.md](hub/CHANGELOG.md); the scripts history lives in [scripts/CHANGELOG.md](scripts/CHANGELOG.md).
 
-## TASK H1 — OOB operator access (hub + installer + endpoint half) — hub v0.35.0 (2026-07-05)
+## TASK GL-2 — BYO-host install profile (`--mode appliance|byo`) — host-install v1.10.0 (2026-07-07)
 
-**Baseline:** felhom.eu @ `a3ee93e` → pushed. Hub `0.34.1` → **`0.35.0`** (live via ArgoCD). Agent half
-= felhom-agent v0.72.0. The merged E1+H1 operator-SSH-access feature. Provenance: both
-`SPIKE-{felhom-sshd,oob-wg-operator-peer}-2026-07-05`.
+**Baseline confirmed:** felhom.eu @ `1a1e42ad`, `SCRIPT_VERSION="1.9.1"` → **`1.10.0`**.
+Implementation + static/dry validation only per spec §0 — **the live provision/uninstall runs are
+GL-6 (operator-supervised)**; the §13 STOP was honored (zero non-dry installer invocations anywhere).
 
-### Shipped
-- **Operator OOB peer** (`store/wg_operator.go`): the fleet operator peer as an UNBOUND `wg_peers` row
-  (host_id '', note operator-oob) at an EXPLICIT /32; validated; last-write-wins rotation; rides
-  ListWGPeers → peersync pushes it to the endpoint. `PUT/GET /admin/wg/operator-peer` (global key);
-  PUT also takes `ssh_pubkey` (hub_settings) + bumps every host's generation.
-- **Desired-state** (`api/wg.go` mergeWireguard): the served wireguard block gains `oob_peer_ip`
-  (rendered into the box's AllowedIPs — survives self-heal [OF-1]) + `oob_operator_ssh_key` (agent
-  writes felhom-sshd's authorized_keys). Absent operator peer → byte-identical pass-through.
-- **OOB health** (`monitor/host_oob.go`): ingests the agent `oob` heartbeat stanza; transition-based
-  `oob_degraded`/`oob_recovered` warning (felhom-sshd down while the operator peer is configured, OR
-  config invalid). Unconfigured OOB never alerts.
-- **host-install** (`scripts`): `--enable-oob` + `install_oob` install the static felhom-sshd + belt +
-  `felhom-op` user (RuntimeDirectory-guarded); uninstall removes them.
-- **Doc 06 §4.5/§4.6 amended**: forwarding ON but per-pair allow-listed, box↔box drop now explicit;
-  the `oob` health stanza + `oob_degraded` alert. Endpoint runbook §9 added (forward chain + operator
-  peer registration).
+### Files created / modified (single repo, `main`)
 
-### Tests + red-proofs (all green: `go build/vet/test ./...`)
-- store: operator-peer round-trip/rotate/unbound + validation (reserved/taken/out-of-subnet); merge
-  includes oob_peer_ip when configured (absent = byte-identical).
-- api: operator-peer PUT self-scoped-global-only; ssh_pubkey validation.
-- monitor: degraded/recovered transitions; config-invalid alerts; unconfigured-never-alerts;
-  no-stanza-ignored. Red-proof: neuter the emit → the alert test fails.
+- `scripts/felhom-host-install.sh` — v1.10.0 (Parts 1–3; see scripts/CHANGELOG.md for the feature list)
+- `scripts/hostinstall-mode-harness.sh` — NEW (Part 4)
+- `documentation/runbooks/day0-install.md` — `--mode` in every command, new §C.5 (byo command +
+  trust-model paragraph + preflight-only), §C.6 (pre-v1.10.0 resume note), 4 new troubleshooting rows
+- `scripts/CHANGELOG.md`, `REUSE.md` (install-profile-gate pattern row), `CONTEXT.md`, this file
 
-### Live validation (felhom-pve + dev endpoint)
-Endpoint set up first (ip_forward=1 + per-pair forward chain + operator peer registered → pushed to
-wg0). Both spikes' key probes re-run as acceptance — all pass: operator→box SSH as felhom-op with
-scoped sudo; the OF-1 self-heal /32 survival; coexistence (stock :22 PID 922 unchanged, distinct host
-keys, felhom-op denied on :22); the belt (LAN→port dropped, :22 untouched); box↔box drop (counter) +
-peersync survival; PBS unaffected throughout; the healthy `oob` stanza reaches the hub +
-`oob_degraded`/`oob_recovered` fired around a real felhom-sshd downtime. Full detail + the 5
-live-found-and-fixed agent bugs: felhom-agent `REPORT.md`.
+### Spec deviations / judgment calls (each verified against the real code)
 
-### Notes
-- CGNAT still unproven; IPv6/AAAA out of scope; operator-key auto-rotation is a manual re-PUT; the
-  "customer network fully down" case is explicitly OUT OF SCOPE / accepted risk. Operator (global) key
-  = hub `report_api_key`. felhom-pve's operator peer + felhom-sshd + endpoint forwarding stay live.
+1. **`--mode` collision:** v1.9.1 already used `--mode provision|dr`. Resolved: `appliance|byo` are
+   the only install values, `provision` retired with a specific die, the `dr` stub dispatch kept
+   verbatim (the documented 10D seam).
+2. **Spec §2 was wrong about the lan-resolver**: the config write did `setdefault('lan_resolver',
+   {"enable": True})` — default-ON, so the spec's byo assert would have died on every byo install.
+   Fixed by flipping the byo DEFAULT to off (appliance untouched); the assert still dies if a
+   `--preserve-from` config carries true, which is the intended refusal.
+3. The byo skip line reads `break-glass (step 4b) SKIPPED (byo: …)` — NOT the spec's literal
+   `"4b/8 …"` text, because Scenario B / harness H-B forbid the string `4b/8` in the byo transcript
+   (an internal spec contradiction; the greppable invariant won).
+4. `--preflight-only` skips the byo typed ack (prints the disclosure, logs the skip) — nothing will
+   be mutated, and a mandatory prompt would break its re-runnable/scripted purpose.
+5. `documentation/pilot/GO-LIVE-PACKAGE.md` is not in the repo and no operator copy arrived with the
+   task — the G2/G4/G5 → "implemented, awaiting GL-6" flip is recorded in CONTEXT.md; add the doc
+   when supplied.
+
+### Harness results
+
+Static tier (Windows Git Bash AND felhom-pve, identical): **bash -n, C1/C1b/C1c, C2a/C2b, C3/C3b/C3c,
+C4, C6-static, INV-1 (one appliance-gated break-glass call site), INV-2 (chpasswd unreachable outside
+step_break_glass), INV-3 (--mode in usage) — all PASS.**
+
+PVE tier (felhom-pve, read-only, temp `FELHOM_INSTALL_STATE_DIR`): **C5 PASS live** (bogus
+`--acl-storages` entry → die naming it, pre-hub, pre-passphrase). H-A/H-B dry transcripts ran with
+the out-of-band demo passphrase (file→file, never printed) but **die at step 5 with rc=1 — a
+customer-data blocker, not a code bug**: demo-felhom's controller.yaml serves EMPTY
+`git.username`/`git.token`. The transcript span through the break-glass gate was validated manually
+instead: appliance transcript contains `4b/8`; byo transcript contains **no**
+`4b/8`/`chpasswd`/`recovery-credential` and **does** contain the disclosure block, the dry ack line,
+`acl storages all present`, and the host-DNS `:53` line (it correctly showed the live dnsmasq).
+`--preflight-only` proven live both ways: PASS verdict + rc 0 + **zero state entries**; bogus-storage
+run → specific die + `PRE-FLIGHT FAIL (exit 1)` verdict.
+
+**Red-proofs (run → fail → revert, against mutated scratch copies — the repo file was never mutated):**
+- RP-1 un-gated the break-glass call site → INV-1 FAIL (13/16). Reverted (scratch deleted).
+- RP-2 dropped the byo caps requirement → C1/C1b/C1c FAIL (11/16). Reverted.
+- RP-3 dropped the resume mode-mismatch check → C4 FAIL (13/16). Reverted.
+
+### §9 rule 9 — the `_state_mark` dry-run finding
+
+Verified in code: **both** `_state_mark` and `_state_put` begin with `$DRY_RUN && return 0` — dry
+runs write nothing. Belt on top: the harness points `FELHOM_INSTALL_STATE_DIR` (new, harness-only
+env override — none existed) at a throwaway temp dir for EVERY invocation, so even non-dry refusal
+cases can never touch a live `state.json`. Confirmed live: felhom-pve's real state.json was
+byte-untouched (it only ever saw the temp dir) and the preflight-only runs left 0 entries.
+
+### Shellcheck
+
+v0.10.0 (build server 180 + felhom-pve; not installed locally). **Clean at `--severity=warning`**
+on both scripts. Full-severity: 2 pre-existing SC2015 *info* notes on untouched v1.9.1 lines
+(A&&B||C in step_verify) — triaged, not refactored (spec rule 2); 1 new SC2154 false positive on
+the EXIT trap (assignment inside the trap string) — targeted disable comment.
+
+### NOT yet live-validated — awaiting supervised GL-6
+
+- The full appliance AND byo installs end-to-end (rc=0 transcripts blocked today by the
+  demo-felhom git-creds gap below).
+- The uninstall → re-provision drill under both modes.
+- C7: the verify pool/ACL asserts firing on real drift (needs a deliberately-broken live box).
+- The byo typed-hostname ack answered interactively (only its dry/preflight-only branches ran).
+
+### Observations (documented, not acted on)
+
+- **demo-felhom has EMPTY `git.username`/`git.token`** in its served controller.yaml — any step-5
+  (re)install for that customer dies until real Gitea read creds are set (operator; ties into the
+  standing "scope down + rotate the package-WRITE git token" security follow-up).
+- felhom-pve's live install predates `_state_put` — its state.json has only `completed` (no
+  `customer_id`/`provisioned_vmid`/`mode`); a future `--uninstall` there needs an explicit `--vmid`,
+  and §C.6 of the runbook covers the missing-mode resume.
+- A `--resume` that skips preflight never records `mode` into an old state file (it only writes
+  during a full preflight) — harmless (C4 only fires when a mode IS recorded), noted for GL-6.
+- The live host-DNS line on felhom-pve shows the agent's own dnsmasq (lan_resolver is ON there —
+  correct for an appliance; it is exactly what byo now refuses).
diff --git a/REUSE.md b/REUSE.md
index ece574e..50ce5a6 100644
--- a/REUSE.md
+++ b/REUSE.md
@@ -98,6 +98,7 @@
 | Website page | website/index.html | UTF-8 **with BOM**; shared `<nav>`/`<footer>` byte-identical across pages (only `class="active"` differs); two-tone H1 = `<h1>…<span>accent</span></h1>`; all styling in website/assets/site.css tokens (`:root`) — zero embedded `<style>`; `?v=N` cache-bust on site.css/icons.svg; umami snippet; no CDN fonts; no emoji (sprite icons.svg instead). |
 | Gate script | scripts/site_gates.py | Byte-level mechanical gates (BOM, emoji codepoint ranges, nav/footer diff, analytics, banned tokens, cache-bust); run `python scripts/site_gates.py` after ANY website change; non-zero exit on failure. |
 | Fetch-validate-install (shell) | scripts/felhom-host-install.sh `step_agent_install` (~L1108) | `fetch_raw` to mktemp → syntax-check (`bash -n`) → `install -m0755 -o root -g root` → only then activate; guarded-mkfs wrapper installed BEFORE the sudoers that references it (ordering is the safety property). All mutations through `run()` (dry-run aware). |
+| Install-profile gate (shell) | scripts/felhom-host-install.sh `--mode appliance\|byo` (GL-2, v1.10.0) | Mandatory-flag profile (no default), refusals at argv time BEFORE any prompt/step, risky step gated at its CALL SITE (one auditable place — never a branch inside the step), mode persisted to state.json + resume-mismatch refusal, `FELHOM_INSTALL_STATE_DIR` override for harness isolation. Harness: scripts/hostinstall-mode-harness.sh (static refusal matrix + grep-invariants + PVE dry-transcript tier; red-proofs run against a mutated scratch copy). |
 | Website deploy (manifest) | manifests/webpage.yaml | git-sync sidecar (sparse-checkout `/website/` + `/scripts/`, `--link=current`) + init container waits for first sync; nginx serves `current/website`; push to main = deployed, no image build. |
 | Secret handling (manifest) | manifests/hub.yaml (env, ~L142) | Secrets via `secretKeyRef` to OUT-OF-BAND secrets created per documentation/runbooks/secrets.md — never inline stringData (see §3). ERRATA (2026-07-03): only `resend-api` is truly out-of-band today; `gitea-creds` is COMMITTED in manifests/felhom.secret.yaml AND live-consumed by hub.yaml — rotation + de-git is a pending operator task (spike SPIKE-a1 appendix). |
 | Hub deploy (GitOps) | manifests/hub.yaml `image:` (~L129) | Pinned explicit tag, bumped in git, deliberate ArgoCD sync (auto-sync OFF). Code push alone deploys nothing. |
diff --git a/documentation/runbooks/day0-install.md b/documentation/runbooks/day0-install.md
index e17f3a4..92538d7 100644
--- a/documentation/runbooks/day0-install.md
+++ b/documentation/runbooks/day0-install.md
@@ -14,6 +14,12 @@
 >
 > Scope: a **shared** Proxmox box (the colleague's-box model) — a box that already runs, or will run,
 > non-Felhom guests. A dedicated box is the same procedure minus the sizing caution.
+>
+> **v1.10.0 (GL-2): every install now REQUIRES `--mode appliance|byo`** — there is no default. Use
+> `appliance` for a box Felhom owns/manages end-to-end (this guide's drilled path, unchanged apart
+> from the flag); use `byo` for a host the operator does NOT own (the pilot's own PVE) — see §C.5.
+> The byo profile is implemented + statically validated but **not yet drill-validated** (that is the
+> supervised GL-6 run).
 
 ## Who does what
 
@@ -135,7 +141,7 @@ Notes:
 ```bash
 curl -fsSO https://felhom.eu/scripts/felhom-host-install.sh
 chmod +x felhom-host-install.sh
-./felhom-host-install.sh -h | head -3      # sanity: must print v1.9.1 (or newer) — the version this guide was drilled against
+./felhom-host-install.sh -h | head -3      # sanity: must print v1.10.0 (or newer) — older scripts don't know --mode
 ```
 
 ### C.2 Preview (recommended)
@@ -144,7 +150,7 @@ chmod +x felhom-host-install.sh
 read-only and asks for the passphrase):
 
 ```bash
-./felhom-host-install.sh --customer-id <CUSTOMER-ID> --vmid <VMID> \
+./felhom-host-install.sh --customer-id <CUSTOMER-ID> --mode appliance --vmid <VMID> \
     --cores 2 --memory 4096 \
     --force-gitea-golden --acl-storages "local local-lvm" \
     --dry-run
@@ -153,7 +159,7 @@ read-only and asks for the passphrase):
 ### C.3 The canonical shared-box install command
 
 ```bash
-./felhom-host-install.sh --customer-id <CUSTOMER-ID> --vmid <VMID> \
+./felhom-host-install.sh --customer-id <CUSTOMER-ID> --mode appliance --vmid <VMID> \
     --cores 2 --memory 4096 \
     --force-gitea-golden --acl-storages "local local-lvm"
 ```
@@ -163,6 +169,7 @@ Placeholders and flags — what and why:
 | Flag | Value | Why |
 |---|---|---|
 | `--customer-id` | the Part A customer ID | keys every hub call |
+| `--mode` | `appliance` or `byo` | REQUIRED, no default. `appliance` = a Felhom-owned/managed box (this section). `byo` = a host the operator does not own — use §C.5's command instead |
 | `--vmid` | the free vmid from Part B | ALWAYS pass it explicitly — deterministic, and recorded in the install state for a later `--uninstall` |
 | `--cores 2 --memory 4096` | the appliance cap | protects the other guests on a shared box; size to roughly half the host if the box is small (cap ≤ host resources) |
 | `--force-gitea-golden` | — | a fresh box has no local golden archive; fetch it from Gitea and verify its sha256 against the hub manifest (this is the normal customer path) |
@@ -196,7 +203,57 @@ Expected duration: minutes; dominated by the two Gitea downloads (agent ~20 MB,
 the customer's uplink.
 
 If a step fails: read the error (they are specific), fix the cause, re-run the SAME command with
-`--resume` appended.
+`--resume` appended (with the SAME `--mode` — the script refuses a mode flip on a half-done install).
+
+### C.5 BYO hosts (`--mode byo`) — installing on a Proxmox server the operator does NOT own
+
+**Trust model.** On a BYO host the roles invert: the box owner is root and stays root; Felhom is the
+guest. The installer therefore (a) never touches the owner's credentials — the break-glass step
+(4b/8, root@pam reset + hub vault) is skipped entirely, nothing is vaulted; (b) treats the owner's
+workloads as the thing to protect — the CPU/RAM caps are mandatory, they are the only
+noisy-neighbor containment there; (c) refuses anything host-invasive that the appliance profile
+allows (`--enable-oob`, `--rotate-recovery`, unvalidated PVE majors, ACL grants on storages the box
+doesn't have); and (d) asserts the written agent config keeps `lan_resolver`/`wg_tunnel`/`oob` OFF
+— the agent must not take over the owner's DNS or open tunnels. Recovery on a BYO box = the owner's
+own console access, by design.
+
+**Recommended first run — preflight only** (all step-1 checks incl. the byo gates, an explicit
+PASS/FAIL verdict, exit 0/1, writes nothing — re-runnable any number of times):
+
+```bash
+./felhom-host-install.sh --customer-id <CUSTOMER-ID> --mode byo --vmid <VMID> \
+    --cores <N> --memory <MiB> \
+    --force-gitea-golden --acl-storages "local local-lvm" \
+    --preflight-only
+```
+
+**The install command** (same flags, minus `--preflight-only`):
+
+```bash
+./felhom-host-install.sh --customer-id <CUSTOMER-ID> --mode byo --vmid <VMID> \
+    --cores <N> --memory <MiB> \
+    --force-gitea-golden --acl-storages "local local-lvm"
+```
+
+What byo does differently (everything else matches C.4's eight steps):
+
+- `--cores` AND `--memory` are **required** — size them WITH the owner (the guest must never starve
+  the owner's guests). `--acl-storages` must name storages that actually exist on the box, or the
+  preflight dies naming the missing ones.
+- Preflight additionally prints what already listens on the host's `:53` (informational — Felhom
+  never configures DNS on a byo box) and the existing-guest count.
+- At the end of preflight the script prints the **complete host-mutation list** (pveum
+  roles/user/token/ACL/pool, agent user/binary/unit/sudoers/config/state, the watchdog + guarded
+  wrappers, the guest + golden) and requires typing the host's **short hostname** to proceed —
+  show this list to the box owner; it is the consent artifact.
+- Step 4b/8 (break-glass) is skipped; the verify step asserts pool membership + the scoped ACL
+  grants landed (both modes do this from v1.10.0).
+
+### C.6 Post-hoc mode note for pre-v1.10.0 installs
+
+Boxes installed by ≤ v1.9.1 have no recorded mode; their state file simply predates it. `--resume`
+on such a box accepts whichever `--mode` you pass — pass the mode that matches how the box is
+actually operated (existing Felhom-owned boxes: `appliance`).
 
 ---
 
@@ -306,6 +363,10 @@ roles/ACL/token/user, the pool (if empty), the install state file.
 
 | Symptom | Cause | Fix |
 |---|---|---|
+| dies immediately: "--mode is required" | v1.10.0+ has no default profile | add `--mode appliance` (Felhom-owned box) or `--mode byo` (owner's box, §C.5) |
+| dies immediately: "byo mode requires explicit --cores and --memory" | byo caps are mandatory | size the caps with the box owner and pass both |
+| dies: "install started as X; resume with --mode X" | `--resume` with the other mode | resume with the recorded mode, or `--uninstall` and start over |
+| byo dies: "acl storage(s) not found on this box" | `--acl-storages` names a storage the box lacks | pass the box's real storages (check `pvesm status`) |
 | step 1 dies: "this is a N-node cluster" | multi-node cluster | re-run with `--node <name>` |
 | step 5 dies: "hub artifact manifest has no agent version" | Day-0 manifest unset/incomplete | Part A.3 — set it in the operator UI |
 | step 5 dies: "no git token in controller.yaml" | customer created without git credentials | Part A.2 — add `git.username`/`git.token`, regenerate config |
diff --git a/scripts/CHANGELOG.md b/scripts/CHANGELOG.md
index cbf0647..e429d22 100644
--- a/scripts/CHANGELOG.md
+++ b/scripts/CHANGELOG.md
@@ -1,5 +1,39 @@
 # Felhom scripts — Changelog
 
+## felhom-host-install v1.10.0 — --mode appliance|byo install profile (TASK GL-2, go-live G2/G4/G5) (2026-07-07)
+
+- **`--mode appliance|byo` is now REQUIRED** for a fresh install / `--resume` (no default — the
+  build-golden v2.0.0 precedent). `appliance` = the historical behavior, dry-transcript-preserved.
+  `byo` = a Proxmox host the operator does NOT own (the pilot): **`step_break_glass` is gated OFF at
+  its call site** (root@pam never reset, nothing vaulted — the one place the skip is auditable),
+  `--cores` + `--memory` both mandatory (the only noisy-neighbor protection there),
+  `--enable-oob`/`--rotate-recovery` refused at argv time, PVE-major gate (die on non-9.x unless
+  `--force`), every `--acl-storages` entry must exist on the box (die naming ALL missing; appliance
+  warns), informational host-DNS `:53` line, full host-mutation disclosure + typed-hostname
+  acknowledgement (`/dev/tty`, dry-run-aware), and post-write config asserts that refuse
+  `lan_resolver.enable`/`wg_tunnel.enabled`/`oob.enabled` = true (byo also flips the config write's
+  lan_resolver DEFAULT to off; appliance keeps default-on).
+- The old `--mode provision` value is retired (specific die message); the `dr` stub seam is kept.
+  The mode is persisted in state.json; a `--resume` under the other mode refuses (C4).
+- **Verify asserts (BOTH modes — campaign-2 R2 lesson):** the verify step now asserts pool
+  membership of the provisioned vmid + every scoped ACL grant (user AND token: Base@/,
+  Guest@/pool/felhom, Store@each storage); any miss → error + "WITH WARNINGS" verdict.
+- **`--preflight-only`**: runs the full mode-aware step-1 checks, prints an explicit
+  `PRE-FLIGHT PASS/FAIL` verdict, exits 0/1, writes NO state marks (never lets a later `--resume`
+  skip the real preflight). Existing-guest count line added to preflight (both modes).
+- `FELHOM_INSTALL_STATE_DIR` env override (test-harness only) so harness cases can never touch a
+  live `state.json`; `usage()` switched to a marker-based range (the numeric one had drifted).
+- **NEW `scripts/hostinstall-mode-harness.sh`**: static tier (bash -n, shellcheck, C1–C4 refusal
+  matrix asserting exact die messages, grep-invariants: one gated break-glass call site, chpasswd
+  unreachable outside it, --mode in usage) + PVE tier (C5 live-refusal + Scenario A/B dry
+  transcripts via `FELHOM_TEST_CUSTOMER`/`FELHOM_TEST_PASSFILE`). Red-proofs RP-1..RP-3 executed
+  (gate removed / caps requirement dropped / mode-mismatch check dropped → matching case FAILs).
+- Live-validated read-only on felhom-pve: full static tier + C5 + byo dry transcript (no
+  4b/8/chpasswd/recovery-credential; disclosure+ack+DNS+storage lines present) + `--preflight-only`
+  PASS and FAIL verdicts with zero state entries. Full A/B rc=0 transcripts + C7 await the
+  supervised GL-6 drill (blocked today by demo-felhom's EMPTY git.username/git.token — any step-5
+  re-run for that customer dies until the operator sets real Gitea read creds).
+
 ## felhom-host-install — --enable-oob installs the dedicated felhom-sshd OOB instance + belt (TASK H1) (2026-07-05)
 
 - `--enable-oob` + `install_oob` (in step 5): lays down the STATIC OOB parts — `/etc/felhom-sshd` tree
diff --git a/scripts/felhom-host-install.sh b/scripts/felhom-host-install.sh
index 11dda33..3150522 100644
--- a/scripts/felhom-host-install.sh
+++ b/scripts/felhom-host-install.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 #===============================================================================
-# felhom-host-install.sh v1.9.1
+# felhom-host-install.sh v1.10.0
 # Day-0 host-bootstrap for a Felhom Proxmox host (operator-deploy model).
 #
 # Run by the operator on a FRESHLY-PVE-INSTALLED box (after a manual PVE install
@@ -19,16 +19,39 @@
 # new credential. The checksum trust root is the HUB, not Gitea. This removes the
 # old prerequisite "install the agent binary + unit manually".
 #
+# v1.10.0 (GL-2, go-live G2/G4/G5): explicit --mode appliance|byo install profile — the flag is now
+# REQUIRED for a fresh install (no default; build-golden v2.0.0 precedent: defaults rot). byo =
+# BYO-host hardening for a Proxmox host the operator does NOT own: break-glass (step 4b) gated OFF
+# at its call site (root@pam is never touched), mandatory --cores/--memory noisy-neighbor caps,
+# strict preflight (PVE-major gate, --acl-storages existence, host-DNS :53 info line, host-mutation
+# disclosure + typed-hostname acknowledgement), byo config asserts (lan_resolver/wg_tunnel/oob must
+# stay off), pool+ACL verify asserts (BOTH modes — campaign-2 R2 lesson), and --preflight-only.
+# Test harness: scripts/hostinstall-mode-harness.sh (static tier runs anywhere; PVE tier dry-only).
+#
 # Grounding: documentation/audits/SPIKE-day0-firstboot-handshake-2026-06-26.md
 #
 # Usage:
-#   sudo ./felhom-host-install.sh --customer-id ID [options]
+#   sudo ./felhom-host-install.sh --customer-id ID --mode appliance|byo [options]
 #
 # Required:
 #   --customer-id ID        Customer (must already exist in the hub)
+#   --mode appliance|byo    Install profile (REQUIRED for install/--resume — no default):
+#                             appliance  a Felhom-owned/managed box. Full Day-0 incl. the
+#                                        break-glass root@pam credential (step 4b).
+#                             byo        a host the operator does NOT own (BYO / pilot). NEVER
+#                                        touches root@pam (step 4b skipped), REQUIRES explicit
+#                                        --cores AND --memory, refuses --enable-oob and
+#                                        --rotate-recovery, dies on non-9.x PVE (unless --force)
+#                                        and on --acl-storages entries absent from this box,
+#                                        prints the full host-mutation list and requires typing
+#                                        the host's short hostname, and asserts the agent config
+#                                        keeps lan_resolver/wg_tunnel/oob OFF.
+#                             (dr        the 10D DR stub — documented seam, not implemented.)
 #
 # Options:
-#   --mode provision|dr     provision (Day-0, default) | dr (10D stub — not impl.)
+#   --preflight-only        run ONLY the (mode-aware) step-1 checks: prints PRE-FLIGHT PASS/FAIL,
+#                           exits 0/1, writes NO state, executes NO later step. Re-runnable; valid
+#                           with either mode (mode-specific checks need --mode).
 #   --hub-url URL           default https://hub.felhom.eu
 #   --vmid N                guest VMID to provision. Default 9201; if omitted and 9201 is already
 #                           in use, the script auto-picks the next free id (pct+qm) and asks to
@@ -46,7 +69,8 @@
 #   --datavol-grow N        grow Docker-data vol by N GiB (default: auto-compute)
 #   --sysdata-grow N        grow user-data vol by N GiB (default: auto-compute)
 #
-#   Appliance cap (optional — protect a SHARED host's other guests; needs agent >= v0.52.0):
+#   Guest cap (appliance: optional — protect a SHARED host's other guests; byo: BOTH REQUIRED —
+#   the only noisy-neighbor protection on a host you do not own; needs agent >= v0.52.0):
 #   --cores N               cap the guest to N CPU cores  (0/unset = golden default)
 #   --memory M              cap the guest RAM to M MiB     (0/unset = golden default)
 #
@@ -105,7 +129,7 @@
 
 set -euo pipefail
 
-SCRIPT_VERSION="1.9.1"   # keep in sync with the header line at the top of this file
+SCRIPT_VERSION="1.10.0"   # keep in sync with the header line at the top of this file
 
 #-------------------------------------------------------------------------------
 # Logging (mirrors felhom-controller/scripts/docker-setup.sh)
@@ -125,7 +149,8 @@ die()         { log_error "$1"; exit 1; }
 # Defaults
 #-------------------------------------------------------------------------------
 CUSTOMER_ID=""
-MODE="provision"
+MODE=""                  # --mode appliance|byo (GL-2: REQUIRED for install/--resume, no default; "dr" = the 10D stub)
+PREFLIGHT_ONLY=false     # --preflight-only: run the mode-aware step-1 checks only; no state writes, no later step
 HUB_URL="https://hub.felhom.eu"
 VMID="9201"
 VMID_EXPLICIT=false       # set true when --vmid is given; gates the auto-pick-a-free-vmid behavior
@@ -194,7 +219,9 @@ PVE_PRIVS_BASE="Sys.Audit SDN.Use Datastore.Audit"
 # offsite felhom-pbs MUST be included or the agent's DR backup 403s (SPIKE residual #1). --acl-storages overrides.
 PVE_STORAGES=(local local-lvm felhom-pbs)
 
-STATE_DIR="/var/lib/felhom-install"
+# FELHOM_INSTALL_STATE_DIR: test-harness-only override (hostinstall-mode-harness.sh) so dry/refusal
+# cases can never touch a live install's state.json. Production runs never set it.
+STATE_DIR="${FELHOM_INSTALL_STATE_DIR:-/var/lib/felhom-install}"
 STATE_FILE="${STATE_DIR}/state.json"
 AGENT_CONFIG=""        # resolved in preflight
 HARD_MIN_LVM_GIB=120   # a useful appliance won't fit below this on local-lvm
@@ -214,7 +241,9 @@ ART_GOLDEN_SHA=""
 #-------------------------------------------------------------------------------
 # Helpers
 #-------------------------------------------------------------------------------
-usage() { sed -n '2,95p' "$0" | sed 's/^# \{0,1\}//'; exit 0; }
+# Print the header through the last option line (the "# State (" line is the end marker — keeps the
+# range from drifting as the header grows; v1.9.1's numeric '2,95p' had already drifted).
+usage() { sed -n '2,/^# State (/p' "$0" | sed '$d' | sed 's/^# \{0,1\}//'; exit 0; }
 
 run() {  # simple (no pipes/redirects) mutating command
     if $DRY_RUN; then log_dry "$*"; else "$@"; fi
@@ -825,6 +854,7 @@ while [[ $# -gt 0 ]]; do
         --rotate-recovery) ROTATE_RECOVERY=true; shift ;;
         --enable-oob)      ENABLE_OOB=true; shift ;;
         --acl-storages)    read -ra PVE_STORAGES <<< "$2"; shift 2 ;;
+        --preflight-only)  PREFLIGHT_ONLY=true; shift ;;
         --dry-run)         DRY_RUN=true; shift ;;
         --resume)          RESUME=true; shift ;;
         -h|--help)         usage ;;
@@ -893,7 +923,45 @@ if [[ "$MODE" == "dr" ]]; then
 EOF
     exit 2
 fi
-[[ "$MODE" == "provision" ]] || die "Unknown --mode: $MODE (provision|dr)"
+#===============================================================================
+# GL-2 install-profile validation — everything below runs a real install (or its --preflight-only /
+# --resume variant), so the profile is decided HERE, before the passphrase prompt and any step. The
+# refusals are deliberately argv-time (the harness relies on them firing on a non-PVE machine too).
+#===============================================================================
+case "$MODE" in
+    appliance|byo) ;;
+    "")
+        if $PREFLIGHT_ONLY; then
+            log_warn "--preflight-only without --mode: running the mode-agnostic base checks only"
+        else
+            die "--mode is required: pass --mode appliance (a Felhom-owned box) or --mode byo (a host you do not own). See -h."
+        fi
+        ;;
+    provision) die "--mode provision was retired in v1.10.0 — pass --mode appliance (Felhom-owned box) or --mode byo (a host you do not own)." ;;
+    *) die "Unknown --mode: $MODE (appliance|byo)" ;;
+esac
+
+# BYO argument refusals (C1/C2) — before the passphrase prompt, before any step.
+if [[ "$MODE" == "byo" ]]; then
+    if [[ -z "$CPU_CORES" || -z "$MEM_MIB" ]]; then
+        die "byo mode requires explicit --cores and --memory (noisy-neighbor caps on a host you do not own)"
+    fi
+    if $ENABLE_OOB; then
+        die "--enable-oob is not allowed in byo mode (OOB access on a host the operator does not own is the owner's call; provision it as a separate, owner-consented step)"
+    fi
+    if $ROTATE_RECOVERY; then
+        die "--rotate-recovery is not allowed in byo mode (byo never touches root@pam — there is no recovery credential to rotate)"
+    fi
+fi
+
+# Resume mode-mismatch (C4): an install keeps the mode it started with — mode-flipping a half-done
+# install would skip already-completed steps under the WRONG profile's guarantees.
+if $RESUME; then
+    _recorded_mode=$(_state_get mode || true)
+    if [[ -n "$_recorded_mode" && "$_recorded_mode" != "$MODE" ]]; then
+        die "install started as $_recorded_mode; resume with --mode $_recorded_mode or start over"
+    fi
+fi
 
 #===============================================================================
 # PROVISION MODE
@@ -901,7 +969,7 @@ fi
 [[ -n "$CUSTOMER_ID" ]] || die "--customer-id is required (use -h)"
 
 echo ""
-log_info "felhom-host-install v${SCRIPT_VERSION} — mode=provision customer=${CUSTOMER_ID} vmid=${VMID}"
+log_info "felhom-host-install v${SCRIPT_VERSION} — mode=${MODE:-<preflight-only, no mode>} customer=${CUSTOMER_ID} vmid=${VMID}"
 $DRY_RUN && log_warn "DRY-RUN: no mutations will be performed"
 echo ""
 
@@ -922,6 +990,47 @@ read_passphrase() {
     [[ -n "$PASSPHRASE" ]] || die "empty passphrase"
 }
 
+#-------------------------------------------------------------------------------
+# BYO host-mutation disclosure + typed acknowledgement (GL-2). Printed at the END of preflight so
+# every value shown (vmid, storages, config path) is final. The list follows the CODE (steps 2-8 +
+# the agent's runtime installs), not memory — keep it in sync when a step grows a new host artifact.
+# The ack reads /dev/tty (the script is often `curl | bash`) and mirrors the uninstall confirm's
+# dry-run branch. NO credential is ever printed here — artifact PATHS only.
+#-------------------------------------------------------------------------------
+_byo_disclosure_ack() {
+    echo ""
+    log_step "BYO disclosure — installing Felhom on a host the operator does NOT own will create:"
+    cat <<EOF
+    pveum:  roles ${PVE_ROLE_BASE}/${PVE_ROLE_GUEST}/${PVE_ROLE_STORE} + user ${PVE_USER} + token ${PVE_USER}!${PVE_TOKENID}
+            + scoped ACL grants (Base@/, Guest@/pool/${PVE_POOL}, Store@[${PVE_STORAGES[*]}]) + the '${PVE_POOL}' pool
+    agent:  service user ${AGENT_USER} + ${AGENT_BIN} (+ .bak-* backups; A/B slots via the guarded self-update)
+            + ${AGENT_UNIT} (+ felhom-agent-rollback.service + start-limit drop-in)
+            + ${AGENT_SUDOERS} + state dir ${AGENT_STATE_DIR} + config ${AGENT_CONFIG} (0600)
+    host:   /usr/local/sbin/felhom-mkfs-guarded + /usr/local/sbin/felhom-selfupdate-guarded
+            + felhom-mgmt-watchdog service+timer+script + /etc/tmpfiles.d/felhom-privsep.conf
+            + guest-hook snippet under /var/lib/vz/snippets/ (agent-installed at runtime)
+            + the 'sudo' package if absent + install state dir ${STATE_DIR}
+EOF
+    if $SKIP_PROVISION; then
+        echo "    guest:  none (--skip-provision)"
+    else
+        echo "    guest:  the provisioned Felhom LXC (vmid ${VMID}, capped ${CPU_CORES} cores / ${MEM_MIB} MiB) + its volumes"
+        echo "            + the golden vzdump imported onto storage '${ARCHIVE_STORAGE}'"
+    fi
+    echo "    NOT touched in byo mode: root@pam (no break-glass), host DNS (:53), WireGuard tunnels, OOB sshd."
+    echo ""
+    if $DRY_RUN; then
+        log_dry "would prompt: Type this host's short hostname ($(hostname -s)) to acknowledge the byo install"
+    elif $PREFLIGHT_ONLY; then
+        log_info "  (--preflight-only: acknowledgement prompt skipped — nothing will be mutated)"
+    else
+        local _hn _ans; _hn=$(hostname -s)
+        read -rp "Type this host's short hostname (${_hn}) to acknowledge the byo install: " _ans < /dev/tty
+        [[ "$_ans" == "$_hn" ]] || die "acknowledgement mismatch (got '${_ans}', expected '${_hn}') — aborting, nothing installed"
+        log_success "  byo install acknowledged for host ${_hn}"
+    fi
+}
+
 #-------------------------------------------------------------------------------
 # STEP 1 — pre-flight (fail fast before any mutation)
 #-------------------------------------------------------------------------------
@@ -935,6 +1044,11 @@ step_preflight() {
     command -v python3>/dev/null || die "python3 not found"
 
     local pvever; pvever=$(pveversion | head -1)
+    # GL-2 PVE-major gate: byo installs are validated on PVE 9.x ONLY — on a host we don't own, an
+    # unvalidated major is a refusal, not a warning. Appliance keeps the historical warn-only.
+    if [[ "$pvever" != *"/9."* && "$MODE" == "byo" ]] && ! $FORCE; then
+        die "byo mode is validated on PVE 9.x only (got: $pvever). Pass --force to override deliberately."
+    fi
     [[ "$pvever" == *"/9."* ]] || log_warn "expected PVE 9.x, got: $pvever"
     log_info "  $pvever"
 
@@ -1004,6 +1118,11 @@ step_preflight() {
         fi
     fi
 
+    # Existing-guest context (GL-2, both modes): cheap situational awareness — on a byo/shared box
+    # this is the population the caps + scoped ACL protect.
+    local _guest_count; _guest_count=$( { used_vmids || true; } | wc -l)
+    log_info "  existing guests on this host: ${_guest_count} (pct+qm)"
+
     # archive-storage-exists guard (provision only — the golden lives there + the restore reads it).
     if ! $SKIP_PROVISION; then
         if pvesm status --storage "$ARCHIVE_STORAGE" >/dev/null 2>&1; then
@@ -1013,6 +1132,40 @@ step_preflight() {
         fi
     fi
 
+    # --acl-storages existence (GL-2): the scoped ACL grants Datastore.* at each of these paths — a
+    # grant on a storage this box doesn't have silently protects nothing (campaign-2 R2 class). byo
+    # refuses; appliance warns (the default set includes felhom-pbs, absent on most customer boxes).
+    local _missing_storages=() _acls
+    for _acls in "${PVE_STORAGES[@]}"; do
+        pvesm status --storage "$_acls" >/dev/null 2>&1 || _missing_storages+=("$_acls")
+    done
+    if [[ ${#_missing_storages[@]} -gt 0 ]]; then
+        if [[ "$MODE" == "byo" ]]; then
+            die "acl storage(s) not found on this box: ${_missing_storages[*]} — pass --acl-storages with this box's real storages"
+        fi
+        for _acls in "${_missing_storages[@]}"; do
+            log_warn "  acl storage '$_acls' not found (pvesm status) — its grant will point at nothing"
+        done
+    elif [[ "$MODE" == "byo" ]]; then
+        log_info "  acl storages all present: ${PVE_STORAGES[*]}"
+    fi
+
+    # Host DNS info line (byo only, informational ONLY): the installer never configures DNS and the
+    # byo config asserts keep the agent's lan-resolver off — this line just tells the operator what
+    # already listens on :53 (the owner may run a resolver Felhom must not disturb).
+    if [[ "$MODE" == "byo" ]]; then
+        local _dns53
+        if _dns53=$(ss -H -ltnup 'sport = :53' 2>/dev/null); then
+            if [[ -n "$_dns53" ]]; then
+                log_info "  host DNS (:53): $(echo "$_dns53" | tr -s '[:space:]' ' ' | cut -c1-160)"
+            else
+                log_info "  host DNS (:53): nothing bound"
+            fi
+        else
+            log_warn "  host DNS (:53): could not query (ss failed/absent) — informational check skipped"
+        fi
+    fi
+
     # hub reachable
     local hc; hc=$(http_code "$HUB_URL/api/v1/config/$CUSTOMER_ID" -H "X-Retrieval-Password: preflight-no-op" || echo 000)
     [[ "$hc" != "000" ]] || die "hub unreachable at $HUB_URL"
@@ -1065,9 +1218,19 @@ step_preflight() {
             log_success "  using auto-selected vmid $VMID"
         fi
     fi
-    # Record the customer into the install state (foundation for a later automatic --uninstall).
-    _state_put customer_id "$CUSTOMER_ID"
-    _state_mark preflight
+    # BYO disclosure + typed ack — last, so every disclosed value (vmid incl. auto-pick) is final.
+    if [[ "$MODE" == "byo" ]]; then
+        _byo_disclosure_ack
+    fi
+
+    # Record the customer + install profile into the state (foundation for a later automatic
+    # --uninstall; the mode key backs the C4 resume-mismatch refusal). --preflight-only writes NO
+    # state — it must stay re-runnable and must never let a later --resume skip the real preflight.
+    if ! $PREFLIGHT_ONLY; then
+        _state_put customer_id "$CUSTOMER_ID"
+        _state_put mode "$MODE"
+        _state_mark preflight
+    fi
     log_success "pre-flight passed"
 }
 
@@ -1553,6 +1716,11 @@ step_agent_config() {
 
     if $DRY_RUN; then
         log_dry "write $AGENT_CONFIG (0600): proxmox{endpoint,node=$NODE,token=<secret>,tls.fingerprint=$fp} hub{url=$HUB_URL,host_id=$HOST_ID,api_key=<secret>} local_api{$BRIDGE_ADDR}"
+        if [[ "$MODE" == "byo" ]]; then
+            log_dry "assert (byo) written config: lan_resolver.enable is false/absent"
+            log_dry "assert (byo) written config: wg_tunnel.enabled is false/absent"
+            log_dry "assert (byo) written config: oob.enabled is false/absent"
+        fi
         log_dry "systemctl restart felhom-agent && felhom-agent --config $AGENT_CONFIG --selftest"
         _state_mark agent_config; return 0
     fi
@@ -1562,7 +1730,7 @@ step_agent_config() {
     # Secrets passed via env (NOT argv) to avoid ps exposure.
     PVE_TOKEN="$PVE_TOKEN" HOST_API_KEY="$HOST_API_KEY" \
     NODE="$NODE" FP="$fp" HUB_URL="$HUB_URL" HOST_ID="$HOST_ID" BRIDGE_ADDR="$BRIDGE_ADDR" \
-    PRESERVE_FROM="$PRESERVE_FROM" OUT="$AGENT_CONFIG" python3 <<'PY'
+    PRESERVE_FROM="$PRESERVE_FROM" INSTALL_MODE="$MODE" OUT="$AGENT_CONFIG" python3 <<'PY'
 import json, os
 out = os.environ['OUT']
 base = {}
@@ -1589,7 +1757,13 @@ base['local_api']['listen_addr'] = os.environ['BRIDGE_ADDR']
 base['local_api'].setdefault('cert_file','/var/lib/felhom-agent/local-api.crt')
 base['local_api'].setdefault('key_file','/var/lib/felhom-agent/local-api.key')
 base['local_api'].setdefault('token_store','/var/lib/felhom-agent/local-tokens.log')
-base.setdefault('lan_resolver', {"enable": True})
+# GL-2: byo defaults the lan-resolver OFF (the installer must never take over the owner's host DNS;
+# the post-write byo asserts refuse a true value however it got in). Appliance keeps the historical
+# default-on. setdefault either way — a --preserve-from section wins and the asserts judge it.
+if os.environ.get('INSTALL_MODE') == 'byo':
+    base.setdefault('lan_resolver', {"enable": False})
+else:
+    base.setdefault('lan_resolver', {"enable": True})
 # Day-0 overrides (always authoritative)
 base['proxmox'] = {
     "endpoint":"https://127.0.0.1:8006",
@@ -1614,6 +1788,25 @@ PY
     chmod 600 "$AGENT_CONFIG"
     log_success "  wrote $AGENT_CONFIG (0600 ${AGENT_USER})"
 
+    # GL-2 byo config asserts: these three features take over host DNS / open tunnels — forbidden on
+    # a customer/BYO box until their production endpoints exist. Parse the JUST-WRITTEN file (same
+    # interpreter pattern as the write above) and refuse to start the daemon on any true value —
+    # a --preserve-from carrying lan_resolver.enable=true is exactly what this catches.
+    if [[ "$MODE" == "byo" ]]; then
+        AGENT_CONFIG="$AGENT_CONFIG" python3 <<'PY' || die "byo config assert FAILED — see the keys above; a byo box must keep lan_resolver/wg_tunnel/oob off (fix the preserved config and re-run with --resume)"
+import json, os, sys
+d = json.load(open(os.environ['AGENT_CONFIG']))
+bad = []
+if d.get('lan_resolver', {}).get('enable'):  bad.append('lan_resolver.enable (takes over host DNS on :53)')
+if d.get('wg_tunnel', {}).get('enabled'):    bad.append('wg_tunnel.enabled (opens an outbound WG tunnel)')
+if d.get('oob', {}).get('enabled'):          bad.append('oob.enabled (starts a second operator sshd)')
+if bad:
+    print('byo-forbidden config keys are TRUE: ' + '; '.join(bad), file=sys.stderr)
+    sys.exit(1)
+PY
+        log_success "  byo config asserts passed (lan_resolver.enable / wg_tunnel.enabled / oob.enabled all off)"
+    fi
+
     # health: read-only selftest (proxmox) must pass before provisioning
     if ! felhom-agent --config "$AGENT_CONFIG" --selftest >/dev/null 2>&1; then
         felhom-agent --config "$AGENT_CONFIG" --selftest 2>&1 | tail -20 >&2
@@ -1731,12 +1924,31 @@ step_provision() {
 #-------------------------------------------------------------------------------
 step_verify() {
     log_step "verify"
-    if $DRY_RUN; then log_dry "pct status/config $VMID; docker ps in-guest; host-report includes $VMID"; return 0; fi
+    if $DRY_RUN; then log_dry "pct status/config $VMID; docker ps in-guest; host-report includes $VMID; assert guest $VMID in pool $PVE_POOL + scoped ACL grants present (user+token: Base@/, Guest@/pool/$PVE_POOL, Store@[${PVE_STORAGES[*]}])"; return 0; fi
     local ok=true
     local st; st=$(pct status "$VMID" 2>/dev/null | awk '{print $2}')
     [[ "$st" == "running" ]] && log_success "  pct status: running" || { log_error "  pct status: $st"; ok=false; }
     if pct config "$VMID" 2>/dev/null | grep -q '^onboot: 1'; then log_success "  onboot: 1"; else log_error "  onboot NOT 1"; ok=false; fi
     pct config "$VMID" 2>/dev/null | grep -E '^(rootfs|mp0|mp1|mp8):' | sed 's/^/    /'
+    # GL-2 pool + ACL asserts (BOTH modes — campaign-2 R2 proved membership can silently drop, and a
+    # guest outside the pool is a guest the scoped token cannot manage).
+    local members; members=" $(pool_members || true) "
+    if [[ "$members" == *" $VMID "* ]]; then
+        log_success "  pool: guest $VMID is a member of $PVE_POOL"
+    else
+        log_error "  pool: guest $VMID NOT in pool $PVE_POOL (the scoped token cannot manage it — adopt with --adopt-pool)"; ok=false
+    fi
+    local _pairs=("/ $PVE_ROLE_BASE" "/pool/$PVE_POOL $PVE_ROLE_GUEST") _pair _apath _arole _acls2
+    for _acls2 in "${PVE_STORAGES[@]}"; do _pairs+=("/storage/$_acls2 $PVE_ROLE_STORE"); done
+    for _pair in "${_pairs[@]}"; do
+        _apath="${_pair% *}"; _arole="${_pair#* }"
+        if _acl_grant_present "$_apath" user "$PVE_USER" "$_arole" \
+           && _acl_grant_present "$_apath" token "${PVE_USER}!${PVE_TOKENID}" "$_arole"; then
+            log_success "  acl: $_arole@$_apath present (user+token)"
+        else
+            log_error "  acl: $_arole@$_apath MISSING for the user and/or the token (re-apply with --rescope-acl)"; ok=false
+        fi
+    done
     # controller container healthy in-guest — bounded wait (the post-provision reboot + docker start
     # take a while, especially on modest hardware; drill R6 re-verify)
     local cstat="" _waited=0
@@ -1789,7 +2001,19 @@ step_verify_agent() {
 #-------------------------------------------------------------------------------
 # Main
 #-------------------------------------------------------------------------------
-trap 'PASSPHRASE=""; PVE_TOKEN=""; HOST_API_KEY=""; GIT_TOKEN=""' EXIT
+# Scrub secret carriers on any exit; under --preflight-only also print the explicit FAIL verdict
+# (the PASS verdict is printed by the preflight-only branch below).
+# shellcheck disable=SC2154  # _rc IS assigned first inside the trap string itself
+trap '_rc=$?; PASSPHRASE=""; PVE_TOKEN=""; HOST_API_KEY=""; GIT_TOKEN=""; if [[ $_rc -ne 0 ]] && $PREFLIGHT_ONLY; then log_error "PRE-FLIGHT FAIL (exit $_rc) — fix the finding above and re-run"; fi' EXIT
+
+# --preflight-only: the full (mode-aware) step-1 checks, an explicit verdict, exit — no state marks,
+# no later step (GL-2).
+if $PREFLIGHT_ONLY; then
+    step_preflight
+    echo ""
+    log_success "PRE-FLIGHT PASS (mode=${MODE:-unset}) — no state written, no install step executed"
+    exit 0
+fi
 
 if $RESUME && _state_has preflight; then
     # still need the passphrase for enroll/provision even on resume
@@ -1810,7 +2034,14 @@ fi
 should_skip token         || step_token
 should_skip grows         || step_grows
 should_skip enroll        || step_enroll
-should_skip break_glass   || step_break_glass
+# GL-2: break-glass is gated at the CALL SITE (not inside the step) so the byo skip is auditable in
+# one place. byo = a host the operator does not own: root@pam is the OWNER's credential — never
+# reset, never vaulted.
+if [[ "$MODE" == "appliance" ]]; then
+    should_skip break_glass   || step_break_glass
+else
+    log_skip "break-glass (step 4b) SKIPPED (byo: the host owner manages break-glass; root@pam untouched, nothing vaulted)"
+fi
 should_skip agent_install || step_agent_install
 should_skip agent_config  || step_agent_config
 should_skip golden        || step_golden
diff --git a/scripts/hostinstall-mode-harness.sh b/scripts/hostinstall-mode-harness.sh
new file mode 100644
index 0000000..ce48cef
--- /dev/null
+++ b/scripts/hostinstall-mode-harness.sh
@@ -0,0 +1,236 @@
+#!/bin/bash
+#===============================================================================
+# hostinstall-mode-harness.sh — GL-2 test harness for felhom-host-install.sh's
+# --mode appliance|byo install profile (spec: TASK GL-2; pattern precedent:
+# felhom-agent/scripts/mkfs-guarded-harness.sh).
+#
+# Two tiers, PASS/FAIL per case, nonzero exit on any FAIL:
+#
+#   STATIC tier (runs anywhere with bash + python3 — incl. a Windows Git Bash):
+#     bash -n; shellcheck (if present); the argument-refusal matrix C1-C4
+#     (exit nonzero + the exact die message, asserted BEFORE any host access);
+#     the C6 gate's presence; grep-invariants (exactly one GATED
+#     step_break_glass call site, chpasswd unreachable outside its body,
+#     --mode in usage).
+#
+#   PVE tier (only on a PVE host as root; skips itself cleanly elsewhere):
+#     C5 (byo dies naming a bogus --acl-storages entry — read-only, dies in
+#     preflight before any hub contact) and the Scenario A/B dry-run transcript
+#     checks. A/B need a real customer + retrieval passphrase — provide them
+#     via FELHOM_TEST_CUSTOMER + FELHOM_TEST_PASSFILE (a 0600 passphrase file,
+#     the script's EXISTING non-interactive path); unset -> those cases SKIP.
+#
+# STATE SAFETY (spec §9 rule 9): every invocation of the script under test runs
+# with FELHOM_INSTALL_STATE_DIR pointed at a throwaway temp dir, so NO case can
+# ever touch a live install's /var/lib/felhom-install/state.json. (Dry-run
+# state helpers are additionally no-ops — this is the belt on top.)
+#
+# Red-proofs (spec Part 4): run the harness against a MUTATED COPY of the
+# script (gate removed / requirement dropped) and watch the matching case FAIL:
+#   RP-1  un-gate the step_break_glass call site  -> "break-glass call site gated" FAILs
+#   RP-2  drop the byo --cores/--memory requirement -> C1 FAILs
+#   RP-3  drop the resume mode-mismatch check       -> C4 FAILs
+#
+# Usage: hostinstall-mode-harness.sh [path-to-felhom-host-install.sh]
+#===============================================================================
+set -euo pipefail
+
+SCRIPT="${1:-$(dirname "$0")/felhom-host-install.sh}"
+[[ -r "$SCRIPT" ]] || { echo "no script under test at $SCRIPT" >&2; exit 2; }
+command -v python3 >/dev/null || { echo "python3 required (the script's state helpers use it)" >&2; exit 2; }
+
+pass=0; fail=0; skip=0
+verdict() { # PASS|FAIL|SKIP <name> [detail]
+    local v="$1" name="$2" detail="${3:-}"
+    case "$v" in
+        PASS) pass=$((pass+1)) ;;
+        FAIL) fail=$((fail+1)) ;;
+        SKIP) skip=$((skip+1)) ;;
+    esac
+    printf '%-4s %s\n' "$v" "$name"
+    [[ -n "$detail" ]] && printf '     %s\n' "$detail"
+    return 0
+}
+
+# Throwaway state dir for EVERY run of the script under test (never the live one). On Git Bash the
+# script's python3 may be a native Windows build — hand it a Windows-syntax path via cygpath -m.
+WORK="$(mktemp -d "${TMPDIR:-/tmp}/hostinstall-harness.XXXXXX")"
+trap 'rm -rf "$WORK"' EXIT
+STATE_OVERRIDE="$WORK/state"
+mkdir -p "$STATE_OVERRIDE"
+if command -v cygpath >/dev/null 2>&1; then
+    STATE_OVERRIDE_ENV="$(cygpath -m "$STATE_OVERRIDE")"
+else
+    STATE_OVERRIDE_ENV="$STATE_OVERRIDE"
+fi
+
+# run_script <args...> — run the script under test with the state override; captures stdout+stderr
+# into $out and the exit code into $rc. Never lets a nonzero rc kill the harness.
+out=""; rc=0
+run_script() {
+    set +e
+    out=$(FELHOM_INSTALL_STATE_DIR="$STATE_OVERRIDE_ENV" bash "$SCRIPT" "$@" 2>&1)
+    rc=$?
+    set -e
+}
+
+# expect_die <name> <msg-substr> -- <args...> — the script must exit nonzero AND print msg-substr.
+expect_die() {
+    local name="$1" msg="$2"; shift 2
+    [[ "${1:-}" == "--" ]] && shift
+    run_script "$@"
+    if [[ $rc -ne 0 && "$out" == *"$msg"* ]]; then
+        verdict PASS "$name"
+    else
+        verdict FAIL "$name" "rc=$rc; wanted substring: '$msg'; got: $(echo "$out" | tail -3 | tr '\n' ' ')"
+    fi
+}
+
+echo "=== hostinstall-mode-harness — script under test: $SCRIPT ==="
+echo ""
+echo "--- STATIC tier ---"
+
+# S1: syntax
+if bash -n "$SCRIPT" 2>"$WORK/bashn.err"; then
+    verdict PASS "bash -n"
+else
+    verdict FAIL "bash -n" "$(cat "$WORK/bashn.err")"
+fi
+
+# S2: shellcheck (best-effort — required by the green gate, but the harness itself degrades)
+if command -v shellcheck >/dev/null 2>&1; then
+    if shellcheck --shell=bash --severity=warning "$SCRIPT" >"$WORK/sc.out" 2>&1; then
+        verdict PASS "shellcheck (severity>=warning)"
+    else
+        verdict FAIL "shellcheck (severity>=warning)" "$(head -5 "$WORK/sc.out")"
+    fi
+else
+    verdict SKIP "shellcheck" "not installed here — run it on the build server (green gate still requires it)"
+fi
+
+# C1: byo without --cores/--memory refuses (both missing, and each alone)
+expect_die "C1  byo without caps refused" \
+    "byo mode requires explicit --cores and --memory" \
+    -- --customer-id t --mode byo
+expect_die "C1b byo with only --cores refused" \
+    "byo mode requires explicit --cores and --memory" \
+    -- --customer-id t --mode byo --cores 4
+expect_die "C1c byo with only --memory refused" \
+    "byo mode requires explicit --cores and --memory" \
+    -- --customer-id t --mode byo --memory 8192
+
+# C2: byo refuses --enable-oob / --rotate-recovery, naming the flag
+expect_die "C2a byo --enable-oob refused" \
+    "--enable-oob is not allowed in byo mode" \
+    -- --customer-id t --mode byo --cores 4 --memory 8192 --enable-oob
+expect_die "C2b byo --rotate-recovery refused" \
+    "--rotate-recovery is not allowed in byo mode" \
+    -- --customer-id t --mode byo --cores 4 --memory 8192 --rotate-recovery
+
+# C3: fresh install without --mode refuses, naming both modes
+expect_die "C3  fresh install without --mode refused" \
+    "--mode is required: pass --mode appliance" \
+    -- --customer-id t
+expect_die "C3b unknown --mode refused" \
+    "Unknown --mode: bogus (appliance|byo)" \
+    -- --customer-id t --mode bogus
+expect_die "C3c retired --mode provision refused" \
+    "--mode provision was retired" \
+    -- --customer-id t --mode provision
+
+# C4: --resume with a state.json recording the OTHER mode refuses
+printf '{"completed":["preflight"],"customer_id":"t","mode":"appliance"}\n' > "$STATE_OVERRIDE/state.json"
+expect_die "C4  resume mode-mismatch refused" \
+    "install started as appliance; resume with --mode appliance or start over" \
+    -- --customer-id t --mode byo --cores 4 --memory 8192 --resume
+rm -f "$STATE_OVERRIDE/state.json"
+
+# C6 (static shape): the byo PVE-major gate + its message exist (a non-9.x host isn't available)
+if grep -q 'byo mode is validated on PVE 9.x only' "$SCRIPT" \
+   && grep -B3 'byo mode is validated on PVE 9.x only' "$SCRIPT" | grep -q 'MODE" == "byo"'; then
+    verdict PASS "C6  byo PVE-major gate present (static grep)"
+else
+    verdict FAIL "C6  byo PVE-major gate present (static grep)"
+fi
+
+# INV-1: exactly ONE step_break_glass invocation, and it is gated on MODE == appliance.
+#        (Comment lines and the function definition itself don't count.)
+inv_calls=$(grep -n 'step_break_glass' "$SCRIPT" \
+    | grep -v -E '^[0-9]+:[[:space:]]*#' \
+    | grep -v 'step_break_glass()' || true)
+inv_count=$(echo "$inv_calls" | grep -c 'step_break_glass' || true)
+if [[ "$inv_count" == "1" ]] \
+   && echo "$inv_calls" | grep -q 'should_skip break_glass' \
+   && grep -B4 'should_skip break_glass' "$SCRIPT" | grep -q 'MODE" == "appliance"'; then
+    verdict PASS "INV-1 break-glass call site: exactly one, appliance-gated"
+else
+    verdict FAIL "INV-1 break-glass call site: exactly one, appliance-gated" "count=$inv_count; calls: $(echo "$inv_calls" | tr '\n' ' ')"
+fi
+
+# INV-2: chpasswd is unreachable outside step_break_glass's body (non-comment occurrences only).
+body=$(awk '/^step_break_glass\(\)/{s=NR} s && /^\}/{print s, NR; exit}' "$SCRIPT")
+bstart=${body% *}; bend=${body#* }
+inv2_ok=true
+while IFS=: read -r ln _; do
+    [[ -z "$ln" ]] && continue
+    if [[ "$ln" -lt "$bstart" || "$ln" -gt "$bend" ]]; then inv2_ok=false; fi
+done < <(grep -n 'chpasswd' "$SCRIPT" | grep -v -E '^[0-9]+:[[:space:]]*#' || true)
+if [[ -n "$bstart" && -n "$bend" ]] && $inv2_ok; then
+    verdict PASS "INV-2 chpasswd unreachable outside step_break_glass ($bstart-$bend)"
+else
+    verdict FAIL "INV-2 chpasswd unreachable outside step_break_glass" "body=$bstart-$bend"
+fi
+
+# INV-3: --mode is documented in usage (run the real -h path)
+run_script -h
+if [[ $rc -eq 0 && "$out" == *"--mode appliance|byo"* ]]; then
+    verdict PASS "INV-3 usage documents --mode appliance|byo"
+else
+    verdict FAIL "INV-3 usage documents --mode appliance|byo" "rc=$rc"
+fi
+
+echo ""
+echo "--- PVE tier ---"
+if ! command -v pveum >/dev/null 2>&1 || [[ "$(id -u)" != 0 ]]; then
+    verdict SKIP "PVE tier (C5 + Scenario A/B dry transcripts)" "needs a PVE host as root — run there"
+else
+    # C5: byo with a bogus --acl-storages entry dies in preflight NAMING it (read-only: dies before
+    # any hub contact/passphrase and before any mutation; state override active).
+    expect_die "C5  byo bogus --acl-storages refused, named" \
+        "acl storage(s) not found on this box: definitely-not-a-storage" \
+        -- --customer-id t --mode byo --cores 4 --memory 8192 \
+           --acl-storages "local definitely-not-a-storage" --dry-run
+
+    if [[ -n "${FELHOM_TEST_CUSTOMER:-}" && -n "${FELHOM_TEST_PASSFILE:-}" && -r "${FELHOM_TEST_PASSFILE:-}" ]]; then
+        common=(--customer-id "$FELHOM_TEST_CUSTOMER" --passphrase-file "$FELHOM_TEST_PASSFILE" \
+                --vmid 990100 --cores 2 --memory 4096 --dry-run)
+        # H-A: appliance dry transcript still walks 4b/8 (regression guard)
+        run_script --mode appliance "${common[@]}"
+        if [[ $rc -eq 0 && "$out" == *"4b/8"* ]]; then
+            verdict PASS "H-A appliance dry transcript contains 4b/8"
+        else
+            verdict FAIL "H-A appliance dry transcript contains 4b/8" "rc=$rc"
+        fi
+        # H-B: byo dry transcript — no 4b/8 / chpasswd / recovery-credential; ack + caps + storages present
+        run_script --mode byo "${common[@]}"
+        hb_ok=true; hb_why=""
+        [[ $rc -eq 0 ]] || { hb_ok=false; hb_why+="rc=$rc "; }
+        for bad in "4b/8" "chpasswd" "recovery-credential"; do
+            [[ "$out" != *"$bad"* ]] || { hb_ok=false; hb_why+="contains '$bad' "; }
+        done
+        for want in "acknowledge the byo install" "acl storages all present" "-cores 2 -memory 4096"; do
+            [[ "$out" == *"$want"* ]] || { hb_ok=false; hb_why+="missing '$want' "; }
+        done
+        if $hb_ok; then
+            verdict PASS "H-B byo dry transcript (no root@pam path; ack+caps+storages present)"
+        else
+            verdict FAIL "H-B byo dry transcript" "$hb_why"
+        fi
+    else
+        verdict SKIP "H-A/H-B dry transcripts" "set FELHOM_TEST_CUSTOMER + FELHOM_TEST_PASSFILE (0600 passphrase file) to run"
+    fi
+fi
+
+echo ""
+echo "=== $pass passed, $fail failed, $skip skipped ==="
+[[ $fail -eq 0 ]]