Add windows/hardening-spec.md: the detailed config-layer hardening spec for
SilverMetal Enhanced - Windows, with the GPD Pocket 4 (AMD Strix Point) as
reference device. Eight control domains (provisioning, boot/firmware trust,
data-at-rest, kernel/credential isolation, app control, network/radios,
physical/lock-screen, privacy/update) each with verification commands, a
buyer-facing residual-risk statement, and one-off -> SKU productization notes.
Refine the windows/README.md v1 scope to match, grounded in the 2026-06-08
deep-research assessment:
- BitLocker TPM+PIN (never TPM-only) - PIN defeats the faulTPM-class offline
fTPM attack that is literally a BitLocker VMK extraction
- WDAC (App Control), kernel-enforced, audit-first then enforce, as primary;
AppLocker demoted to fallback (rename planned applocker/ -> wdac/)
- Telemetry at GP+service+firewall layers, NOT hosts-file blocking of MS
domains (that breaks Windows Update; violates "update or die")
- Add VBS/HVCI/Credential Guard/Kernel DMA Protection to scope + verify gates
- Note Enterprise (prototype) vs IoT Enterprise LTSC (SKU target) equivalence
Bound by docs/threat-model.md and docs/design-principles.md; nation-state /
firmware tier explicitly NOT claimed on consumer UMPC silicon.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Two product lines, named to make scope obvious to buyers:
- 🔒 SilverMetal OS — we ship the operating system or ROM
(Linux, Pixel, Samsung-unlocked, Motorola-unlocked)
- 🛡️ SilverMetal Enhanced — we harden the OS the device already runs
(Windows, macOS, iOS, generic Android)
Repo alignment:
- SilverVPN already exists as a SilverLABS product (server + MAUI client +
Linux client + tunnel service). stack/vpn/ is now an integration pointer
rather than a re-scaffold; per-platform READMEs reference it.
- SilverApple is deprecated; SilverMetal Enhanced — iOS supersedes it.
Migration step added as roadmap milestone 3I.1.
- SilverDROID name clash explicitly noted as unrelated (it's the SilverSHELL
AppStore Android client, not an Android ROM).
- SilverChat may overlap with SilverVPN.Client.Chat; alignment decision
added as roadmap milestone 1.1.1.
Roadmap restructured: phases now track the OS/Enhanced split.
Platform matrix re-sectioned and decision flowchart updated.
README rewritten around the two-product-line framing.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
