Snapmaker Studio v0.4.0-beta.20.4 — Release Acceptance + Trust Cleanup

Independent open-source project — not affiliated with or endorsed by Snapmaker.
"Snapmaker" is a trademark of its respective owner.

No new features. This release makes what Studio says about itself match what it
actually does — in the app and across every document.

In the app

One name for the printer page. It is the Printer Hub everywhere now; a few
places still called it "Printer Doctor" and one step claimed live monitoring was
"read-only" — the Printer Hub monitors and offers controls that always ask for an
explicit confirmation. A test now keeps the naming consistent.
No more future-tense promises. The First Layer page pointed at checks that
"will live in" another page; it now points at what exists today (bed-mesh and
telemetry live in the Printer Hub).

One canonical source for release facts. New
docs/RELEASE_METADATA.md
holds the current version, installer name, size, SHA256, and trust status — other
docs point at it instead of repeating (and drifting from) those values. The README
checksum is filled in again.
Historical documents are labelled. Early fund/judge documents described a
read-only beta that predates Printer Hub controls; each now carries a clear
"HISTORICAL" banner so old claims can't be mistaken for current ones.
Build volume clarified. The U1's printable volume is 270×270×270 mm
(per the Snapmaker Orca U1 profile). The larger figures reported by the printer
itself are axis travel limits, not printable area — the docs now say which is which.
Honest corpus wording. Every "112/112" mention now reads: 112/112 files
produced structurally valid U1 profile copies in the internal validation gate —
this is not a print-success guarantee.
Security notes updated. The desktop app's Content-Security-Policy is enabled
and documented. A new test pins that 3MF archives are parsed fully in memory —
archive entry names are never used as file paths, so crafted-archive path-traversal
attacks don't apply.

Studio prepares U1 profile copies for review in Snapmaker Orca — it does not slice.
Originals are never modified — preparing a model writes a new copy.
No print-success guarantees.
Object placement, spacing and bed-boundary fit remain advisory / not verified by
Studio and must be checked in Snapmaker Orca before slicing.

Local-first · open source (MIT).

Installer: Snapmaker.Studio_0.4.0-beta.20.4_x64-setup.exe (attached below)
SHA256 and size: see docs/RELEASE_METADATA.md
The installer is not code-signed yet, so Windows SmartScreen may show "Unknown publisher". Download only from this GitHub release page and verify the checksum first:
Get-FileHash -Algorithm SHA256 .\Snapmaker.Studio_0.4.0-beta.20.4_x64-setup.exe