FD/LAB · B07UNCLASSIFIED // BY-LINE: THE BENCHON THE LINE
LAB/NOTES
Bench-side scrawl, doctrine arguments, failure logs, and field debriefs. Pinned as the parts get built — published as written, edited only when the field draws a line through them.
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BENCH SURFACE · 09 NOTES
DESIGN
N-0092026.04.22
The duty-day toggle
How the site's light-mode palette works, why it is an opt-in rather than a system preference follow, and what the name means.
WEB
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DESIGN
N-0082026.04.15
The hardware standard
Why Keystone commits to a public hardware family and what that means for repair in the field.
DESIGNKEYSTONE
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DESIGN
N-0072026.04.08
Power budget: HMD-1
How the Sentinel HMD-1 power architecture is being sized, and why the constraints are harder than they look.
ARCHSENTINEL
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DESIGN
N-0062026.03.20
Webbing: the 25mm standard
Why Keystone uses 25mm MIL-spec webbing throughout, and what that choice rules in and out.
DESIGNKEYSTONE
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DESIGN
N-0052026.03.18
Console UI: building the configuration interface
Design decisions behind the Sentinel HMD-1 web configuration console — local-first, single-file, 68KB uncompressed.
WEBSENTINEL
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DESIGN
N-0042026.03.05
Sentinel architecture: single-cable decision
The reasoning behind collapsing power and data onto a single USB-C connection in the HMD-1 architecture — and the specific numbers that made it viable.
ARCHSENTINEL
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FIELD
N-0032026.03.01
Fourth-season design principles
What it means to design for the fourth season, and the constraints that follow from taking it seriously.
FIELDKEYSTONE
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PROCESS
N-0022026.02.27
Keystone A03→A04: weight claim downgrade and what changed
A03 shipped with a 1,340g total weight TARGET. Physical build of A04 came in at 1,387g. This is what we changed and why we didn't fight it.
REVKEYSTONE
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DESIGN
N-0012026.02.14
Keystone layout iteration: why the clamshell won
Three layout variants, two fabrication rounds, and the failure mode that settled the architecture.
DESIGNKEYSTONE
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GET IN TOUCH
A question from the field. A correction. An argument.
Notes are published as written. If something is wrong, disagree, or worth following up on — the bench reads the inbox directly.