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diff --git a/docs/prototypes/README.org b/docs/prototypes/README.org
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--- a/docs/prototypes/README.org
+++ b/docs/prototypes/README.org
@@ -15,7 +15,123 @@ point at.
   affordance for the NETWORKS/NEARBY headers (busy-style throbber + list fade).
 - [[file:2026-07-03-sound-panel-prototype.html][2026-07-03-sound-panel-prototype.html]] — the audio/pulsemixer console; layout
   reference for [[file:../specs/2026-07-03-audio-panel-spec.org][the audio-panel spec]].
-- [[file:2026-07-03-panel-widget-gallery-prototype.html][2026-07-03-panel-widget-gallery-prototype.html]] — the shared instrument-console
-  widget kit (lamps, engraved sections, console keys, needle gauges).
+- [[file:panel-widget-gallery.html][panel-widget-gallery.html]] — The Dupre Kit: the shared instrument-console
+  gallery (lamps, engraved sections, console keys, needle gauges). The
+  living catalogue: every instrument here is the visual + behavioral spec for
+  its reusable-component ports. All instruments build from [[file:widgets.js][widgets.js]] (below);
+  the gallery page is the reference consumer.
 - [[file:2026-07-03-waybar-redesign-prototype.html][2026-07-03-waybar-redesign-prototype.html]] — three directions for sprucing up
   waybar in the dupre instrument-console aesthetic (future work).
+
+* The Dupre Kit ([[file:widgets.js][widgets.js]])
+
+The whole kit lives in =widgets.js= — a classic script (no modules, no build
+step) exposing the =DUPRE= namespace with one builder per gallery card. Load it
+with =<script src="widgets.js"></script>= and call builders directly.
+
+** Builder contract
+
+=DUPRE.name(host, opts)= → handle ={el, get, set, ...}=. =host= is an empty
+element the instrument renders into. =opts.onChange(value, text)= fires on every
+state change, including the initial paint; =text= is the instrument's canonical
+readout string. (Exception: live meters whose original init was silent — they
+paint on the first =set=/=push=.)
+
+** Styling
+
+Instrument-internal CSS ships inside =widgets.js= (the =DUPRE_CSS= block, injected
+once as =<style id="dupre-css">= at load), so instruments are fully styled on any
+page. The design tokens (=--gold=, =--glow-hi=, the amber family, =--mono=,
+=--pulse-rate=, …) must be defined on =:root= by the consumer — the gallery's
+generated =:root= block is the reference; =tokens.json= is the source.
+
+** Tick contract (live meters)
+
+The page owns the clock and the signal source; builders own rendering state.
+Live meters expose value-driven handles that repaint synchronously and fire
+=onChange=:
+
+- =set(level)= for level meters (peak-hold logic lives in the builder)
+- =push(v)= / =set(samples, current)= for history meters (the builder owns
+  the ring buffer)
+- =set(samples, amp)= for sampled traces (samples normalized)
+
+Instrument-owned animation (the R17 scope trace, R31 radar sweep, R44 servo
+chase, R52 pseudo-PC, R53 day clock, R10 TIME page) runs inside the builder,
+gated on =prefers-reduced-motion=.
+
+** Keyboard contract (instruments that take keys)
+
+Sibling of the tick contract above, and the same split: focus is an ambient
+resource like the clock — exactly one thing holds it across the whole page —
+so *the target owns focus and delivery, the builder declares what it accepts*.
+Neither half works alone. Only the page knows which instrument is live; only the
+instrument knows that Backspace means DEL.
+
+*The builder declares* a =KEYS= table on itself, mapping a canonical key name
+to the argument its handle's =press= takes:
+
+: DUPRE.abcKeypad.KEYS = { A:'A', ..., '0':'0', ..., Space:'SPC', Backspace:'DEL', Enter:'ENT' }
+
+One declaration, wired natively per target:
+
+- *Web* — the builder attaches a =keydown= listener *to its own focusable
+  element* (=tabindex=0=, focused on click). =DUPRE.slideRule= is the precedent:
+  arrows step it, scoped to its own element. The browser's focus system does
+  the arbitration, which is why it doesn't fight the gallery's own global
+  Escape handler.
+- *Emacs* — the SVG region is an image and never sees a keypress, so the mode
+  installs the same table into its keymap and calls =press=. This is why the
+  declaration is a table and not a function over a DOM event: a port that
+  can't read the instrument's intent has to re-derive it, and then the two drift.
+- *waybar* — GTK focus, same shape.
+
+Rules, each of them a bug someone will otherwise ship:
+
+- *Never listen on =document= or =window=.* An instrument that does fights every
+  sibling and the page's own handlers; on the gallery, every keystroke
+  anywhere would type into whichever card bound last.
+- *=preventDefault= only what has a default worth suppressing* — Space scrolls
+  the page, Backspace can navigate back. Nothing else.
+- *Let Tab and Escape bubble.* Tab is how the page is navigable at all, and
+  the gallery's audit stepper owns Escape. An instrument that swallows either
+  breaks something it can't see.
+- *=press= filters, it does not trust.* A handle that appends whatever it is
+  handed will cheerfully append "F1". The table is the allowlist.
+- *Click and key must land in the same place* — both route through =press=, so
+  the two paths cannot drift apart or fire different events.
+
+An instrument with no =KEYS= table takes no keys, which is most of them: the kit is
+click-first and that is what makes it port. Keys are additive, and in Emacs
+they are the *more* native idiom, not the less.
+
+** Style options
+
+Instruments with named style axes take them as constructor opts backed by a
+=STYLES= table on the builder — e.g. =DUPRE.slideToggle(host, {onStyle:'green',
+thumb:'brass'})= with the axes enumerated in =DUPRE.slideToggle.STYLES=, and
+=handle.setStyle(axis, name)= to restyle a live instance. The gallery's
+option chips are demo rigs driving =setStyle=.
+
+** Verification
+
+=tests/gallery-probes/= drives the full kit headlessly over CDP:
+=probe.mjs= (every card renders + responds, size toggle, drags at zoom) and
+=probe-fams.mjs= (screen-family retinting). Run with =node= against the
+gallery file URL; both must pass before a gallery or widgets.js change lands.
+
+* Design tokens (single source, three targets)
+
+[[file:tokens.json][tokens.json]] is the source of truth for the design tokens (palette, amber
+family, glows, pulse rate). [[file:gen_tokens.py][gen_tokens.py]] regenerates all three targets
+(=python3 gen_tokens.py=):
+
+- the =:root= block inside the gallery HTML (web CSS custom properties)
+- [[file:tokens-waybar.css][tokens-waybar.css]] — GTK =@define-color= declarations for the waybar panels
+- [[file:gallery-tokens.el][gallery-tokens.el]] — an elisp alist for svg.el renderers
+
+[[file:gallery-widget.el][gallery-widget.el]] is the Emacs renderer (proof instrument: the needle gauge,
+gallery card 10) — it reads gallery-tokens.el and emits the instrument as SVG via
+svg.el, so the same look renders inside Emacs. Tests:
+=tests/gallery-tokens/= (generator, unittest) and =tests/gallery-widgets/=
+(renderer, ERT), both in =make test-unit=.