The developer decided on 8 Nov 2026, after trying the variants on the
phone: the wave in the colour of the screen in view, without Material's
ripple, the indicator kept and there at once, a 1.2 s wave, top corners
of 20 dp, the bar's own neutral surface. Learn's bar stays cobalt, the
colour its tabs wash in, rather than its icon's purple.
So the bar has one look: FlushNavigationBar.waveDuration and
cornerRadius are constants, and the debug section goes from the four
Settings screens with what it switched (NavigationBarDebugSection,
debugNavigationBarStyle, effectiveNavigationBarStyle, the style record
and the variants A, C and F, the speeds, the corners and the tinted
surface). Their tests go too; those stating the look kept stay. Learn's
sign-out helper no longer has to scroll past the section.
ADR 0030's amendment of D60, the halkyon_ui README and Learn's
AGENTS.md record the decision and the alternatives set aside.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
The developer's review of 8 Nov 2026: the bar follows the screen in view
rather than one colour per app, so a Todo project of its own colour gives
the bar that colour while it shows. The wave, the chosen destination's
icon and label and its indicator take ScreenTint.color, the colour the
screen in view claims through its TopGradient; the frame's accent, the
app's colour, stays only for the moment before any screen claims one,
since ScreenTint itself starts at cobalt, which would be wrong for Todo,
Train and Meditate. Learn's tabs claim cobalt, their wash, so its bar is
cobalt there now, not purple.
A colour changing on the same tab (a project opening) passes into the
next over 300 ms, at once with animations off. A wave paints in that
colour as it goes: it starts in the colour of the screen being left, as
the arriving one claims its own only once it shows, a frame later, and
passes into it with the rest of the bar.
A person's colours may be light, so the chosen destination's colour is
made legible (readableTone, halkyon_ui): a palette colour starts from its
own text tone as Todo's dates take it (its outline in light mode, its
fill in dark), any other colour from itself, then darkens towards black
in light mode and lightens towards white in dark, only until it reads at
4.5:1 on the bar and on its indicator. Every palette colour is tested in
both themes, on the neutral and the tinted surface. This also lifts
Learn's label, which read at about 3:1.
The debug section gains Bar surface, neutral or tinted: tinted mixes 6 %
of the screen's colour into the bar's own surface in light mode and 8 %
in dark, changing with it. Neutral by default, and in the shipping style.
Whats-New: The navigation bar takes the colour of the screen you're on, such as a project's own.
Whats-New-De: Die Navigationsleiste nimmt die Farbe des Bildschirms an, auf dem du bist, etwa die eines Projekts.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
The developer's choice of 7 Nov 2026 (the mockup's variant E): a tap on
another destination sends a radial glow in the app's colour over the bar
from that destination's centre, solid to 35 % of its radius and gone at
70 %, growing to cover the bar (cubic(.2, .7, .2, 1)) while it fades from
half its strength in dark mode and a third in light, over 1.2 s, behind
the destinations and clipped to the bar. None for the destination already
chosen, none with animations off, and none for a tab changed without a
tap (a link, back): the wave answers the finger. The destination chosen
takes the app's colour, its indicator tinted 22 % with it, without
Material's ripple or the indicator growing; the bar's top corners are
rounded, 20 dp, the screen showing through them.
Each app gives the frame its colour (NavigationFrame's accent, from
PaletteColor): Learn's purple, its icon's last colour, Todo's strawberry,
Train's carrot and Meditate's fern, their screens' wash.
For trying it on a phone, a debug build's Settings has a section
Navigation bar (debug), halkyon_ui's NavigationBarDebugSection, switching
live, in memory alone: the variant (A Material only, C the wave with
Material's fill, E without it, F without the indicator too), the wave's
time (0.7 to 2 s) and the corners (0 to 28 dp). Release builds never read
it and show shippingNavigationBarStyle, the debug section's start: to
remove it, delete the section from the four Settings screens and
debugNavigationBarStyle, and let effectiveNavigationBarStyle return the
shipping style.
Whats-New: Tapping a tab sends a soft wave in the app's colour across the navigation bar, now with rounded corners.
Whats-New-De: Ein Tipp auf einen Tab schickt eine sanfte Welle in der Farbe der App über die Navigationsleiste, jetzt mit abgerundeten Ecken.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
