Plan canvas (owner report: arrows clipped at the viewBox edge in dist —
measured 14px/20px cuts in the owner's real plans): blockLayout now
unions node boxes with every edge path's control-point hull (a bezier
never leaves it; the layout calls edgePathD with the renderer's exact
inputs). Dagre's node extent stays the floor, so ordinary plans render
byte-identical; the viewBox origin shifts only when ink bulges past
zero. Verified on both real chats; pins use the owner's real
linear-algebra tree (golden-real-data).
Keyboard-first (owner's law: Enter always submits, arrows always cycle;
text fields the only exception):
- Enter guard split (enter-submits): a focused BUTTON keeps native
Enter only when keyboard-walked (:focus-visible) or inside an open
overlay (menus/dialogs); pointer-clicked transcript buttons submit,
preventDefault suppressing the re-activation underneath.
- Focus hygiene (focus-hygiene): pointer clicks on transient controls
(agent/user thinking toggles, copy, mermaid expand, plan chip) blur
to body — the state clicking empty space produces.
- Session search owns the walk: Up/Down wrap-cycle the filtered rows,
Enter opens the walked row or the first match (quick-open), then
blurs and keeps the query. The Alt-arrow session cycle is RETIRED.
- Registry: model-menu walk/pick entries removed (obvious in-field
navigation, not settings material); question-dock keys stay
displayOnly per owner ruling.
Gates: 1489/1489, typecheck, lint. Verified live end-to-end.
Blockquotes: the callout override had displaced Streamdown's own styled
blockquote component, so plain quotes rendered as bare unstyled text
since that commit. The pass-through branch now restores Streamdown's
verbatim classes (border-l-4, muted italic).
Explanations tucked for ALL questions (owner): the prediction's Why /
Hide-why toggle is universal — every quiz answered card sits its
explanation behind the same collapsed button. Same pattern, one law.
The thinking row's rhythm: my-1 -> my-3. The 4px margin hugged the
options on non-graded answered cards (owner report); 12px matches the
card's mt-2/mt-3 spacing grammar everywhere the row renders.
Side-based authorship (owner round, 2026-10-07): the document shape
blurred user into agent — three left-rail idioms (user text, user
thinking, quoted prose) collided once quotes rendered. User rows go
RIGHT: 'You' messages and practice thinking cards hug the right edge at
85% width with the rail mirrored (border-r), text still reading
left-to-right. In-card thinking (inside the answered card, the agent's
context) stays left. Transcript thinking rows arrive EXPANDED — the
thinking was clearly sent. Cmd+T (toggle-user-thinking, chat scope,
cheat-sheet row) sets every user-thinking row to one state via a module
store: explicit sets stomp individual toggles, late mounts honor the
last set (the state initializer reads the store, so static render
reflects it too).
Root cause (interlude, owner 2026-09-25): keyboard-shortcuts dispatches
registry actions on the lh:kbd-<action> convention, but the sidebar's
listener sat on the pre-convention name "lh:toggle-sidebar" — a name
nothing ever dispatches, so ⌘B silently did nothing while its tooltip
and cheat-sheet row kept claiming the binding. A sweep of every lh:
listener confirmed the sidebar was the lone stray (chat-renamed and
graph-revision are deliberate non-kbd events).
Fix, structural: kbdEventForAction(action) exported from
src/core/keyboard.ts — the ONE spelling — and both sides compose
through it (dispatcher's default branch, sidebar's toggle listener);
keyboard-shortcuts re-exports the helper so the contract pin can assert
no second spelling exists. The mismatch is now impossible by
construction.
Thinking pill: label trimmed to "Thinking" with its real shortcut via
the registry-composition path — "Thinking (⇧⇥)" (cycle-thinking,
rebind-live like every Hint suffix).
Pins (tests/keyboard-toggle-sidebar.test.ts): the full chain — mod+b →
actionForBinding → toggle-sidebar → kbdEventForAction →
lh:kbd-toggle-sidebar; formatBinding("shift+tab") → ⇧⇥; the
dispatcher-imports-the-same-helper contract.
Live-verified on :3001: ⌘B visually toggles on home, /chat/[id], and
/chat/new (sidebar 0↔288px, hamburger slot 0↔36); with the rebind
lh:keymap {"toggle-sidebar":"mod+j"}: ⌘J toggles and ⌘B is inert
(rebind-live); thinking pill renders "Thinking (⇧⇥)"; keymap restored,
sidebar left open.
The validation surface for the settings foundation — deliberately thin,
real read/write against the delta record, polish is a later wave.
Mount (owner decisions): dedicated page, single scroll; entry = sidebar
bottom row + ⌘/Ctrl+, (open-settings in the registry); chat defaults NOT
shown (they live on /chat/new); mode dark-only (light palette = design
wave); final tool list = research/demo/visual/pdf (master-adjudicated).
Sections (PUT /api/settings/[section], replace-whole per section):
- General: auto-update toggle.
- Agent: six background-role model+thinking selects (Default = config
pin; a stored id stays VISIBLE even when the catalog hasn't loaded or
dropped it — a select showing Default over a live override would lie),
the four tool toggles, prompt override switches (file-gated) with
source/override text editors over the segment routes.
- Appearance: applied LIVE as runtime CSS variables by an
AppearanceProvider at the root layout — proseFontSize → the one
reading-size var, fontFamily → --font-prose, background → --background
+ the derived raised/accent/edge palette (dark curve, today's exact
spacing: +8/+22/+47 per channel, clamped), sessionNameSerif →
--font-title (titles flip with ZERO chat.tsx edits), headingWeight →
new --lh-heading-weight token, bold/italic colors → the lh-ink vars.
Mode renders honestly DISABLED.
- Graph: the ladder grays a rung when any ANCESTOR is effectively off
(stored values persist, resolve inert — switch shows stored, graying
shows effective).
- Keyboard: view/rebind/reset over the registry; overrides persist in
lh:keymap and apply INSTANTLY (dispatcher reads per keydown); bare
modifier presses are ignored while armed; displayOnly actions list but
never rebind.
First-boot fix: {settings: null} is no-record, not fetch-failure.
CROSS-LANE (flagged for master): src/core/keyboard.ts gained the
open-settings action/binding and exports saveOverrides/loadOverrides
(one-liners; no existing pins); app/layout.tsx mounts the provider.
Live-verified: structure, record writes (general/tools/graph/appearance),
prose-size applying live (16→20px), rebind + chord navigation from
another page, ladder graying, no console errors. Gates: typecheck,
lint, 689/689 (28 new), build.
Owner polish pair before the settings milestone:
- Model menu: arrows walk the filtered results (clamped, no wrap) while
focus stays in the search field; Enter picks the walked row or, with no
walk yet, the first result; typing resets the walk; click and Enter
share one pickModel path; walked row gets a muted ring + scrollIntoView;
cheat-sheet display entries added.
- Graph: window resizes re-anchor the camera so the world point under the
pre-resize viewport center stays under the new center — the graph stays
visually still while scaling (was top-left pinned). viewW/H tracked in
syncSize; re-anchor applied through the zoom behavior (persistence and
card-dismiss unchanged); kFit refresh as before. Pixel-verified: 7/7
center samples identical across a 300x200 shrink.
Owner live-test rounds on waves A/B:
- Alt+arrows no longer ALSO walk the question rows (dock ignores
alt/meta/ctrl combos; session cycling keeps them exclusively)
- question walk clamps at the ends — no wrap (faster to navigate)
- plain Tab toggles focus between the thinking field and the answer
rows (walked row by default); focus follows the walk while in the
rows; Shift+Tab stays the global thinking-level cycle
- Esc in the sessions search blurs back to normal (claims the key so
the window Esc chain does not fire)
- cheat sheet gains the Tab-in-question display entry
The shortcut architecture (owner-approved plan, 2026-09-17):
- src/keyboard.ts: pure action registry (id, label, scope, default
binding) + lh:keymap localStorage overrides + event normalization.
The settings milestone renders this same registry as its editor.
- components/keyboard-shortcuts.tsx: the single document-level keydown
listener (window level, bubble) owning the pieces no surface owns:
- Tab is DEAD (owner decision): browser tab-focus navigation is
abandoned; Tab is suppressed everywhere, Shift+Tab cycles the
thinking level.
- Esc is a layered dismiss: topmost popover first (popovers
stopPropagation their own Esc — usePopoverDismiss + ModelControl),
then dictation stop (lh:kbd-stop-dictation), then abort of an
in-flight turn (lh:kbd-abort-turn; server-side wake turns are
honestly non-stoppable — the seam only stops local streams).
- Global actions dispatch lh:kbd-<action> window events (the
lh:chat-renamed pattern); surfaces that aren't mounted simply
don't listen.
- The input guard: inside a typing surface only mod/alt combos (and
Tab) fire; bare keys pass through to the field.
- Cheat sheet overlay (?) renders from the registry, grouped by scope.
Bindings wired this wave: cmd+d dictation toggle, cmd+k model picker,
shift+tab thinking cycle, cmd+b sidebar, cmd+shift+f sessions search,
alt+up/down + alt+enter session cycling, cmd+g graph view, cmd+n new
session, f2 rename (chat), ? cheat sheet. Wave B adds the question
keyboard machine; wave C the per-surface bindings (find, import).
Verified live in the dev shell (CDP): all of the above via
Input.dispatchKeyEvent.
Co-Authored-By: Claude Fable 4.5 plus-plus <noreply@anthropic.com>
amosblomqvist