svelte-kit-vice/docs/next-features.md

---
title: Next features — initiative registry
type: registry
audience: human + agent
authority: backlog of user-decided future initiatives — records scope, sequencing and dependencies; it does NOT record verdicts (those live in the RFCs / changelog / book-deviations when executed)
status: living — items enter by explicit user decision during audits and sessions; remove an item when it ships (and link where it landed)
created: 2026-07-06
---

# Next features — initiative registry

Rules of this file: one entry per initiative, dated, with its origin (which
audit/session raised it), its scope in one paragraph, and its dependencies.
Entries are **registered, not started** — starting one is a session decision.
Detail lives in the linked doc, never copied here.

## 1. Tonal-ramp contrast parity (measure, then construct) — 2026-07-06 · Stage 1 DONE 2026-07-19 · Stage 2 CLOSED 2026-07-20

> **Stage 1 SHIPPED (2026-07-19).** Measured with `scripts/contrast-audit.ts`
> (33 scales × 2 modes); drift + user verdicts ratified as doctrine in
> [`theming/reference.md §40`](./theming/reference.md) + [`changelog.md §44`](./theming/changelog.md).
> Outcome: `text·11` = secondary tier, `text-strong` = AA-guaranteed; the border
> vocabulary is Radix-subtle by design (only `solid·9` clears 3:1 by
> construction) with a decorative-vs-load-bearing split; the focus ring is a
> config axis (`primitives.focusRing` + `color.focus`, single `outline` per §32)
> whose shipped default is soft — hardening is a config-value choice, kept as-is.
> **Stage 2 CLOSED (2026-07-20) — no solver needed.** The 6 decisions were
> locked (D1 band · D2 measured-pass · D3 flip-only · D4 opt-in · D5 runtime-first
> · D6 now), then **execution disproved the premise**: the template morph does not
> _compute_ text contrast, it **inherits** it (steps 11/12 copy the donor's L-curve
> verbatim; L-driven contrast is ~chroma-invariant under gamut-mapping), so any
> scale generated from a §40-compliant donor library clears the ratified text
> floors **by construction**. Verified on three banks — authored base, leave-one-out
> regeneration, and 45 out-of-distribution seeds — **0 hard-gate failures**
> (min WCAG 9.7:1). The luminance solver would have had nothing to resolve for
> realistic inputs → dropped as speculative. **Delivered instead:** the ratified
> pair table as shared data (`$color` → `CONTRAST_PAIRS`), the audit refactored to
> consume it + a morph-generated regression bank (`scripts/contrast-audit.ts`), and
> a CI guard that locks the inheritance (`eidos/lib/contrast-invariant.test.ts` —
> fails if a future donor/generator breaks it). With D2, the base stays verbatim
> ground-truth; **no base→seeds migration**.
> **Plan + decision + outcome record:**
> [`process/contrast-stage2-plan-2026-07.md`](./process/contrast-stage2-plan-2026-07.md);
> chronicle [`changelog.md §45`](./theming/changelog.md).

**Origin**: A.7 follow-up (theming audit F). The on-solid pair is now computed
at generation with a single criterion ([`rfcs/rfc-color-engine.md`](./rfcs/rfc-color-engine.md)
§8, `eidos/lib/on-solid.ts`). M3 still guarantees more: contrast **by
construction across its whole tonal ramp** (container/on-container pairs at
fixed tone deltas — ΔT 40 ≈ 3:1, ΔT 50 ≈ 4.5:1). Our equivalent promises
(text-11 on bg-2/element-3, border-7 vs bg-2 at the 3:1 non-text floor, text
over composited soft surfaces a2/a3) rest on Radix-style curation, unmeasured.

**Stage 1 — pair-contract verification** (the A.7 pattern generalized): a
canonical table of slot pairs + floors (a user-decided doctrine session),
a measurement pass over pairs × 33 scales × 2 modes at generation
(`on-solid.ts` generalizes; the compositing math exists in `$color`), and the
resulting drift list goes to user verdicts (retune vs annotated exception).
Infrastructure is small; the fallout is the unknown.

**Stage 2 — by-construction generator (CLOSED 2026-07-20, solver dropped).** The
plan proposed a luminance solver that resolves each step to satisfy Stage 1's
pair table for a seed. Execution disproved its premise: the morph **inherits**
text contrast from the donor (steps 11/12 copy the donor's L-curve verbatim;
L-driven contrast is ~chroma-invariant under gamut-mapping), so every scale from
a §40-compliant donor library clears the ratified floors by construction. Measured
across three banks (authored base, leave-one-out regeneration, 45 out-of-distribution
seeds): **0 hard-gate failures, min WCAG 9.7:1.** The solver had nothing to
resolve for realistic inputs → dropped (speculative). What shipped: the pair
table as shared data (`$color` `CONTRAST_PAIRS`), the audit consuming it + a
morph-generated regression bank, and a CI guard (`eidos/lib/contrast-invariant.test.ts`)
that locks the inheritance. The BASE stays verbatim ground-truth (D2); no
base→seeds migration.

**Sequence**: Stage 1 first (it is the spec for Stage 2). No M3-style `on-*`
vocabulary expansion — our slots already encode the pairs; the table
formalizes them without inflating the namespace.

## 2. Per-theme palette-contrast cascade emission — 2026-07-06

**Origin**: A.7 execution. The per-instance `palette-contrast` cascade lives
in the STATIC foundation — one polarity for all themes. Today polarity is
computed per configured theme and unanimous (33/33 scales agree across
base-light/base-dark); on disagreement the `*-light` theme wins
(`computeLightSolidScales`, documented in
[`rfcs/rfc-color-engine.md`](./rfcs/rfc-color-engine.md) §8). **Trigger**: the
day a real configured theme disagrees on a scale's polarity, emit the cascade
per-theme instead of statically. Not before — no speculative machinery.

## 3. Component audit (post-system) — 2026-07-06

**Origin**: user decision during the theming audit — "de momento no tocamos
los componentes, merecen una auditoría adicional una vez que se haya resuelto
estas". Gate: the system-level audit (F/G) closes first. Registered items so
far, to seed its scope:

- **Named-styles adoption by controls** (from A.3): controls/recipes that
  hand-declare typography instead of consuming `--style-*` /
  size-bundle typography — likely by error, to be confirmed per component.
- **Letter-spacing bundle adoption**: ~34 recipes consume `font-size` /
  `line-height` from the size bundle but not `letter-spacing`; plus ~7 raw
  letter-spacing literals in component CSS.
- **Tier-A `data-depth` stamping coverage**: overlays that should stamp their
  plane (dialog / drawer / tooltip / menubar / combobox) per
  [`rfcs/rfc-depth.md`](./rfcs/rfc-depth.md) §5.
- **Calendar family → shared layer/archetype** (user design verdict,
  2026-07-07): the calendar-grid vocabulary (accent set, day geometry, the
  holiday/event marks fixed in audit B.2) becomes a FIRST-CLASS shared layer
  — today the family borrows it informally (measured: range-calendar
  consumes 79 `--calendar-*` tokens, month-grid 65, year-grid 65,
  date-range-picker 38, date-picker 4 — ~250 cross-component borrows), and
  **chronos will draw from it too** when its track lands. Materialization to
  decide at execution: a morfo part-archetype for the day cell (the 26-set
  grows) and/or a `calendar-surface` shared recipe à la list-surface
  (`--list-item-*` precedent). This supersedes "per-component composition
  repairs" for the B.2 borrowers: the marks reach the whole family through
  the shared layer instead.
- **Field family composition — segments under `[data-field]`** (user design
  verdict, 2026-07-07, audit B.1): segment height derives from the SIZE axis
  at the FIELD family level — `field` recipe declares `segment-height` with
  size-scoped declarations (`calc(var(--field-control-height-{k}) -
var(--space-2))`; the TSC `size:` scope axis exists, unused so far), and
  the per-component copies die (each x-field today re-declares the whole
  `height-{xs..xl}` family the field recipe already has). **MANDATED by the
  B.1-(i) verdict**: date/time/color-field MUST incorporate the Field
  wrapper (segments under `[data-field][data-size]` — probed live: today
  they don't) as part of the component audit; the three broken
  per-component `segment-height` tokens and their consumers were removed
  (they had computed `auto` since birth — zero visual change).
- Whatever F/G registers as "component-level adoption gap" in
  `docs/audit/theming-audit.md` when that report lands (deliverable G of the
  2026-07 theming audit).

## 4. `architecture/sema.md` hold-sync — 2026-07-06

**Origin**: A.4/A.5 execution (holds single-source). `SEMA_HOLDS_BY_INTENT`
(`src/uix/sema/holds.ts`) is now THE only hold table (resolver + visual
channel consume it; `sema-map.ts`'s per-family hold column died). The chapter
[`architecture/sema.md`](./architecture/sema.md) still narrates per-family
holds in ~34 places. **Blocked**: the file is the author's WIP (uncommitted
edits) — sync it when the author's pass lands, not before.

## 6. THM-2 rollout — per-instance palette to all surfaces — SHIPPED 2026-07-12; scope boundaries REVERTED by the open-color-cage initiative (2026-07-18/19)

Shipped in `05f0031c` (media-player Batch-4 + 14 surfaces + vocab + 4 props)
and `cc7e9a16` (avatar root). Every per-component palette cascade now collapses
into the shared `--palette-*` layer (size win, behavior-preserving for roles);
the vocabulary gained the alpha `surface`/`surface-hover` + `hover` slots.

> **REVERSED (2026-07-18/19) — "abrir la jaula del color".** THM-2 originally
> kept semantic controls (checkbox/radio/stepper/editable/select/file-upload)
> and `Avatar.Badge` role-restricted "by design". A later user decision reverses
> that: `color` accepts the FULL system (role / intent / 33 scales / raw CSS =
> `ComponentColorProp`) on **every** component, no exceptions — content-ink
> primitives keep their axis as an additive union. Enforced by two guards in
> `recipe-css-contract.test.ts`. Full record + the closed queue (incl. the
> chart SVG resolver and the Card/Avatar custom-color fix):
> [`process/open-color-cage-2026-07.md`](./process/open-color-cage-2026-07.md).
> Only `qr-code` stays out (its `color` is the QR module ink, not a scale).

## 5. Book editorial note — "el hold es suelo, no tijera" — 2026-07-06

**Origin**: A.4/A.5 verdict. The mechanism (hold = floor for the expression,
never a scissor; expression waits animation-finish after the hold, capped by
an absolute `MAX_EXPRESSION_WAIT_MS`, never derived from the hold) is recorded
in [`decisions/book-deviations.md`](./decisions/book-deviations.md) D.12 as a
candidate **editorial appendix** for the book (_Diseñando lo que ocurre_,
HOMOGENEIZADO edition) — the book gives qualitative regions and this is the
materialization doctrine worth feeding back to the source.

## 7. Chat block v2 — 2026-07-18

**Origin**: the `chat-*` v1 initiative (comparative study + plan, session
2026-07-18; user scoped v1 to the room core). v1 shipped `chat-log`
(Feed + end-anchored VirtualList), `chat-message`, `chat-composer`
(Textarea + FileUpload composition) and `chat-typing`, plus the
`$libs/chat` helpers and the VirtualList `anchor: 'end'` extension. The
deferred surface, registered with disposition (each item also lives in its
component README §Gaps):

- ~~**`chat-list`** — the conversation-list pane (rooms, unread badges,
  typing-in-list).~~ **✅ SHIPPED 2026-07-19** — composes `Listbox`
  (single-select + keyboard) with an avatar/title/preview/meta row; unread
  bold + `Badge`, typing-in-list composes `ChatTyping`. Virtualization for
  very long lists deferred (pairs with the VirtualList bidirectional item).
- ~~**`emoji-picker`** — a real picker component (color-picker scale:
  categories, search, skin tones).~~ **✅ SHIPPED 2026-07-21** — composes
  `Popover` + `Command` (search + grid keyboard + combobox/listbox a11y, its
  documented "grid mode") + two `ToggleGroup`s (categories + skin tone). Data is
  the vendored `$libs/emoji` (baked from emojibase, MIT — `scripts/generate-emoji-data.ts`):
  ~1,900 emoji, 316 tone-capable. The grid double-registers Command's
  List/Item so it keeps the a11y but wears its own grid-cell styling. Delegated
  (no own events). Full-grid virtualization + per-emoji tone + image emoji
  (Twemoji/Noto) deferred. The quick-set Popover in `ChatMessage.ReactionAdd`
  stays as the inline tapback bar (different UX).
- **Mention autocomplete (`@`)** — combobox-in-textarea for
  `chat-composer`; pairs with the future `words`/`palabras` integration.
- **Threads UI** — the side-panel composition over the already-shipped
  `Feed.Thread` semantics.
- ~~**Jump-to-message highlight** — `signal-emphasize-target` on
  `chat-message` (the morfo event was deliberately left out of v1).~~
  **✅ SHIPPED 2026-07-19** — `emphasized` prop → `data-emphasized` row flash
  (visual-only, no sema event: reference apps flash silently; the app scrolls
  via a reply's `onJump` then toggles `emphasized` for ~1.4s).
- ~~**Read-by list** — "seen by N" avatar row (Teams/Messenger pattern) on
  `chat-message`.~~ **✅ SHIPPED 2026-07-19** — `ChatMessage.ReadBy` part
  (the app composes `AvatarGroup`; the sender's `onMessageSeen` feeds it).
- **VirtualList chat-mode refinements** — bidirectional sparse ranges for
  jump-into-history far from the loaded window.
- ~~**Typing avatars** — faces next to the `chat-typing` dots (Messenger).~~
  **✅ SHIPPED 2026-07-19** — `ChatTyping.Avatars` slot (compose `AvatarGroup`).
- **Delegate-family ↔ agent chat** — the Aura reservation (§F6 of the
  scene/pack initiative) once agent conversations land.

**Deps**: none to start `chat-list`/`emoji-picker`; mentions depend on the
`words` integration decision. The transport stays app-land (`$connection`).

## 8. `blocks` tier — reusable page-function compositions — 2026-07-21

**Origin**: ecosystem analysis session 2026-07-21; user decision: a new tier
for **blocks** — named compositions of canon components performing a page
function (sticky site header, hero, footer, app shell, docs shell…). Scope:
tier infrastructure (`src/uix/blocks/` + `$blocks`, doctrine at
`architecture/blocks.md`, B contract, `blocks-check` guard), **7 canon base
components first** (`sticky` · `empty-state` · `result` · `callout` ·
`prose` · `anchor-nav` · `sidebar` — full 9-phase route each), then the
block catalog (10 site + 10 app + 3 docs). Admission rule mirrors packs:
any behavior with contract surface is promoted to canon BEFORE the block
composes it. Detail + per-item fiches: the execution plan at
[`process/PLAN-blocks.md`](./process/PLAN-blocks.md).

**Status**: D-BLK decisions SIGNED 2026-07-21 (D-BLK.1 amended by the user:
the tier lives at `src/uix/blocks/`, not `src/blocks/`). **F0 SHIPPED
2026-07-21** (`069759604`: doctrine + `$blocks` + `blocks:check` + gallery).
**Reference study SHIPPED 2026-07-21** (`aff42fee0`:
[`process/RESEARCH-blocks-references.md`](./process/RESEARCH-blocks-references.md),
6 research tracks; every phase-0 now checks against it). Amendments E-1…E-5
SIGNED 2026-07-21: F1 = **8** canon components (+`nav-tree`, data-driven docs
navigation tree); parity-floor = v1 scope policy; F2 = **14** site blocks
(+banner · team · contact · content-section); distribution registered as §9;
⌘K stays app-land.

**F3 STARTED 2026-08-19** — `app-shell` shipped with a signed phase 0 (four
decisions: the block wires no services, two scroll models by prop, the top bar
inside the inset, generated bypass links) and a new canon component in front of
it, `SkipLink` (WCAG 2.4.1). It closes ledger row **A-95**, the one thing the
tier could not fix from inside any block: with the shell owning the page's
heights, an in-flow notice and a pinned header overlap by **0px** (measured;
before: 49px, with the hit test landing on the strip).

**Deps**: `scheduler` block gated on `chronos` landing; chat-room block
explicitly NOT here (canon `chat-*` family, §7 above).

## 9. Blocks distribution — registry + llms.txt + MCP — 2026-07-21

**Origin**: the blocks reference study (E-4 signed 2026-07-21; dossier
[`process/RESEARCH-blocks-references.md`](./process/RESEARCH-blocks-references.md)
§P6). The ecosystem's 2026 table stakes for component/block distribution are
agent-enumerable catalogs: a registry protocol (shadcn `registry.json` /
`registry-item.json`), `llms.txt` (+ `llms-full.txt` / `.md` content
negotiation) over the docs corpus, and an MCP server so agents can list and
install blocks (sv-blocks precedent). Scope when started: (a) `llms.txt`
generation from the docs corpus (cheap — the corpus is already Markdown,
pairs with F4 docs blocks); (b) a blocks/components registry manifest; (c)
an MCP server exposing catalog + morfo contracts (pairs with the
contract-introspection superation angle and the palabras F-B agentive
track). Registered, not started.

**Deps**: F2 catalog existing (something to distribute); F4.3 props-table
work shares the morfo-introspection substrate.

## 10. Barcode — deferred symbologies + GS1 profiles — 2026-07-29

**Origin**: the `Barcode` component (shipped 2026-07-29; design record +
dispositions in
[`eidos/components/barcode/README.md`](../src/uix/eidos/components/barcode/README.md)
§Gaps). v1 covers the Retail + Logistics set — Code 128 (A/B/C auto), EAN-13/8,
UPC-A/E, Code 39, ITF/ITF-14 — from their published ISO standards, in the
zero-dependency `$libs/barcode` encoder.

**Shipped the same day, out of this registry: the ISBN input profile.** An ISBN
barcode IS an EAN-13 (ISO 2108, Bookland 978/979), so it entered as a profile
over `ean13` — separators tolerated in the numeric symbologies, ISBN-10 read and
converted after validating its own base-11 check digit — and explicitly NOT as a
ninth `symbology` value, which would make `data-symbology` claim a standard that
does not exist. The doctrine is recorded in the component README §ISBN.

Four dispositions stay **diferir**, each a self-contained follow-up over the
same encoder:

- **Codabar · MSI · Pharmacode** — the niche tail JsBarcode still ships. Pure
  table work: each is a symbology module + its vectors.
- **GS1-128 (FNC1 + Application Identifier parsing)** — a _profile_ of Code 128,
  not a new encoder: the FNC1 code value plus an AI grammar so the HRI can print
  the bracketed form. The natural pair for a logistics-facing app, and the same
  shape the ISBN profile already established.
- **EAN-2 / EAN-5 add-ons + the upper `ISBN 978-…` line** — the periodical /
  book supplements and the book-cover convention; they extend the EAN geometry
  (a second text band, a composed add-on symbol) rather than replacing it. Hard
  constraint recorded with them: **we do not hyphenate**. The hyphen positions
  are not computable from the number — they need the International ISBN
  Agency's prefix-range tables, versioned data with an expiry date, which is a
  maintenance clock a zero-dependency library must not swallow. The hyphenated
  string comes from the consumer's catalogue.
- **2D — DataMatrix · PDF417 · Aztec** — explicitly NOT this component: each is a
  whole different encoder (own Reed–Solomon, matrix layout). They belong beside
  `QrCode` as their own components, sharing the display-primitive shape.

**Deps**: none — the encoder's `BarcodeResult` (module lattice + guards + HRI
groups in module space) already generalises; the 2D entries would instead reuse
the `$libs/qr` shape.

## 11. Background — parallax, the scrim scale, and the pack seam — 2026-08-18

**Origin**: the `Background` component (design record, measurements and
dispositions in
[`eidos/components/background/README.md`](../src/uix/eidos/components/background/README.md);
plan and signed decisions in
[`process/PLAN-background.md`](./process/PLAN-background.md)). It ships as the
HOST of a surface's background layers — a child that pins itself behind its
parent's content, with the parent adopted by a foundation rule rather than
wrapped. Patterns, gradients, scrims, images and video are in; so is the WCAG
2.2.2 pause control.

**Scope of this registry entry** — what the component deliberately does NOT own
yet, each a self-contained follow-up:

- **Parallax and the scroll seam** — `animation-timeline: view()` with a
  `ScrollProgress` fallback, `attach='fixed'`, the pointer `depth` axis. The
  infrastructure landed with the component (`$adom`'s `ScrollProgress` and
  `prefersReducedData`); the layers that consume it did not. It is the one
  follow-up with a mechanism already chosen and measured against browser
  support, so it is also the one most likely to move first.
- **The scrim `strength` scale is not ordered by weight** — measured: `subtle`
  veils MORE than `overlay`, and `overlay` and `muted` resolve to the same
  number. The names come from the semantic opacity scale, which says how opaque
  an ELEMENT is; borrowing them for a VEIL imports an ordering that means
  something else. Renaming or renumbering is an API change, not a fix in
  passing.
- **A bright photograph is illegible at every scrim weight** — white copy over
  the heaviest veil measures below AA. Either the scale gains a step above
  `--opacity-subtle`, or the doctrine becomes "the answer is a graded scrim",
  stated once and demonstrated.
- **A shared `<video>` state port** — the framework has a load-state contract
  for `<img>` (`ImageProvider` in `soma/layers`) and none for `<video>`:
  `ScrollFrames` listens by hand and so does `Background.Video`. Two consumers
  is the threshold this codebase uses to extract a layer.
- **The `Ambient` pack honouring the pause** — the canon publishes the context
  (`paused`, `reduced`, `seen`); the pack reads it. A task OF the pack, because
  the dependency runs pack → framework and never back.

**Deps**: the parallax entry needs no new service — the two `$adom` ports it
consumes already shipped. The scrim entries are the author's call on the token
vocabulary, so they block on a decision, not on code.