Types

Every TypeScript symbol this documentation site's own lib/ exports, with a page of its own for each type and interface.

How this is generated

Source: the export declarations under apps/www/lib/, read from the TypeScript sources themselves. There is no published .d.ts behind this table and there will not be one: opsinjs is distributed by copying source into your own repository rather than as an npm package, which is decision 0002. Script: scripts/build-reference.mts, which scans declaration lines textually rather than through fumadocs-typescript. The reason is the one that makes the props tables textual too: a reference generator has to run before anything compiles and produce identical bytes on every machine. Command: pnpm run generate.

Read this table as the site's own vocabulary, not as an installable API. Every row below is a symbol of this documentation site. The table covers the routing helpers, the colour maths, and the catalogue and status models the pages are rendered from. That is worth publishing, because the status ladder, the category set and the colour derivation are defined here and are the same definitions the doctrine pages describe in prose. It is not, however, anything you can install: an import from @opsinjs/… will not resolve, and what a consumer actually receives is component source copied in from the registry, whose props are documented on each component's own page rather than here.

This page is an index. Types and interfaces also get a page of their own under API, at reference/api/<Symbol>, because a type name in prose should be a link to a page and not an anchor two thousand words down a single document. Functions and constants are listed here only, because a page per STATUS_META would be a page of nothing. The index carries the summary; the symbol page carries the declaration line and the file it was read from.

Four columns. Symbol is the exported identifier, exactly as it is written in the source. Kind is what the declaration is, so const, function, type or interface. Declared in is the file it lives in, relative to apps/www. Summary is the first sentence of its doc comment, which means the way to improve this page is to improve the comment; a row whose summary reads - is a symbol nobody has written one for yet.

Two symbols are load-bearing and are worth knowing before you read anything else. ClinicalStatus is the union of the four clinical status levels, and it is the type that makes the never-mix rule checkable rather than merely written down. HealthCategory is the union of the subject categories. Every component that takes one takes it as a prop of that type, so a mixed pair is a compile error and not a design review finding. Both are specified in Clinical status semantics and Category identity; their declarations are on ClinicalStatus and HealthCategory.

What is deliberately excluded. Everything under lib/generated/, because a generated module is documented by the page that generates it rather than twice over. Anything whose name begins with an underscore. And everything outside lib/: component props are extracted separately from registry/bases/base/*.tsx and render as the props table on each component page. A symbol appears under the file whose export line declares it, so the shared substrate a copied component carries with it is listed under lib/opsinjs.ts and the clinical vocabulary it re-exports is listed under lib/status.ts, once each.

Exported symbols

Symbol	Kind	Declared in	Summary
`absoluteUrl`	function	`lib/routes.ts`	Turn a root-relative path into a full URL on the canonical origin.
`accessibilityPath`	function	`lib/routes.ts`	-
`agentRoutes`	const	`lib/routes.ts`	-
`aliasesFor`	function	`lib/catalogue.ts`	The exact array a page's `aliases` frontmatter must contain.
`aliasIndex`	function	`lib/catalogue.ts`	alias → the id or page it resolves to. Lower-cased, because a reader typing "Blood Pressure" and a reader typing "blood pressure" want the same page.
`AliasProblem`	interface	`lib/catalogue.ts`	One search synonym that cannot be used, either because two components claim it or because it collides with a component id.
`apca`	const	`lib/color/apca.ts`	The short name, for callers that just want the number: `apca("#333", "#fff")`. Identical to `apcaContrast`.
`APCA_FLOOR`	const	`lib/color/apca.ts`	The published opsinjs APCA floor. These are the system's own commitments, chosen a little above the bare minimum because the audience is reading a number that matters to them on a phone, outdoors, often over 60.
`apcaContrast`	function	`lib/color/apca.ts`	Lc for text on a background. Positive means dark-on-light, negative means light-on-dark, and the two arguments are not interchangeable.
`apcaContrastOklch`	function	`lib/color/apca.ts`	The same, taking OKLCH. Both colours are clamped into sRGB first, because that is what a screen shows.
`apcaVerdict`	function	`lib/color/apca.ts`	-
`ApcaVerdict`	interface	`lib/color/apca.ts`	The result of one APCA measurement, with the signed Lc, its polarity, the floor for that use, and how far above or below the floor it landed.
`apiRoutes`	const	`lib/routes.ts`	-
`apiSymbolPath`	function	`lib/routes.ts`	A generated per-symbol API page. `\<ApiLink\>` resolves here, never to an anchor.
`axisConflict`	function	`lib/status.ts`	THE NEVER-MIX RULE, as a function.
`AxisConflict`	interface	`lib/status.ts`	A refusal. It is what the system answers when a measurement category and a clinical status are asked to share one surface.
`BANNED_WORDS`	const	`lib/opsinjs.ts`	Words a component's copy must not use, with the replacement and the reason. Generated from `tokens/glossary.json`.
`baseOptions`	function	`lib/layout.shared.tsx`	THERE IS NO TOP NAVIGATION, AND THAT IS THE POINT.
`baseStyleQuery`	function	`lib/routes.ts`	The `?base=&style=` query a docs page uses for the same switch. Returns an empty string at the defaults so the canonical URL stays clean.
`builtComponentCount`	function	`lib/registry.ts`	How many distinct components have a real renderable behind them.
`byNamespace`	function	`lib/tokens.ts`	-
`byTier`	function	`lib/tokens.ts`	-
`CatalogueIndexRow`	interface	`lib/catalogue.ts`	One component as the light registry index publishes it, flattened to the fields a decision to install actually turns on.
`CATEGORY_GATED_SECTIONS`	const	`lib/status.ts`	Sections whose presence depends on the component's category rather than on its status. Required when `category` starts with the prefix, and forbidden when it does not.
`CHROMA_ENVELOPE`	const	`lib/color/derive.ts`	Chroma as a fraction of the seed's, per step. Mirrors `chromaEnvelope` in tokens/color.json.
`CHROMA_STEP`	const	`lib/preset.ts`	The quantisation of chroma: 0.005 per step, so 63 steps reach 0.315.
`clampToGamut`	function	`lib/color/oklch.ts`	Bring a colour into gamut by reducing chroma only.
`CLINICAL_STATUS_META`	const	`lib/status.ts`	-
`CLINICAL_STATUSES`	const	`lib/status.ts`	-
`ClinicalStatus`	type	`lib/status.ts`	What a reading means and what, if anything, to do about it.
`ClinicalStatusMeta`	interface	`lib/status.ts`	Everything a clinical status carries besides its colour. The word, the example sentence, who may assign it, its icon and its place in the order.
`ClinicalStatusOrUnknown`	type	`lib/status.ts`	The four clinical statuses plus `unknown`. Unknown is the absence of an assertion rather than a fifth level of urgency.
`cn`	function	`lib/utils.ts`	Join and de-duplicate class names, resolving Tailwind conflicts last-wins.
`COLLAPSE_THRESHOLD`	const	`lib/color/cvd.ts`	The minimum Lc at which two swatches shown side by side are still telling two different colours apart.
`ColorInput`	type	`lib/color/apca.ts`	Anything the contrast functions accept: an sRGB triple, an OKLCH object, or a CSS colour string (`#0b6bcb`, `oklch(0.62 0.17 15)`, `rgb(11 107 203)`).
`COMPONENT_OPTIONAL_SECTIONS`	const	`lib/status.ts`	The sections a component page may leave out.
`COMPONENT_SECTIONS_BY_STATUS`	const	`lib/status.ts`	THE COMPONENT PAGE ANATOMY, status-gated.
`componentPath`	function	`lib/routes.ts`	A component specification page, by catalogue id.
`componentRequiredSections`	function	`lib/status.ts`	The sections a component page at this status and category must actually carry: the outline above with the optional five taken out. This is what an enforcer reports as missing, and it is deliberately a filter over `componentSections()` rather than a second hand-written table, so the two can never name a heading the other does not.
`componentSections`	function	`lib/status.ts`	The full ordered outline for a component page at a given status and category: the canonical order, and the set of headings the page is allowed to carry. Some of what comes back is optional, so do not use this as the missing-heading check. `componentRequiredSections()` is that.
`compositeOver`	function	`lib/color/oklch.ts`	Composite a translucent `foreground` at `alpha` over an opaque `backdrop`, source-over, and return the opaque colour a reader actually sees.
`CONTRAST_USE_LABELS`	const	`lib/color/apca.ts`	-
`ContrastCheck`	interface	`lib/color/derive.ts`	One measured pair from a derived theme, carrying both the APCA Lc and the WCAG ratio, the use that fixes the floor, and whether it passed.
`contrastRatio`	function	`lib/color/wcag.ts`	The contrast ratio, from 1 (identical) to 21 (black on white).
`contrastRatioOklch`	function	`lib/color/wcag.ts`	-
`ContrastUse`	type	`lib/color/apca.ts`	What a pair is being used for. Determines which floor applies.
`convertUnit`	function	`lib/opsinjs.ts`	One value in another unit, or `undefined` when this system does not own the factor.
`CORNER_SHAPE_VALUES`	const	`lib/preset.ts`	-
`CVD_LABELS`	const	`lib/color/cvd.ts`	-
`CVD_TYPES`	const	`lib/color/cvd.ts`	-
`CvdCollision`	interface	`lib/color/cvd.ts`	Two colours that stop being distinguishable under one kind of colour vision deficiency, and the Lc left between them once simulated.
`CvdType`	type	`lib/color/cvd.ts`	The three dichromacies, plus the achromatic check every specimen must also survive.
`DataState`	type	`lib/opsinjs.ts`	The state a data surface is in, named once so the surfaces converge on one vocabulary, though no component accepts it yet.
`DecodeError`	type	`lib/preset.ts`	Why a preset code could not be read. The five reasons are kept distinct so that the sentence shown to a person can be a specific one.
`decodePreset`	function	`lib/preset.ts`	Decode a preset code.
`DecodeResult`	interface	`lib/preset.ts`	The outcome of reading a preset code. Either the preset and its version, or an error and a sentence a person can act on.
`decodeTransfer`	function	`lib/color/oklch.ts`	sRGB gamma-encoded channel → light-linear. Also used for Display-P3, which shares sRGB's transfer curve.
`DEFAULT_BASE`	const	`lib/registry.ts`	-
`DEFAULT_BASE`	const	`lib/routes.ts`	-
`DEFAULT_PRESET`	const	`lib/preset.ts`	-
`DEFAULT_STYLE`	const	`lib/registry.ts`	-
`DEFAULT_STYLE`	const	`lib/routes.ts`	-
`DENSITY_VALUES`	const	`lib/preset.ts`	-
`deprecatedTokens`	function	`lib/tokens.ts`	-
`DerivedTheme`	interface	`lib/color/derive.ts`	Everything derivation produces from one brand colour. Both ramps, every role in light and dark, the contrast checks, the warnings, and whether it is sound.
`DeriveOptions`	interface	`lib/color/derive.ts`	The knobs on theme derivation. Every one of them has a default, so a brand colour on its own is already a complete input.
`deriveRamp`	function	`lib/color/derive.ts`	Build one ramp from a seed, clamping to sRGB and recording the P3 enhancement.
`deriveTheme`	function	`lib/color/derive.ts`	Derive a complete, contrast-validated theme from one brand colour.
`DeriveWarning`	interface	`lib/color/derive.ts`	One thing the derivation has to say about a theme, as a level, a stable code and a message.
`Detent`	type	`lib/opsinjs.ts`	How far a sheet is open.
`displayP3ToOklch`	function	`lib/color/oklch.ts`	Gamma-encoded Display-P3, 0 to 1 per channel → OKLCH.
`DOCS_BASE`	const	`lib/routes.ts`	The docs base segment. Everything else derives from it.
`docsMarkdownPath`	function	`lib/routes.ts`	The same page as processed markdown: `/components/range-bar.md`.
`docsPath`	function	`lib/routes.ts`	The URL of a docs page from its slug segments. `docsPath()` is the docs index. This is the function a locale segment would be inserted into.
`doctrinePath`	function	`lib/routes.ts`	A doctrine page reference as written in frontmatter, such as `two-colour-axes`, or `foundations/colour/contrast-and-apca` when it is not in Health.
`editUrl`	function	`lib/routes.ts`	"Edit this page" on GitHub, from a source file path relative to the content root.
`encodePreset`	function	`lib/preset.ts`	Encode a theme as a preset code.
`encodeTransfer`	function	`lib/color/oklch.ts`	Light-linear channel → gamma-encoded.
`EXAMPLE_SOURCE`	const	`lib/opsinjs.ts`	The only citation an opsinjs example, demo or preview may carry.
`explainUnresolved`	function	`lib/registry.ts`	Explain an empty lookup.
`findAliasProblems`	function	`lib/catalogue.ts`	The uniqueness check, as a function rather than as a comment.
`findByAlias`	function	`lib/catalogue.ts`	-
`findCollisions`	function	`lib/color/cvd.ts`	Check that a set of named colours stays mutually distinguishable under every simulation. This is the function that turns "status must survive grayscale" from doctrine into a build step.
`findUnit`	function	`lib/opsinjs.ts`	The unit a symbol names, or `undefined` when this system has never heard of it.
`fit`	function	`lib/color/derive.ts`	Fit an arbitrary colour into the shipped gamut without moving its hue or lightness.
`FLOOR_VALUES`	const	`lib/preset.ts`	Which APCA floor the theme is validated against. `standard` is the published one.
`FORMAT_VERSION`	const	`lib/preset.ts`	Bump this, and add a decode branch, whenever a field changes shape.
`formatDisplayP3`	function	`lib/color/oklch.ts`	`color(display-p3 0.9 0.2 0.3)`. Channels are clamped, because this is an output format.
`formatHex`	function	`lib/color/oklch.ts`	`#rrggbb`, clamped into sRGB.
`formatOklch`	function	`lib/color/oklch.ts`	`oklch(0.622 0.17 15)`, or with an alpha, `oklch(0.622 0.17 15 / 0.5)`.
`formatRatio`	function	`lib/color/wcag.ts`	Ratios are conventionally quoted to one decimal place and rounded DOWN, so a published figure is never better than the measurement.
`formatToken`	function	`lib/tokens.ts`	Render a token in one of the copyable formats.
`foundationsPath`	function	`lib/routes.ts`	-
`Gamut`	type	`lib/color/oklch.ts`	The colour spaces this module can express a colour in.
`GAMUT_EPSILON`	const	`lib/color/oklch.ts`	The tolerance a channel may exceed 0 or 1 by and still count as in gamut. Half a unit at 8-bit precision: a value that rounds to a representable channel is in gamut for every purpose this system has.
`GAMUT_VALUES`	const	`lib/preset.ts`	-
`GeneratedBannedWord`	interface	`lib/opsinjs.ts`	One banned word: the word a component's copy must not use, what to write in its place, and why the word is barred.
`getAllPages`	function	`lib/source.ts`	Every page in the corpus. The input to the sitemap, llms.txt and the shards.
`getByCategory`	function	`lib/catalogue.ts`	-
`getByStatus`	function	`lib/catalogue.ts`	-
`getCatalogue`	function	`lib/catalogue.ts`	Every row.
`getEntry`	function	`lib/catalogue.ts`	-
`getPage`	function	`lib/source.ts`	One page by its slug segments, or undefined.
`getPagesInSection`	function	`lib/source.ts`	Pages under one top-level section, in tree order.
`getPageTree`	function	`lib/source.ts`	The page tree the docs layout renders.
`getRegistryEntry`	function	`lib/registry.ts`	Resolve one entry, or null.
`getShipped`	function	`lib/catalogue.ts`	Every catalogue row. Not a claim about code. Read `implemented` in `/r/index.json`, or `toIndexRow`'s `isBuilt` argument, for that.
`getToken`	function	`lib/tokens.ts`	-
`getTokens`	function	`lib/tokens.ts`	-
`grouped`	function	`lib/tokens.ts`	Tokens grouped for a table: namespace → group → tokens, in emit order.
`groupedByCategory`	function	`lib/catalogue.ts`	Every category that has at least one row, in the declared order, with its rows.
`hasComponentPage`	function	`lib/catalogue.ts`	True when `/docs/components/\<id\>` resolves to a page.
`HEALTH_CATEGORIES`	const	`lib/status.ts`	-
`HEALTH_CATEGORY_LABELS`	const	`lib/status.ts`	-
`HealthCategory`	type	`lib/status.ts`	What a reading is ABOUT. Identity, never verdict.
`healthPath`	function	`lib/routes.ts`	A health doctrine page, by the page id that `governedBy` and `implements` use.
`inGamut`	function	`lib/color/oklch.ts`	-
`isBuilt`	function	`lib/registry.ts`	True only when a base component for this name is on disk, which a catalogue row alone is not. A specified-but-unbuilt id answers false, and so does a built id asked for at a base that does not carry it.
`isClinicalStatus`	function	`lib/status.ts`	-
`isDevelopment`	function	`lib/opsinjs.ts`	True in development, and false wherever that cannot be established.
`isHealthCategory`	function	`lib/catalogue.ts`	True for the four `health-*` categories, which carry the extra clinical obligations.
`isHealthCategory`	function	`lib/status.ts`	-
`isKind`	function	`lib/status.ts`	-
`isKnownId`	function	`lib/catalogue.ts`	Does this id exist at all, under any status?
`isNotImplemented`	function	`lib/status.ts`	True when a page at this status must carry a not-implemented marker.
`isResolvable`	function	`lib/registry.ts`	True when the id exists in the catalogue, whatever its status. Used to decide 404 from "no".
`isStatus`	function	`lib/status.ts`	-
`issueUrl`	function	`lib/routes.ts`	A prefilled docs issue. Used by `\<Feedback\>` when the feedback endpoint is unavailable.
`joinPath`	function	`lib/routes.ts`	Join path segments into a root-relative path, dropping empties and stray slashes.
`Kind`	type	`lib/status.ts`	A page's kind. This is a contract, not a label: `kind` fully determines the page's headings, and `assert-ia.mts` fails the build on a missing or an unexpected one.
`KINDS`	const	`lib/status.ts`	-
`LIGHTNESS_STEP`	const	`lib/preset.ts`	The quantisation of lightness: 1% per step.
`linearP3ToLinearSrgb`	function	`lib/color/oklch.ts`	Light-linear Display-P3 → light-linear sRGB, through XYZ (D65).
`linearSrgbToLinearP3`	function	`lib/color/oklch.ts`	Light-linear sRGB → light-linear Display-P3, through XYZ (D65).
`linearSrgbToOklab`	function	`lib/color/oklch.ts`	Light-linear sRGB → OKLab. Ottosson's forward matrices.
`linearToSrgb`	function	`lib/color/oklch.ts`	-
`listBases`	function	`lib/registry.ts`	-
`listByKind`	function	`lib/registry.ts`	Every entry of a kind, for the examples gallery and the screens index.
`listStyles`	function	`lib/registry.ts`	-
`MaterialRung`	type	`lib/opsinjs.ts`	A rung of the material ladder, meaning how a surface sits above what is behind it.
`maxChroma`	function	`lib/color/oklch.ts`	The largest chroma that is still inside `gamut` at this lightness and hue.
`minimumFontSize`	function	`lib/color/apca.ts`	The smallest font size, in px, at which this Lc is usable at the given weight, from a coarse reading of the APCA font-size guidance rather than from the full lookup table.
`mixOklch`	function	`lib/color/oklch.ts`	Mix two OKLCH colours. Hue takes the shorter way round the circle, which is what CSS `color-mix` does and what anyone reading the result expects.
`MODE_VALUES`	const	`lib/preset.ts`	The colour mode a theme opens in. `system` follows the reader's own setting.
`NEUTRAL_CHROMA_VALUES`	const	`lib/preset.ts`	Chroma of the neutral ramp. Index 0 is a dead grey; the default is index 2.
`ogUrl`	function	`lib/routes.ts`	The OG image service. One endpoint for the whole site. There is no per-route opengraph-image.
`Oklab`	interface	`lib/color/oklch.ts`	A colour in OKLab.
`oklabToLinearSrgb`	function	`lib/color/oklch.ts`	OKLab → light-linear sRGB. Ottosson's inverse matrices.
`oklabToOklch`	function	`lib/color/oklch.ts`	-
`Oklch`	interface	`lib/color/oklch.ts`	A colour in OKLCH. `l` 0 to 1, `c` unbounded, `h` in degrees.
`oklchToDisplayP3`	function	`lib/color/oklch.ts`	OKLCH → gamma-encoded Display-P3, 0 to 1 per channel. Not clamped.
`oklchToOklab`	function	`lib/color/oklch.ts`	-
`oklchToRgb255`	function	`lib/color/oklch.ts`	OKLCH → 0 to 255 sRGB integers, clamped. The input for both contrast models.
`oklchToSrgb`	function	`lib/color/oklch.ts`	OKLCH → gamma-encoded sRGB, 0 to 1 per channel. Not clamped.
`OPSIN_ERRORS`	const	`lib/opsinjs.ts`	The table `warnOnce()` reads. Generated from `tokens/errors.json`.
`OpsinError`	interface	`lib/opsinjs.ts`	One warning code: what it is called, how severe it is, and the page that prevents it.
`OpsinErrorCode`	type	`lib/opsinjs.ts`	Every warning code opsinjs can emit.
`OpsinErrorParams`	type	`lib/opsinjs.ts`	The values a message template asks for, keyed by placeholder name.
`OpsinErrorSeverity`	type	`lib/opsinjs.ts`	How severe a warning is.
`ORPHAN_ALLOWLIST`	const	`lib/routes.ts`	Routes that exist but are not reachable from the top nav or the sidebar, and are allowed not to be.
`OUTLINE_IS_EXACT`	const	`lib/status.ts`	`kind: project` is free-form and `kind: guide` has task sections between its fixed first and last headings, so for these two the outline is a REQUIRED SUBSET rather than the complete list. Everything else is exact.
`P3_CHROMA_GAIN`	const	`lib/color/derive.ts`	How much more chroma Display-P3 is allowed to spend than sRGB at the same step.
`parseColor`	function	`lib/color/oklch.ts`	Parse the colour syntaxes a person is likely to paste into the theme playground: `oklch(...)` with or without percentages, `#rrggbb`, and `rgb(r g b)` or `rgb(r, g, b)`. Anything else returns null rather than guessing. A theme derived from a misparsed brand colour is worse than a refusal to derive one.
`parseHex`	function	`lib/color/oklch.ts`	`#rgb`, `#rrggbb` or `#rrggbbaa` → sRGB 0 to 1. Returns null on anything else.
`passesApca`	function	`lib/color/apca.ts`	-
`Preset`	interface	`lib/preset.ts`	A theme as a person describes it. What `encodePreset` takes and `decodePreset` returns.
`PRESET_PREFIX`	const	`lib/preset.ts`	-
`presetBrandColor`	function	`lib/preset.ts`	The brand colour a preset describes, as an `oklch()` string the colour engine can parse.
`RADIUS_VALUES`	const	`lib/preset.ts`	`--opsin-radius-base` in px. Index 3 (14px) is the product default.
`Ramp`	type	`lib/color/derive.ts`	One complete lightness ramp, as a value per step. The chromatic ramp and the neutral ramp of a derived theme are both this shape.
`RAMP_LIGHTNESS`	const	`lib/color/derive.ts`	-
`RAMP_STEPS`	const	`lib/color/derive.ts`	The ramp steps, and the lightness of each. Mirrors `ladder` in tokens/color.json.
`RampStep`	type	`lib/color/derive.ts`	One rung of the lightness ladder, from 50 at the lightest to 950 at the darkest. The rungs are fixed, so two themes are comparable step by step.
`RampStepValue`	interface	`lib/color/derive.ts`	One rung of a ramp, as the sRGB value that ships, the wide-gamut value where P3 has headroom, and whether sRGB had to clamp the chroma away.
`referencePath`	function	`lib/routes.ts`	-
`ReferenceRange`	interface	`lib/opsinjs.ts`	The interval a reading is being compared against, and who says so.
`REFUSED_CONVERSIONS`	const	`lib/opsinjs.ts`	Conversions this system refuses to publish, and why. Generated from `tokens/units.json`.
`RefusedConversion`	interface	`lib/opsinjs.ts`	A pair people expect to be arithmetic and is not, with the reason.
`registryInstallUrl`	function	`lib/routes.ts`	What a consumer types to install an item. Rendered by `\<ComponentInstall\>`.
`RegistryLookup`	type	`lib/registry.ts`	Both call shapes are supported on purpose.
`registryMeta`	function	`lib/registry.ts`	Provenance for the registry surfaces: when it was generated and from what. `generatedAt: null` means the placeholder is still in place and `pnpm run generate` has not run. The registry pages say that out loud rather than rendering an empty table.
`RegistryQuery`	interface	`lib/registry.ts`	A request for one registry item, by id and optionally by base, style and kind. Anything left out falls back to the default.
`registryRoutes`	const	`lib/routes.ts`	-
`relativeLuminance`	function	`lib/color/wcag.ts`	WCAG 2.2 relative luminance, 0 for black and 1 for white.
`REVIEW_FLOOR_NOTICE`	const	`lib/status.ts`	THE REVIEW FLOOR, AS ONE STRING.
`Rgb`	interface	`lib/color/oklch.ts`	Red, green and blue, each 0 to 1, in whichever space the function says.
`Rgb255`	type	`lib/color/apca.ts`	A colour as 0 to 255 sRGB integers, which is what APCA is defined over.
`RoleName`	type	`lib/color/derive.ts`	The roles a derived theme guarantees. Components consume these and never a step.
`RolePair`	interface	`lib/color/derive.ts`	One semantic role in both colour modes. Roles are derived as a pair, because a role that exists only in light mode is a role that breaks in dark.
`RoleValue`	interface	`lib/color/derive.ts`	What a semantic role resolves to in one colour mode. The ramp step it came from, the OKLCH value, and the CSS it is written as.
`routes`	const	`lib/routes.ts`	-
`screenLuminance`	function	`lib/color/apca.ts`	Screen luminance Y for an sRGB triple, using APCA's own simple-exponent transfer rather than the piecewise sRGB curve. This is deliberate and is one of the places APCA and WCAG genuinely differ: APCA models the display, not the encoding.
`searchCatalogue`	function	`lib/catalogue.ts`	The filter behind `\<StatusMatrix\>`: matches an id, a name, the description or any alias. Substring matching, because the reader typing "range" wants both RangeBar and the reference-range guidance and has no reason to know which word the system chose.
`searchTokens`	function	`lib/tokens.ts`	Substring match over name, description and value. The `/tokens` browser's filter.
`SECTION_OUTLINES`	const	`lib/status.ts`	The H2s a page must have, by `kind`. This is the outline `content/_templates/*.mdx` implements, `\<PageTemplate\>` asserts and `assert-ia.mts` checks; all three read it from here so they cannot drift.
`SHIPPED_PRESETS`	const	`lib/preset.ts`	The shipped presets. Names, not codes, are what the documentation refers to; the code is what a reader copies. `build-tokens.mts` materialises each into `/r/themes/\<code\>.json`.
`sidebarTree`	const	`lib/sidebar-tree.ts`	DELIBERATELY NOT ANNOTATED as `PageTreeTransformer`. That type is generic over the content storage, and naming it here pins the generic to the default `PageData` rather than to the docs collection. `loader()` then infers its own output from the pinned transformer, and every caller of `page.data.status` elsewhere in the app stops compiling. Leaving the object structural lets the loader infer it at the call site, which is what the generic is for.
`simulate`	function	`lib/color/cvd.ts`	Simulate a dichromacy. `severity` 0 returns the input unchanged and 1 returns full dichromacy; values between interpolate in linear light.
`simulateOklch`	function	`lib/color/cvd.ts`	-
`simulateRgb255`	function	`lib/color/cvd.ts`	-
`site`	const	`lib/routes.ts`	-
`source`	const	`lib/source.ts`	-
`spokenUnit`	function	`lib/opsinjs.ts`	How a screen reader should say this unit for this count.
`srgbToLinear`	function	`lib/color/oklch.ts`	-
`srgbToOklch`	function	`lib/color/oklch.ts`	Gamma-encoded sRGB, 0 to 1 per channel → OKLCH.
`Status`	type	`lib/status.ts`	The release phase of a component page or a catalogue entry.
`STATUS_META`	const	`lib/status.ts`	-
`STATUS_ORDER`	const	`lib/status.ts`	Statuses in display order.
`statusCounts`	function	`lib/catalogue.ts`	Counts per status, in display order. The input to `\<SectionProgress\>`.
`STATUSES`	const	`lib/status.ts`	A RELEASE PHASE IS NEVER PAINTED, AND THERE IS NOW NOTHING HERE TO PAINT IT WITH.
`StatusMeta`	interface	`lib/status.ts`	What a release phase shows on a badge. A label and one sentence a reader can act on, which is also the chip's title and its accessible name.
`themeToCssVariables`	function	`lib/color/derive.ts`	Every custom property a derived theme emits, ready for a stylesheet or a copy button.
`toGrayscale`	function	`lib/color/cvd.ts`	Grayscale by relative luminance rather than by an average of the channels.
`toIndexRow`	function	`lib/catalogue.ts`	One row of `/r/index.json` and of the generated catalogue reference page.
`TOKEN_FORMAT_LABELS`	const	`lib/tokens.ts`	-
`TOKEN_NAMESPACE_LABELS`	const	`lib/tokens.ts`	-
`TOKEN_NAMESPACES`	const	`lib/tokens.ts`	-
`TOKEN_TIER_DESCRIPTIONS`	const	`lib/tokens.ts`	-
`TOKEN_TIER_LABELS`	const	`lib/tokens.ts`	-
`TokenFormat`	type	`lib/tokens.ts`	The formats the `/tokens` and `/colors` browsers can copy a value in.
`tokenMeta`	function	`lib/tokens.ts`	-
`tokensAreGenerated`	function	`lib/tokens.ts`	Whether the generated layer has actually been produced.
`tokensUsedBy`	function	`lib/tokens.ts`	Every token one component consumes. The query behind section 17 of a component page, and the reason `usedBy` is populated at generation time rather than inferred at render time.
`toRgb255`	function	`lib/color/oklch.ts`	0 to 1 sRGB → 0 to 255 integers, clamped.
`toRgb255Input`	function	`lib/color/apca.ts`	Coerce any accepted colour form to an sRGB triple.
`TrendPoint`	interface	`lib/opsinjs.ts`	One reading in a series, for the components that draw change over time.
`Unit`	interface	`lib/opsinjs.ts`	One unit: what it is called, what a reader sees, and how it is SPOKEN.
`UNIT_CONVERSIONS`	const	`lib/opsinjs.ts`	Every convertible ordered pair, composed by the generator. Never authored by hand.
`unitConversion`	function	`lib/opsinjs.ts`	The authored conversion between two symbols, or `undefined` when there is none.
`UnitConversion`	interface	`lib/opsinjs.ts`	An exact conversion between two units of the same kind.
`UNITS`	const	`lib/opsinjs.ts`	Every unit this system can speak, sorted by id. Generated from `tokens/units.json`.
`UNITS_BY_SYMBOL`	const	`lib/opsinjs.ts`	The lookup `findUnit()` reads, derived from `UNITS` rather than emitted twice.
`unknownImplementsIds`	function	`lib/catalogue.ts`	Validate a doctrine page's `implements` list. Every entry must be a real catalogue id. This is the check that would have caught `implements: [alert-banner, care-card, toast]` before `toast` was on the roster.
`UnknownStatus`	type	`lib/status.ts`	The absence of an assertion, which covers a reading never taken, a stale reading, or a reading whose reference range the product does not own.
`UnresolvedReason`	interface	`lib/registry.ts`	Why a lookup came back empty. The input to `\<NotBuiltYet\>`.
`ViewKind`	type	`lib/routes.ts`	What a `/view` route can render.
`ViewParams`	interface	`lib/routes.ts`	Everything a chrome-less preview URL can carry. Name and kind become path segments, and the rest become query parameters applied before first paint.
`viewPath`	function	`lib/routes.ts`	`/view/base/base-lyra/component/range-bar?mode=dark&text=200`.
`WarningLevel`	type	`lib/color/derive.ts`	How serious a derivation warning is. An `error` makes the theme unsound and stops it shipping, while a `warning` and a `note` are advisory.
`warnOnce`	function	`lib/opsinjs.ts`	Report a defect in development, once, and never do anything else.
`wcag`	const	`lib/color/wcag.ts`	The short name, matching `apca()`. Identical to `contrastRatio`.
`WCAG_FLOOR`	const	`lib/color/wcag.ts`	The three WCAG 2.2 thresholds this system checks against.
`WcagUse`	type	`lib/color/wcag.ts`	Which WCAG 2.2 contrast threshold applies. Body text, large text and non- text content each have a different floor.
`wcagVerdict`	function	`lib/color/wcag.ts`	-
`WcagVerdict`	interface	`lib/color/wcag.ts`	The result of one WCAG 2.2 contrast measurement, with the ratio, the floor for that use, and the success criterion it is measured against.