ui : parse imatrix and standalone draft sidecar filenames

extractQuantMeta now recognizes a -draft tail after the sidecar token
(Model-MTP-draft.gguf), a bare sidecar token filename (imatrix.gguf) and
suffix sidecars whose head carries no quant (Model-imatrix.gguf). imatrix
is an aux sidecar: it stays in the download chips with a badge, is never
a serve-command option, and mmproj alone drives the Vision capability.

Assisted-by: pi:zai-org/GLM-5.3

tools/ui/src/lib/components/app/models/discover/ModelsDiscoverModelDetails.svelte

@@ -3,7 +3,7 @@
 	import ModelsDiscoverModelDetailsHeader from './ModelsDiscoverModelDetailsHeader.svelte';
 	import ModelsDiscoverModelDetailsReadme from './ModelsDiscoverModelDetailsReadme.svelte';
 	import ModelsDiscoverModelDetailsSkeleton from './ModelsDiscoverModelDetailsSkeleton.svelte';
-	import { isAuxSidecar } from '$lib/constants';
+	import { ModelAuxSidecar } from '$lib/enums';
 	import { HuggingFaceService } from '$lib/services';
 	import type { HfModelDetailInfo, HfModelSibling } from '$lib/types/huggingface';
 	import { detectThinkingSupport, detectToolUseSupport } from '$lib/utils';
@@ -37,11 +37,7 @@
 	// Capabilities derived from HF metadata. Vision comes from an mmproj sidecar
 	// or a multimodal pipeline tag; tool use / reasoning from the chat template.
 	let hasMmproj = $derived(
-		files.some((f) => {
-			const sidecar = HuggingFaceService.extractQuantMeta(f.path)?.sidecar;
-
-			return sidecar !== null && sidecar !== undefined && isAuxSidecar(sidecar);
-		})
+		files.some((f) => HuggingFaceService.extractQuantMeta(f.path)?.sidecar === ModelAuxSidecar.MMPROJ)
 	);
 	let hasVision = $derived(hasMmproj || details?.pipeline_tag === 'image-text-to-text');
 	let hasTools = $derived(detectToolUseSupport(gguf?.chat_template ?? ''));
@@ -57,8 +53,9 @@
 		for (const file of files) {
 			const meta = HuggingFaceService.extractQuantMeta(file.path);
 
-			// mmproj sidecars are already conveyed by the Vision capability badge.
-			if (meta?.sidecar && isAuxSidecar(meta.sidecar)) continue;
+			// mmproj sidecars are already conveyed by the Vision capability badge;
+			// imatrix ships as a normal chip with its own badge.
+			if (meta?.sidecar === ModelAuxSidecar.MMPROJ) continue;
 
 			const depth = meta?.quant ? HuggingFaceService.getBitDepth(meta.quant) : null;
 			const bucket = depth ?? 99;

tools/ui/src/lib/components/app/models/discover/ModelsDiscoverModelDetailsDownloadOptionsQuantDownloadButton.svelte

@@ -4,7 +4,6 @@
 	import { Check, Download, Loader2, Pause, Play, RotateCw, X } from '@lucide/svelte';
 	import DialogConfirmation from '$lib/components/app/dialogs/DialogConfirmation.svelte';
 	import * as Tooltip from '$lib/components/ui/tooltip';
-	import { isAuxSidecar } from '$lib/constants';
 	import { HuggingFaceService } from '$lib/services';
 	import { modelsStore } from '$lib/stores';
 	import type { HfModelSibling } from '$lib/types';
@@ -65,7 +64,7 @@
 				onclick={() => (confirmDeleteOpen = true)}
 				type="button"
 			>
-				{#if meta?.sidecar && !isAuxSidecar(meta.sidecar)}
+				{#if meta?.sidecar}
 					<span
 						class="rounded-md bg-primary px-1 py-0.5 text-[10px] font-semibold tracking-wide text-primary-foreground uppercase"
 					>
@@ -131,7 +130,7 @@
 					}}
 					type="button"
 				>
-					{#if meta?.sidecar && !isAuxSidecar(meta.sidecar)}
+					{#if meta?.sidecar}
 						<span
 							class="rounded-md bg-primary px-1 py-0.5 text-[10px] font-semibold tracking-wide text-primary-foreground uppercase"
 						>
@@ -224,7 +223,7 @@
 					</span>
 				{/if}
 
-				{#if meta?.sidecar && !isAuxSidecar(meta.sidecar)}
+				{#if meta?.sidecar}
 					<span
 						class="rounded-md bg-primary px-1 py-0.5 text-[10px] font-semibold tracking-wide text-primary-foreground uppercase"
 					>

tools/ui/src/lib/components/app/models/discover/download-options.utils.ts

@@ -1,4 +1,4 @@
-import { isAuxSidecar, type ModelSidecar } from '$lib/constants';
+import { isAuxSidecar, isDraftSidecar, type ModelSidecar } from '$lib/constants';
 import { ModelAuxSidecar, ModelDraftSidecar } from '$lib/enums';
 import { HuggingFaceService } from '$lib/services';
 import type { HfModelSibling } from '$lib/types/huggingface';
@@ -43,9 +43,13 @@ export function classify(path: string): 'main' | 'draft' | 'aux' {
 
 /** Display label of a file: its quant, else the file name without the extension. */
 export function labelFor(path: string): string {
-	const quant = HuggingFaceService.extractQuantMeta(path)?.quant;
+	const meta = HuggingFaceService.extractQuantMeta(path);
 
-	if (quant) return quant;
+	if (meta?.quant) return meta.quant;
+
+	// Quantless sidecar files: the chip badge already carries the sidecar type,
+	// so the label only marks draft files; aux sidecars badge alone.
+	if (meta?.sidecar) return isDraftSidecar(meta.sidecar) ? 'draft' : '';
 
 	const basename = path.split('/').pop() ?? path;
 
@@ -65,9 +69,10 @@ export function quantBitDepth(quant: string | null): number {
 	return bit ? Number(bit) : 99;
 }
 
-// LLAMA-APP-REUSE: --spec-type value for each draft sidecar
+// LLAMA-APP-REUSE: --spec-type value for each draft sidecar; aux sidecars stay empty
 export const SPEC_TYPE: Record<ModelSidecar, string> = {
 	[ModelAuxSidecar.MMPROJ]: '',
+	[ModelAuxSidecar.IMATRIX]: '',
 	[ModelDraftSidecar.DFLASH]: 'draft-dflash',
 	[ModelDraftSidecar.DSPARK]: 'draft-dspark',
 	[ModelDraftSidecar.EAGLE3]: 'eagle3',

tools/ui/src/lib/constants/model-id.constants.ts

@@ -75,10 +75,12 @@ export const MODEL_ID = {
 	/**
 	 * Trailing `-<type>` suffix marking a GGUF with an embedded draft in the
 	 * same weight file (MTP) or a sidecar download entry, e.g.
-	 * `Hy3-IQ1_M-mtp.gguf`, `Q4_K_M-dspark`. The captured prefix is the
-	 * candidate model id; the caller decides whether it looks quantized.
+	 * `Hy3-IQ1_M-mtp.gguf`, `Q4_K_M-dspark`. An optional `-draft` tail covers
+	 * standalone sidecar files, e.g. `Model-MTP-draft.gguf`. The captured
+	 * prefix is the candidate model id; the caller decides whether it looks
+	 * quantized.
 	 */
-	SIDECAR_SUFFIX_REGEX: new RegExp(`^(.*)-(${SIDECAR_TOKEN_ALTERNATION})$`, 'i'),
+	SIDECAR_SUFFIX_REGEX: new RegExp(`^(.*)-(${SIDECAR_TOKEN_ALTERNATION})(-draft)?$`, 'i'),
 
 	/** Matches a trailing weight file extension, e.g. `model.gguf` -> `model`. */
 	WEIGHT_EXTENSION_REGEX: /\.(gguf|ggml)$/i

tools/ui/src/lib/enums/model.enums.ts

@@ -32,5 +32,7 @@ export enum ModelDraftSidecar {
  */
 export enum ModelAuxSidecar {
 	/** Multimodal projector: unlocks vision and/or audio input modalities. */
-	MMPROJ = 'mmproj'
+	MMPROJ = 'mmproj',
+	/** Importance-matrix data used to build imatrix quants; not loaded at serve time. */
+	IMATRIX = 'imatrix'
 }

tools/ui/src/lib/services/huggingface.service.ts

@@ -168,8 +168,9 @@ export class HuggingFaceService {
 	 * Extract the GGUF quantization token (e.g. `Q4_K_M`) and any sidecar type
 	 * (`mtp`, `dflash`, `mmproj`, ...) from a `.gguf` filename. The sidecar token
 	 * shows up either as a sidecar prefix (`mtp-<name>.gguf`, `dflash-<name>.gguf`,
-	 * `mmproj-<name>.gguf`) or as the `-mtp` suffix when the draft model is
-	 * embedded in the same GGUF weight file.
+	 * `mmproj-<name>.gguf`), as a `-mtp` suffix, or as the whole filename
+	 * (`imatrix.gguf`); a `-draft` tail marks a standalone sidecar file
+	 * (`Model-MTP-draft.gguf`).
 	 *
 	 * `sidecarForm` records which side of the filename the sidecar token sat
 	 * on so callers can render badges differently (e.g. prefix on the left of
@@ -197,6 +198,14 @@ export class HuggingFaceService {
 		let sidecar: ModelSidecar | null = null;
 		let sidecarForm: SidecarForm | null = null;
 
+		// A file named just the sidecar token (`imatrix.gguf`) is the sidecar
+		// itself: no name or quant segments to parse.
+		const bareSidecar = sidecarFromFileToken(source.toLowerCase());
+
+		if (bareSidecar) {
+			return { quant: null, shared: false, sidecar: bareSidecar, sidecarForm: SidecarForm.PREFIX };
+		}
+
 		const prefixMatch = source.match(MODEL_ID.SIDECAR_PREFIX_REGEX);
 
 		if (prefixMatch) {
@@ -207,14 +216,12 @@ export class HuggingFaceService {
 			const suffixMatch = source.match(MODEL_ID.SIDECAR_SUFFIX_REGEX);
 
 			if (suffixMatch) {
-				const candidate = suffixMatch[1];
-				const headSeg = candidate.split(MODEL_ID.SEGMENT_SEPARATOR).pop();
-
-				if (headSeg && MODEL_ID.QUANTIZATION_SEGMENT_REGEX.test(headSeg)) {
-					sidecar = sidecarFromFileToken(suffixMatch[2].toLowerCase());
-					sidecarForm = SidecarForm.SUFFIX;
-					source = candidate;
-				}
+				// Take the suffix sidecar even when the head carries no quant:
+				// embedded drafts end in one (`Hy3-IQ1_M-mtp`), standalone sidecar
+				// files do not (`Model-MTP-draft`, `Model-imatrix`).
+				sidecar = sidecarFromFileToken(suffixMatch[2].toLowerCase());
+				sidecarForm = SidecarForm.SUFFIX;
+				source = suffixMatch[1];
 			}
 		}