diff --git a/tools/ui/src/app.d.ts b/tools/ui/src/app.d.ts
index 1c3d006824..2c896ed448 100644
--- a/tools/ui/src/app.d.ts
+++ b/tools/ui/src/app.d.ts
@@ -20,13 +20,11 @@ import type {
 	ApiModelDataEntry,
 	ApiModelLoadStage,
 	ApiModelsListResponse,
-	ApiModelsLoadRequest,
 	ApiModelsLoadResponse,
 	ApiModelsSseData,
 	ApiModelsSseEvent,
 	ApiModelsSseProgress,
 	ApiModelsStatusResponse,
-	ApiModelsUnloadRequest,
 	ApiModelsUnloadResponse,
 	ApiProcessingState,
 	ChatAttachmentDisplayItem,
diff --git a/tools/ui/src/lib/components/app/models/ModelsSelectorOption.svelte b/tools/ui/src/lib/components/app/models/ModelsSelectorOption.svelte
index 1faeb0c4a5..bc97f7370e 100644
--- a/tools/ui/src/lib/components/app/models/ModelsSelectorOption.svelte
+++ b/tools/ui/src/lib/components/app/models/ModelsSelectorOption.svelte
@@ -60,7 +60,8 @@
 	let loadTitle = $derived(modelLoadProgressText(loadProgress));
 	let modalities = $derived(option.modalities);
 	let capabilities = $derived.by(() => ({
-		reasoning: modelsStore.props.checkModelSupportsThinking(option.model)
+		reasoning: modelsStore.props.checkModelSupportsThinking(option.model),
+		tools: option.capabilities.includes('tools')
 	}));
 </script>
 
diff --git a/tools/ui/src/lib/constants/icons.constants.ts b/tools/ui/src/lib/constants/icons.constants.ts
index a0ce22f95e..ce32f0e1e9 100644
--- a/tools/ui/src/lib/constants/icons.constants.ts
+++ b/tools/ui/src/lib/constants/icons.constants.ts
@@ -10,7 +10,8 @@ import {
 	Image as ImageIcon,
 	Lightbulb as ReasoningIcon,
 	Mic as AudioIcon,
-	Video as VideoIcon
+	Video as VideoIcon,
+	Wrench as ToolUseIcon
 } from '@lucide/svelte';
 import { FileTypeCategory, ModelCapability, ModelModality } from '$lib/enums';
 import type { ModelCapabilities, ModelModalities } from '$lib/types/models';
@@ -49,16 +50,19 @@ export const MODALITY_FLAG_KEYS: Record<
 };
 
 export const CAPABILITY_ICONS: Record<ModelCapability, Component> = {
-	[ModelCapability.REASONING]: ReasoningIcon
+	[ModelCapability.REASONING]: ReasoningIcon,
+	[ModelCapability.TOOL_USE]: ToolUseIcon
 } as const;
 
 export const CAPABILITY_LABELS: Record<ModelCapability, string> = {
-	[ModelCapability.REASONING]: 'Reasoning'
+	[ModelCapability.REASONING]: 'Reasoning',
+	[ModelCapability.TOOL_USE]: 'Tool use'
 } as const;
 
 /** Maps a ModelCapability to the boolean flag it drives on the ModelCapabilities type */
 export const CAPABILITY_FLAG_KEYS: Record<ModelCapability, keyof ModelCapabilities> = {
-	[ModelCapability.REASONING]: 'reasoning'
+	[ModelCapability.REASONING]: 'reasoning',
+	[ModelCapability.TOOL_USE]: 'tools'
 };
 
 // Shared SVG icon strings for copy and preview buttons
diff --git a/tools/ui/src/lib/constants/model-id.constants.ts b/tools/ui/src/lib/constants/model-id.constants.ts
index 081a13e0e6..b4c9e50daf 100644
--- a/tools/ui/src/lib/constants/model-id.constants.ts
+++ b/tools/ui/src/lib/constants/model-id.constants.ts
@@ -2,6 +2,37 @@
  * Parsing of `org/ModelName[-tag][:quant]` style model IDs.
  */
 
+import { ModelAuxSidecar, ModelDraftSidecar } from '$lib/enums';
+
+/** Any sidecar file type: a draft variant or an auxiliary sidecar like mmproj. */
+export type ModelSidecar = ModelDraftSidecar | ModelAuxSidecar;
+
+/** Lowercase filename token for each sidecar, e.g. `mtp-Q4_0.gguf`, `mmproj-F16.gguf`. */
+export const SIDECAR_FILE_TOKENS: Record<ModelSidecar, string> = {
+	[ModelAuxSidecar.MMPROJ]: 'mmproj',
+	[ModelDraftSidecar.DFLASH]: 'dflash',
+	[ModelDraftSidecar.DSPARK]: 'dspark',
+	[ModelDraftSidecar.EAGLE3]: 'eagle3',
+	[ModelDraftSidecar.MTP]: 'mtp'
+};
+
+const SIDECARS_BY_FILE_TOKEN = Object.fromEntries(
+	Object.entries(SIDECAR_FILE_TOKENS).map(([sidecar, token]) => [token, sidecar])
+) as Record<string, ModelSidecar>;
+
+/** Map a lowercase filename token (e.g. `mtp`) to its sidecar enum value. */
+export function sidecarFromFileToken(token: string): ModelSidecar | null {
+	return SIDECARS_BY_FILE_TOKEN[token] ?? null;
+}
+
+export function isDraftSidecar(sidecar: ModelSidecar): sidecar is ModelDraftSidecar {
+	return (Object.values(ModelDraftSidecar) as string[]).includes(sidecar);
+}
+
+export function isAuxSidecar(sidecar: ModelSidecar): sidecar is ModelAuxSidecar {
+	return (Object.values(ModelAuxSidecar) as string[]).includes(sidecar);
+}
+
 export const MODEL_ID = {
 	/**
 	 * Matches an activated-parameter-count segment, e.g. `A10B`, `a2.4b`.
@@ -15,10 +46,8 @@ export const MODEL_ID = {
 	IGNORED_SEGMENTS: new Set(['GGUF', 'GGML']),
 	/** Sentinel value returned by `indexOf` when a substring is not found. */
 	NOT_FOUND: -1,
-
 	/** Separates `<org>` from `<model>` in a model ID, e.g. `org/ModelName`. */
 	ORG_SEPARATOR: '/',
-
 	/**
 	 * Matches a parameter-count segment, e.g. `7B`, `1.5b`, `120M`.
 	 * The optional leading `E` covers effective-parameter sizes, e.g. Gemma's
@@ -38,6 +67,22 @@ export const MODEL_ID = {
 	/** Separates named segments within the model path, e.g. `ModelName-7B-GGUF`. */
 	SEGMENT_SEPARATOR: '-',
 
+	/**
+	 * Sidecar prefix that wraps a model id with a sidecar type, e.g.
+	 * `mtp-<name>.gguf`, `dflash-<name>.gguf`, `dspark-<name>.gguf`,
+	 * `eagle3-<name>.gguf`, `mmproj-<name>.gguf`. Captures the bare type
+	 * token for typed lookup.
+	 */
+	SIDECAR_PREFIX_RE: /^(mtp|dflash|dspark|eagle3|mmproj)-(.*)$/i,
+
+	/**
+	 * Trailing `-<type>` suffix marking a GGUF with an embedded draft in the
+	 * same weight file (MTP) or a sidecar download entry, e.g.
+	 * `Hy3-IQ1_M-mtp.gguf`, `Q4_K_M-dspark`. The captured prefix is the
+	 * candidate model id; the caller decides whether it looks quantized.
+	 */
+	SIDECAR_SUFFIX_RE: /^(.*)-(mtp|dflash|dspark|eagle3)$/i,
+
 	/** Matches a trailing weight file extension, e.g. `model.gguf` -> `model`. */
 	WEIGHT_EXTENSION_RE: /\.(gguf|ggml)$/i
 };
diff --git a/tools/ui/src/lib/enums/index.ts b/tools/ui/src/lib/enums/index.ts
index e0b15bc729..b20875f80f 100644
--- a/tools/ui/src/lib/enums/index.ts
+++ b/tools/ui/src/lib/enums/index.ts
@@ -67,7 +67,7 @@ export {
 	JsonSchemaType
 } from './mcp.enums';
 
-export { ModelCapability, ModelModality } from './model.enums';
+export { ModelAuxSidecar, ModelCapability, ModelDraftSidecar, ModelModality } from './model.enums';
 
 export { ServerRole, ServerModelStatus, ServerModelsSseEventType } from './server.enums';
 
diff --git a/tools/ui/src/lib/enums/model.enums.ts b/tools/ui/src/lib/enums/model.enums.ts
index db085a27a7..b6b97ab2b5 100644
--- a/tools/ui/src/lib/enums/model.enums.ts
+++ b/tools/ui/src/lib/enums/model.enums.ts
@@ -6,5 +6,30 @@ export enum ModelModality {
 }
 
 export enum ModelCapability {
-	REASONING = 'REASONING'
+	REASONING = 'REASONING',
+	TOOL_USE = 'TOOL_USE'
+}
+
+/**
+ * Speculative-decoding draft sidecars (server spec-type draft-*).
+ * Filenames use the lowercase token, e.g. `mtp-<name>.gguf` or `-mtp` suffix.
+ */
+export enum ModelDraftSidecar {
+	/** DFlash block-diffusion draft (spec-type draft-dflash). */
+	DFLASH = 'DFLASH',
+	/** DSpark block-diffusion draft (spec-type draft-dspark). */
+	DSPARK = 'DSPARK',
+	/** EAGLE-3 speculative draft (spec-type draft-eagle3). */
+	EAGLE3 = 'EAGLE3',
+	/** Multi-token-prediction draft head (spec-type draft-mtp). */
+	MTP = 'MTP'
+}
+
+/**
+ * Non-draft sidecar file types. A sidecar is any auxiliary GGUF file
+ * accompanying the main model weights.
+ */
+export enum ModelAuxSidecar {
+	/** Multimodal projector: unlocks vision and/or audio input modalities. */
+	MMPROJ = 'MMPROJ'
 }
diff --git a/tools/ui/src/lib/services/models.service.ts b/tools/ui/src/lib/services/models.service.ts
index 070c935c65..5bebbbb9fe 100644
--- a/tools/ui/src/lib/services/models.service.ts
+++ b/tools/ui/src/lib/services/models.service.ts
@@ -7,7 +7,7 @@
  */
 
 import { base } from '$app/paths';
-import { API_MODELS, MODEL_ID } from '$lib/constants';
+import { API_MODELS, MODEL_ID, type ModelSidecar, sidecarFromFileToken } from '$lib/constants';
 import { ServerModelStatus } from '$lib/enums';
 import type { ParsedModelId } from '$lib/types/models';
 import {
@@ -22,6 +22,30 @@ import { getAuthHeaders } from '$lib/utils/api-headers';
 export class ModelsService {
 	private static readonly SSE_RECONNECT_MS = 1000;
 
+	/**
+	 * Build the `<repo>:<tag>` string expected by POST /models from a parsed
+	 * filename quant + optional sidecar type. Used by the model download
+	 * dialog so callers don't have to know about the tag conventions.
+	 *
+	 * @param repoId - HuggingFace repo id (e.g. `ggml-org/gemma-3-4b-it-GGUF`)
+	 * @param quant - Quantization token, e.g. `Q4_K_M`
+	 * @param sidecar - Sidecar type, uppercased into the tag (e.g. `MTP`)
+	 * @returns Repo id possibly suffixed with `:tag`
+	 */
+	static buildDownloadTag(
+		repoId: string,
+		quant: string | null,
+		sidecar: ModelSidecar | null
+	): string {
+		if (!quant && !sidecar) return repoId;
+
+		if (!quant) return `${repoId}:${sidecar}`;
+
+		const tag = sidecar ? `${quant}-${sidecar}` : quant;
+
+		return `${repoId}:${tag}`;
+	}
+
 	/**
 	 * Check if a model is loaded based on its metadata.
 	 *
@@ -97,11 +121,46 @@ export class ModelsService {
 			params: null,
 			quantization: null,
 			raw: modelId,
+			sidecar: null,
 			tags: []
 		};
+
 		// strip directory path and weight extension so a bare `-m /path/file.gguf`
 		// parses like a clean repo id; the HF `org/model` form is preserved
-		const source = normalizeModelName(modelId).replace(MODEL_ID.WEIGHT_EXTENSION_RE, '');
+		let source = normalizeModelName(modelId).replace(MODEL_ID.WEIGHT_EXTENSION_RE, '');
+
+		// 0. Detect sidecar prefix (mtp-, dflash-, mmproj-) before any other
+		//    splitting so the inner id parses cleanly.
+		const prefixMatch = source.match(MODEL_ID.SIDECAR_PREFIX_RE);
+
+		if (prefixMatch) {
+			result.sidecar = sidecarFromFileToken(prefixMatch[1].toLowerCase());
+			source = prefixMatch[2];
+
+			// a sidecar filename's remainder may be just the quant token,
+			// e.g. `mtp-Q4_0.gguf` or `mmproj-F16.gguf`
+			if (MODEL_ID.QUANTIZATION_SEGMENT_RE.test(source)) {
+				result.quantization = source.toUpperCase();
+				source = '';
+			}
+		} else {
+			// 0b. Detect `-<type>` suffix (`-mtp`, `-dflash`, `-dspark`, `-eagle3`).
+			//     Only strip it when the segment preceding it looks like a real quant
+			//     token, so a model literally named `MyModel-mtp` is not mistaken for a
+			//     draft one.
+			const suffixMatch = source.match(MODEL_ID.SIDECAR_SUFFIX_RE);
+
+			if (suffixMatch) {
+				const candidate = suffixMatch[1];
+				const headSeg = candidate.split(MODEL_ID.SEGMENT_SEPARATOR).pop();
+
+				if (headSeg && MODEL_ID.QUANTIZATION_SEGMENT_RE.test(headSeg)) {
+					result.sidecar = sidecarFromFileToken(suffixMatch[2].toLowerCase());
+					source = candidate;
+				}
+			}
+		}
+
 		// 1. Extract colon-separated quantization (e.g. `model:Q4_K_M`)
 		const colonIdx = source.indexOf(MODEL_ID.QUANTIZATION_SEPARATOR);
 
diff --git a/tools/ui/src/lib/types/models.d.ts b/tools/ui/src/lib/types/models.d.ts
index 0b7523113d..03c723e1ae 100644
--- a/tools/ui/src/lib/types/models.d.ts
+++ b/tools/ui/src/lib/types/models.d.ts
@@ -1,3 +1,4 @@
+import type { ModelSidecar } from '$lib/constants/model-id.constants';
 import type { ApiModelDataEntry, ApiModelDetails, ApiModelLoadStage } from '$lib/types/api';
 
 export interface ModelModalities {
@@ -8,6 +9,7 @@ export interface ModelModalities {
 
 export interface ModelCapabilities {
 	reasoning: boolean;
+	tools: boolean;
 }
 
 export interface ModelOption {
@@ -42,6 +44,7 @@ export interface ParsedModelId {
 	params: string | null;
 	activatedParams: string | null;
 	quantization: string | null;
+	sidecar: ModelSidecar | null;
 	tags: string[];
 }
 
diff --git a/tools/ui/tests/unit/model-id-parser.test.ts b/tools/ui/tests/unit/model-id-parser.test.ts
index 5903f196ab..82009acb9d 100644
--- a/tools/ui/tests/unit/model-id-parser.test.ts
+++ b/tools/ui/tests/unit/model-id-parser.test.ts
@@ -12,6 +12,7 @@ describe('parseModelId', () => {
 			params: null,
 			quantization: null,
 			raw: 'model-name-1',
+			sidecar: null,
 			tags: []
 		});
 
@@ -22,6 +23,7 @@ describe('parseModelId', () => {
 			params: null,
 			quantization: null,
 			raw: 'org/model-name-2',
+			sidecar: null,
 			tags: []
 		});
 	});
@@ -105,6 +107,7 @@ describe('parseModelId', () => {
 			params: null,
 			quantization: 'Q2_K_XL',
 			raw: 'unsloth/DeepSeek-V4-Flash-0731-GGUF:Q2_K_XL',
+			sidecar: null,
 			tags: []
 		});
 
@@ -115,6 +118,7 @@ describe('parseModelId', () => {
 			params: null,
 			quantization: 'Q4_K_XL',
 			raw: 'unsloth/Laguna-S-2.1-GGUF:Q4_K_XL',
+			sidecar: null,
 			tags: []
 		});
 
@@ -125,6 +129,7 @@ describe('parseModelId', () => {
 			params: null,
 			quantization: null,
 			raw: 'org/Model-Name-GGUF',
+			sidecar: null,
 			tags: []
 		});
 	});
@@ -137,6 +142,7 @@ describe('parseModelId', () => {
 			params: '8B',
 			quantization: null,
 			raw: 'meta-llama/Llama-3.1-8B',
+			sidecar: null,
 			tags: []
 		});
 
@@ -147,6 +153,7 @@ describe('parseModelId', () => {
 			params: '120B',
 			quantization: 'MXFP4',
 			raw: 'openai/gpt-oss-120b-MXFP4',
+			sidecar: null,
 			tags: []
 		});
 
@@ -157,6 +164,7 @@ describe('parseModelId', () => {
 			params: '20B',
 			quantization: 'Q4_K_M',
 			raw: 'openai/gpt-oss-20b:Q4_K_M',
+			sidecar: null,
 			tags: []
 		});
 
@@ -167,6 +175,7 @@ describe('parseModelId', () => {
 			params: '30B',
 			quantization: 'BF16',
 			raw: 'Qwen/Qwen3-Coder-30B-A3B-Instruct-1M-BF16',
+			sidecar: null,
 			tags: ['Instruct', '1M']
 		});
 	});
@@ -179,6 +188,7 @@ describe('parseModelId', () => {
 			params: '17B',
 			quantization: 'Q4_K_M',
 			raw: 'meta-llama/Llama-4-Scout-17B-16E-Instruct-Q4_K_M',
+			sidecar: null,
 			tags: ['16E', 'Instruct']
 		});
 
@@ -189,6 +199,7 @@ describe('parseModelId', () => {
 			params: null,
 			quantization: 'IQ4_XS',
 			raw: 'MiniMaxAI/MiniMax-M2-IQ4_XS',
+			sidecar: null,
 			tags: []
 		});
 
@@ -199,6 +210,7 @@ describe('parseModelId', () => {
 			params: null,
 			quantization: 'UD-Q3_K_XL',
 			raw: 'MiniMaxAI/MiniMax-M2-UD-Q3_K_XL',
+			sidecar: null,
 			tags: []
 		});
 
@@ -209,6 +221,7 @@ describe('parseModelId', () => {
 			params: '123B',
 			quantization: 'Q4_K_M',
 			raw: 'mistralai/Devstral-2-123B-Instruct-2512-Q4_K_M',
+			sidecar: null,
 			tags: ['Instruct', '2512']
 		});
 
@@ -219,6 +232,7 @@ describe('parseModelId', () => {
 			params: '24B',
 			quantization: 'Q8_0',
 			raw: 'mistralai/Devstral-Small-2-24B-Instruct-2512-Q8_0',
+			sidecar: null,
 			tags: ['Instruct', '2512']
 		});
 
@@ -229,6 +243,7 @@ describe('parseModelId', () => {
 			params: null,
 			quantization: 'MXFP4_MOE',
 			raw: 'noctrex/GLM-4.7-Flash-MXFP4_MOE',
+			sidecar: null,
 			tags: []
 		});
 
@@ -239,6 +254,7 @@ describe('parseModelId', () => {
 			params: null,
 			quantization: 'Q4_K_M',
 			raw: 'Qwen/Qwen3-Coder-Next-Q4_K_M',
+			sidecar: null,
 			tags: []
 		});
 
@@ -249,6 +265,7 @@ describe('parseModelId', () => {
 			params: '120B',
 			quantization: 'Q4_K_M',
 			raw: 'openai/gpt-oss-120b-Q4_K_M',
+			sidecar: null,
 			tags: []
 		});
 
@@ -259,6 +276,7 @@ describe('parseModelId', () => {
 			params: '20B',
 			quantization: 'F16',
 			raw: 'openai/gpt-oss-20b-F16',
+			sidecar: null,
 			tags: []
 		});
 
@@ -269,6 +287,7 @@ describe('parseModelId', () => {
 			params: null,
 			quantization: 'Q4_K_M',
 			raw: 'nomic-embed-text-v2-moe.Q4_K_M',
+			sidecar: null,
 			tags: []
 		});
 	});
@@ -304,4 +323,41 @@ describe('parseModelId', () => {
 			tags: ['it']
 		});
 	});
+
+	it('parses sidecar file tokens', () => {
+		// sidecar prefix: bare filename or multi-slash path reduces to the filename
+		expect(parseModelId('mtp-Q4_0.gguf')).toMatchObject({
+			quantization: 'Q4_0',
+			sidecar: 'MTP'
+		});
+
+		expect(parseModelId('ggml-org/Model-GGUF/mtp-Q4_0.gguf')).toMatchObject({
+			quantization: 'Q4_0',
+			sidecar: 'MTP'
+		});
+
+		expect(parseModelId('ggml-org/Model-GGUF/mmproj-F16.gguf')).toMatchObject({
+			quantization: 'F16',
+			sidecar: 'MMPROJ'
+		});
+
+		// embedded-draft suffix: -<type> only strips when preceded by a quant
+		expect(parseModelId('ggml-org/Hy3-IQ1_M-mtp')).toMatchObject({
+			modelName: 'Hy3',
+			quantization: 'IQ1_M',
+			sidecar: 'MTP'
+		});
+
+		// a model literally named MyModel-mtp is not a draft
+		expect(parseModelId('ggml-org/MyModel-mtp')).toMatchObject({
+			modelName: 'MyModel-mtp',
+			sidecar: null
+		});
+
+		// no sidecar
+		expect(parseModelId('ggml-org/model-Q4_K_M')).toMatchObject({
+			quantization: 'Q4_K_M',
+			sidecar: null
+		});
+	});
 });