diff --git a/src/lib/components/sidebar/AddArtifactSidebar.svelte b/src/lib/components/sidebar/AddArtifactSidebar.svelte
new file mode 100644
index 00000000..f0095b62
--- /dev/null
+++ b/src/lib/components/sidebar/AddArtifactSidebar.svelte
@@ -0,0 +1,391 @@
+<svelte:options runes={true} />
+
+<script lang="ts">
+	/**
+	 * AddArtifactSidebar - Root pane for adding a new artifact to collection
+	 *
+	 * Flow:
+	 * 1. Select proficiency (weapon type)
+	 * 2. Select element (with colored dots)
+	 * 3. Select artifact (filtered by proficiency - ~3 options)
+	 * 4. Configure level, nickname
+	 * 5. Configure skills (for standard artifacts only, uses pane stack)
+	 */
+	import type { Artifact, ArtifactSkill, ArtifactSkillInstance, CollectionArtifactInput } from '$lib/types/api/artifact'
+	import { isQuirkArtifact, getSkillGroupForSlot } from '$lib/types/api/artifact'
+	import { createQuery } from '@tanstack/svelte-query'
+	import { artifactQueries } from '$lib/api/queries/artifact.queries'
+	import { useCreateCollectionArtifact } from '$lib/api/mutations/artifact.mutations'
+	import { usePaneStack, type PaneConfig } from '$lib/stores/paneStack.svelte'
+	import DetailsSection from '$lib/components/sidebar/details/DetailsSection.svelte'
+	import DetailRow from '$lib/components/sidebar/details/DetailRow.svelte'
+	import Select from '$lib/components/ui/Select.svelte'
+	import Input from '$lib/components/ui/Input.svelte'
+	import ArtifactSkillRow from '$lib/components/artifact/ArtifactSkillRow.svelte'
+	import ArtifactModifierList from '$lib/components/artifact/ArtifactModifierList.svelte'
+	import Button from '$lib/components/ui/Button.svelte'
+
+	interface Props {
+		/** Callback when artifact is created successfully */
+		onSuccess?: () => void
+		/** Callback to close the sidebar */
+		onClose?: () => void
+	}
+
+	const { onSuccess, onClose }: Props = $props()
+
+	// Get the pane stack from context for pushing modifier selection panes
+	const paneStack = usePaneStack()
+
+	// Mutation for creating artifact
+	const createMutation = useCreateCollectionArtifact()
+
+	// Query all artifacts for dropdown
+	const artifactsQuery = createQuery(() => artifactQueries.all())
+
+	// Query all skills for skill rows
+	const skillsQuery = createQuery(() => artifactQueries.skills())
+
+	// Local state for form - ordered by user flow
+	let proficiency = $state<number | undefined>(undefined)
+	let element = $state<number | undefined>(undefined)
+	let selectedArtifactId = $state<string | undefined>(undefined)
+	let level = $state<number>(1)
+	let nickname = $state<string>('')
+	let skills = $state<(ArtifactSkillInstance | null)[]>([null, null, null, null])
+
+	// Element colors for dots (CSS colors that work in both light/dark themes)
+	const ELEMENT_COLORS: Record<number, string> = {
+		1: '#1dc688', // Wind - green
+		2: '#ec5c5c', // Fire - red
+		3: '#5cb7ec', // Water - blue
+		4: '#ec985c', // Earth - orange/brown
+		5: '#c65cec', // Dark - purple
+		6: '#c59c0c'  // Light - gold/yellow
+	}
+
+	// Proficiency options - matches database enum values
+	const proficiencyOptions = [
+		{ value: 1, label: 'Sabre' },
+		{ value: 2, label: 'Dagger' },
+		{ value: 3, label: 'Axe' },
+		{ value: 4, label: 'Spear' },
+		{ value: 5, label: 'Bow' },
+		{ value: 6, label: 'Staff' },
+		{ value: 7, label: 'Melee' },
+		{ value: 8, label: 'Harp' },
+		{ value: 9, label: 'Gun' },
+		{ value: 10, label: 'Katana' }
+	]
+
+	// Element options with colored dots
+	const elementOptions = [
+		{ value: 1, label: 'Wind', color: ELEMENT_COLORS[1] },
+		{ value: 2, label: 'Fire', color: ELEMENT_COLORS[2] },
+		{ value: 3, label: 'Water', color: ELEMENT_COLORS[3] },
+		{ value: 4, label: 'Earth', color: ELEMENT_COLORS[4] },
+		{ value: 5, label: 'Dark', color: ELEMENT_COLORS[5] },
+		{ value: 6, label: 'Light', color: ELEMENT_COLORS[6] }
+	]
+
+	// Filter artifacts by selected proficiency
+	// Standard artifacts have a fixed proficiency, quirk artifacts match any proficiency
+	const filteredArtifacts = $derived.by(() => {
+		if (!artifactsQuery.data || proficiency === undefined) return []
+		return artifactsQuery.data.filter(a => {
+			// Quirk artifacts have null proficiency - they work with any proficiency
+			if (a.proficiency === null) return true
+			// Standard artifacts match their fixed proficiency
+			return a.proficiency === proficiency
+		})
+	})
+
+	// Build artifact options for dropdown (filtered by proficiency)
+	const artifactOptions = $derived.by(() => {
+		return filteredArtifacts.map(a => ({
+			value: a.id,
+			label: typeof a.name === 'string' ? a.name : (a.name.en || a.name.ja || '—')
+		}))
+	})
+
+	// Selected artifact data
+	const selectedArtifact = $derived(
+		artifactsQuery.data?.find(a => a.id === selectedArtifactId)
+	)
+	const isQuirk = $derived(selectedArtifact ? isQuirkArtifact(selectedArtifact) : false)
+
+	// Level options (1-5 for standard, fixed at 1 for quirk)
+	const levelOptions = $derived(
+		isQuirk
+			? [{ value: 1, label: '1' }]
+			: [
+					{ value: 1, label: '1' },
+					{ value: 2, label: '2' },
+					{ value: 3, label: '3' },
+					{ value: 4, label: '4' },
+					{ value: 5, label: '5' }
+				]
+	)
+
+	// Get skills available for each slot
+	function getSkillsForSlot(slot: number): ArtifactSkill[] {
+		if (!skillsQuery.data) return []
+		const group = getSkillGroupForSlot(slot)
+		return skillsQuery.data.filter((s) => s.skillGroup === group)
+	}
+
+	// Push modifier selection pane for a specific slot
+	function handleSelectModifier(slot: number) {
+		const config: PaneConfig = {
+			id: `modifier-select-${slot}`,
+			title: `Select Skill ${slot}`,
+			component: ArtifactModifierList,
+			props: {
+				slot,
+				selectedModifier: skills[slot - 1]?.modifier,
+				onSelect: (skill: ArtifactSkill) => handleModifierSelected(slot, skill)
+			}
+		}
+		paneStack.push(config)
+	}
+
+	// Handle when a modifier is selected from the list
+	function handleModifierSelected(slot: number, skill: ArtifactSkill) {
+		const index = slot - 1
+		const newSkills = [...skills]
+
+		// Create new skill instance with first available strength and level 1
+		const firstStrength = skill.baseValues.find((v) => v !== null && v !== 0) ?? 0
+		newSkills[index] = {
+			modifier: skill.modifier,
+			strength: firstStrength,
+			level: 1
+		}
+
+		skills = newSkills
+
+		// Pop back to the root pane
+		paneStack.pop()
+	}
+
+	// Handle skill updates from skill row
+	function handleUpdateSkill(slot: number, update: Partial<ArtifactSkillInstance>) {
+		const index = slot - 1
+		const currentSkill = skills[index]
+		if (!currentSkill) return
+
+		const newSkills = [...skills]
+		newSkills[index] = { ...currentSkill, ...update }
+		skills = newSkills
+	}
+
+	// Handle proficiency change - reset artifact selection
+	function handleProficiencyChange(newProficiency: number | undefined) {
+		proficiency = newProficiency
+		// Reset artifact selection when proficiency changes
+		selectedArtifactId = undefined
+		skills = [null, null, null, null]
+	}
+
+	// Handle artifact selection change
+	function handleArtifactChange(newArtifactId: string | undefined) {
+		selectedArtifactId = newArtifactId
+		// Reset skills when artifact changes
+		skills = [null, null, null, null]
+		// Reset level for quirk
+		const artifact = artifactsQuery.data?.find(a => a.id === newArtifactId)
+		if (artifact && isQuirkArtifact(artifact)) {
+			level = 1
+		}
+	}
+
+	// Validate form
+	const isValid = $derived(
+		proficiency !== undefined &&
+		element !== undefined &&
+		selectedArtifactId !== undefined
+	)
+
+	// Handle save
+	async function handleSave() {
+		if (!selectedArtifactId || !isValid || element === undefined) return
+
+		const input: CollectionArtifactInput = {
+			artifactId: selectedArtifactId,
+			element,
+			level,
+			nickname: nickname.trim() || undefined,
+			// For quirk artifacts, send the user-selected proficiency
+			proficiency: isQuirk ? proficiency : undefined,
+			skill1: skills[0] ?? undefined,
+			skill2: skills[1] ?? undefined,
+			skill3: skills[2] ?? undefined,
+			skill4: skills[3] ?? undefined
+		}
+
+		createMutation.mutate(input, {
+			onSuccess: () => {
+				onSuccess?.()
+				onClose?.()
+			}
+		})
+	}
+</script>
+
+<div class="add-artifact-sidebar">
+	<div class="form-sections">
+		<DetailsSection title="Base Properties">
+			<DetailRow label="Proficiency" noHover>
+				<Select
+					options={proficiencyOptions}
+					value={proficiency}
+					onValueChange={handleProficiencyChange}
+					size="small"
+					contained
+					placeholder="Select proficiency"
+				/>
+			</DetailRow>
+
+			<DetailRow label="Element" noHover>
+				<Select
+					options={elementOptions}
+					value={element}
+					onValueChange={(v) => (element = v)}
+					size="small"
+					contained
+					placeholder="Select element"
+				/>
+			</DetailRow>
+		</DetailsSection>
+
+		{#if proficiency !== undefined}
+			<DetailsSection title="Artifact">
+				<div class="artifact-select">
+					{#if artifactsQuery.isPending}
+						<p class="loading">Loading artifacts...</p>
+					{:else if artifactsQuery.isError}
+						<p class="error">Failed to load artifacts</p>
+					{:else if artifactOptions.length === 0}
+						<p class="empty">No artifacts available for this proficiency</p>
+					{:else}
+						<Select
+							options={artifactOptions}
+							value={selectedArtifactId}
+							onValueChange={handleArtifactChange}
+							placeholder="Select artifact..."
+							size="medium"
+							fullWidth
+							contained
+						/>
+					{/if}
+				</div>
+			</DetailsSection>
+		{/if}
+
+		{#if selectedArtifact}
+			<DetailsSection title="Configuration">
+				<DetailRow label="Level" noHover>
+					<Select
+						options={levelOptions}
+						value={level}
+						onValueChange={(v) => v !== undefined && (level = v)}
+						size="small"
+						contained
+					/>
+				</DetailRow>
+
+				<DetailRow label="Nickname" noHover>
+					<Input
+						bind:value={nickname}
+						placeholder="Optional nickname"
+						maxLength={50}
+					/>
+				</DetailRow>
+			</DetailsSection>
+
+			{#if !isQuirk}
+				<DetailsSection title="Skills">
+					<div class="skills-list">
+						{#each [1, 2, 3, 4] as slot}
+							<ArtifactSkillRow
+								{slot}
+								skill={skills[slot - 1] ?? null}
+								availableSkills={getSkillsForSlot(slot)}
+								onSelectModifier={() => handleSelectModifier(slot)}
+								onUpdateSkill={(update) => handleUpdateSkill(slot, update)}
+							/>
+						{/each}
+					</div>
+				</DetailsSection>
+			{/if}
+		{/if}
+	</div>
+
+	<div class="form-footer">
+		<Button variant="secondary" onclick={onClose}>Cancel</Button>
+		<Button
+			variant="primary"
+			onclick={handleSave}
+			disabled={!isValid || createMutation.isPending}
+		>
+			{createMutation.isPending ? 'Adding...' : 'Add to Collection'}
+		</Button>
+	</div>
+</div>
+
+<style lang="scss">
+	@use '$src/themes/colors' as colors;
+	@use '$src/themes/spacing' as spacing;
+	@use '$src/themes/typography' as typography;
+	@use '$src/themes/layout' as layout;
+
+	.add-artifact-sidebar {
+		display: flex;
+		flex-direction: column;
+		height: 100%;
+	}
+
+	.form-sections {
+		flex: 1;
+		display: flex;
+		flex-direction: column;
+		gap: spacing.$unit-3x;
+		overflow-y: auto;
+		padding-bottom: spacing.$unit-4x;
+	}
+
+	.artifact-select {
+		padding: spacing.$unit;
+	}
+
+	.loading,
+	.error,
+	.empty {
+		padding: spacing.$unit-2x;
+		text-align: center;
+		color: colors.$grey-50;
+	}
+
+	.error {
+		color: colors.$error;
+	}
+
+	.skills-list {
+		display: flex;
+		flex-direction: column;
+		gap: spacing.$unit;
+		padding: 0 spacing.$unit;
+	}
+
+	.form-footer {
+		display: flex;
+		gap: spacing.$unit-2x;
+		padding: spacing.$unit-2x;
+		border-top: 1px solid var(--border-secondary);
+		flex-shrink: 0;
+
+		:global(button) {
+			flex: 1;
+		}
+	}
+</style>
diff --git a/src/lib/features/collection/openAddArtifactSidebar.ts b/src/lib/features/collection/openAddArtifactSidebar.ts
new file mode 100644
index 00000000..07f6da62
--- /dev/null
+++ b/src/lib/features/collection/openAddArtifactSidebar.ts
@@ -0,0 +1,23 @@
+import { sidebar } from '$lib/stores/sidebar.svelte'
+import AddArtifactSidebar from '$lib/components/sidebar/AddArtifactSidebar.svelte'
+
+/**
+ * Opens the Add Artifact sidebar for adding a new artifact to the collection.
+ *
+ * Uses the pane stack pattern - the root pane allows artifact selection and
+ * configuration, with skill modifier selection pushing additional panes.
+ */
+export function openAddArtifactSidebar(options?: { onSuccess?: () => void }) {
+	const handleClose = () => {
+		sidebar.close()
+	}
+
+	sidebar.openWithComponent('Add Artifact', AddArtifactSidebar, {
+		onSuccess: options?.onSuccess,
+		onClose: handleClose
+	})
+}
+
+export function closeAddArtifactSidebar() {
+	sidebar.close()
+}
diff --git a/src/routes/(app)/[username]/collection/+layout.svelte b/src/routes/(app)/[username]/collection/+layout.svelte
index 916f4b31..270a65d6 100644
--- a/src/routes/(app)/[username]/collection/+layout.svelte
+++ b/src/routes/(app)/[username]/collection/+layout.svelte
@@ -8,6 +8,7 @@
 	import Button from '$lib/components/ui/Button.svelte'
 	import Icon from '$lib/components/Icon.svelte'
 	import AddToCollectionModal from '$lib/components/collection/AddToCollectionModal.svelte'
+	import { openAddArtifactSidebar } from '$lib/features/collection/openAddArtifactSidebar'
 
 	let { data, children }: { data: LayoutData; children: any } = $props()
 
@@ -26,13 +27,16 @@
 	const modalEntityType = $derived.by((): 'character' | 'weapon' | 'summon' | undefined => {
 		if (activeEntityType === 'weapons') return 'weapon'
 		if (activeEntityType === 'summons') return 'summon'
-		if (activeEntityType === 'artifacts') return undefined // Artifacts use different flow
+		if (activeEntityType === 'artifacts') return undefined // Artifacts use sidebar instead
 		return 'character'
 	})
 
-	// Whether the current entity type supports the add modal
+	// Whether the current entity type supports the add modal (all except artifacts)
 	const supportsAddModal = $derived(activeEntityType !== 'artifacts')
 
+	// Whether to show the add button for artifacts (uses sidebar instead of modal)
+	const isArtifacts = $derived(activeEntityType === 'artifacts')
+
 	// Dynamic button text
 	const addButtonText = $derived(`Add ${activeEntityType}`)
 
@@ -41,6 +45,10 @@
 	function handleTabChange(value: string) {
 		goto(`/${username}/collection/${value}`)
 	}
+
+	function handleAddArtifact() {
+		openAddArtifactSidebar()
+	}
 </script>
 
 <svelte:head>
@@ -80,6 +88,16 @@
 			>
 				{addButtonText}
 			</Button>
+		{:else if data.isOwner && isArtifacts}
+			<Button
+				variant="primary"
+				size="small"
+				onclick={handleAddArtifact}
+				icon="plus"
+				iconPosition="left"
+			>
+				Add artifact
+			</Button>
 		{/if}
 	</nav>