diff --git a/src/lib/api/adapters/artifact.adapter.ts b/src/lib/api/adapters/artifact.adapter.ts
index 81d51653..b9a321b8 100644
--- a/src/lib/api/adapters/artifact.adapter.ts
+++ b/src/lib/api/adapters/artifact.adapter.ts
@@ -244,7 +244,8 @@ export class ArtifactAdapter extends BaseAdapter {
 						skill1: input.skill1,
 						skill2: input.skill2,
 						skill3: input.skill3,
-						skill4: input.skill4
+						skill4: input.skill4,
+						collectionArtifactId: input.collectionArtifactId
 					}
 				}
 			}
@@ -272,6 +273,16 @@ export class ArtifactAdapter extends BaseAdapter {
 		})
 	}
 
+	/**
+	 * Syncs a grid artifact from its linked collection source
+	 */
+	async syncGridArtifact(id: string): Promise<GridArtifact> {
+		const response = await this.request<{ gridArtifact: GridArtifact }>(`/grid_artifacts/${id}/sync`, {
+			method: 'POST'
+		})
+		return response.gridArtifact
+	}
+
 	/**
 	 * Equips a collection artifact onto a character
 	 * This creates a reference to the collection artifact on the grid character
diff --git a/src/lib/api/adapters/grid.adapter.ts b/src/lib/api/adapters/grid.adapter.ts
index c1d136bb..411bd528 100644
--- a/src/lib/api/adapters/grid.adapter.ts
+++ b/src/lib/api/adapters/grid.adapter.ts
@@ -29,6 +29,8 @@ export interface CreateGridWeaponParams {
 	mainhand?: boolean | undefined
 	uncapLevel?: number | undefined
 	transcendenceStep?: number | undefined
+	/** Optional reference to source collection weapon for syncing */
+	collectionWeaponId?: string | undefined
 }
 
 export interface CreateGridCharacterParams {
@@ -37,6 +39,8 @@ export interface CreateGridCharacterParams {
 	position: number
 	uncapLevel?: number | undefined
 	transcendenceStep?: number | undefined
+	/** Optional reference to source collection character for syncing */
+	collectionCharacterId?: string | undefined
 }
 
 export interface CreateGridSummonParams {
@@ -48,6 +52,8 @@ export interface CreateGridSummonParams {
 	quickSummon?: boolean | undefined
 	uncapLevel?: number | undefined
 	transcendenceStep?: number | undefined
+	/** Optional reference to source collection summon for syncing */
+	collectionSummonId?: string | undefined
 }
 
 /**
@@ -90,6 +96,19 @@ export interface ResolveConflictParams {
 	conflictingIds: string[]
 }
 
+/**
+ * Response from syncing all party items
+ */
+export interface SyncAllPartyItemsResponse {
+	party: import('$lib/types/api/party').Party
+	synced: {
+		characters: number
+		weapons: number
+		summons: number
+		artifacts: number
+	}
+}
+
 /**
  * Character conflict response from API
  */
@@ -463,6 +482,51 @@ export class GridAdapter extends BaseAdapter {
         })
     }
 
+	// Sync operations
+
+	/**
+	 * Syncs a grid character from its linked collection source
+	 */
+	async syncCharacter(id: string, headers?: Record<string, string>): Promise<GridCharacter> {
+		const response = await this.request<{ gridCharacter: GridCharacter }>(`/grid_characters/${id}/sync`, {
+			method: 'POST',
+			headers
+		})
+		return response.gridCharacter
+	}
+
+	/**
+	 * Syncs a grid weapon from its linked collection source
+	 */
+	async syncWeapon(id: string, headers?: Record<string, string>): Promise<GridWeapon> {
+		const response = await this.request<{ gridWeapon: GridWeapon }>(`/grid_weapons/${id}/sync`, {
+			method: 'POST',
+			headers
+		})
+		return response.gridWeapon
+	}
+
+	/**
+	 * Syncs a grid summon from its linked collection source
+	 */
+	async syncSummon(id: string, headers?: Record<string, string>): Promise<GridSummon> {
+		const response = await this.request<{ gridSummon: GridSummon }>(`/grid_summons/${id}/sync`, {
+			method: 'POST',
+			headers
+		})
+		return response.gridSummon
+	}
+
+	/**
+	 * Syncs all linked items in a party from their collection sources
+	 */
+	async syncAllPartyItems(partyId: string, headers?: Record<string, string>): Promise<SyncAllPartyItemsResponse> {
+		return this.request<SyncAllPartyItemsResponse>(`/parties/${partyId}/sync_all`, {
+			method: 'POST',
+			headers
+		})
+	}
+
 	/**
 	 * Clears grid-specific cache
 	 */
diff --git a/src/lib/types/GridCharacter.d.ts b/src/lib/types/GridCharacter.d.ts
index 78c3ee88..4f79144c 100644
--- a/src/lib/types/GridCharacter.d.ts
+++ b/src/lib/types/GridCharacter.d.ts
@@ -11,4 +11,8 @@ export interface GridCharacter {
 		type: Awakening
 		level: number
 	}
+	/** Reference to the source collection character if linked */
+	collectionCharacterId?: string
+	/** Whether the grid item is out of sync with its collection source */
+	outOfSync?: boolean
 }
diff --git a/src/lib/types/GridSummon.d.ts b/src/lib/types/GridSummon.d.ts
index 8c8d99a9..b0ad372a 100644
--- a/src/lib/types/GridSummon.d.ts
+++ b/src/lib/types/GridSummon.d.ts
@@ -7,4 +7,8 @@ export interface GridSummon {
 	uncap_level: number
 	quick_summon: boolean
 	transcendence_step: number
+	/** Reference to the source collection summon if linked */
+	collectionSummonId?: string
+	/** Whether the grid item is out of sync with its collection source */
+	outOfSync?: boolean
 }
diff --git a/src/lib/types/GridWeapon.d.ts b/src/lib/types/GridWeapon.d.ts
index 67a8003b..e767366f 100644
--- a/src/lib/types/GridWeapon.d.ts
+++ b/src/lib/types/GridWeapon.d.ts
@@ -12,4 +12,8 @@ export interface GridWeapon {
 		type: Awakening
 		level: number
 	}
+	/** Reference to the source collection weapon if linked */
+	collectionWeaponId?: string
+	/** Whether the grid item is out of sync with its collection source */
+	outOfSync?: boolean
 }
diff --git a/src/lib/types/api/artifact.ts b/src/lib/types/api/artifact.ts
index c1c354b9..3fa78f04 100644
--- a/src/lib/types/api/artifact.ts
+++ b/src/lib/types/api/artifact.ts
@@ -185,6 +185,10 @@ export interface GridArtifact {
 	grade: ArtifactGrade
 	/** Reference to the base artifact */
 	artifact: Artifact
+	/** Reference to the source collection artifact if linked */
+	collectionArtifactId?: string
+	/** Whether the grid item is out of sync with its collection source */
+	outOfSync?: boolean
 }
 
 // ============================================
@@ -224,6 +228,8 @@ export interface GridArtifactInput {
 	skill2?: ArtifactSkillInstance
 	skill3?: ArtifactSkillInstance
 	skill4?: ArtifactSkillInstance
+	/** Optional reference to source collection artifact for syncing */
+	collectionArtifactId?: string
 }
 
 /**