diff --git a/frontend/src/api/branches.ts b/frontend/src/api/branches.ts
new file mode 100644
index 00000000..8ed391f3
--- /dev/null
+++ b/frontend/src/api/branches.ts
@@ -0,0 +1,67 @@
+import apiClient from './client'
+import type {
+  BranchTreeResponse,
+  ForkCreateRequest,
+  ForkPointResponse,
+  BranchSwitchResponse,
+  ReviveRequest,
+  BranchMessageRequest,
+  BranchMessageResponse,
+} from '@/types/branching'
+
+export const branchesApi = {
+  async getBranches(sessionId: string): Promise<BranchTreeResponse> {
+    const response = await apiClient.get<BranchTreeResponse>(
+      `/ai-sessions/${sessionId}/branches`
+    )
+    return response.data
+  },
+
+  async createFork(sessionId: string, data: ForkCreateRequest): Promise<ForkPointResponse> {
+    const response = await apiClient.post<ForkPointResponse>(
+      `/ai-sessions/${sessionId}/branches/fork`,
+      data
+    )
+    return response.data
+  },
+
+  async updateBranchStatus(
+    sessionId: string,
+    branchId: string,
+    status: string,
+    reason?: string
+  ): Promise<void> {
+    await apiClient.patch(
+      `/ai-sessions/${sessionId}/branches/${branchId}/status`,
+      { status, reason }
+    )
+  },
+
+  async switchBranch(sessionId: string, branchId: string): Promise<BranchSwitchResponse> {
+    const response = await apiClient.post<BranchSwitchResponse>(
+      `/ai-sessions/${sessionId}/branches/${branchId}/switch`
+    )
+    return response.data
+  },
+
+  async reviveBranch(sessionId: string, branchId: string, data: ReviveRequest): Promise<void> {
+    await apiClient.post(
+      `/ai-sessions/${sessionId}/branches/${branchId}/revive`,
+      data
+    )
+  },
+
+  async sendBranchMessage(
+    sessionId: string,
+    branchId: string,
+    data: BranchMessageRequest
+  ): Promise<BranchMessageResponse> {
+    const response = await apiClient.post<BranchMessageResponse>(
+      `/ai-sessions/${sessionId}/branches/${branchId}/message`,
+      data
+    )
+    return response.data
+  },
+}
+
+export default branchesApi
diff --git a/frontend/src/api/handoffs.ts b/frontend/src/api/handoffs.ts
new file mode 100644
index 00000000..d85ae992
--- /dev/null
+++ b/frontend/src/api/handoffs.ts
@@ -0,0 +1,39 @@
+import apiClient from './client'
+import type {
+  HandoffCreateRequest,
+  HandoffResponse,
+  QueueItemResponse,
+} from '@/types/branching'
+
+export const handoffsApi = {
+  async createHandoff(sessionId: string, data: HandoffCreateRequest): Promise<HandoffResponse> {
+    const response = await apiClient.post<HandoffResponse>(
+      `/ai-sessions/${sessionId}/handoff`,
+      data
+    )
+    return response.data
+  },
+
+  async listHandoffs(sessionId: string): Promise<HandoffResponse[]> {
+    const response = await apiClient.get<HandoffResponse[]>(
+      `/ai-sessions/${sessionId}/handoffs`
+    )
+    return response.data
+  },
+
+  async claimHandoff(handoffId: string): Promise<HandoffResponse> {
+    const response = await apiClient.post<HandoffResponse>(
+      `/handoffs/${handoffId}/claim`
+    )
+    return response.data
+  },
+
+  async getQueue(params?: { intent?: 'park' | 'escalate'; limit?: number }): Promise<QueueItemResponse[]> {
+    const response = await apiClient.get<QueueItemResponse[]>('/handoffs/queue', {
+      params,
+    })
+    return response.data
+  },
+}
+
+export default handoffsApi
diff --git a/frontend/src/api/index.ts b/frontend/src/api/index.ts
index 904792dd..b362e193 100644
--- a/frontend/src/api/index.ts
+++ b/frontend/src/api/index.ts
@@ -32,3 +32,6 @@ export { publicTemplatesApi } from './publicTemplates'
 export { uploadsApi, default as uploadsApiDefault } from './uploads'
 export { scriptBuilderApi } from './scriptBuilder'
 export { betaFeedbackApi } from './betaFeedback'
+export { branchesApi } from './branches'
+export { handoffsApi } from './handoffs'
+export { resolutionsApi } from './resolutions'
diff --git a/frontend/src/api/resolutions.ts b/frontend/src/api/resolutions.ts
new file mode 100644
index 00000000..6c5a9f15
--- /dev/null
+++ b/frontend/src/api/resolutions.ts
@@ -0,0 +1,42 @@
+import apiClient from './client'
+import type {
+  AllResolutionOutputsResponse,
+  ResolutionOutputResponse,
+  ResolutionOutputEditRequest,
+  ResolutionOutputPushRequest,
+} from '@/types/branching'
+
+export const resolutionsApi = {
+  async getOutputs(sessionId: string): Promise<AllResolutionOutputsResponse> {
+    const response = await apiClient.get<AllResolutionOutputsResponse>(
+      `/ai-sessions/${sessionId}/resolution-outputs`
+    )
+    return response.data
+  },
+
+  async editOutput(
+    sessionId: string,
+    outputId: string,
+    data: ResolutionOutputEditRequest
+  ): Promise<ResolutionOutputResponse> {
+    const response = await apiClient.patch<ResolutionOutputResponse>(
+      `/ai-sessions/${sessionId}/resolution-outputs/${outputId}`,
+      data
+    )
+    return response.data
+  },
+
+  async pushOutput(
+    sessionId: string,
+    outputId: string,
+    data: ResolutionOutputPushRequest
+  ): Promise<ResolutionOutputResponse> {
+    const response = await apiClient.post<ResolutionOutputResponse>(
+      `/ai-sessions/${sessionId}/resolution-outputs/${outputId}/push`,
+      data
+    )
+    return response.data
+  },
+}
+
+export default resolutionsApi