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docs/plans/sprint_1_story_2_task_1.md

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+# Task 5: Create API Client Services
+
+**Task ID**: TASK-005 | **Story**: [STORY-002](sprint_1_story_2.md) | **Sprint**: [Sprint 1](sprint_1.md)
+**Estimated Hours**: 4h | **Assignee**: Frontend Developer 2 | **Priority**: P0 | **Status**: Not Started
+
+## Task Description
+Create TypeScript API client services for Epic/Story/Task with CRUD operations, authentication, and error handling.
+
+## Implementation
+
+### File Structure
+```
+src/api/
+├── clients/
+│   ├── EpicApiClient.ts
+│   ├── StoryApiClient.ts
+│   └── TaskApiClient.ts
+├── types.ts
+└── axiosInstance.ts
+```
+
+### Example: EpicApiClient.ts
+```typescript
+import { axiosInstance } from '../axiosInstance';
+import { Epic, CreateEpicDto, UpdateEpicDto } from '../types';
+
+export class EpicApiClient {
+  async getAll(projectId: string): Promise<Epic[]> {
+    const { data } = await axiosInstance.get(`/epics?projectId=${projectId}`);
+    return data;
+  }
+
+  async getById(id: string): Promise<Epic> {
+    const { data } = await axiosInstance.get(`/epics/${id}`);
+    return data;
+  }
+
+  async create(dto: CreateEpicDto): Promise<Epic> {
+    const { data } = await axiosInstance.post('/epics', dto);
+    return data;
+  }
+
+  async update(id: string, dto: UpdateEpicDto): Promise<Epic> {
+    const { data } = await axiosInstance.put(`/epics/${id}`, dto);
+    return data;
+  }
+
+  async delete(id: string): Promise<void> {
+    await axiosInstance.delete(`/epics/${id}`);
+  }
+}
+
+export const epicApiClient = new EpicApiClient();
+```
+
+## Acceptance Criteria
+- [ ] EpicApiClient with 5 CRUD methods
+- [ ] StoryApiClient with 5 CRUD methods
+- [ ] TaskApiClient with 5 CRUD methods
+- [ ] JWT authentication in Axios interceptor
+- [ ] Error handling and TypeScript types
+
+## Deliverables
+1. 3 API client classes
+2. TypeScript types/interfaces
+3. Axios instance with auth
+4. Unit tests (15+ tests)
+
+**Status**: Not Started | **Created**: 2025-11-04