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Engineering: backend-engineering, frontend-engineering, data-engineering, ml-engineering, platform-engineering, qa-methodology Executive: go-to-market, legal-strategy, operational-design, org-design, product-strategy ml-engineering: added missing training-infrastructure.md reference qa-methodology: added test-data-management, performance-testing, security-testing references All frontmatter converted to agent-skills convention. Source: https://github.com/magnus919/hermes-profiles
36 lines
1.6 KiB
Markdown
36 lines
1.6 KiB
Markdown
# API Integration
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## API Client Design
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| Layer | Responsibility |
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|-------|---------------|
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| Client instance | Base URL, default headers, timeout, interceptors |
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| Request interceptor | Auth token injection, request logging, request ID |
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| Response interceptor | Token refresh on 401, error normalization, response logging |
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| Service module | Typed API methods per domain, request/response transformation |
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| Hook layer | Data fetching hooks with loading/error/empty states |
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## Auth Token Flow
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```
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Login → Store token → Attach to requests → Detect expiry → Refresh → Retry
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↓
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Re-login on refresh failure
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```
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| Storage location | Pros | Cons |
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|-----------------|------|------|
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| HTTP-only cookie | Secure against XSS | CSRF vulnerability, harder for SPA to read |
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| Memory (variable) | Most secure, not persisted | Lost on page refresh |
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| localStorage | Survives refresh, simple | Accessible by any JS on the page |
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| Session storage | Survives refresh in same tab | Cleared on tab close |
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## Real-Time Updates
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| Protocol | When to use | Connection management |
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|----------|-------------|---------------------|
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| WebSocket | Bidirectional, low-latency | Reconnect with backoff, heartbeat, fallback to polling |
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| SSE (Server-Sent Events) | Server-to-client only, simpler than WebSocket | Automatic reconnection, event ID for resume |
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| Short polling | Simple, no server push support | Fixed interval, wasteful when idle |
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| Long polling | When WebSocket/SSE unavailable | Persistent connection, complex timeout handling |
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