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Browser Agent

Browser and web automation agents — Browser-use, Playwright MCP, Skyvern and more. Combine LLM vision with DOM control for data extraction, form filling, end-to-end testing, and other browser-driven tasks.

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Agent Rate Limiting and Cost Attack Defense: Token Quotas, Sliding Windows, Attack Vector Practice

Systematic guide to rate limiting and cost attack defense for LLM Agents in production: single-user token quotas, multi-tenant sliding windows, prompt injection amplifying cost, DDoS protection, and integration with LangChain/CrewAI/AutoGen frameworks.

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Anti-Bot and Browser Fingerprinting: Modern Web Scraping Strategies

A systematic deep dive into modern web scraping anti-bot defenses: HTTP layer (curl_cffi for TLS fingerprint), browser layer (Playwright plus stealth), behavior layer (human behavior simulation), covering Cloudflare bypass, proxy IP rotation, Scrapling selector self-healing, and legal compliance boundaries.

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Browser Agent Data Extraction and Form Filling: From LLM Vision to DOM Selectors

A systematic engineering guide to Browser Agent across two high-frequency tasks (structured data extraction and automated form filling). Compares three action localization strategies (vision LLM, DOM selector, hybrid coordinate) and trade-offs across four frameworks: Browser-Use, Stagehand, Playwright MCP, and Skyvern.

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Browser Agents in Practice: Architecture and Pitfalls of AI-Controlled Browsers

Breaking down three abstraction layers for browser automation—from raw Playwright to structured extraction—with production patterns, runnable code, and common pitfalls.

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Web Automation Agent in Practice: Limits and Best Practices of browser-use

A practical breakdown of browser-use strengths and limits in web task automation, with strategies for stable execution and failure recovery.

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Deep Research Agents in Practice: From Single-Shot Search to Iterative Reasoning

Decomposes five open-source deep-research projects across three sub-stages with reusable query-rewriting code.