Skill UI

A comprehensive guide to ensuring robust state management for LangGraph agents. This skill addresses common checkpointing pitfalls (like missing thread_id or non-JSON serializable state) and details best practices for implementing reliable state persistence using MemorySaver or PostgresSaver. It covers thread discipline, schema migration, and time-travel debugging for production-ready applications.

This skill defines canonical, ordered middleware patterns for LangChain and LangGraph agents. It addresses critical production-level LLM deployment issues, including PII leakage across tenants, token budget overconsumption, prompt injection defense (Guardrails), and cache key corruption. Use this to build secure, scalable, and cost-aware AI applications.

A comprehensive guide to advanced, production-ready LLM inference using LangChain 1.0. This skill addresses common pitfalls and bugs when integrating multiple providers (Claude, GPT-4o, Gemini), covering issues like structured output reliability, correct streaming token accounting, and robust handling of complex AIMessage content blocks. It teaches best practices for model initialization, provider routing, and version-safe code implementation.

Provides advanced debugging techniques for Notion API issues that standard troubleshooting cannot resolve. It covers response ID inspection, tracing complex permission chains, detecting property type mismatches, managing pagination edge cases, and resolving block nesting limits across Notion databases and pages. Essential for robust integration development.

This curriculum covers foundational exploitation techniques essential for binary security analysis. Users will learn to control program execution flow, including overwriting EIP/RIP, constructing ROP chains, implementing ret2libc, and shellcode injection. It provides practical, hands-on exercises on stack overflows and heap manipulation in a controlled Linux environment, establishing the core primitives needed before tackling modern mitigation bypasses.

This is a detailed offensive checklist for identifying and exploiting insecure deserialization vulnerabilities across multiple programming languages (Java, Python, PHP, .NET, Node.js, etc.). It covers techniques like gadget chain generation, magic method abuse, type confusion, and modern attack vectors, providing a deep methodology for penetration testing and vulnerability research.

A comprehensive reference and bypass catalog covering modern operating system kernel mitigations such as KASLR, SMAP, SMEP, KPTI, DEP/NX, and CFI. It details how these security mechanisms function, how to detect their presence, and advanced bypass techniques (e.g., side-channel attacks, ROP chains, information leaks). This skill is essential for security professionals conducting deep penetration testing, exploit development, and target hardening assessments.

This comprehensive checklist guides users through identifying and exploiting open redirect vulnerabilities in web applications. It covers parameter identification, advanced bypass techniques (e.g., URL encoding, CRLF injection), and chaining the vulnerability with other flaws like OAuth or SSRF. Ideal for web application penetration testing and bug bounty hunting.

This skill provides implementation patterns for integrating with QuickNode, utilizing blockchain RPC endpoints and the QuickNode SDK. It guides developers on connecting, checking block numbers, and interacting with the Ethereum/Web3 blockchain infrastructure. It is crucial for any developer working on decentralized applications or CI/CD pipelines that require reliable blockchain access.

A comprehensive guide for developers to diagnose and fix common blockchain RPC errors when utilizing QuickNode endpoints. Covers issues such as 'Nonce Too Low', 'Insufficient Funds', 'Gas Estimation Failed', and 'Rate Limited' errors, providing concrete code fixes using ethers.js or viem.

This detailed workflow guides developers through essential Ethereum Virtual Machine (EVM) transaction processes using QuickNode infrastructure. It covers core functionalities such as initiating ETH transfers, calling smart contract write functions, setting up real-time event listeners via WebSocket, and accurately estimating gas costs. It is ideal for building robust decentralized applications (dApps) and blockchain backend services.

This workflow demonstrates how to interact with specialized NFT and ERC-20 token APIs provided by QuickNode. It provides programmatic methods to fetch detailed metadata, check current token balances, and track comprehensive transfer history for blockchain assets. It is essential for developers building decentralized applications (dApps) or integrating advanced Web3 features into their product.