feat: Add deepagents-planning-todos skill for task planning and decomposition using write_todos

feat: Introduce deepagents-setup-configuration skill with comprehensive documentation, project initialization scripts, validation tools, and example templates for setting up Deep Agents in Python and JavaScript

feat: create new langgraph-testing-evaluation skill with comprehensive documentation, including unit/integration testing patterns, trajectory evaluation methods, A/B testing strategies, and sample datasets for LangSmith integration

refactor: Consolidate and update skills in marketplace.json, streamlining plugin structure and enhancing descriptions for langgraph and langsmith skills

refactor: Update plugin name in marketplace.json to align with branding

refactor: Rename plugin in marketplace.json

refactor: Standardize skills array formatting in marketplace.json

refactor: Update claude marketplace.json file

feat: Add .gitignore, AGENTS.md, CLAUDE.md, and update README.md with comprehensive guidelines and structure for LangChain agent skills, including development environment setup and skill management instructions

feat: Introduce langsmith-deployment skill with comprehensive documentation, deployment scripts, configuration templates, and CI/CD integration for LangGraph applications

feat: Add langsmith-trace-analyzer skill with comprehensive documentation and scripts for downloading, analyzing, and organizing LangSmith traces, including advanced filtering and querying patterns

feat: Implement langgraph-error-handling skill with comprehensive error handling strategies, including RetryPolicy, human-in-the-loop escalation, and detailed examples for transient and recoverable errors

feat: Add langgraph-state-management skill with comprehensive state management documentation, including state design workflows, reducer patterns, persistence backends, and schema examples for various application types

feat: Introduce langgraph-agent-patterns skill with multi-agent coordination patterns with detailed implementation guides and examples for supervisor, router, orchestrator-worker, and handoff patterns, and SKILL.md file

feat: Add LangGraph project setup skill files including initialization scripts, configuration templates, documentation and SKILL.md