Model Context Protocol Guides: Servers, Specs, and Patterns

The 2026-07-28 spec removes the initialize handshake and Mcp-Session-Id header. A maintainer’s migration guide with before/after request diffs, the new routing headers, the Extensions framework, deprecations, and OAuth 2.1 hardening.

Code mode lets GPT-5.6 write JavaScript that composes your tools in an isolated V8 runtime. How it works in the Responses API, programmatic vs direct calling, real token savings, and how it maps to the MCP code execution pattern.

Claude Tag is Anthropic’s persistent AI teammate in Slack. Wire it into engineering: connect MCP servers, scope channel access, use ambient mode safely, and control token costs.

CVE-2026-42271 chains with the Starlette BadHost bypass (CVE-2026-48710) for unauthenticated RCE on the AI gateway. Detect exposure, upgrade to 1.83.7, rotate every key, and harden the MCP test endpoints.

Three tiers of persistent memory in 2026: CLAUDE.md, MCP servers (agentmemory, claude-mem), and Anthropic’s Memory tool plus Dreaming. Benchmarks and a decision matrix.

Gemini 3.5 Flash beats Gemini 3.1 Pro on agent benchmarks at $1.50/$9 per 1M tokens. When to route tasks from Claude Code, the thinking_level trap, and a 40-line MCP agent.

Practical decision framework for Claude Managed Agents vs the Agent SDK. Pricing breakdown with worked examples, MCP integration notes, and when to pick each option for your workload.

Three MCP servers can eat 72% of a 200K context window. The code execution pattern compares against dynamic toolsets and Tool Search, with a working Python build and Claude Code v2.1.121 alwaysLoad config.

Set up your own personal AI assistant that works on WhatsApp, Telegram, Discord, and more. Self-hosted with persistent memory and proactive notifications.

Learn how to set up and use the Method CRM MCP Server to enable AI assistants like Claude to interact with your CRM data through natural language.