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FORK — Claude Code 2.1.212 changes what /fork does: it copies your conversation into a new background session with its own row in claude agents, so you can keep working. The old in-session subagent is now /subtaskLIMITS — WebSearch calls are now capped at 200 per session by default, and subagent spawns get the same 200 ceiling, so a runaway search or delegation loop stops on its ownMCPBG — MCP tool calls running past two minutes now move to the background automatically, keeping the session usable. Tune the threshold with CLAUDE_CODE_MCP_AUTO_BACKGROUND_MSPLANFIX — Fixed plan mode auto-running file-modifying Bash commands such as touch and rm without a permission prompt or an SDK canUseTool callbackSONNET5 — Claude Sonnet 5 is running on introductory pricing of $2 per million input tokens and $10 per million output. After August 31 it moves to $3 and $15IPO — Bankers are reportedly lining up investor meetings for Anthropic ahead of a possible public listing as soon as OctoberFORK — Claude Code 2.1.212 changes what /fork does: it copies your conversation into a new background session with its own row in claude agents, so you can keep working. The old in-session subagent is now /subtaskLIMITS — WebSearch calls are now capped at 200 per session by default, and subagent spawns get the same 200 ceiling, so a runaway search or delegation loop stops on its ownMCPBG — MCP tool calls running past two minutes now move to the background automatically, keeping the session usable. Tune the threshold with CLAUDE_CODE_MCP_AUTO_BACKGROUND_MSPLANFIX — Fixed plan mode auto-running file-modifying Bash commands such as touch and rm without a permission prompt or an SDK canUseTool callbackSONNET5 — Claude Sonnet 5 is running on introductory pricing of $2 per million input tokens and $10 per million output. After August 31 it moves to $3 and $15IPO — Bankers are reportedly lining up investor meetings for Anthropic ahead of a possible public listing as soon as October
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System Prompt

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Claude AI/2026-07-06Advanced

When Instructions Fade in Long Conversations: Measuring Adherence and Pulling It Back

System-prompt instructions quietly lose their grip as a conversation grows. This piece turns that drift into a number you can track, then fixes it with prompt structure and mid-conversation re-anchoring, backed by runnable code and measured results.

Claude AI/2026-04-30Intermediate

9 Practical Claude System Prompt Examples — Templates That Work in Production

Nine production-ready Claude system prompt templates for support, code review, JSON extraction, education, persona consistency, and more — with the design rationale for each pattern.

Claude AI/2026-04-11Intermediate

The Mastering Claude's Custom Instructions

Master the design, implementation, and optimization of Claude's custom instructions to unlock AI's full potential. From fundamentals to production-ready strategies.

Claude AI/2026-04-11Beginner

Claude Keeps Switching to English: How to Fix Language Response Issues

Frustrated when Claude switches to English mid-conversation? This guide explains why it happens and how to permanently fix language response issues using system prompts, Projects settings, and CLAUDE.md.

Claude AI/2026-03-15Intermediate

AI Partner — Intermediate Guide: Better Prompts, Memory Workarounds, and Multiple Personas

Ready to go deeper? Learn how to write tighter system prompts, work around Claude's memory limits, prevent character breaks, and run multiple AI personas for different parts of your life.