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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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agent design

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API & SDK/2026-06-28Advanced

Every Tool Call Succeeds, Yet Nothing Moves Forward: Detecting Stagnation in Unattended Agents

No errors, yet the agent keeps replaying the same move while your budget quietly drains. Here is how to detect a success-but-no-progress loop using a progress oracle and action fingerprints, with a working Python implementation that halts safely.

Claude Code/2026-04-27Advanced

Claude Code Hooks: A Complete Field Guide to All 8 Hook Types and How to Pick the Right One

Claude Code hooks are powerful, but most people give up before figuring out which event does what. Here's the field guide I wish I had when I started — six months of running hooks in production, distilled.

Claude Code/2026-04-24Intermediate

Claude Code's TodoList Quality Comes Down to Task Granularity — Patterns That Actually Worked

The TodoList tool in Claude Code can backfire when used carelessly. Three field-tested patterns — task granularity, verification steps, and update timing — that shift the output from 'looks organized' to 'actually delivered'.

API & SDK/2026-04-24Advanced

Giving Claude Agents Long-Term Memory in Production — Seven Pitfalls and the Patterns That Fix Them

A production playbook for Claude agents with long-term memory — seven pitfalls that break memory agents live, and the design patterns that fix each one.