◉CLAUDE LABJP
●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 /subtask●LIMITS — 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 own●MCPBG — 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_MS●PLANFIX — Fixed plan mode auto-running file-modifying Bash commands such as touch and rm without a permission prompt or an SDK canUseTool callback●SONNET5 — 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 $15●IPO — Bankers are reportedly lining up investor meetings for Anthropic ahead of a possible public listing as soon as October●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 /subtask●LIMITS — 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 own●MCPBG — 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_MS●PLANFIX — Fixed plan mode auto-running file-modifying Bash commands such as touch and rm without a permission prompt or an SDK canUseTool callback●SONNET5 — 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 $15●IPO — Bankers are reportedly lining up investor meetings for Anthropic ahead of a possible public listing as soon as October
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Anthropic SDK

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Claude API4Automation1Fallback1Scheduled Jobs1Beta Features1Production1Resilience1Streaming1TypeScript1Error Handling1errors1beginners1
⬡ API & SDK/2026-06-16Advanced

Confirm Your Model Actually Responds Before a Scheduled Run Begins

A model you configured can be gone before your nightly job even wakes up. Tell retirement, withdrawal, and regional restriction apart with a single startup probe, then rewrite the run config to an eligible model — with complete, working TypeScript.

⬡ API & SDK/2026-06-15Advanced

Centralizing the anthropic-beta Header So a Retired Beta Won't Kill Your Batch

Scattered anthropic-beta headers turn a beta retirement or GA graduation into a 400 that takes down an entire batch. A small capability registry, a startup preflight, and tiered fallback keep your pipeline running across feature generations.

⬡ API & SDK/2026-04-20Advanced

Three Hidden Pitfalls When Implementing Claude API Streaming

Real-world lessons from building with Claude API streaming: runtime environment mismatches, error handling gaps, and silent token cost overruns — with working TypeScript examples.

⬡ API & SDK/2026-03-21Beginner

First Claude API Call Failing? Common Error FAQ

Claude API beginner's error resolution guide. Covers 401 authentication errors, 429 rate limiting, 400 bad requests, empty responses, streaming failures, tool_use errors, context window exceeded, tool_result submission, and Spanner temporarily unavailable issues.