◉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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document processing

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Claude API3TypeScript2Structured Extraction1Data Validation1Production1Cost Optimization1structured extraction1verification1production1Files API1cost optimization1Python1
⬡ API & SDK/2026-07-01Advanced

When Claude API Document Extraction Is Confidently Wrong — Field Notes on Catching Silent Errors with Invariants

In structured extraction from invoices and contracts, the real danger isn't a crash — it's a value that's silently wrong while the schema validates and confidence reads high. Field notes on invariants, two-pass extraction, and tracking field-level error rates.

⬡ API & SDK/2026-06-17Advanced

When Claude API Extracts the Wrong Value With Full Confidence — Designing the Verification Layer

When you extract invoices or contracts with Claude API, the scariest failure isn't an exception — it's plausible-but-wrong JSON. Here is how I build a verification layer that catches silent extraction errors with schema checks, arithmetic reconciliation, and dual-extraction agreement, in TypeScript.

⬡ API & SDK/2026-04-04Intermediate

Claude API Files API — Persist Documents and Slash API Costs

Learn how to use Claude API's Files API to persist documents and avoid re-uploading costs. Upload PDFs and long documents once, reuse them across multiple API requests with this practical implementation guide.