CLAUDE LABJP
2.1.278 — The auto mode classifier now runs server-side by default on the Claude API, Enterprise, Bedrock, Vertex and Foundry. You are not billed for the classifier, and /status gained an Auto mode server lineTASKOUT — The TaskOutput tool is gone. taskOutputMaxChars and TASK_MAX_OUTPUT_LENGTH no longer do anything, and background output is read with Read instead10/07 — The old management-configuration key spellings are accepted until noon PT on October 7, seventeen days from now. After that, entries that still use them stop working until you rewrite themBUNPANIC — Reports are coming in of the newest build crashing on launch alone. Earlier builds still run on the same machine, which points at the release rather than the environmentNEW — Deciding what belongs in Cowork and what belongs in Claude Code, using the approval boundary as the lineSONNET4.5 — A date in a deprecation table is a floor, not an end date. Sonnet 4.5 is still active and no deprecation notice has been posted2.1.278 — The auto mode classifier now runs server-side by default on the Claude API, Enterprise, Bedrock, Vertex and Foundry. You are not billed for the classifier, and /status gained an Auto mode server lineTASKOUT — The TaskOutput tool is gone. taskOutputMaxChars and TASK_MAX_OUTPUT_LENGTH no longer do anything, and background output is read with Read instead10/07 — The old management-configuration key spellings are accepted until noon PT on October 7, seventeen days from now. After that, entries that still use them stop working until you rewrite themBUNPANIC — Reports are coming in of the newest build crashing on launch alone. Earlier builds still run on the same machine, which points at the release rather than the environmentNEW — Deciding what belongs in Cowork and what belongs in Claude Code, using the approval boundary as the lineSONNET4.5 — A date in a deprecation table is a floor, not an end date. Sonnet 4.5 is still active and no deprecation notice has been posted
ARTICLES

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All (872) Claude AI (141) Claude Code (371) Cowork (63) API & SDK (297)
API & SDK/2026-03-26Advanced

Claude API Cost Optimization Production Guide — Combining Batch API, Prompt Caching, and Adaptive Thinking for Up to 90% Savings

Learn practical implementation patterns to cut Claude API costs by up to 90%. Covers Batch API, Prompt Caching, and Adaptive Thinking strategies, plus production monitoring and budget management.

API & SDK/2026-03-26Intermediate

Building Automated Agentic Loops with Claude SDK Tool Runner

Learn how to use Claude SDK's Tool Runner and Tool Helpers to build automated tool-calling loops (agentic loops) with practical code examples in Python and TypeScript.

API & SDK/2026-03-25Advanced

Claude API Real-time Multimodal Agent Architecture: Design Patterns & Implementation

Master building real-time multimodal agents combining Vision and Tool Use. Learn streaming pipelines, production error handling, and cost optimization patterns with TypeScript and Python examples.

API & SDK/2026-03-25Advanced

Building Edge AI Microservices with Claude API and Cloudflare Workers

Low-latency, highly scalable AI microservices built from Claude API and Cloudflare Workers — edge design patterns with production-ready code.

API & SDK/2026-03-24Intermediate

Claude API Token Counting Guide — How to Estimate Token Usage and Optimize Costs Before Sending Requests

Learn how to use the Claude API Token Counting endpoint to estimate token usage before sending messages. Covers cost management, context window optimization, and production implementation patterns.

API & SDK/2026-03-24Intermediate

Claude API Usage & Cost API: Programmatic Cost Monitoring and Optimization

Learn how to use Anthropic's Usage & Cost Admin API to programmatically monitor, analyze, and optimize your Claude API spending with practical code examples.

API & SDK/2026-03-24Intermediate

Claude Files API Guide — Upload Once, Reference Anywhere in Your API Calls

Learn how to use the Claude Files API to upload PDFs, images, and text once and reference them across calls. Includes Python and TypeScript examples, a production-grade retry helper, real token cost estimates, and hard-won operational tips.

API & SDK/2026-03-23Advanced

Claude API Programmatic Tool Calling (PTC) Production Guide — 10x Faster Multi-Tool Workflows

Master Programmatic Tool Calling (PTC) in the Claude API to dramatically reduce latency and token costs in multi-tool workflows. Learn production patterns combining PTC with Tool Search and Input 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.

API & SDK/2026-03-19Advanced

Claude Code × SaaS Development — Building a Monthly Revenue Pipeline as a Solo Developer

Complete pipeline for developing SaaS products with Claude Code and generating monthly revenue through Stripe subscriptions. From idea validation through MVP construction, payment implementation, and marketing automation.

API & SDK/2026-03-19Advanced

Claude API Advanced Tool Use: Tool Search, Programmatic Tool Calling, and Tool Use Examples

A working walkthrough of Claude API's Tool Search Tool, Programmatic Tool Calling, and Tool Use Examples — starting with the beta header that everything depends on, plus how to read Anthropic's published reduction figures and when to skip each feature.

API & SDK/2026-03-18Advanced

Claude Code Analytics API: Building a Team Productivity Dashboard

A hands-on guide to building a custom productivity dashboard using the Claude Code Analytics Admin API—covering authentication, full pagination, aggregation, cost allocation, and production security.