◉CLAUDE LABJP
●2.1.302 — Fork subagents are now on by default in claude -p, the Agent SDK and the desktop app. Turn them off with CLAUDE_CODE_FORK_SUBAGENT=0 (10/16)●2.1.299 — Conversations over 200K tokens left idle about 54 minutes get compacted; MCP allow rules now match only the server they name●SONNET 4.5 — Retires on the Claude API on 11/30, 43 days left. Migrate to Sonnet 5.5●WINDOWS — Reports say hooks break silently only on Japanese-locale Windows; check the character encoding first●FAST MODE — Opus 5.5 fast mode is out of research preview and no longer needs the beta header (10/15)●NEW — I Put a Ten-Line Promise File at the To…●2.1.302 — Fork subagents are now on by default in claude -p, the Agent SDK and the desktop app. Turn them off with CLAUDE_CODE_FORK_SUBAGENT=0 (10/16)●2.1.299 — Conversations over 200K tokens left idle about 54 minutes get compacted; MCP allow rules now match only the server they name●SONNET 4.5 — Retires on the Claude API on 11/30, 43 days left. Migrate to Sonnet 5.5●WINDOWS — Reports say hooks break silently only on Japanese-locale Windows; check the character encoding first●FAST MODE — Opus 5.5 fast mode is out of research preview and no longer needs the beta header (10/15)●NEW — I Put a Ten-Line Promise File at the To…
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⬡ API & SDK/2026-04-14Advanced

Claude API × Kotlin Multiplatform — Building Production AI Features for iOS and Android

Integrating Claude API with Kotlin Multiplatform (KMP) to ship production-quality AI assistant features on iOS and Android. Stream termination, mid-stream error events, retry strategies, expect/actual alignment, and testing — written from an indie developer's production experience.

⬡ API & SDK/2026-04-13Advanced

Building Production Conversational AI with Claude API — Context Management, Long-Term Memory, and Safety Filters

Solve context explosion, memory loss, and safety risks in production chat systems with a three-layer memory architecture and integrated guardrails using Claude API

⬡ API & SDK/2026-04-12Advanced

Testing Claude API Applications — Unit, Integration, and E2E Patterns That Hold Up Against Probabilistic Output

Solve the 'AI output changed and broke my tests' problem for good. Learn to combine mocks, semantic assertions, and snapshot testing into a practical test design pattern for Claude API applications.

◉ Claude AI/2026-04-11Intermediate

What 'Claude Powerup' Actually Means — Choosing Between Pro, Max, and the API

'Claude Powerup' isn't an official feature—it's a community term. Drawing on years of running automated publishing across several sites, here's how to choose between Pro, Max, and the API, and how to live with usage limits honestly.

⬡ API & SDK/2026-04-09Intermediate

Claude Managed Agents: Anthropic's New Agent Infrastructure (April 2026)

Anthropic launched Claude Managed Agents in public beta on April 8, 2026. This guide covers everything: sandboxed execution, authentication, checkpoints, scoped permissions, pricing, and how to get started building production-ready AI agents 10x faster.

⬡ API & SDK/2026-04-01Advanced

Building Production-Ready AI Apps with Claude API × Supabase — pgvector RAG, Realtime Sync & Row Level Security Integration Guide

Build production AI apps with Claude API and Supabase. Implement RAG with pgvector, multi-tenant RLS, and real-time streaming in one integrated architecture.

⬡ API & SDK/2026-03-31Advanced

Building Self-Healing AI Agents with Claude API — Error Detection, Auto-Recovery, and Graceful Degradation Patterns for Production

Learn how to build production-grade AI agents that automatically detect failures and self-heal using Claude API. Covers retry strategies, fallback chains, Supervisor patterns, and observability pipelines.

⬡ API & SDK/2026-03-29Advanced

Claude API Think Tool — Dramatically Improve Tool Call Accuracy with Interleaved Reasoning in Agentic Workflows

Master the Claude API Think Tool pattern. Learn the key differences from Extended Thinking, implement interleaved reasoning in agent loops, and apply production design patterns that improve tool call accuracy by up to 54%.

⬡ API & SDK/2026-03-26Intermediate

Build a PDF Analysis and Summarization App with Claude API — Vision plus Extended Thinking

Learn how to build a PDF analysis and summarization application using Claude API's Vision capabilities and Extended Thinking, with step-by-step Python implementation.

⬡ 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.