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Deep dives into Claude Code mastery. From foundational concepts to advanced techniques.

251 articles
Updated Jul 19, 2026
251 articles
AI Coding Models

AI Coding Models & Agent Tools: The July 2026 State of Play

A practical July 19, 2026 snapshot of Claude, GPT, Gemini, and Grok coding models—and the Claude Code, Codex, Antigravity, Jules, and Grok Build agent stacks around them.

Jul 19, 2026 · 14 min read
CMS Multi-Agent

Why We Rarely Discuss New Graph, Loop, and Harness Engines

Claude Code, Codex, and Grok keep improving the inner loop. CMS moved process control, checkpoints, retries, and recovery into an external control plane in 2025.

Jul 19, 2026 · 8 min read

Claude Code v2.1.204: Headless SessionStart Hook Streaming Fix

Claude Code v2.1.204 is a focused maintenance release that fixes hook events not streaming during SessionStart hooks in headless sessions, preventing remote workers from being idle-reaped mid-hook.

Jul 8, 2026 · 10 min read
fable-5 mythos-5

Claude Fable 5 & Mythos 5: Anthropic's Mythos-Class Tier, Explained

Anthropic's Claude Fable 5 and Mythos 5 explained: the new Mythos-class tier above Opus, why the same model ships two ways, and what it means for Claude Code.

Jul 8, 2026 · 9 min read
ultracode effort

Ultracode & Effort Levels: Turning Claude Code Up to Eleven

Learn Claude Code effort levels (low to xhigh) and ultracode: how to opt in, monitor workflow cost, choose per-agent effort, and know when to go big.

Jul 8, 2026 · 10 min read
workflow orchestration

What Is a Workflow? Claude Code's Multi-Agent Orchestration, Explained

What is a Workflow in Claude Code? Multi-agent orchestration explained: a repeatable JavaScript control flow coordinating subagents, with a worked example.

Jul 8, 2026 · 11 min read
models claude-code

Which Claude Model Should You Use in 2026? Fable 5, Opus 4.8, Sonnet 5 & Haiku 4.5

Practical guide to choosing between Claude Fable 5, Opus 4.8, Sonnet 5, and Haiku 4.5 in Claude Code — plus fast mode, tier mixing, and effort levels.

Jul 8, 2026 · 12 min read

Claude Code v2.1.203: Background Agent Reliability Overhaul and Performance Gains

Claude Code v2.1.203 delivers a login expiry warning, a manual permission mode badge, MCP roots for additional working directories, and a large batch of background session, worktree, and performance fixes.

Jul 7, 2026 · 10 min read

Claude Code v2.1.202: Workflow Controls, Telemetry, and Remote Control Fixes

Claude Code v2.1.202 adds a dynamic workflow size setting and OpenTelemetry workflow attributes, plus a large batch of fixes for Remote Control, session management, and network reliability.

Jul 6, 2026 · 10 min read

Claude Code v2.1.200: Manual Permission Mode and Background Agent Reliability

Claude Code v2.1.200 renames the default permission mode to Manual, stops AskUserQuestion dialogs from auto-continuing, and ships a wave of background agent and accessibility fixes.

Jul 3, 2026 · 10 min read

Claude Code v2.1.201: Harness Reminder Change for Claude Sonnet 5 Sessions

Claude Code v2.1.201 is a focused update that changes how harness reminders are delivered in Claude Sonnet 5 sessions, no longer using the mid-conversation system role.

Jul 3, 2026 · 10 min read

Claude Code v2.1.199: Stacked Skill Invocations and Major Reliability Fixes for Subagents and Background Agents

Claude Code v2.1.199 lets stacked slash-skill invocations load multiple skills, adds automatic retry for transient rate-limit errors, and delivers extensive reliability fixes for subagents, background agents, and streaming responses.

Jul 2, 2026 · 10 min read

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