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Your Hook Says "Blocking Error" But the File Still Changed? PostToolUse and PreToolUse Don't Actually Block the Same Way  ·  Enabled Auto Mode and Thought You Were Safe? Permission Modes and Sandbox Boundaries Are Two Different Layers — Conflating Them Is How Things Break  ·  Messages API Adds On-Demand Compaction in Beta: Developers Decide When to Compact, Not the System  ·  Claude Cowork and Chat Officially Merge, Launching Claude Docs and Claude Slides Alongside It  ·  Why a Single "hi" Can Burn 20,000+ Tokens in Claude Code: Breaking Down the Fixed Startup Overhead  ·  How to Write Your First Custom Slash Command in Claude Code: A Working Example From Scratch
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Enabled Auto Mode and Thought You Were Safe? Permission Modes and Sandbox Boundaries Are Two Different Layers — Conflating Them Is How Things Break

The sandbox doesn't care what the model chose to run — only what the process actually touches. That's the fundamental difference from permission modes.
Adrian Koch · September 28, 2026
"I turned on Auto Mode, so nothing too bad should happen." Behind that sentence sits a common misunderstanding: treating "whether Claude is allowed to act" and "what Claude can reach once it acts" as the same thing to manage. These are actually two entirely independent layers of defense — one decides whether a given tool call needs your approval first, the other decides what files and network...
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Why a Single "hi" Can Burn 20,000+ Tokens in Claude Code: Breaking Down the Fixed Startup Overhead
Prompt caching saves money, not space — those 20,000-plus tokens still fully...
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Subagents Aren't Smarter Mini-Claudes — They Solve Isolation, Not Capability
A subagent doesn't make Claude know a domain better — it isolates noise...
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When Subagents Actually Help — and When They're Just Overcomplicating a Simple Task
Looking complex doesn't mean it genuinely needs a Subagent — splitting a...
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CLAUDE.md, Rules, Skills, Hooks, Subagents — Which One? Anthropic's Official Seven-Method Decision Framework
Aug 15
"Never do this" written in CLAUDE.md is a hope. Written...
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"The sandbox doesn't care what the model chose to run — only what the process actually touches. That's the fundamental difference from permission modes."
— Claude Skill Me
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