Your Claude Code has quietly gotten heavy — dead-weight tools eating your context, duplicated rules, slow hooks dragging every turn. There's a new command, /checkup, that acts like a full pit crew and fixes all of it in one pass, confirming with you before every change. This checklist is every fix it makes, in order, with exactly what to look for and what's safe to approve.

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A companion to the video on Claude Code's new /checkup command — the alias for the upgraded /doctor, shipped in v2.1.205. /checkup is a full setup checkup that scans your whole install and can fix what it finds, showing a checklist with status icons and only changing things after you press f and confirm. This one-page field guide turns it into an action list you can run tonight. Inside: all SEVEN fixes in order, each with what to look for and what's safe to approve — (1) STRIP THE DEAD WEIGHT: clean out skills, MCP servers and plugins you connected once and never use, so they stop loading into your context every session (usually the single biggest speed win); (2) DROP THE DUPLICATE: dedup your local CLAUDE.md against the checked-in one so the same rules aren't carried twice; (3) REDISTRIBUTE THE WEIGHT: break one giant root CLAUDE.md into smaller nested files that load only where relevant, and pull reusable instructions out into skills; (4) TUNE THE ENGINE: measure your hooks and turn off the slow ones that lag every single turn; (5) FRESH TYRES: update Claude Code to the latest version (new speed and features ship almost weekly); (6) SHIFT TO A HIGHER GEAR: enable auto mode by default so the agent flows through the safe routine steps and only pauses for decisions that matter; (7) CLEAR THE PIT LANE: pre-approve the safe read-only commands you keep getting asked about (never anything that writes, deletes or pushes). Plus how to run it (type /checkup or /doctor — same command), the golden rule that it confirms before it changes anything, and honest notes on what's verified from the official docs versus the launch note. It's a checkup, not surgery — you always hold the keys.

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