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Claude Code: from zero to professional. Tips, tutorials and deep dive guides from an engineer who uses it 12 hours a day.
Stop Claude Code asking for permission (without losing control)
Permission prompts in Claude Code don't go away with one setting. There are five levers (rules, modes, auto mode, the sandbox and bypass inside a container), and this guide puts them in the order that cuts the most prompts for the least risk.
Claude Code first steps: the fundamentals that don't expire
The Claude Code fundamentals that don't expire: install, sessions, context, quota, models, permissions. What you actually need to grasp on day 1.
AI: the joy of missing out on what doesn't matter
You can't keep up with AI, and you shouldn't try. The answer isn't resistance or passive acceptance: go all in, but deep on one thing instead of scattered.
Make Claude Code subagents cheaper: run quick ones at low effort
Claude Code subagents inherit your session's effort: at max, a five-line explanation spent 10,921 output tokens against 586 at low. One line in CLAUDE.md sets the level for each one.
Claude Code flickering in the terminal: stop it without losing the session
Claude Code flickers or jumps to the top of the scrollback when you're on the classic renderer. How to tell which one you're on, switch to fullscreen without losing the conversation, and what changes for search and copy.
Claude Code keeps asking for permission on commands you allowed: the && splits them
Claude Code splits every chained command at its operators and checks each part against your rules. Why `npm run build && npm test` still prompts with `npm test` allowed, what option 2 on the prompt saves, and how to settle it.
Claude Code @ file mentions eat tokens: send the path, not the file
Every @ in Claude Code attaches the whole file before Claude starts. CLAUDE_CODE_DISABLE_FILE_MENTIONS turns it into a path Claude reads with its own tools, and only as much as the question needs.
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