- Terminal
- The text window where you type commands to your computer. Claude Code lives here.
- CLAUDE.md
- A plain text file Claude Code reads at the start of every session. Your standing rules and commands go in it.
- Subagent
- A helper AI with one job and its own memory that reports a short result back to the main session.
- Hook
- A small script that runs automatically at a fixed moment (before a command, after an edit, when Claude tries to stop). Rules as code.
- Skill
- A folder with a SKILL.md file that teaches Claude a repeatable workflow. Invoke it with /name.
- MCP
- A standard plug that lets Claude use outside services like GitHub, Stripe or a database.
- Token
- The unit AI models bill by. Roughly three quarters of an English word. Prices are quoted per million tokens.
- Prompt caching
- Storing the repeated part of a prompt so the next call reads it at a fraction of the price.
- Batch API
- Sending many requests at once to be answered within 24 hours for half price.
- Arbitrage
- Buying something where it is cheap and selling where it is dear at the same moment. Profit only exists if the gap beats fees and slippage.
- Taker fee
- What an exchange charges when your order takes a price already sitting on the book. The maker fee is for orders that wait.
- Slippage
- The difference between the price you saw and the price you actually got, because the market moved while you filled.
- Order book
- The live list of buy offers (bids) and sell offers (asks) on an exchange. You trade against it, not against the last price.
- Websocket
- A live feed the exchange pushes to you, instead of you asking every few seconds. Faster, which matters for gaps that close in seconds.
- Paper mode / dry-run
- The bot does everything except send real orders. It writes what it would have done so you can check the math with zero risk.
- Routine
- In Grok Bot, a saved task that runs on a schedule. The same idea as a cron job or a Claude Code scheduled task.