Yejun Su
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Claude Code in Action

https://anthropic.skilljar.com/claude-code-in-action

  • Tips

    • #: set memory
    • @: mention files
    • Ctrl-v: paste image

  • Context

    • Escape: interrupt and redirect the conversation
    • Double-tap Escape: rewind the conversation
    • /compact: summarize current conversation for things learned and continue a related task
    • /clear: dump current conversation and start an unrelated task

  • Intelligence

    • Planning mode for breadth-first tasks
    • Thinking mode for depth-first tasks. Use keywords (sorted from less to more tokens):
      • Think: Basic reasoning
      • Think more: Extended reasoning
      • Think a lot: Comprehensive reasoning
      • Think longer: Extended time reasoning
      • Ultrathink: Maximum reasoning capability

  • Custom commands

    • Create a markdown in .claude/commands/<COMMAND>.md.
    • In the command, use $ARGUMENTS to receive user prompt. For example,
      • Create .claude/commands/test.md: 
        Your task is to write tests for $ARGUMENTS
      • Usage: /test the User model
    • I found if you create commands in ~/.claude/commands/, they become global. For example,
      • Create ~/.claude/commands/backup.md: 
        Create a backup for ~/.claude/CLAUDE.md using gist
      • Use in any conversation: /backup

  • MCP servers

    • Add server 
      claude mcp add playwright npx @playwright/mcp@latest
    • Pre-configure permissions: open the .claude/settings.local.json file and add the server to the allow array: 
      {
  "permissions": {
    "allow": ["mcp__playwright"],
    "deny": []
  }
}
#claude #course