Powerful 24 Claude Code Tips: #claude_code_advent_calendar
Claude Code ships new features almost weekly, and the documentation often struggles to keep pace. If you have been using Claude Code since its early days, you know the feeling of discovering a powerful feature months after it was released, hidden in a CHANGELOG or mentioned casually on X.
I have been tracking Claude Code since March 2025, documenting every update, testing every feature, and sharing insights with the developer community. When December arrived, I decided to compile my knowledge into a Claude Code Advent Calendar: 24 days, 24 essential tips, shared daily on X with the hashtag #claude_code_advent_calendar.
This article consolidates all 24 tips into a single comprehensive guide. Whether you are a Claude Code newcomer or a power user, you will find actionable insights to level up your AI-assisted development workflow.
Anthropic maintains an official Skills plugin for migrating prompts from older Claude models to Opus 4.5. This migration guide reveals interesting behavioral differences in the latest model.
The migration addresses several tendencies specific to Opus 4.5:
Understanding these tendencies helps you craft more effective prompts. Opus 4.5 aggressively uses tools, which can fill your context window even when tool calls are not required. Monitor your agent's behavior closely when switching models.
Find the migration plugin at: anthropics/claude-code/plugins/claude-opus-4-5-migration
The statusline feature displays useful information below the chat input, including model name, Git branch, and custom metrics.
Configure it with /statusline
This configuration uses the ccusage tool to display your API usage directly in the Claude Code interface. The statusline is a small but impactful quality-of-life feature that many users overlook.
Source: Dev.to
