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    <title>0Guhn Tech Blog (en)</title>
    <link>https://youngguhn.com/en</link>
    <description>Personal Archive - Tinkering, daily life, and niche records</description>
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    <lastBuildDate>Sun, 01 Mar 2026 06:37:10 GMT</lastBuildDate>
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        <title><![CDATA[Git Undo Complete Guide - restore, reset, revert Differences Explained]]></title>
        <link>https://youngguhn.com/en/blog/git-learn-day4</link>
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        <pubDate>Mon, 09 Feb 2026 00:00:00 GMT</pubDate>
        <description><![CDATA[Git undo trio restore, reset, revert explained with post office analogy. A complete guide for handling mistakes in every situation.]]></description>
        <author>0Guhn</author>
        <category>git</category><category>version-control</category><category>git-learn</category><category>git-restore</category><category>git-reset</category><category>git-revert</category><category>undo</category>
      </item>
      <item>
        <title><![CDATA[Claude Opus 4.6 — Agent Teams, /insights, and What's Changed]]></title>
        <link>https://youngguhn.com/en/blog/claude-opus-4-6-swarm-insights</link>
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        <pubDate>Fri, 06 Feb 2026 00:00:00 GMT</pubDate>
        <description><![CDATA[A summary of Agent Teams (Swarm), the /insights skill, and practical changes introduced with the Opus 4.6 release.]]></description>
        <author>0Guhn</author>
        <category>Claude Code</category><category>Opus 4.6</category><category>Agent Teams</category><category>Swarm</category><category>Insights</category><category>AI</category>
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      <item>
        <title><![CDATA[Git Branch and Merge Explained Simply - branch, switch, merge Complete Guide]]></title>
        <link>https://youngguhn.com/en/blog/git-learn-day3</link>
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        <pubDate>Thu, 05 Feb 2026 00:00:00 GMT</pubDate>
        <description><![CDATA[Learn git branch, switch, merge commands with post office analogy. Fast-forward vs 3-way merge difference, conflict resolution included.]]></description>
        <author>0Guhn</author>
        <category>git</category><category>version-control</category><category>git-learn</category><category>git-branch</category><category>git-merge</category><category>conflict</category>
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      <item>
        <title><![CDATA[Git Installation to First Commit - init, add, commit Complete Guide]]></title>
        <link>https://youngguhn.com/en/blog/git-learn-day2</link>
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        <pubDate>Wed, 04 Feb 2026 00:00:00 GMT</pubDate>
        <description><![CDATA[Step-by-step guide from Git installation to first commit. Learn git init, add, commit, status commands with post office analogy.]]></description>
        <author>0Guhn</author>
        <category>git</category><category>version-control</category><category>git-learn</category><category>git-install</category><category>git-config</category><category>git-commit</category>
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      <item>
        <title><![CDATA[What is Git? Why You Need Version Control - Git Basics for Beginners]]></title>
        <link>https://youngguhn.com/en/blog/git-learn-day1</link>
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        <pubDate>Tue, 03 Feb 2026 00:00:00 GMT</pubDate>
        <description><![CDATA[Learn why Git and version control matter with post office analogy. Evolution from local to centralized to distributed version control.]]></description>
        <author>0Guhn</author>
        <category>git</category><category>version-control</category><category>git-learn</category>
      </item>
      <item>
        <title><![CDATA[Vim cgn + . Multiple Replace]]></title>
        <link>https://youngguhn.com/en/blog/vim-cgn-dot</link>
        <guid isPermaLink="true">https://youngguhn.com/en/blog/vim-cgn-dot</guid>
        <pubDate>Tue, 03 Feb 2026 00:00:00 GMT</pubDate>
        <description><![CDATA[How to selectively replace searched words using cgn and dot command.]]></description>
        <author>0Guhn</author>
        <category>vim</category><category>neovim</category><category>cgn</category>
      </item>
      <item>
        <title><![CDATA[Vim Hidden Commands]]></title>
        <link>https://youngguhn.com/en/blog/vim-hidden-gems</link>
        <guid isPermaLink="true">https://youngguhn.com/en/blog/vim-hidden-gems</guid>
        <pubDate>Tue, 03 Feb 2026 00:00:00 GMT</pubDate>
        <description><![CDATA[g series, Ctrl combinations, time-based undo and other useful Vim commands.]]></description>
        <author>0Guhn</author>
        <category>vim</category><category>neovim</category><category>cheatsheet</category>
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      <item>
        <title><![CDATA[When Claude Code CLI Uses 100% CPU — Causes and Solutions]]></title>
        <link>https://youngguhn.com/en/blog/claude-code-cpu-100-fix</link>
        <guid isPermaLink="true">https://youngguhn.com/en/blog/claude-code-cpu-100-fix</guid>
        <pubDate>Sun, 01 Feb 2026 00:00:00 GMT</pubDate>
        <description><![CDATA[Analysis of causes and immediate solutions when the Claude Code CLI process consumes 100% CPU and won't terminate.]]></description>
        <author>0Guhn</author>
        <category>Claude Code</category><category>CPU</category><category>Troubleshooting</category><category>CLI</category><category>macOS</category><category>kill</category>
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      <item>
        <title><![CDATA[Building a Claude Code Multi-Agent System with TEI + Qdrant]]></title>
        <link>https://youngguhn.com/en/blog/mcp-tei-rag</link>
        <guid isPermaLink="true">https://youngguhn.com/en/blog/mcp-tei-rag</guid>
        <pubDate>Thu, 29 Jan 2026 00:00:00 GMT</pubDate>
        <description><![CDATA[I vectorized code with TEI, stored it in Qdrant, and built a system where 9 Claude Code agents search code instead of reading it.]]></description>
        <author>0Guhn</author>
        <category>MCP</category><category>TEI</category><category>RAG</category><category>Qdrant</category><category>Claude Code</category>
      </item>
      <item>
        <title><![CDATA[Tmux Personal Setup to Boost Terminal Productivity]]></title>
        <link>https://youngguhn.com/en/blog/tmux-setting</link>
        <guid isPermaLink="true">https://youngguhn.com/en/blog/tmux-setting</guid>
        <pubDate>Sat, 24 Jan 2026 00:00:00 GMT</pubDate>
        <description><![CDATA[From installation to practical configuration and troubleshooting of Tmux (Terminal Multiplexer), the first tool you should install when setting up your terminal environment.]]></description>
        <author>0Guhn</author>
        <category>tmux</category><category>terminal</category><category>productivity</category>
      </item>
      <item>
        <title><![CDATA[Moving AI Chat Rooms & Handoff]]></title>
        <link>https://youngguhn.com/en/blog/ai-handoff-session</link>
        <guid isPermaLink="true">https://youngguhn.com/en/blog/ai-handoff-session</guid>
        <pubDate>Wed, 21 Jan 2026 00:00:00 GMT</pubDate>
        <description><![CDATA[How to continue conversations on different AI models or new chat rooms without losing context]]></description>
        <author>0Guhn</author>
        <category>AI</category><category>Prompt</category><category>Migration</category><category>Handoff</category>
      </item>
      <item>
        <title><![CDATA[How to Configure Multiple GitHub Accounts with SSH on One Local Machine]]></title>
        <link>https://youngguhn.com/en/blog/git-ssh</link>
        <guid isPermaLink="true">https://youngguhn.com/en/blog/git-ssh</guid>
        <pubDate>Tue, 20 Jan 2026 00:00:00 GMT</pubDate>
        <description><![CDATA[SSH vs HTTPS, How to separate and use personal GitHub accounts]]></description>
        <author>0Guhn</author>
        <category>SSH</category><category>Github</category><category>https</category>
      </item>
      <item>
        <title><![CDATA[Spotlight Search Sluggishness After macOS Tahoe Update]]></title>
        <link>https://youngguhn.com/en/blog/mac-spotlight-slow-fix</link>
        <guid isPermaLink="true">https://youngguhn.com/en/blog/mac-spotlight-slow-fix</guid>
        <pubDate>Sun, 18 Jan 2026 00:00:00 GMT</pubDate>
        <description><![CDATA[Fixing slow Spotlight search after updating to macOS Tahoe.]]></description>
        <author>0Guhn</author>
        <category>Mac</category><category>Tahoe</category><category>Spotlight</category><category>Update</category><category>Performance</category>
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