https://www.chenk.top/en/tags/plan-mode/Recent content in Plan-Mode on Chen Kai BlogHugoenSat, 25 Apr 2026 09:00:00 +0000https://www.chenk.top/en/claude-code-learn/08-subagents-worktrees-plan/Sat, 25 Apr 2026 09:00:00 +0000https://www.chenk.top/en/claude-code-learn/08-subagents-worktrees-plan/<p>After hooks, the next thing that changes how Claude Code operates is <em>concurrency control</em>. Not in the threading sense, but in terms of how many tasks it handles, their isolation, and the level of oversight.</p> <p>Three features, in increasing order of trust required.</p> <p><figure class="article-figure"> <img src="https://blog-pic-ck.oss-cn-beijing.aliyuncs.com/posts/en/claude-code-learn/08-subagents-worktrees-plan/illustration_1.png" alt="Claude Code Hands-On (8): Sub-Agents, Worktrees, and Plan Mode — Chapter overview" loading="lazy" decoding="async" class="content-image"> </figure> </p> <hr> <h2 id="plan-mode--the-airlock" class="heading-anchor">Plan mode — the airlock<a href="#plan-mode--the-airlock" class="heading-link" aria-label="Permalink to this section" title="Copy link to this section">#</a> </h2><p>Plan mode is the cheapest of the three. Press <code>Shift+Tab</code> until the indicator says <strong>plan</strong>. The model now plans without taking any actions. It will read, think, propose, and stop. You read the plan. You either approve, edit, or kill it. Only then does it execute.</p>