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Boris Cherny Profile picture
@bcherny
Feb 21 • 7 tweets • 3 min read • Read on X
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Introducing: built-in git worktree support for Claude Code

Now, agents can run in parallel without interfering with one other. Each agent gets its own worktree and can work independently.

The Claude Code Desktop app has had built-in support for worktrees for a while, and now we're bringing it to CLI too.

Learn more about worktrees: git-scm.com/docs/git-workt…Image
1/ Use claude --worktree for isolation

To run Claude Code in its own git worktree, just start it with the --worktree option. You can also name your worktree, or have Claude name it for you.

Use this to run multiple parallel Claude Code sessions in the same git repo, without the code edits clobbering each other.

You can also pass the --tmux flag to launch Claude in its own Tmux session.Image
2/ Use worktree mode in the Desktop app

If you prefer not to use terminal, head to the Code tab in the Claude Desktop app and ☑️ worktree mode

code.claude.com/docs/en/deskto…Image
3/ Subagents now support worktrees

Subagents can also use worktree isolation to do more work in parallel. This is especially powerful for large batched changes and code migrations.

To use it, ask Claude to use worktrees for its agents.

Available in CLI, Desktop app, IDE extensions, web, and Claude Code mobile app.Image
4/ Custom agents support git worktrees

You can also make subagents always run in their own worktree. To do that, just add "isolation: worktree" to your agent frontmatter Image
5/ Also available for non-git source control

If you're a Mercurial, Perforce, or SVN user, define worktree hooks to benefit from isolation without having to use Git Image
Update to 2.1.50 and let us know what you think!

claude.com/product/claude…

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More from @bcherny

Boris Cherny Profile picture
Apr 16
Dogfooding Opus 4.7 the last few weeks, I've been feeling incredibly productive. Sharing a few tips to get more out of 4.7 🧵
1/ Auto mode = no more permission prompts

Opus 4.7 loves doing complex, long-running tasks like deep research, refactoring code, building complex features, iterating until it hits a performance benchmark.

In the past, you either had to babysit the model while it did these sorts of long tasks, our use --dangerously-skip-permissions.

We recently rolled out auto mode as a safer alternative. In this mode, permission prompts are routed to a model-based classifier to decide whether the command is safe to run. If it's safe, it's auto-approved.

This means no more babysitting while the model runs. More than that, it means you can run more Claudes in parallel. Once a Claude is cooking, you can switch focus to the next Claude.

Auto mode is now available for Opus 4.7 for Max, Teams, and Enterprise users. Shift-tab to enter auto mode in the CLI, or choose it in the dropdown in Desktop or VSCode.Image
2/ The new /fewer-permission-prompts skill

We've also released a new /fewer-permission-prompts skill. It scans through your session history to find common bash and MCP commands that are safe but caused repeated permission prompts.

It then recommends a list of commands to add to your permissions allowlist.

Use this to tune up your permissions and avoid unnecessary permission prompts, especially if you don't use auto mode.

code.claude.com/docs/en/permis…
Read 8 tweets
Boris Cherny Profile picture
Apr 9
Just got a nice DM from a big enterprise customer using Claude Code in one of the world's biggest codebases

Here's how we made @-mentions 3x faster in large enterprise codebases 🧵 Image
To power file @-mentions in Claude Code, we used to use a custom Rust-based file indexer that we invoked from Claude Code via NAPI. It was pretty fast.
But in big codebases, it would fall over.

So we introduced a new fileSuggestion setting in Claude Code, so customers with large codebases could plug in their custom code index (using SourceGraph, an in-house index, etc.).

code.claude.com/docs/en/settin…
Read 7 tweets
Boris Cherny Profile picture
Apr 3
Starting tomorrow at 12pm PT, Claude subscriptions will no longer cover usage on third-party tools like OpenClaw.

You can still use these tools with your Claude login via extra usage bundles (now available at a discount), or with a Claude API key.
We’ve been working hard to meet the increase in demand for Claude, and our subscriptions weren't built for the usage patterns of these third-party tools. Capacity is a resource we manage thoughtfully and we are prioritizing our customers using our products and API.
Subscribers get a one-time credit equal to your monthly plan cost. If you need more, you can now buy discounted usage bundles. To request a full refund, look for a link in your email tomorrow. support.claude.com/en/articles/13…
Read 4 tweets
Boris Cherny Profile picture
Apr 1
Today we're excited to announce NO_FLICKER mode for Claude Code in the terminal

It uses an experimental new renderer that we're excited about. The renderer is early and has tradeoffs, but already we've found that most internal users prefer it over the old renderer. It also supports mouse events (yes, in a terminal).

Try it: CLAUDE_CODE_NO_FLICKER=1 claude
Some of the upsides:
- No more flickering
- No more jumping
- Constant memory and CPU usage as the conversation grows
- Mouse support! You can now click to move your cursor within the input box. Some other UI elements are also clickable now.
- Nicer selection behavior. eg. when you select code, we no longer include line numbers and UI elements in the selection
There's also downsides:
- Native cmd-f doesn't work. Instead, hit ctrl+o then / to search the transcript (or, use ctrl-r for reverse search)
- Native copy-paste doesn't work. Instead, we copy to the clipboard by default when you make a selection. You can configure this in your settings.json to use ctrl+c instead, if you prefer.
- Scrolling gravity varies by device, and we are in the process of tuning the physics to make it feel good on every terminal
Read 6 tweets
Boris Cherny Profile picture
Mar 30
I wanted to share a bunch of my favorite hidden and under-utilized features in Claude Code. I'll focus on the ones I use the most.

Here goes.
1/ Did you know Claude Code has a mobile app?

Personally, I write a lot of my code from the iOS app. It's a convenient way to make changes without opening a laptop.

Download the Claude app for iOS/Android > Code tab on the left. Image
2/ Move sessions back and forth between mobile/web/desktop and terminal

Run "claude --teleport" or /teleport to continue a cloud session on your machine.

Or run /remote-control to control a locally running session from your phone/web. Personally, I have "Enable Remote Control for all sessions" set in my /config.

code.claude.com/docs/en/remote…
Read 17 tweets
Boris Cherny Profile picture
Feb 28
In the next version of Claude Code..

We're introducing two new Skills: /simplify and /batch. I have been using both daily, and am excited to share them with everyone.

Combined, these kills automate much of the work it used to take to (1) shepherd a pull request to production and (2) perform straightforward, parallelizable code migrations.Image
/simplify

Use parallel agents to improve code quality, tune code efficiency, and ensure CLAUDE.md compliance.

Usage: "hey claude make this code change then run /simplify"
/batch

Interactively plan out code migrations, then execute in parallel using dozens of agents.

Each agent runs with full isolation using git worktrees, testing its work before putting up a PR.

Usage: "/batch migrate src/ from Solid to React"
Read 4 tweets

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