Claude Code ecosystem

Claude Code

Anthropic's AI coding partner that lives in your terminal

Visit official page 日本語で詳しく見る

Popularity

★ 143k

Last update

August 2026

License / pricing

独自(商用)

What it does

It reads your codebase, edits files, runs commands and fixes tests from natural-language instructions. The reference point for agentic coding.

Summary based on the project's own description. The Japanese page has a fuller beginner guide: setup difficulty, what to prepare, and a step-by-step start.

Screenshots & visuals

Before you start

Setup difficultySome setup needed
Command lineRequired
API keyRequired
Sends data onlineYes

Judged automatically from the project's own metadata. Always confirm on the official page.

Claude Code FAQ

Is Claude Code free?: Claude Code itself is free, but it needs an API key for an external AI service. That service charges separately, though some have a free tier.
Do I need to install anything or write code to use Claude Code?: It needs the command line. If you are not comfortable typing commands, expect to get stuck during setup.
Does Claude Code work on a phone?: No. It needs a computer.
Can I use Claude Code commercially?: The licence is 独自(商用). Read the licence text before using it commercially.

How it compares

The conditions that decide whether you can actually use it, side by side.

Tool	Command line	API key	Sends data out	Phone	Commercial use
Claude Code (this page)	Required	Required	Yes	No	Not verified
rtk	Required	Not needed	No	No	Yes
agmsg	Required	Not needed	No	No	Yes
codeseek	Required	Required	Yes	No	Yes

"Sends data out" means your input is uploaded to someone's server. Pick "No" when the material cannot leave your organisation.

Other claude code ecosystem tools

rtk

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agmsg

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codeseek

Call graphs and semantic search, from the terminal

taste-skill

Skills that stop AI-built interfaces from looking like every other one

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Claude Code FAQ

Is Claude Code free?

Claude Code itself is free, but it needs an API key for an external AI service. That service charges separately, though some have a free tier.

Do I need to install anything or write code to use Claude Code?

It needs the command line. If you are not comfortable typing commands, expect to get stuck during setup.

Does Claude Code work on a phone?

No. It needs a computer.

Can I use Claude Code commercially?

The licence is 独自(商用). Read the licence text before using it commercially.

How it compares

The conditions that decide whether you can actually use it, side by side.

Tool	Command line	API key	Sends data out	Phone	Commercial use
Claude Code (this page)	Required	Required	Yes	No	Not verified
rtk	Required	Not needed	No	No	Yes
agmsg	Required	Not needed	No	No	Yes
codeseek	Required	Required	Yes	No	Yes

"Sends data out" means your input is uploaded to someone's server. Pick "No" when the material cannot leave your organisation.