Context pack: Claude Code: Claude Code reads your codebase, edits files, runs commands and integrates with your development tools. It runs in the terminal, in IDEs, in a desktop app and on the web. Project instructions live in CLAUDE.md files, MCP connects it to outside tools, and hooks run shell commands at set points. The latest release, v2.1.293, made Claude Haiku 5.5 the default Haiku model.
What it means: An AI or a new teammate given this page has the basics and the official links.
Key documents
An agentic coding tool in the terminal, IDE, desktop app and browser.
Install and make a first change
Install the CLI, sign in from your first session and explore your project.
Recipes for exploring code, fixing bugs, refactoring, testing, PRs and parallel sessions.
How Claude remembers your project
CLAUDE.md or AGENTS.md instructions, plus auto memory.
Hundreds of external tools and data sources through the Model Context Protocol.
Shell commands that run at set points, for deterministic control.
Which settings file a key belongs in, and which value wins.
v2.1.293 makes Haiku 5.5 the default Haiku
Also fixes an HTTP MCP memory leak and lost messages in background sessions.
Recent activity
v2.1.293 makes Haiku 5.5 the default Haiku Newest
Also fixes an HTTP MCP memory leak and lost messages in background sessions.
An agentic coding tool in the terminal, IDE, desktop app and browser.
Install and make a first change
Install the CLI, sign in from your first session and explore your project.
Recipes for exploring code, fixing bugs, refactoring, testing, PRs and parallel sessions.
How Claude remembers your project
CLAUDE.md or AGENTS.md instructions, plus auto memory.
Hundreds of external tools and data sources through the Model Context Protocol.
Shell commands that run at set points, for deterministic control.
Which settings file a key belongs in, and which value wins.
v2.1.292 adds effort levels for sub-agents
The Agent tool takes an effort parameter, and plugin install can add a marketplace.
v2.1.287 introduces Claude Mods
Plugins may now modify deeper behaviour.
For AI agents
This page is a context pack. Paste its link into Claude, ChatGPT or any assistant to give it this context, or hand an agent the machine-readable version.
- Install it from a terminal, sign in and start in your project; most surfaces need a Claude subscription or Console account.
- CLAUDE.md files give Claude persistent instructions; auto memory keeps notes from your corrections.
- MCP servers connect Claude Code to issue trackers, databases and other tools.
- Hooks run your shell commands when Claude edits files, finishes tasks or needs input.
- Settings are layered from managed settings down to your user file, and the most specific scope wins.