nook
Nook is a free, open-source terminal-native AI IDE distributed as a single Go binary.
What nook is
Nook is a free, open-source terminal-native AI IDE distributed as a single Go binary. Its AI features run through the Claude CLI and include inline edits, multi-file composition, and ghost-text autocomplete. Coding tools include gopls diagnostics, inlay hints, reference search, workspace symbol search, and a server-agnostic language-server wrapper. Project work is supported by inline Git blame, a file picker, project search, a Git pane, and an embedded terminal. Nook reads `.nookrules` at the workspace root and falls back to `.cursorrules` when needed. It runs wherever a shell runs, including SSH, tmux, and containers. AI authentication comes from the configured Claude CLI, such as an OAuth session or `ANTHROPIC_API_KEY`. The editor, picker, search, Git pane, terminal, and LSP continue working without Claude; only AI features require it. Nook uses the MIT license.
Good
- Free and open source under MIT
- Runs over SSH, tmux, and containers
- Includes Git, search, terminal, and LSP tools
- AI supports inline and multi-file editing
- Core editor works without Claude
Watch out
- AI features require the Claude CLI
- AI authentication depends on Claude CLI setup
- Distributed as a terminal-native Go binary
- Default language server is gopls
Who it suits
Nook suits developers who work primarily in terminals, including SSH, tmux, or container environments. It is also suitable for users who want open-source project tools with optional Claude-powered AI features.
Verdict
Nook combines terminal-based editing, project navigation, Git tools, and language-server features with optional Claude integration. Its non-AI tools remain usable when Claude is unavailable.
The facts
Each one read from nook's own pages, with the date it was checked.
What it does
- AI authentication
- nook uses the authentication already configured for the Claude CLI, including an OAuth session or ANTHROPIC_API_KEY.checked 9 Oct 2026
- AI dependency
- The editor, picker, search, Git pane, terminal, and LSP continue to work without Claude; only the AI features require it.checked 4 Oct 2026
- AI features
- Its AI features include inline edits, multi-file composition, and ghost-text autocomplete, driven by the Claude CLI.checked 9 Oct 2026
- Authentication
- Nook uses the authentication already configured in the Claude CLI, such as an OAuth session or `ANTHROPIC_API_KEY`.checked 4 Oct 2026
- Code tools
- Nook includes gopls diagnostics, inlay hints, reference search, and workspace symbol search.checked 4 Oct 2026
- Contact
- The maker’s about page invites product inquiries by email at [email protected].checked 9 Oct 2026
- Editor features
- It includes a file picker, project search, a git pane, an embedded terminal, and language-server diagnostics.checked 9 Oct 2026
- Git and editor
- It includes inline Git blame, a file picker, project search, a Git pane, and an embedded terminal.checked 4 Oct 2026
- Language support
- The default language server is gopls, and the page says the LSP wrapper is server-agnostic.checked 9 Oct 2026
- License
- The project is open source under the MIT license.checked 9 Oct 2026
- Offline AI availability
- The picker, project search, git pane, embedded terminal, and LSP diagnostics work without Claude on PATH; only the AI wedges require it.checked 9 Oct 2026
- Product
- nook is a terminal-native AI IDE distributed as a single Go binary.checked 9 Oct 2026
- Project instructions
- nook reads .nookrules at the workspace root and falls back to .cursorrules when .nookrules is absent.checked 9 Oct 2026
- Rules compatibility
- Nook reads `.nookrules` at the workspace root and falls back to `.cursorrules`.checked 4 Oct 2026
- Runtime
- The page says nook runs anywhere a shell runs, including over SSH, in tmux, and inside containers.checked 9 Oct 2026
The company
- Maker
- Truffle describes itself as an agent that ships in public and says it is made in Phantom.checked 9 Oct 2026
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