A coding agent that lives in your terminal.
Arctic reads your codebase, fetches live docs, writes files, and runs tests — all from a single terminal session. Plan before you build. Ship faster.
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Built by
✳themillenniumfalconPlan before you build
Switch into PLAN mode to explore the codebase, read docs, and map out a strategy — without touching a single file. Commit to BUILD when you're ready.
Live documentation fetching
fetchUrl pulls current docs at call time and distills them through a focused Haiku pass. The agent never codes against stale training data.
Full tool suite
Read, write, edit, move, glob, grep, bash, file-tree, and a persistent todo list — everything a senior engineer reaches for in a terminal, orchestrated automatically.
Your code stays local
Tool execution happens on your machine, scoped to your working directory. Only the conversation is exchanged with the backend — your source never leaves your computer.
Multi-provider model choice
Pick from Anthropic, OpenAI, and Google models on the fly with /models. Per-model reasoning and thinking options are applied automatically.
Persistent sessions
Conversations are stored server-side and can be reopened and continued at any time via the /sessions browser.
How it works
Three steps.
No surprises.
Tool inventory
Everything the
agent can reach.
Read a file from the project directory into context.
List the entries in a directory under the project.
Build a recursive tree of the project to orient before reading files.
Find files matching a glob pattern, e.g. **/*.ts.
Search file contents across the project with a regular expression.
Create or overwrite a file at a given path.
Replace an exact, unique string in a file — no full rewrite.
Move or rename a file or directory, staying inside the project boundary.
Run a shell command — tests, builds, installs, git, scripts.
Fetch a URL, convert it to Markdown, and answer a focused question about it.
Track multi-step tasks across the session — add, complete, and review steps.
PLANIn PLAN mode, the write tools — writeFile, editFile, moveFile, and bash — are disabled. Everything else stays available.
FAQs