Tool One is a coding assistant that plugs into your editor and suggests, explains, and refactors code as you write.
What it does
It watches the file you're working on and offers inline completions and chat-based explanations, with the option to apply a suggested diff directly.
Using it day to day
Completions are fast and mostly on-target for common patterns. It struggles more on unusual codebases with heavy custom tooling, where suggestions sometimes ignore project conventions.
What's good
- Fast, low-latency completions
- Chat panel understands the open file's context well
- Free tier is genuinely usable, not just a trial
What's not
- Struggles with unconventional project structures
- No offline mode
Pricing
Free tier covers most day-to-day use; the paid tier mainly adds higher rate limits and a larger context window.
Verdict
Solid default pick if you want assistance without switching editors. Power users on unusual stacks may find themselves overriding it often enough that it's not a net time save.
The Rabbitory