Software design agent
You talk through your task with rubberduck. Decision by decision, you build towards a PR you actually understand. You're not just reviewing — you're driving.
01 — mechanism
You build the design, one decision at a time.
rubberduck explores the solution space with you, surfacing the decisions you need to make — one at a time — until you have a design you own.
02 — design doc
Every decision is documented in a design document.
Every decision and the reasoning behind it, captured automatically as you go.
The context stays, even after the feature ships.
03 — plan
The design is compiled into an implementation plan.
A blueprint for translating the design into code, broken into small reviewable commits — like a stack of PRs telling the story of the change one commit at a time.
Grounded in a deep analysis of your codebase, with every dependency mapped and every edge case surfaced.
04 — execution
Your plan runs against your quality gates.
rubberduck runs the plan inside a dev environment image you provide — in an isolated container, with only the access you give it.
Your tests, your linters, your formatters all run before the PR is opened.
See how a session works from problem to PR.
02:24 · full demo
05 — pricing
One price. No token markup.
$ 20 / month billed annually
Unlimited sessions, plus $5 of credit for tokens and execution compute every month. No markup on tokens — pay only for what you run.
→ Tokens billed at provider rates. Execution compute billed by vcpu's and memory requested.