Free during beta · access by approval
Design before you implement
Requirements, capacity math, diagrams, trade-offs and failure modes — grounded in your own internal docs and references.
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Live streaming
Watch the specification materialise section by section as you talk.
Your own references
Upload internal docs and references you have rights to. Passages are cited inline.
IDE & CI ready
Per-user API keys run the same agent from scripts and pipelines.
Who it is for
Senior engineers & developers
Write the design doc before the first line of code.
Architecture review teams
Score existing designs against a rigorous checklist.
Solo founders
Get a second opinion on your stack and scaling path.
Interview prep
Practise with scoped questions and full worked answers.
How it works · 92 seconds each
See the tool in action
Filmed walkthrough of the design workflow, scene by scene.
Free during beta. New accounts are approved from a waitlist.
Interview
Agent asks only the architecture-changing questions, then converges on a design.
Design doc
Full decision package from a problem statement, critiqued and validated before you see it.
Design review
Paste an existing design and get a scored, checklist-driven critique.
Stack & infra
Concrete language, framework, datastore, and cloud topology recommendations.
Documents, not chat transcripts
Requirements, back-of-envelope capacity math, a Mermaid architecture diagram, API and data model, deep dives, failure modes and a scaling path.
Opinionated, with receipts
Every major decision names the rejected alternative and the trade-off that decided it. Assumptions are stated, never hidden.
Where it is strong, and where it is not
Reliable
- Structuring a vague idea into a reviewable design document.
- Surfacing the failure modes and edge cases you forgot.
- Naming trade-offs and defending a specific choice.
- Critiquing an existing architecture against a rigorous checklist.
Treat with care
- Capacity numbers are order-of-magnitude sanity checks, not benchmarks.
- Cost estimates need your real pricing and usage data.
- It cannot know your org, legacy systems, or team skills unless you say.
- Final architectural accountability stays with you.