Open questions
Nothing gets quietly assumed. Each gap has an owner, and hand-off waits until it is answered or accepted as an assumption.
Questions, a spec, an architecture and a build plan. Hand it to any builder.
Makers AlmanacPlanning tool of the year 2026Public plans from people who think before they build. Fork one and make it yours.
Browse all 1,284Residents join one list across 14 sites. Plots are offered in order, held for 10 days, then passed on.
An unanswered offer expires at 18:00 on day 10 and moves to the next resident.
31 tasks · 6 weeks · handed to a two-person agency
What happens to an item nobody could fix?
Volunteers see a queue per table: electrics, textiles, bikes. Last month: 38 tickets, 29 fixed.
Sections mark availability; the planner picks dates that keep every voice at quorum.

Tycho reads the idea and asks what a senior engineer would ask. Answer, skip, or mark it as an assumption.
Answers become a written spec: roles, flows, rules, data and what is out of scope. Gaps stay flagged.
Components, data and integrations, each choice linked to the line of the spec that needs it.
Milestones, tasks and estimates in build order, ready for a team, an agency or an agent.
Who books: the patient, the front desk, or both?
Both. The front desk books for walk-ins and phone calls.
Do therapists work across clinics?
Yes. Two of nine split their week between two clinics.
When can a patient cancel and still get the deposit back?
Decides the refund rules, the reminder timing and one Stripe webhook.
What happens to booked sessions when a therapist calls in sick?
Patients pay a 20% deposit when they book. Cancelling up to 24 hours before the session refunds it in full; later cancellations and no-shows keep it.
Do group classes follow the same deposit rule?
The parts of planning that usually live in one person's head get their own place, with an owner and a history.
Nothing gets quietly assumed. Each gap has an owner, and hand-off waits until it is answered or accepted as an assumption.
Every choice with the options considered, the reason, and who made the call. Six months later, you still know why.
Likelihood, impact and a mitigation for each risk, scored again whenever the plan changes.
Patients pay a full 20% deposit when they book.
Cancelling up to 48 24 hours before refunds it in full.
A sick therapist cancels with no charge.
Compare spec versions line by line, with the question that changed each line, before anyone builds the wrong one.
Your engineers, an agency, a freelancer or an AI coding agent. Everyone gets the same plan, in the format they already work in.
From 212 teams who handed off a Tycho plan between January and August 2026.
We used to start building on a Monday and find the real requirement on Thursday. Tycho asked about refunds before anyone opened an editor.
Ines MoreauFounder, Larkspur BookingsIt is the first spec our contractors have read to the end. The decisions log alone saved us two arguments a week.
Daniel OkaforCTO, Pennant HealthFourteen questions. Two of them killed features we would have spent a month on.
Abena OwusuProduct lead, QuarryStart free on two ideas. Viewers and commenters never count as seats.
For trying Tycho on a real idea.
$0forever
Start freeFor founders, freelancers and small studios.
$24per editor / month
Start a 14-day trialFor product teams and agencies.
$40per editor / month
Talk to usNo. Tycho stops where building starts. It produces the plan; your team, an agency or an agent builds from it.
Any. Exports are plain Markdown, a PDF brief, or tickets in Linear, Jira and GitHub. The agent pack is ordered for Claude Code, Cursor and Codex.
A first spec takes about 20 minutes of answering questions. Most teams reach hand-off in 2 to 4 days, with reviews in between.
Mark it as an assumption or assign it to someone. It stays in Open questions, and on the hand-off checklist, until it is resolved.
Yes. Turn on Import repo and connect GitHub. Tycho reads the code first, so its questions start from what already exists.
You do. Plans are private by default, exportable at any time, and never used to train models.
Free for your first two ideas. No card needed.