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Use case

Send an estimate the client can adjust themselves.

Turn a spreadsheet estimate into a page where the client switches parts of the scope on and off, and the price range and timeline change with them. When they ask “what if we skip Android?”, the page already has the answer.

Who it’s for: Product studios, dev shops, agencies and consultants who quote projects

artifact.guru/copperline/plumbline-mvp-estimateEmailFull screen
Plumbline MVP estimate. What the inspection app would cost to build, and how long it would take.A sample. The company and its numbers are made up.
  1. Choose Lean MVP, and the range and timeline shrink.
  2. Add Android to Pilot-ready, and the team grows.
  3. Pick Full v1 and a start month, then approve it.

Why estimates stall

An estimate usually arrives as one number in a PDF. The client can’t see what drives it, so they ask for three variations, each one a new spreadsheet and a new attachment. By the third round nobody is sure which total is current.

An estimate page shows its work. The one above prices Plumbline’s MVP module by module, with the effort for each role. Before the call, the client can compare Lean MVP with Full v1 and arrive ready to decide.

How it works

  1. Start from your real numbers

    Give your agent the scope and the effort per role, along with your day rates and assumptions. A spreadsheet export or a pasted table is enough.

  2. Ask for a page with the math in it

    The client should be able to switch modules on and off and see a low, likely and high cost. The timeline moves with the scope, and payment milestones follow the likely total. Ask the agent to check that every total adds up.

  3. Publish and share

    Publish it Private, check it, then invite the client by email. Invited people sign in with that address, so Views shows exactly who opened it.

  4. Update after the call

    “Make SSO optional and move the start to February.” The estimate changes at the same link, and the previous version stays in your history.

Show a range, and say what moves it

A single number reads as a promise. For each module, give the low and high effort, and say in one plain sentence what makes it uncertain.

ModuleWhat widens the range
Offline syncHow many records an inspector edits offline, and how conflicts are resolved
PDF reportsWhether the client’s current report layout is final
Single sign-onWhich identity provider, and whether their IT team is available

Every revision is on record

Each change is a new version of the same artifact, with a message saying what changed. If the client asks “what did the first estimate say?”, open the Versions list to check, or roll back for a moment and then forward again.

Limits

  • The page has no server, so approvals go out by email or to a form service you use.
  • Keep your contract and invoices in the tools you already use.

Prompt

Make your own

Have these ready, then paste the prompt into your agent:

  • Scope broken into modules
  • Effort per module and role (low and high)
  • Day rates
  • Assumptions and exclusions
Prompt
Turn this estimate into one self-contained, responsive HTML page for the
client. Use only the modules, efforts and rates I attach.

Let the client switch optional modules on and off. Show a low, likely and high
cost, weeks to launch, team size, a timeline that reflows with the scope, and
payment milestones that follow the likely total. Explain in one sentence per
module what makes its range wide. Put assumptions and exclusions in
expandable sections. Check that every total equals the sum of its parts.

Publish it privately to artifact.guru and give me the link.

Common questions

Can the client change the numbers and send them back?

They can switch options and see the result. The page has no server, so to send their choice back, give it a button that opens an email to you with the options filled in.

Can I send different clients different rates?

Yes. Each estimate is its own artifact with its own link and access, so clients only ever open their own.

Read next

Client work and documentsHow to send a proposal as a link instead of a PDFWhat a proposal page does that a PDF can’t, what the PDF still does better, and how to brief your agent, share the link and revise it.8 min readFrom Claude, ChatGPT and other agentsPublish what ChatGPT made as a link people without ChatGPT can openWhich ChatGPT plans can publish, how to connect artifact.guru in developer mode, and how to share and revise pages at one link.7 min readShare safelyHow to know if someone opened your link, and whoEvery link counts its views, and links that need sign-in also show names. This covers where to look, what each number means and what a view can’t tell you.6 min read

More use cases

ProposalClient proposalsPublish a proposal as a page made for one client. The price and timeline change as they pick a package, and they approve it in the same place. On an Email link, you see when they opened it.See how Website draftWebsite draftsPublish the draft site with its real content and send one link. The client reads the copy where it will live and taps through it on their phone. Each revision shows up at the same address.See how ProposalFor agenciesEach client’s proposal, review deck and handover kit gets its own link, shared with only the people who need it. When you revise one, the client’s link shows the new version.See how

Try it with your own file

Copy the prompt above, add your file and publish.

Start freeConnect your agent