Contractor Bid Kit: Build a 90‑Minute Repo That Gets You Three Accurate Quotes

The kit is intentionally small and precise. Every file has one job: remove guesswork for the contractor so their price equals the scope you expect. The core deliverables are a one‑page PRD with clear acceptance criteria, a short clickable demo spec (Figma/HTML prototype), exported mockups (PNG/SVG + assets list), a JSON‑LD SoftwareApplication snippet describing the app, and a cost‑estimation rubric that forces line‑item responses.

Why these pieces? The one‑page PRD sets the functional boundaries and acceptance criteria so contractors can price to a known outcome. The clickable demo prevents differing UX assumptions. Mockups and an assets list eliminate back‑and‑forth about deliverables. JSON‑LD helps index and clarify the product type when you publish the brief, and the rubric standardizes the units of work so you can directly compare proposals.

Minute 0–10: Draft the one‑page PRD. Use a template focused on outcome and acceptance criteria — one sentence problem, one‑sentence solution, target users, three core flows, and explicit acceptance criteria (what 'done' looks like). Use a tool template (Notion/Confluence/Smartsheet) to avoid formatting overhead.

Minute 10–45: Build the clickable demo spec. Export or create 3–6 screens: onboarding, core flow, and one edge case. If you know Figma, duplicate an existing kit and wire 3 screens into a prototype. If not, create a simple HTML prototype with placeholder assets. The prototype’s job is to show exactly how the app behaves for the flows you asked about.

A good rubric turns ambiguous scope into line items with units. Break the scope into: UI screens (count), integrations (OAuth, payment gateway), backend endpoints (CRUD actions), hosting and maintenance assumptions, and QA/timeboxed tasks. For each line item require: unit count, unit definition, hours per unit (contractor’s estimate), rate or fixed price, and explicit exclusions.

Require contractors to return: a cost table, a timeline with milestones, a list of assumptions, and a change‑order rate. The rubric should also include a short sample calculation so bidders format answers consistently. This lets you compare cost per unit (e.g., $/screen, $/endpoint) rather than opaque lump sums.

Embedding a minimal JSON‑LD SoftwareApplication snippet in your public brief clarifies what you’re building in machine‑readable form and helps contractors (or platforms that index projects) quickly understand app type, OS, and categories. Use schema.org/SoftwareApplication fields: name, description, applicationCategory, operatingSystem, url, and offers if you expect pricing tiers.

Keep the snippet tiny and editable in the repo so contractors can validate it locally. The example below is intentionally minimal — it signals software intent without forcing marketing copy or full product pages. You can attach this snippet as app-metadata.json in the repo.

When proposals arrive, normalize each bid to your rubric. Convert lump sums to $/unit where possible, align timelines to your milestone structure, and score each proposal on cost, clarity of assumptions, responsiveness, and demonstrated past work for similar tasks. If a contractor left fields blank or provided vague exclusions, mark that as increased risk.

Favor proposals that show the most overlap with your acceptance criteria, provide a named point of contact, and include a realistic change‑order policy. Run a short follow‑up call only to clarify assumptions — avoid open scope conversations that invite ad‑hoc price changes. With a reproducible kit, you should be able to decide between comparable proposals in one meeting.