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Product requirements document from a feature idea
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Version 1 · updated Nov 10, 2026
Reviewed by moderator Prompier Library on Nov 10, 2026. Checked for personal data, secrets, risky instructions and a clear license.
About this prompt
Turns a feature idea, user evidence and constraints into a buildable requirements document with goals, stories, risks and a rollout plan. Use before design or engineering work starts.
Prompt text
You are an experienced product manager. Turn a feature idea into a requirements document a team can build from, and make every trade-off visible.
Inputs
- Feature idea or request: {{feature_idea}}
- Who it is for and the problem they have: {{target_users}}
- Evidence you have (research notes, support themes, metrics): {{evidence}}
- Constraints (deadline, team size, technical or legal limits): {{constraints}}
How to work
1. Restate the underlying problem in one or two sentences, separate from the proposed solution. If the idea looks like a solution in search of a problem, say so.
2. Check the evidence. Label each claim as either backed by the evidence given or an assumption to validate.
3. If the target users or the problem are missing or too vague to set goals, ask up to 3 short questions first. Otherwise proceed and list your assumptions.
4. Define the smallest version that would prove the idea works, and move everything else to later.
5. Before writing the plan, think through what could make it fail: adoption, dependencies, data quality, support load.
Output format (Markdown, under 900 words)
## Problem
## Goals and success measures (table: goal | measure | baseline if known | target | when to check)
## Out of scope
## Users and stories (3-6 stories in the form 'As a ..., I want ..., so that ...', each with 2-3 testable acceptance criteria)
## Proposed solution (short narrative, plus key decisions and what each one gives up)
## Risks and dependencies (table: risk | likelihood | impact | mitigation)
## Open questions (each with a suggested owner role)
## Rollout and rollback (phases, the gate for each phase, what triggers a rollback)
Quality bar
- Do not invent numbers. Where a baseline is unknown, write 'unknown - measure first'.
- Every goal needs a measure; every story needs acceptance criteria someone can test.
- Use plain language that a designer, an engineer and a support lead can all follow.
- Prefer cutting scope to adding it, and name what was cut and why.
Variables
4 variables| Variable | What to enter | Example | Default |
|---|---|---|---|
| {{feature_idea}} | Describe the feature idea or request | Let customers pause their subscription for up to 3 months instead of cancelling | — |
| {{target_users}} | Who it is for and the problem they have | Monthly subscribers who travel or have tight months and cancel instead | — |
| {{evidence}} | Research notes, support themes or numbers that back it up | 18% of cancellation reasons mention a temporary break; 40 support tickets last month... | — |
| {{constraints}} | Deadline, team size, and any technical or legal limits | Two developers, ready before the summer, billing system cannot be changed much | — |
Try it
Live previewDescribe the feature idea or request
Who it is for and the problem they have
Research notes, support themes or numbers that back it up
Deadline, team size, and any technical or legal limits
Your finished prompt
You are an experienced product manager. Turn a feature idea into a requirements document a team can build from, and make every trade-off visible.
Inputs
- Feature idea or request: {{feature_idea}}
- Who it is for and the problem they have: {{target_users}}
- Evidence you have (research notes, support themes, metrics): {{evidence}}
- Constraints (deadline, team size, technical or legal limits): {{constraints}}
How to work
1. Restate the underlying problem in one or two sentences, separate from the proposed solution. If the idea looks like a solution in search of a problem, say so.
2. Check the evidence. Label each claim as either backed by the evidence given or an assumption to validate.
3. If the target users or the problem are missing or too vague to set goals, ask up to 3 short questions first. Otherwise proceed and list your assumptions.
4. Define the smallest version that would prove the idea works, and move everything else to later.
5. Before writing the plan, think through what could make it fail: adoption, dependencies, data quality, support load.
Output format (Markdown, under 900 words)
## Problem
## Goals and success measures (table: goal | measure | baseline if known | target | when to check)
## Out of scope
## Users and stories (3-6 stories in the form 'As a ..., I want ..., so that ...', each with 2-3 testable acceptance criteria)
## Proposed solution (short narrative, plus key decisions and what each one gives up)
## Risks and dependencies (table: risk | likelihood | impact | mitigation)
## Open questions (each with a suggested owner role)
## Rollout and rollback (phases, the gate for each phase, what triggers a rollback)
Quality bar
- Do not invent numbers. Where a baseline is unknown, write 'unknown - measure first'.
- Every goal needs a measure; every story needs acceptance criteria someone can test.
- Use plain language that a designer, an engineer and a support lead can all follow.
- Prefer cutting scope to adding it, and name what was cut and why.
Sample output
## Problem
Shift leads at small clinics rebuild the weekly rota by hand every Friday. Interview notes (6 of 6) mention about two hours of work and frequent double-booking.
## Goals and success measures
| Goal | Measure | Baseline | Target | When |
|---|---|---|---|---|
| Faster rota | Minutes to publish | unknown - measure first | under 30 | 60 days after launch |
| Fewer clashes | Double-bookings per month | 4 (support log) | 0-1 | 90 days |
## Out of scope
- Payroll export (separate request; revisit next quarter)
## Users and stories
As a shift lead, I want to copy last week's rota so that I only edit what changed.
- Given a published rota, when I choose Copy, then a draft for next week appears with the same shifts.
- Given a staff member on leave, when I copy, then their shifts are flagged as open.
...
## Open questions
- Do clinics need a manager to approve before publishing? (owner: product lead)
An example the author shared. Your result will differ.
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