See the connected scope
Requirements, features, screens, and user flows stay in one SOT, so you know which context belongs in the next AI request.
AI PRODUCT PLANNING
A product context your
AI can build from.
VibeSpec is a free, open-source AI product-planning plugin for Claude and Codex.
Describe the workflow you want to build. Review the PRD, feature specs, and screen structure, then give AI the agreed planning file with your implementation or change request.
FROM REQUEST TO REVIEW
Building a CRM? Start with the rules.
Go beyond a feature list: decide who does what, and under which conditions.
- Your request“Plan a CRM for a five-person sales team.” Describe the workflow and the rules you have not decided yet.
- The planning outputReview lead requirements, acceptance criteria, screens, and flows in one source of truth (SOT).
- Your next change“Require an owner to review duplicate leads before linking them.” Attach the file and ask for that focused update.
Open the CRM planning screen WHY VIBESPEC
A product plan is not a document.
It is context you can hand to AI.
A convincing screen can still leave ownership and exceptions undefined. Before requesting code, review the same plan with your team and identify the open decisions and scope of the change.
Change only what needs changing
Review what a change touches across features, screens, and flows, then ask AI for the scoped update you actually need.
Check whether a KPI can be measured
KPI Measurement Check shows missing evidence and decisions, then provides a handoff request for resolving them with AI.
HOW IT WORKS
Create one standard.
Review it. Hand it to AI again.
- 01
Start with an idea or template
Describe the product you want to build or begin with a real-world template.
- 02
Connect the plan
Create one SOT with a PRD, feature specs, information architecture, and user flows.
- 03
Review the working source
Use the HTML viewer to inspect the screens and connections, then make the needed edits.
- 04
Hand it to AI again
Attach the updated SOT to Claude or Codex for the next scoped request.
LIVE PRODUCT DEMOS
See VibeSpec now,
without downloading anything.
Explore work under review versus release scope, an unresolved KPI decision, and a measurement-ready example in the latest public demos.
01 · CHANGE REVIEW
Compare work under review with release scope
In Neighborly, the review workspace includes proposed work while the integrated release view keeps only the approved scope.
Open change-review demo02 · OPEN KPI DECISION
Turn an open KPI into the next AI request
See the CRM measurement gap, the decision it needs, and the handoff request that applies it through Claude or Codex.
Open KPI decision demo03 · MEASUREMENT READY
Inspect a plan ready for measurement
See how the WeekChef demo connects KPI evidence with its events, features, and screens.
Open ready-plan demoSTART WITH A FREE TEMPLATE
Start your own product
context with a free template.
Explore the three latest system planning templates. Each includes a free PRD, editable SOT, and HTML planning viewer—not a ready-to-run application.
FREE SOT TEMPLATE
Technical Debt Management System PRD Template
Define technical-debt evidence, priority, ownership, remediation scope, and the criteria for validating or reopening work.
View templateFREE SOT TEMPLATE
Experimentation and A/B Testing Operations System PRD Template
Connect hypotheses, audience assignment, exposure tracking, metrics, and guardrails to clear launch-or-stop decisions.
View templateFREE SOT TEMPLATE
Data Contract Management System PRD Template
Define producer and consumer responsibilities, schema compatibility, quality breaches, and approval or rollback decisions.
View templateOPEN SOURCE · FREE TO USE
Hand your product context
to AI with your next request.
VibeSpec is free and open source. Start with a template or install the plugin to create the SOT for your own product.