PRD Studio.
Tools
A PRD co-author and sparring partner for Claude: it drafts a working document from what you already have, then will not let the document go until it has survived a proper interrogation.
PRD Studio is a product requirements document co-author and sparring partner, built to run inside Claude. It takes whatever concept material already exists, notes, a brief, a half-formed idea, and turns it into a working first draft.
The draft is then handed to a panel of adversarial personas, each reading it through a different lens: engineering, QA, the end user, security, compliance, and more. The panel grills the document, persona by persona, section by section, until it is stable under interrogation rather than merely plausible on first read.
It is plain markdown, run in your own Claude, either a claude.ai project or a Claude Code plugin. Your product thinking never touches our servers: PRD Studio is the prompt and the persona library, not a hosted service.
DRAFT
Writes the first version of the PRD from whatever concept material you already have.
GRILL ME
The panel questions you before a word of the document is drafted, to surface gaps early.
GRILL THE PRD
The panel interrogates the finished document, persona by persona, section by section.
STATUS
Reports where the document stands: which personas are satisfied, and what is still open.
EXPORT
Produces the final PRD as plain markdown, ready to hand off.
The current release grows the command set from five to twelve: persona management, decomposition of a converged PRD into a behaviour ledger with acceptance checks, handoff to a build plan, validation of the plan and of the finished build against the PRD, and a grill audit a human expert can mark.
Ten personas, each reading the document through a single lens. A plain grill runs all ten; name personas to run a subset. Every persona is a file, so the library grows without touching code.
Engineer
Could I build this without guessing?
QA
Can every behaviour be verified?
End User
Does this match how the real job works?
Security & Compliance
What is undefined about data sensitivity, audit and accountability?
Platform Architect
Is the capability-versus-configuration boundary drawn right?
Data Protection
Lawful basis, retention, subject rights.
Accessibility
Who is excluded, and what evidence exists?
Commercial Viability
Who pays, and what kills the case?
Operations & Support
Can it be run and supported on day two?
Regulator
Which regimes apply, and what would an inspector ask for?
PRD Studio is open source. View the repository on GitHub →
/plugin marketplace add digital-illumination/prd-studio /plugin install prd-studio@prd-studio
Create a project, paste project-instructions.md into
the project instructions, then upload the template and the
persona files.
Built by Digital Illumination and hardened on real engagements before release, with the client specifics removed.
Back to the practice →