How to set up your Brain in Thinkr

Your Brain is the context every other feature draws from. Fill it in once and the Coach stops asking basic questions, generated PRDs match your house structure, critiques judge against your standards, and prototypes use your design system. Takes 5 minutes. Saves hours later. This guide walks the three tabs, Organisation, Standards, and Knowledge.

Before you start

Open Brain from the sidebar. To make changes click Edit Brain (top-right), editing is admin-only. When you're done you'll click Save Brain; Cancel discards unsaved changes. The fastest high-leverage setup is products first, then standards, then knowledge.

Step 1, Add your products (Organisation)

On the Organisation tab, under Products, click Add product or domain and fill in Name, a one-line Description, and Product type (e.g. B2C SaaS). At least one product is required, the Coach uses these to skip basic discovery questions, so a PRD starts from what your team already is rather than from zero. Add one row per product or domain area you write specs for.

Step 2, Set your standards

The Standards tab is where you encode how your team writes:

• PM Standards → PRD template style, pick Standard (full), Lean (trimmed), or Custom. This shapes the structure of every generated PRD.
• Custom templates library, click New custom template to save reusable PRD structures (e.g. Fintech Launch PRD). Set one as the Brain default; PMs can still switch per-PRD on the Context step.
• Glossary, define your terms and acronyms (ARR = Annual Recurring Revenue) so Thinkr uses them consistently.
• Custom Instructions, standing rules applied to every interaction, coaching, generation, and critique, e.g. "Always include a 'What if we skip this?' section" or "Use UK English spelling."
• Default Design System, upload a .md file describing your tokens, components, and voice; it becomes the default style for generated prototypes.

Custom Instructions and PM Standards do different jobs. Standards control the PRD template structure; Custom Instructions are behavioral rules that apply everywhere. Use both.

Step 3, Add knowledge and tune memory

The Knowledge tab gives Thinkr reference material:

• Knowledge Base, upload reference docs (PDF, TXT, Markdown, CSV). Thinkr uses these as context during coaching and generation, and you can pick a subset per-PRD on the Context step. If you've uploaded a lot of large files, generation keeps the injected context to a budget, most recent documents first, so a draft stays fast and focused rather than carrying your whole library, and you'll see a short "knowledge base trimmed" note in the output when that happens. To guarantee a specific document is used, select it per-PRD on the Context step, a hand-picked selection always takes priority over the automatic budget.
• Memory, patterns and preferences Thinkr learned from past sessions (Preference, Pattern, Domain Fact, Rejection). It fills in over time, but you can Add memory manually, e.g. "Team uses RICE for prioritization." Toggle any memory off without deleting it.

Step 4, Save

Click Save Brain. From now on, everything you do inherits this context automatically.

How the Brain shows up everywhere else

• In the Coach, your products mean it skips questions it can already answer.
• In the Context step, your Knowledge Base documents are selectable per-PRD.
• In Critique, your standards and custom instructions are part of what the review judges against.
• In Prototype, your default design system styles the mockup.

A Notebook can also push its research into your Brain with Send to Brain, so discovery work becomes reusable context for future specs.

That's the loop

Add your products, set your standards, upload your knowledge, and let memory accumulate. The Brain is the one place where five minutes of setup makes every PRD after it sharper.

Ready to try it? Open Thinkr and click Brain.