BUILDROOM
FREE EDITION
$0
A real starting point. Not a paid subscription.
- Private, local AI coding help on Windows
- Understand code, draft scripts, explore ideas
- 4B available in the current Store release
- 3B · 4B · 7B · 8B expansion coming
Pricing & availabilityStart free.
Start free.
Grow on your terms.
Find a useful starting point today, and a clear path to more capable local engineering as the next editions arrive. FREE is available now. LITE and ADVANCED are on the 2026 roadmap.
BUILDROOM
LITE EDITION
September 2026
Planned before the end of the month.
- The next step in local AI engineering
- Further upgrades follow the FREE expansion
- Aimed at more capable PCs and larger work
- Final capabilities and pricing at launch
BUILDROOM
ADVANCED EDITION
Late fall / early winter
Planned before the end of 2026.
- For more demanding engineering work
- Built toward higher-capacity workflows
- High-end hardware direction
- Final requirements and pricing at launch
Release roadmap updated September 5, 2026. LITE and ADVANCED dates are planned release windows, not present availability. Model support, hardware requirements, and capabilities are release-specific. The 3B / 4B / 7B / 8B FREE expansion is announced; it is not represented as already included in today’s Store download.
The release path · Updated September 5, 2026NOW NEXT FREE UPDATE SEPTEMBER 2026 LATE FALL / EARLY WINTER
Here is what comes next.
Start with FREE EDITION.
The current Microsoft Store release provides local 4B AI coding help. You can download it today.
More choice. Still free.
FREE EDITION is expanding to 3B, 4B, 7B, and 8B model options. No exact release date has been announced for this update.
LITE gets its turn.
Further upgrades follow the FREE expansion. Microsoft Store release is planned before the end of September.
ADVANCED arrives next.
Planned before the end of 2026, for more demanding engineering work. Final requirements and pricing will come with its launch.
| What matters | FREE | LITE | ADVANCED |
|---|---|---|---|
| Availability | Microsoft Store now | Planned September 2026 | Planned before year-end 2026 |
| Price | $0 | To be announced | To be announced |
| Model information | 4B current; 3B / 4B / 7B / 8B expansion announced | Final catalog at launch | Final catalog at launch |
| Hardware | See current Store requirements; each model depends on your PC | More capable PC direction; final requirements at launch | High-end hardware direction; final requirements at launch |
A release window is a plan, not a guarantee. No additional Buildroom edition or other Mainely Code product is included by implication.
This is only the beginningOne mission.
One mission.
A much bigger world.
FREE EDITION opens the door. Mainely Code’s wider product family is built around distinct jobs—not one app pretending to do everything.
Flagship cognitive platform
Northstar
Coordinates specialized intelligence, arbitrates competing analyses, and preserves provenance across complex missions. The bigger cognitive ambition behind Mainely Code.
Active development
Explore Northstar 
Cloud-based broad-spectrum AI
Project Sasquatch
Planning, research, writing, analysis, creative work, and product-aware conversations in Mainely Code’s cloud command center.
Paid public beta
Meet Sasquatch 
Local-first UI/UX design loom
Orb-Weaver
Turn prompts, sketches, screenshots, and references into reviewable interface maps, design tokens, and editable front-end foundations.
Microsoft Store · See current release
Explore Orb-Weaver 
First-party inference direction
Great North Provider
The inference system being developed for governed model execution, runtime lifecycle, resource use, recovery, and evidence.
Active development
Explore Provider 
A new planned product · Model engineering & AI research
Explore FORGE Build the AI. Not just with it.
Mainely Code’s FORGE is a planned local-first workbench for developing, modifying, training, evaluating, and exporting specialist models—and exploring new AI technologies.
Standalone by design. Development starting soon.AI anywhere. Governed everywhere.
The Great North is our connected ecosystem. Providence is the architecture that keeps its responsibilities clear.
Is FREE EDITION actually free?
Yes. Mainely Code Buildroom—FREE EDITION is available for $0 on the Microsoft Store. You do not need a paid Buildroom edition to start using it. Your PC, storage, and electricity are still your own resources.
Are 3B, 4B, 7B, and 8B all available today?
Not yet. The current Store release describes a local 4B model. We have announced an expansion to 3B, 4B, 7B, and 8B for FREE EDITION. Read the announcement for what is changing; check the Store release details before downloading.
When are LITE and ADVANCED coming?
LITE EDITION is planned for the Microsoft Store before the end of September 2026, with further upgrades following the FREE expansion. ADVANCED EDITION is planned for late fall or early winter, before the end of 2026. These are release targets, not claims of current availability.
Can I buy LITE or ADVANCED here now?
No. We are not taking payment or advertising a finished paid edition on this website. Final prices, supported models, hardware requirements, and purchase details will accompany the respective launches.
Your next idea deserves a start.
Start with FREE EDITION. See what you can make with local AI at your side.