Changelog

Flows Start Every Time

Running a design flow now starts reliably. Previously a flow could fail to begin and leave you watching a connection retry — that's resolved, so when you start a run it connects and streams its progress right away.

More Accurate Engineering Analysis

When your design includes thermal work — heat dissipation, material limits, enclosure cooling — the engineering agents now read those figures correctly. Before, a heat-related measurement could be misread as the device's power draw, which made the agents appear to disagree with each other and slowed a run down with unnecessary back-and-forth. Runs for small, low-power devices in particular now reach a clean, consistent result faster.

3D Model Generation Restored

Generating a 3D model on the Design page works reliably again. If you ran into a "Generation Failed" message recently, that's resolved — start a design and it will build and render the model as expected. Note that a fresh model can take several minutes to generate; a few minutes of "generating" is normal, not a failure.

Clearer Guidance on Design Prompts

The Design page turns your description into a real, manufacturable 3D object, so it needs a physical thing to model — a part, enclosure, bracket, or mechanism — rather than a scene or picture. If a prompt can't be turned into a model, you'll now see a clear explanation and an example of a good prompt, instead of a generic error.

Reliable 3D Model Generation

Generating a 3D model — both from the Design workspace and as part of a full design run — now works directly in the cloud with no local setup. Previously, 3D generation could fail to start; now you can describe an enclosure and get a real, downloadable 3D model (and an editable design you can refine with follow-up requests) every time.

Refine Your Design Conversationally

After generating a model you can keep iterating on it — ask for changes in plain language and the design updates in place, carrying your previous work forward, with the updated 3D model and STEP file ready to download.

One-Click Design Package Download

Finishing a design now reliably hands you the complete project bundle — blueprints, CAD files (STEP/GLB/STL), the engineering report, build guide, firmware, and bill of materials — in a single download. The download button works from every panel, and your package stays available when you come back to a finished project later, not just in the moment it completes.

Shop Your Bill of Materials Directly

The bill of materials now tells you exactly where to buy every part. Each line includes a direct purchase link, the supplier part code, the manufacturer part number, and a datasheet link — in both the on-screen list and the downloadable spreadsheet. No more hunting down components by hand: open the BOM, click through, and order.

Cleaner, Readable Engineering Results

Agent results now render with proper formatting — headings, lists, bold text, code, and tables all display the way they were written instead of showing raw symbols. Reading a specialist's output is far easier to scan.

Tap a Flagged Connection to See Why

When two steps in your design conflict, or a step raises a safety or feasibility concern, the connection between nodes lights up red or yellow. Clicking it now opens a clear breakdown of exactly what the issue is — the conflicting values, the feasibility scores, any warnings, and suggested fixes — so you know what to address.

Refine Your Idea Before You Build

The workspace start screen now has a quick link to the Idea Lab — "Want to improve your idea first?" — so you can sharpen your concept before kicking off a full design run.

A Clearer Path to Upgrade

Free accounts now have a one-tap "Upgrade now" button pinned to the top-right corner, so unlocking more — including 3D renderings of your designs — is always within reach. We also tidied the top navigation: it now shows "Dashboard" directly instead of your wallet address.

Production-Quality 3D Enclosures

The 3D viewer now generates manufacturing-ready enclosure designs instead of basic box geometry. When you submit a hardware design prompt, the system produces a detailed enclosure with proper rounded edges, ventilation, port cutouts, and mounting features — ready for injection molding or 3D printing.

Progressive Design Refinement

Your 3D model now improves automatically as your design progresses through three stages:

• Stage 1 — A recognizable product shape appears within the first minute based on your description
• Stage 2 — After specialist engineers analyze your components, the enclosure updates with precise cutouts for connectors, sensor openings, display windows, and ventilation slots
• Stage 3 — After manufacturing review, the final design includes draft angles, sealing features, and material-specific optimizations

Each stage replaces the previous model in the viewer — no page refresh needed.

STEP File Downloads

Every design now includes a downloadable STEP file compatible with professional CAD software (SolidWorks, Fusion 360, FreeCAD). Import your HIIE-generated enclosure directly into your existing design workflow.

Smarter Budget Management

A new budget system tracks design generation usage across your account. The system automatically adjusts refinement depth based on remaining budget, ensuring you always get at least a Stage 1 design for every project.

Upgrade Your Plan Directly from Pricing

The pricing page now shows your current plan and lets you upgrade with one click. Selecting a paid tier takes you straight to a secure checkout flow where you can enter your payment details. After completing payment, you're redirected to your dashboard with your new plan active immediately.

Plan Tiers Renamed for Clarity

Our plans are now named Free, Innovator ($29/mo), Experienced ($100/mo), and Senior ($250/mo). Each tier includes progressively more runs per month, higher-quality AI models, and better support. Custom enterprise plans are still available by contacting our team.

Manage Your Subscription

Existing subscribers can now manage their subscription directly from the pricing page or dashboard. Change your plan, update payment methods, or cancel anytime through a secure billing portal.

Dashboard Shows Your Active Plan

Your dashboard now displays your current plan tier, subscription status, and a success message when you've just upgraded. Plan details sync automatically so you always see your real usage limits.

Multi-Environment Support

HIIE now supports separate staging and production environments with full isolation. Staging environments allow testing new features with real authentication flows without requiring payment, giving teams confidence before deploying to production.

Public Creations Gallery

Share your completed hardware designs with the world. After finishing a flow, click "Go Public" in the bottom bar to publish your creation to the new public gallery at /creations.

What's included:

• Browse and discover — A public gallery of community-built hardware designs, sortable by newest or top voted
• 3D model viewer — View GLB and STL models directly in the browser on each creation's detail page
• Component breakdowns — See the full parts list, dimensions, and detected features for each design
• Download files — Grab GLB, STL, or STEP files directly from any published creation
• Upvoting — Vote for your favorite designs to help the best creations rise to the top
• One-click publish — Publish from the workspace with a single confirmation; unpublish anytime

Your raw agent outputs, flow logs, and chat history always stay private. Only the finished design, components, and description are shared.

Multiple Payment Methods

You can now choose how you pay for your HIIE subscription:

• Card — Pay with Visa, Mastercard, Apple Pay, or Google Pay via Stripe
• $HIIE Token — Pay directly with $HIIE tokens on Solana for up to 40% off paid plans
• Crypto — Pay with crypto for 15% off

Click "Upgrade" on any plan to see all payment options with live pricing that updates as you switch methods.

Annual Billing

Save 20% by choosing annual billing on any paid plan. Annual pricing is available across all payment methods — card, $HIIE, and crypto.

Subscription Renewal for Token Payments

If you subscribe using $HIIE tokens or crypto, your dashboard now shows your subscription expiry date. When your subscription is within 7 days of expiring, you'll see a prominent renewal button that takes you back to the pricing page to re-subscribe. Expired subscriptions show a clear indicator so you always know your status.

Expanded Pricing Page

The pricing page now includes much more detail to help you choose the right plan:

• Why Upgrade — A visual breakdown of what you get with paid plans: faster models, full deliverables, more runs, priority support, API access, and token discounts
• Feature Comparison Table — Side-by-side comparison of every plan across all features
• FAQ — Answers to the most common questions about billing, payment methods, cancellation, and more

Free Access for Nonprofits & Students

Environmentalist nonprofits and students working on sustainability, clean tech, or conservation projects can now apply for free Innovator-tier access directly from the pricing page. The application form collects your details and project description, and our team reviews applications within a few business days.

What's included for approved applicants:

• 30 runs per month
• V4 AI models
• Full deliverable exports
• Email support

Scroll to the bottom of the pricing page to apply.

Unified Navigation

The floating navigation bar from the home page is now consistent across every page — pricing, dashboard, docs, creations, account settings, and all policy pages. Active pages are highlighted, and the nav stays fixed at the top as you scroll. No more mismatched headers between sections of the site.

Privacy & Compliance Updates

We've significantly expanded our legal and compliance documentation:

• Updated Privacy Policy with detailed data retention schedules, GDPR legal bases and Standard Contractual Clauses references, CCPA/CPRA rights for California residents, sub-processor disclosures with data locations, and a new dedicated privacy contact
• New Security & Breach Notification page at /security with incident response procedures, breach notification timelines, and a responsible disclosure program
• New Accessibility Statement at /accessibility with WCAG 2.1 AA conformance goals and known limitations
• Updated Token Disclosure with full revenue distribution transparency and SEC non-registration disclaimer
• Expanded footer now links to all legal pages: Terms, Privacy, Cookies, Security, Accessibility, AI Transparency, and Token Disclosure

Arthur Labs Verify — Custom CAPTCHA System

HIIE now includes its own CAPTCHA system, Arthur Labs Verify. Instead of generic text puzzles, challenges are built from real CAD models — you might identify 3D objects, pick which way is up, count assembly parts, or drag a lid onto a box.

Six challenge types available:

• Object ID — Select all images showing a specific type of object from a 3x3 grid
• Camera Fit — Rotate and zoom a 3D model until it fills the frame
• Orientation — Identify which direction is "up" for a rotated object
• Real vs Generated — Pick which of two renders looks more realistic
• Part Count — Count how many separate parts an assembly has
• Drag to Assemble — Drag a part to its correct position on the base

Embeddable on any website: Arthur Labs Verify works as a drop-in widget, similar to reCAPTCHA. Add a single script tag and a container div to any site to get bot protection powered by CAD intelligence.

Every human interaction helps improve our models — responses are anonymized and used to train better 3D generation over time.

Improved Security

• Authentication is now enforced in all non-local environments
• Cross-origin request handling has been tightened to only allow known domains
• Database access controls have been strengthened across all tables

New Features

• 59 Paid API Endpoints — Expanded from 9 to 59 API endpoints covering PCB engineering, manufacturing analysis, materials science, 3D printing, theoretical math, feasibility scoring, ethics review, compliance, and facility planning
• MCP Server — Connect HIIE tools directly to Claude Desktop, Cursor, or any MCP-compatible AI assistant at /mcp
• OpenAPI 3.0 Spec — Machine-readable API specification at /api/openapi and /.well-known/openapi.json for automatic client generation
• Agent Discovery — AI plugin manifest at /.well-known/ai-plugin.json and MCP manifest at /.well-known/mcp.json for marketplace listings
• New Tool Categories — Manufacturing (process selection, tolerance analysis, SPC, DFM), Materials (search, compare, compatibility, lifecycle), 3D Printing (cost estimation, slicer profiles, strength analysis, mesh validation), Theoretical (symbolic math, equation solving, unit conversion, physical constants), Facility (process chains, equipment lookup, floor layout)
• Tiered Pricing — Six pricing tiers from $0.03 (unit conversion) to $1.50 (full prototype), all payable with $HIIE tokens
• API Documentation Overhaul — Full endpoint reference with input schemas, pricing tables, and integration guides for x402 payments and MCP setup

Previous Updates

• Tier Enforcement Hardening — The backend now receives the user's tier from the server (not the client), preventing tier spoofing via the API
• Shared Tier Config — Single source of truth for all tier constraints (runs, model, tokens, CAD quality, support level) across the frontend
• Documentation Site — Full docs at /docs with sidebar navigation, markdown rendering with table support, and full-text search
• Knowledge Base with AI Chat Agent — Conversational support agent at /kb that answers questions about HIIE in real time with source article links
• Public Roadmap from Linear — Live product roadmap at /roadmap showing shipped, in-progress, and planned features with milestones and progress bars
• Task Management — Auth-gated task list at /tasks with Linear integration for creating and tracking engineering issues
• HubSpot CRM Integration — Users auto-sync to HubSpot as contacts on signup, feedback submissions create support tickets
• Feedback Widget — Floating chat bubble on every page for bug reports, feature requests, and general feedback
• Service Status Dashboard — Real-time backend health monitoring at /status with 30-second auto-refresh
• Help & Support Hub — Contact form with category selection, FAQ section, resource links, and community links at /help
• Changelog Page — Release notes rendered from MDX files at /changelog

Bug Fixes

• TWA Redirect Loop — Fixed an infinite redirect between / and /connect that trapped Solana dApp Store (TWA) users after logout, which caused the store review rejection for "Login / Logout Flow Failure"
• Workspace 401 Errors — The workspace page now validates your session token on load instead of only checking for a wallet address
• Automatic Token Refresh — If your session expires while using the workspace, HIIE now silently refreshes it in the background instead of blocking you with an error
• Silent Re-Login After Logout — Fixed a race condition where the dashboard could accidentally log you back in immediately after you logged out
• Wallet Disconnect on Mobile — Logout now retries the wallet disconnect if the first attempt fails (common when the wallet app is in the background on mobile)
• Chat History Not Loading — Fixed workspace message history never loading from the database due to reading from the wrong browser storage

Improvements

• Mobile UX Overhaul — Redesigned the Token Rewards page for mobile. The wallet connect flow now uses a smooth bottom sheet instead of a full-screen popup that blocked the view
• Auto-Connect in Wallet Browsers — Opening HIIE inside Phantom or Solflare's built-in browser now automatically connects your wallet — no extra taps needed
• Mobile-Responsive Across All Pages — Improved touch targets, text sizing, and spacing on the landing page, pricing, help, status, and token rewards pages for phones and tablets
• Wallet Connect on Token Rewards — Added Email/Google/Apple login option directly on the rewards page, matching the main login flow
• Backend tier naming aligned — Tiers renamed to match the frontend pricing page and database schema
• CAD quality tiers wired to subscription — Free users get basic CAD output; paid users get premium with fillets, ribs, and surface detail
• Landing page navigation — Added Docs, Help, and Roadmap links to the top nav bar
• Footer redesign — Three-column layout (Product, Resources, Company) with organized links
• Markdown tables now render correctly — Added remark-gfm for tables, strikethrough, and task lists across all docs and KB articles

New Features

• Documentation Site — Full Fumadocs-powered docs at /docs with MDX content, sidebar navigation, and full-text search
• Knowledge Base — 1,500-article searchable KB at /kb with categories, voting, and Supabase-backed full-text search
• Public Roadmap — Live roadmap at /roadmap sourced from Linear project tracker
• Task Management — Auth-gated task list at /tasks with Linear integration for issue creation and tracking
• HubSpot CRM Integration — Auto-sync users to HubSpot contacts on signup, feedback widget creates support tickets
• Feedback Widget — Floating feedback button on all pages for bug reports and feature requests
• Service Status Page — Real-time health dashboard at /status for all backend services
• Help Hub — Central support page at /help linking to docs, KB, roadmap, and status

Bug Fixes

• Login/Logout Flow — Fixed redirect loop that trapped TWA (Trusted Web Activity) users on /connect after logout. Solana dApp Store flagged this as "Login / Logout Flow Failure"
• Session Validation — Workspace now validates the JWT session token on mount instead of only checking for a wallet address. Users with expired tokens are redirected to login instead of seeing "Authentication required" errors
• Token Auto-Refresh — Workspace and flow prompt overlay now attempt to refresh an expired JWT before failing. If the token can be renewed, the user stays logged in seamlessly
• Silent Re-Auth Race — Fixed a race condition where the dashboard could silently re-authenticate a user immediately after they logged out by refreshing the JWT with a stale wallet address
• Wallet Disconnect — Logout now retries the wallet adapter disconnect on failure (common on mobile when the wallet app is unresponsive) before clearing auth state
• Message History — Fixed workspace message loading reading from sessionStorage instead of localStorage, which meant chat history was never restored from the database

Improvements

• Updated landing page navigation with Docs, Help, and Roadmap links
• Added footer with organized link columns (Product, Resources, Company)
• Middleware updated with proper public/auth route gating for new endpoints
• Auth checks across all pages (landing, connect, workspace, dashboard) now require wallet + provider + session token — preventing stale-session redirects to protected pages