# MassGen v0.1.67 Release Announcement

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This is the current release announcement. Copy this + feature-highlights.md to LinkedIn/X.
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## Release Summary

We're excited to release MassGen v0.1.67 — Modernized WebUI! 🚀 Complete WebUI redesign with inline final answers, keyboard shortcuts, and modernized component architecture. Plus: RoundBudgetGuardHook for per-round cost control, unified parallel pre-collab phases, and regression guard for safe iterations.

## Install

```bash
pip install massgen==0.1.67
```

## Links

- **Release notes:** https://github.com/massgen/MassGen/releases/tag/v0.1.67
- **X post:** [TO BE ADDED AFTER POSTING]
- **LinkedIn post:** [TO BE ADDED AFTER POSTING]

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## Full Announcement (for LinkedIn)

Copy everything below this line, then append content from `feature-highlights.md`:

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We're excited to release MassGen v0.1.67 — Modernized WebUI! 🚀 Complete WebUI redesign with inline final answers, keyboard shortcuts, and modernized component architecture. Plus: RoundBudgetGuardHook for per-round cost control, unified parallel pre-collab phases, and regression guard for safe iterations.

**Key Improvement:**

🖥️ **Modernized WebUI** - Complete UI redesign:
- Inline final answers replace modal overlays for smoother workflow
- Responsive keyboard shortcuts for efficient navigation
- Modernized React component architecture with Zustand state management

**Plus:**
- 💰 **RoundBudgetGuardHook** — per-round cost enforcement prevents unexpected API bill overruns with configurable warning thresholds
- 🎭 **Unified pre-collab phases** — personas, evaluation criteria, and prompt improvement now run in parallel for faster task setup
- 🛡️ **Regression guard** — blind A/B verification subagent before submitting revisions ensures improvements are real

**Getting Started:**

```bash
pip install massgen==0.1.67
# Try the modernized WebUI
uv run massgen --web
```

Release notes: https://github.com/massgen/MassGen/releases/tag/v0.1.67

Feature highlights:

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