Developer mukundzha has launched Hazzel, a new terminal-based coding agent that prioritizes user control and safety. The tool, which appeared on Hacker News on September 7, 2026, distinguishes itself with a bring-your-own-key (BYOK) architecture and a robust 'undo-everything' capability. This approach allows developers to leverage their own LLM credentials while maintaining a safety net for AI-generated code changes.

BYOK and Local Control

Hazzel’s BYOK design means users connect their own API keys, avoiding vendor lock-in and allowing for flexible model selection. This is a significant shift from proprietary agents that bundle specific models, giving power users the ability to swap between different LLMs depending on the task at hand. The terminal interface ensures that the agent remains lightweight and integrates seamlessly into existing developer workflows without requiring heavy IDE plugins.

The 'Undo-Everything' Safety Net

The most notable feature is Hazzel’s 'undo-everything' functionality, which addresses a common fear among developers using AI agents: irreversible changes. By allowing users to revert any action taken by the agent, Hazzel reduces the risk of AI hallucinations or incorrect code modifications causing long-term issues. This feature is particularly crucial for complex refactoring tasks where the agent might make sweeping changes that are difficult to track manually.

Early Adoption and Community Response

As of its initial Show HN post, Hazzel has received limited attention with a low score and no comments, indicating it is in the very early stages of community adoption. The project is hosted on GitHub under the repository mukundzha/hazzel, where developers can inspect the source code and contribute to its development. Despite the low visibility, the tool’s focus on practical developer pain points like control and safety suggests potential for growth among those skeptical of current AI coding assistants.

Key Takeaways

  • Hazzel is a new terminal coding agent launched on September 7, 2026.
  • The tool uses a bring-your-own-key (BYOK) model for LLM access.
  • A key feature is 'undo-everything,' allowing users to revert AI changes.
  • The project is currently in early stages with minimal community engagement on Hacker News.

The Bottom Line

Hazzel enters a crowded field by focusing on safety and user control, but it needs community validation to prove its utility against established players.