Harden

Harden is a security layer that checks coding-agent tool calls locally before they run.

Harden is a security layer designed to control coding-agent actions. It acts as an Agentic Integrity Foundation to monitor and verify what coding agents do. The tool checks supported coding-agent tool calls before they execute. It operates locally on your machine for enhanced control. This product is built for developers and teams who use AI coding agents.

Harden at a glance

Best for: Software engineer
Pricing: Free
Released: September 2026
Category: AI coding tool
Website: harden.run

Key features

Controls coding-agent actions
Checks tool calls before execution
Runs locally on your machine
Provides agentic integrity

Use it for

Controlling coding-agent tool calls before they run
Securing local AI coding workflows

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