act101 is a tool that helps close the loop on code quality by providing a procedural verification layer for coding agents.

Overview

act101 was born out of decades of production experience across various industries, with the goal of making coding agents trustworthy. It provides a closed loop of analyze, act, and attest, ensuring that every edit made by an agent is classified, tested, and gated before it can merge.

Key Features

• 163 grammars supported
• 183 refactoring operations
• 41 analyzers
• Instant undo feature
• Zero dependencies and supply chain risk

How It Works

act101 works by analyzing the codebase, applying refactoring operations, and then attesting the changes to ensure they preserve behavior.

Benefits

• Ensures code quality and prevents architectural drift
• Provides a deterministic verdict and receipt for every merge
• Allows for instant undo of agent changes

Use Cases

• Individual engineers can use act101 to verify every refactor made by their agent
• Codebase owners and architects can use act101 to see structural drift and prove refactors
• Teams can use act101 to gate every change and ensure code quality

Integrations

act101 integrates with various coding platforms, including Claude Code, Cursor, Codex, Windsurf, Zed, and opencode.

Pricing Overview

act101 offers a free Builder Edition, as well as paid Engineering, Architecture, and Elite Editions, with prices starting at $29/month.