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act101

Agentic debt, technical debt at agent iteration speed, compounds whether you're watching or not.

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Description

Agentic debt, technical debt at agent iteration speed, compounds whether you're watching or not. act101 is quality infrastructure for AI-written code: deterministic refactoring and porting across 163 grammars, and a merge gate (act gate) that returns the same MERGE / REVIEW / BLOCK verdict for...

About act101

What is act101?

act101 is a native code-analysis and refactoring tool for AI coding agents, exposing structural operations, verification, checkpoints, and a merge gate through MCP and a CLI.

What act101 does

It queries code structure, changes symbols and modules through parameterized operations, and returns verification receipts. The workflow combines analysis, action, and attestation, with undo and redo for refactoring checkpoints. Higher editions add structural analysis, language coverage, and porting workflows.

Who act101 is for

It is for engineers whose coding agents make structural changes, including commercial developers, architecture teams, and organizations planning legacy modernization.

How act101 works

Users install the native binary and connect it to a coding agent through MCP or the CLI. The agent queries symbols, references, and callers, applies a supported refactor, and inspects verification results. The merge gate returns a verdict and receipt before the change is merged.

Key features

  • Structural queries cover outlines, references, callers, and call graphs.
  • Builder includes rename and automatic fixes.
  • Engineering adds extract, inline, wrap, and introduce operations.
  • Refactor verification produces receipts.
  • Automatic checkpoints support undo and redo.
  • Architecture adds decomposition, scaffolding, and taint analysis.
  • Elite adds premium language grammars.
  • Porting workflows track contracts, symbols, ordering, and parity.

Pricing

As listed on act101.ai, checked 14 October 2026. Prices can change; see the site for current terms.

  • Builder: $0.
  • Engineering: $29 per month or $299 per year.
  • Architecture: $59 per month or $599 per year.
  • Elite: $99 per month or $999 per year.

Facts from act101.ai, checked 14 October 2026

  • Checkout is handled by Paddle.
  • The source and releases are linked on GitHub.

Written from act101's own website (Homepage, Pricing, About, Docs). The maker can claim this listing to edit it.

Categories

AI & Machine LearningDeveloper ToolsWriting & Content

Frequently asked questions

Which agent interfaces are available?

The binary exposes both MCP and CLI operations for agents such as Claude Code, Cursor, Codex, and OpenCode.

Can Builder be used commercially?

Builder is described for personal, non-commercial, and open-source work; Engineering adds a commercial license.

Is porting a single automatic step?

The FAQ describes a step-by-step workflow with a manifest and parity checks, especially for larger migrations.

Can changes be reversed?

Refactoring checkpoints support operation history, undo, and redo.

Is a trial listed?

The pricing page offers a 7-day free trial with all features.

How is team licensing offered?

Architecture lists team licensing, while Enterprise and Fleet use tailored organizational or autonomous-agent terms.