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act101
$29Starting price
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About act101
act101 provides a deterministic merge gate and AST refactoring tool designed to work with coding agents. It analyzes code changes, executes refactors, and attests to the results with signed receipts and rollback capabilities. The tool supports 163 programming languages through grammars and operates via MCP and CLI with a native binary. It addresses architectural drift caused by agent-driven code changes by classifying each modification, identifying tests that cover the affected code, and producing a deterministic verdict (MERGE, REVIEW, or BLOCK) with a proof of correctness. The workflow consists of three stages: Analyze, Act, and Attest. Analyze uses 42 analyzers to map code structure before changes are made, Act performs 182 refactoring operations across files, and Attest applies 6 verification operations to classify changes and generate a signed receipt. This closed loop aims to maintain codebase integrity at agent speed.
Key features
- 42 codebase analyzers for structural mapping
- 182 refactoring operations including rename, extract, inline, and modernize
- 6 verification operations with deterministic verdicts
- Signed receipts and one-command rollback
- Cross-file refactoring with single invocation
- MCP and CLI support
- Git overlay and taint analysis in higher tiers
- Legacy language support in Elite Edition
Use cases
- Verifying agent-driven refactors before merging
- Maintaining architectural integrity in large codebases
- Porting and modernizing legacy code across languages
Pros
- Supports 163 programming languages via grammars
- Deterministic merge gate with signed receipts and rollback
- Three-stage workflow: Analyze, Act, Attest
- CLI and MCP interface with native binary
- Free Builder Edition for non-commercial and open-source use
Cons
- Not intended for solo autocomplete users
- Commercial tiers require paid subscription
- Limited to 138 grammars in free Builder Edition
- No free tier for commercial use beyond Builder Edition
Frequently asked questions about act101
What does act101 do?
act101 is a deterministic merge gate and AST refactoring tool for coding agents. It analyzes code changes, performs refactors, and attests to the results with signed receipts and rollback capabilities.
Who is act101 designed for?
It suits individual engineers verifying agent refactors, codebase owners monitoring structural drift, and open-source maintainers ensuring integrity in automated changes.
How does act101 integrate with coding agents?
Agents make changes, then act101 classifies the modification, identifies relevant tests, and issues a deterministic verdict (MERGE, REVIEW, or BLOCK) with a proof of correctness.
What programming languages does act101 support?
It supports 163 programming languages through grammars, enabling cross-language refactoring and analysis.
Does act101 offer a free tier?
Yes, act101 Builder Edition is free forever for personal, non-commercial, and open-source use, including agentic refactoring and limited analyzers.
How do I get started with act101?
Install the native binary via MCP or CLI, then use commands like 'act refactor' or 'act gate' to analyze, act, and attest code changes.
