act101

About act101

act101 is a native binary that wraps a determinism layer around AI-written code changes, addressing the specific failure mode where the diff is green, the tests pass, and the architecture is quietly worse than yesterday. It runs a three-stage loop. Analyze offers forty-one analyzers covering dead code, dependency cycles, coupling, hotspots, and seams — mapping the structure before anything touches it. Act performs 183 deterministic refactors including rename, extract, inline, move, wrap, introduce, and modernize, applied cross-file in one invocation and reported as structured JSON with a checkpoint id. Attest supplies six verify operations plus `act gate`, which classifies each changed function, finds the tests that actually reach it, diffs the side effects, and returns a deterministic MERGE, REVIEW, or BLOCK verdict with a signed receipt. The distinction the tool draws is between a format-only change (which clears the gate) and a behavior change covered by tests (which routes to a human and is never auto-merged). Because every operation writes a checkpoint, `act history undo` gives you the "undo the last three agent actions" that git archaeology otherwise cannot. It covers 163 language grammars and exposes both an MCP server and a CLI, so an agent can drive it directly. There is also act101 online, a GitHub-native AI-code health scanner for repos your agent writes.

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