Two things people keep asking: why I'm the one building this, and why you'd reach for a procedural tool when your agent can already write code. Here are both answers.
I've spent a career building production software across financial services, geospatial, automotive, medical devices, and biotech — domains where a defect ships in a trading system, a navigation unit, a vehicle, or a life-critical device. I've led engineering teams and owned architecture through every class of problem the field presents.
That's why act101 isn't a guess at what engineers need. I know the challenges engineers and architects face because I've faced them in domains that don't tolerate error — and I know the canonical tooling those challenges demand. act101 is that tooling, rebuilt for agents.
Codex can refactor. So can any agent. The question is what you're trusting.
Non-deterministic, expensive, opaque. It re-reads files to guess at callers, burns tokens per turn, and leaves no clean way back. Change a method signature and it grinds through file after file one at a time — and you hope it caught them all.
100s of turnsProcedural, structurally-grounded, cheap, reversible. Change that signature across all 25 affected files in a single tool invocation — every reference updated, with a receipt that proves it, and rollback if you don't like it.
1 invocationSame job. One is a probability. The other is a proof.
Before I'd let an agent merge a million-plus lines into a binary I was going to ship under license, I had to be able to prove every change. Generation was never the bottleneck — agents generate all day. The bottleneck is prove: writing down what a change actually did, with evidence, against the contract it was supposed to preserve.
So I built that layer. Every act101 workflow has the same shape — analyze → act → attest — and they're the workflows I ran on my own codebase, every day, for ninety days. The product is the recursion: what I shipped is the toolchain I needed to ship it.
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