The Workbench ML Agent

Already Using Workbench?

Bosco ships with the Workbench REPL — see Using Bosco for how to drive him. Model access is a one-time setup: Security & Admin.

Workbench embeds an ML agent — Bosco — directly in the Python REPL. Chemists and data scientists describe what they want in plain language — "which compounds does this model get worst?", "build me a solubility model from this FeatureSet" — and Bosco writes the code, runs it in the live session, reads the output, and adjusts.

That turns exploratory ML work into a conversation. And Bosco carries Workbench conventions, so the code he produces looks like the code your team already writes.

One session, two drivers

The REPL and Bosco share a single session. You type Python when you want to; you talk to Bosco when that's faster — ask him to review the code you just wrote, show you an example, or take a task and run with it. Either way the work lands in the same namespace, so control passes back and forth without anything being copied or handed off.

Inside the Workbench REPL, you and the ML agent both write and run code in one shared session; you direct the agent by chat — review this, show me an example, take it from here — and variables persist for both of you

The loop runs against the real thing: the agent reads your actual FeatureSets, your actual model predictions, and your actual compounds, so its next suggestion is grounded in what your data really looks like rather than a description of it. And because it all happens in your session, it stops wherever you want — take the dataframe it just built and keep going by hand.

Where the work happens

Bosco runs Claude through Amazon Bedrock, so the whole loop stays inside your own AWS account — authenticated by the Workbench IAM role you already use, and billed on the same invoice as SageMaker. Every request is TLS-encrypted and signed with your role's credentials, and the model itself runs on AWS infrastructure in your region.

Most agent tooling instead reaches a model through a vendor API, which means an account to create, a key to distribute, and a second invoice. Going through Bedrock skips all of it:

	Vendor-hosted model API	Workbench on Bedrock
Setup	New vendor account, new API key	Automatic on AWS
Credentials on laptops	An API key per person	None — the AWS profile you already have
Cost	A separate invoice to reconcile	A line on your AWS bill
Adding a teammate	Issue and track another key	They already have the role
Your data	Exposed to a third party	Stays in your AWS account

Teams that want the details — IAM roles, retention settings, PrivateLink — will find them on the Security & Admin page.

Questions?

The SuperCowPowers team is happy to answer any questions you may have about AWS and Workbench. Please contact us at workbench@supercowpowers.com or chat us up on Discord