Glossary

Boson Cloud

Boson’s hosted proprietary platform: backend, web app, and related services. Not open source.

A Boson deployment running in your infrastructure (VPC / private cloud / on-prem) as proprietary Boson software—not an open-source server you build yourself. SDKs target its API the same way they target Boson Cloud.

Boson SDK

Open-source client libraries that send traces and use platform APIs only against Boson’s official backend (Boson Cloud or customer-deployed Boson).

Trace

One end-to-end run of your system (one request, one job, one chat turn).

Span

A step within a trace (LLM call, retrieval, tool execution).

Event

A structured payload attached to a span (inputs, outputs, metadata).

Dataset

A curated, versioned set of examples used for evaluation.

Evaluation run

Executing a workflow over a dataset to produce scores and artifacts.

Prompt version

A snapshot of a prompt template that can be reviewed, promoted, and rolled back.

Environment

A scope boundary (dev/staging/prod) for prompt versions, configs, and gates.