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Makes S1-model 'measurement' (and the collapse that follows it) a Ruby primitive.
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CommunityJev Repos & SDKs
S1 Ruby
Ruby gem that makes System One measurement a language primitive: psi prepares a state, judge/choose/score return calibrated distributions, and ? collapses them for control flow. Ships TypeSafe, protocol (/v1/systemone) and CUA providers behind one interface with its own spec suite.
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- 2
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- Ruby
- License
- MIT
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- Last verified
- Oct 2026
About this project
System One (S1) measurement — and the collapse that follows it — native to Ruby. An S1 model answers a typed question about data with a calibrated probability. It does not generate, and it does not decide. Code asks; code decides. For the Ruby on Rails implementation, see: s1-rails. For the terms, see THEORY.md. Where this README and the theory disagree, the theory is right. The three kinds — noul · choice · score · Level · Scales · Distribution · Batch · Structured state · Reading distributions.
Quoted from the project's README. Read the full README.
Highlights
- No runtime dependencies; requires Ruby 3.2 or newer.
- judge, choose and score return full distributions, and a ? method collapses them to values.
- Providers: TypeSafe by default, protocol for any /v1/systemone server, and CUA by checkpoint.
- The optional core extension adds primitives to String, Hash and Array, plus psi.
- S1.configure sets provider, timeout, threshold and logger, each with a default.
Watch out
MIT licensed. Real judgments need a TypeSafe API key or a self-hosted /v1/systemone server, and the psi/primitive extensions are experimental and off by default. A companion Rails gem lives at innocentdiaz/s1_rails.
Questions about this entry
Short answers drawn from the linked project or page.
A measurement returns a calibrated distribution over a scale; collapse is the code choosing to stop carrying it, turning the distribution into a category - a boolean for a Noul, a Symbol for a Choice, an S1::Level for a Score - through one contract, collapse(threshold). The README argues for collapsing late where the number matters.
Yes. Besides the default TypeSafe provider, a protocol provider targets any /v1/systemone endpoint such as Laya or a self-hosted server, with configurable base URL, path and optional bearer token. A CUA provider keyed by checkpoint is also included for form-style checkpoints.
It needs Ruby 3.2 or newer and has no runtime dependencies; real judgments require a TypeSafe API key or a self-hosted /v1/systemone server.
Use a measure block: q.judge, q.choose and q.score can be queued inside one call, and each returns its own calibrated distribution rather than a single collapsed value.
The primitives and psi extensions, off by default, add judge, choose and score methods to String, Hash and Array plus a psi state builder; the README calls these experimental.
Yes. Judgments act as predicates and enumerable methods such as select, group_by, sort_by and sum work over them, and a lens passed with given changes what the question is judged against.
Provider, per-request timeout, the noul threshold, an optional logger, whether the core primitives and psi are enabled, and the TypeSafe API key which defaults to the TYPESAFE_API_KEY environment variable.
Related terms
Glossary definitions related to this entry.
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