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A Go client for the TypeSafe System One API — typed judgments and probabilities, zero dependencies outside the standard library.
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TypeSafe Go — 2389-research
A Go client for the TypeSafe System One API with zero dependencies outside the standard library: typed Noul, Choice and Score questions whose answers are read back through the handles that asked them.
- Stars
- 2
- Language
- Go
- License
- MIT
- Reading time
- 2 min
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- Author
- 2389-research
- Last verified
- Oct 2026
This is one of several Jev listings for the same project. The canonical entry is TypeSafe Go — sd109.
Highlights
- Question handles carry their own id and answer type, so you read answers back through the question that asked it and the compiler checks the answer's shape.
- From checks that the response carries every documented payload field: a truncated answer reports ErrIncompleteAnswer instead of reading as a confident zero.
- Noul returns a float64 probability of yes, Choice returns winner, full distribution and confidence, and Score returns a weighted value over ordered levels.
- Retries are built in: two retries, 500 ms doubling to 5 s with 25% jitter, honoring Retry-After.
- Config comes from TYPESAFE_API_KEY, TYPESAFE_BASE_URL and TYPESAFE_DEFAULT_MODEL, or options like WithModel and WithTimeout.
Quickstart
bash
go get github.com/2389-research/typesafe-goWatch out
Grounded in the truncated repository README and GitHub metadata reviewed on 2026-10-15; the README was cut off mid-sentence in the retry documentation. The compiler cannot check ids, so two handles sharing an id disagreeing about the type fail at read time with ErrWrongType rather than at compile time.
Questions about this entry
Short answers drawn from the linked project or page.
A Go client for the TypeSafe System One API. System One answers questions about content with a typed judgment and a probability instead of generated text you then have to parse, and the client has zero dependencies outside the standard library.
A question is a value you keep. It carries its own id and answer type, so you read the answer back through the question that asked it; the id appears once in your code, and the compiler checks the shape of the answer.
Noul asks yes or no and returns a float64 probability, with no confidence field because the probability is the answer. Choice picks one option from a set you define and returns the winner, full distribution and confidence. Score places the input on ordered levels and returns a weighted value.
From checks that the answer body carries every documented payload field. A truncated response, such as a missing noul or a Choice with no choice, reports ErrIncompleteAnswer rather than reading as a confident zero; a genuine zero still decodes.
Partially. The answer's shape is checked at compile time, so a Noul handle cannot hand you a ChoiceAnswer. The compiler cannot check ids: two handles can share an id and disagree about the type behind it, which fails at read time with ErrWrongType.
typesafe.New() reads TYPESAFE_API_KEY, with TYPESAFE_BASE_URL defaulting to api.typesafe.ai and TYPESAFE_DEFAULT_MODEL to jev-latest. Options include WithAPIKey, WithModel, WithTimeout, WithRetry and WithHTTPClient.
Yes. Transient failures retry automatically: two retries, 500 ms doubling to 5 s with 25% jitter, honoring Retry-After. The README also advises routing on the probability number rather than a bare threshold, since 0.95 and 0.51 both become yes after a cutoff.
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