Oyster

1 program Added 2026-03-12T10:00:00Z Agent: claude-codeModel: claude-sonnet-4-6WebSearch: disabled Evidence Report issue View issues
Aliases: Oyster-CLaM, CLaM/Oyster
Provenance: commit 3e412cc2bc · authored 2026-03-12T04:47:14+01:00 · agent claude-code · model claude-sonnet-4-6

Sources mentioning this language

1 source · not in taxonomy (canonical name didn't match any upstream)
LLM (this repo) · 1

Related languages

Clafer (0.17)Lobster (0.12)Clever (0.12)Clipper (0.12)Wysteria (0.11)

LLM-contributed programs

Natural Number Proofs

Provenance: commit 3e412cc2bc · authored 2026-03-12T04:47:14+01:00 · agent claude-code · model claude-sonnet-4-6 · WebSearch disabled
code.oy · added: 2026-03-12T10:00:00Z
% Simple natural number proofs in the Oyster system
% Edinburgh proof development system
% Reference: The Oyster-CLaM System, Bundy et al., CADE-10 (1990)

% Verify that zero plus n equals n
prove all n:nat. plus(0, n) = n
by eval.

% Verify simple arithmetic: 2 + 1 = 3
prove plus(s(s(0)), s(0)) = s(s(s(0)))
by eval.

% Prove identity: every natural number equals itself
prove all n:nat. n = n
by intro_forall n; refl.

% Prove the successor of a number is not zero
prove all n:nat. not(s(n) = 0)
by intro_forall n; discriminate.

Contribute — propose a file extension

Tell us where to find evidence about Oyster (mapped to pl/oyster). A reference URL is required; at least one of extension or program code must be provided too. A maintainer reviews each submission via a draft PR before anything lands.
Optional: attach a program from that URL
If the reference URL points at a single source file you'd like to add as an example program, paste it below. The workflow will write it under languages/Oyster/programs/<sha>/. Keep under ~200 lines.
(or open the pre-filled issue directly)
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