Buf's Guide to Protobuf. Home of the language spec and grammar for the Protobuf IDL.
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Jun 9, 2026 - CSS
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language-spec
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SimpleScript, A Simpler Programming Language (WIP)
javascript language programming-language rust typescript interpreter fsharp jvm llvm ocaml wysiwyg scripting-language sml functional-language hindley-milner language-experiment simplescript language-spec
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Nov 27, 2022 - Rust
Visualizing computer code 🔶↜🔵
programming-language visual-programming-language diagrams diagramming diagrams-as-code language-spec
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Nov 17, 2023 - JavaScript
Informal Specification of the Uncommon Language Framework (ULF)
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Nov 8, 2024
Unofficial, community MCP for the TC39 specs (not affiliated with Ecma/TC39). SHA-pinned ECMA-262 + ECMA-402, AOID-aware search, cross-spec references, edition diffs, git history — read-only, deterministic, hosted-safe.
javascript mcp ecmascript intl specification agents tc39 ecma262 ecma402 ai-tools language-spec model-context-protocol
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Jun 12, 2026 - TypeScript
MCP server for the WebAssembly specification. SHA-pinned instructions, types, sections, full-text search, and proposals — read-only, deterministic, hosted-safe. Not affiliated with the W3C WebAssembly CG/WG.
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Jun 13, 2026 - TypeScript
M Standard
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May 11, 2026 - Python
Deterministic rule language (RuleDSL v1.0) with versioned grammar contract and stable C SDK.
embedded sdk rule-engine dsl grammar deterministic c-api decision-engine language-spec deterministic-language abi-stable
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Mar 10, 2026 - C
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Jun 10, 2026
Interactive C23 language syntax diagrams with railroad visualizations and EBNF notation
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Mar 30, 2026 - TypeScript
DSM language layer: ANTLR4 grammar (DSM.g4) plus two JSON wire formats — dsm-json (the model) and viper-value-json (values). A producer-neutral MIT contract for editors, code generators, and runtimes.
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May 27, 2026 - ANTLR
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