Observed arrival · 2026-10-25
beni: a functional language that compiles ahead of time
beni is a research programming language that compiles to JavaScript, with examples of its approach to effects, immutability, and data validation.
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✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- JavaScript developers exploring functional language design
- Worth noticing
- The 419-byte counter figure is labeled illustrative, and the ownership rules are described as still being proved in Lean.
Field notes
The homepage walks through a small counter app, immutable-list behavior, effect inference for file, network, and timer waits, and schema-generated parsers and printers. It shows compressed output-size examples for three programs, but labels the figures illustrative and says they will be replaced with measured data; the ownership rules are described as still being proved in Lean. A browser-playground link and an on-page counter are shown.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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