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Higher-Order Abstract Syntax in Lean

A literate introduction to higher-order abstract syntax in Lean 4, written with Verso

Description excerpted from the original listing, which is linked below.

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Facts

Published: 25 Sep 2026 (24d ago)
Medium: web
First seen: 25 Sep 2026, 10:42 UTC

Built with

Cursor: confirmed
the agent's own trailer in the repository's commit history

What we can see

68 hygiene score

Certificate issued by YR1, 36 days remaining
Cookie attributes no cookies set
Credentials and payment does not ask for either
No strict transport security
Served over HTTPS
Mail authentication neither published
No insecure resources
Redirects none
Security headers 1 of 5 set, policy permits inline or evaluated script
Third-party origins 3
Transport security TLS 1.3

Observed 25 Sep 2026 by fetching the page as a browser would. This describes hygiene and transparency, not safety: a missing header does not make a site dangerous, and a complete set does not make it trustworthy.

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For a README (Markdown)

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Changes we have seen

25 Sep 2026 first indexed

Higher-Order Abstract Syntax in Lean

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