Classgraph

Git A GHC typechecker plugin and browser visualizer for Haskell typeclass hierarchies. Drop the plugin onto a project, render the captured data as a self-contained interactive HTML page, and explore the inheritance DAG, class instances, type families, and superclass requirements with xdot-style highlighting. target package ───────────► per-module JSON dumps (built with the plugin) (.classgraph/*.json) │ ▼ classgraph-view ──────► classgraph.html (one self-contained file) What you get When you point the plugin at a target package and run the viewer, you get: ...

15 January 2026 · 14 min · 2893 words · Javier Sagredo

Sula

/'su.la/ for the suffix of capsule in Spanish, Cápsula. Git A Gemini protocol server written in Scryer Prolog. Requirements sula depends on a patched Scryer Prolog which can be found here (branch js/fixes). The required patches are: A native '$copy_stream'/2 builtin used for streaming binary file bodies to TLS clients without materialising the contents on the Prolog heap. A fix to library(pio)’s buffer_prepare_for_n/5 so that lazy reads from process pipes (and other streams whose at_end_of_stream/1 never reports true) terminate on EOF instead of spinning. A non-blocking poll loop in socket_server_accept/4 that checks Scryer’s INTERRUPT flag, so SIGINT becomes a catchable '$interrupt_thrown' exception instead of being trapped behind a blocking syscall. A port to rustls. A modification of tls_server_negotiate to include the optional client certificate. Build and install the patched Scryer: ...

3 min · 498 words · Javier Sagredo