JanHenryNystrom/jhn_stdlib

This system is a general-purpose Erlang library providing foundational utilities for data serialization, binary processing, and network security. It implements encoding and decoding protocols such as CBOR, HPACK, and various base formats, alongside data structures like Bloom filters and consistent hashing algorithms. The library also includes infrastructure for managing TLS certificates and generic finite state machines, supported by a comprehensive test suite.

The include directory now provides a new \uri.hrl\ header file that defines the \uri\ record and the \scheme\ type. This introduces the data structure used to represent Uniform Resource Identifiers, including fields for scheme, userinfo, host, port, path, query, and fragment, making these definitions available to other modules that include this header.

include · high confidence

Added a suite of new Erlang modules for binary data handling: jhn\_base provides encoding/decoding for various bases (Base16, Base32, Base45, Base58, Base64, Base85, Z85, IPv6) with configurable alphabets and algorithms; jhn\_bencoding implements BitTorrent-style bencoding for serializing Erlang terms; jhn\_blist and jhn\_bstring offer binary-optimized replacements for standard lists and string operations; jhn\_bloom implements fixed and scalable Bloom filters; jhn\_cbor provides Concise Binary Object Representation encoding/decoding per RFC 8949; jhn\_chash implements consistent hashing using the Jump Consistent Hash algorithm; jhn\_fsm introduces a generic finite state machine with deferred message support; and jhn\_cacerts manages CA certificate retrieval and caching for SSL/TLS connections.

src · high confidence

The repository now includes an Apache License 2.0 file, a Makefile for building and testing, and a rebar.config file that configures the project for rebar3, including dependencies, dialyzer settings, and documentation generation. The README has been expanded to document the library's features, including support for various encoding/decoding protocols (CBOR, HPACK, JSON, MessagePack, Syslog, URI, IP addresses, Timestamps, UUIDs, TypeIDs), string processing, data structures (Bloom filters, prefix trees, range trees, t-trees), algorithms (Levenshtein distance, check digit algorithms, checksums, consistent hashing, compression), and utility modules (mocking, CA-certs, media type determination). Deprecated features are also listed.

(repo-wide) · high confidence

The application now ships with a local bundle of root CA certificates (priv/cacerts) to verify HTTPS connections. This ensures that TLS handshakes succeed even when the system's default certificate store is missing or outdated, and provides a stable baseline for certificate validation.

priv · high confidence

Added new eunit test modules (a\_jhn\_fsm, b\_jhn\_fsm, a\_jhn\_server) and test data files (TLS certificates and keys in test/certs, country codes in test/countries.txt) to support testing of the jhn\_fsm and jhn\_server behaviors, as well as existing tests for jhn\_base, jhn\_bencoding, jhn\_bloom, and jhn\_bstring.

test · high confidence

Written by watchdog.canine.dev from the codebase's own history, inside the signed delivery this page is composed from.

• CAI 48 → 48 (+0.0)
• Rubric changed (rubric-2026.09.12 → rubric-2026.09.18) — scores are not directly comparable.

• Code Health 88 → 88 (+0.0)
• Architecture 100 → 100 (+0.0)
• Maturity 43 → 43 (+0.0)
• Readiness 26 → 26 (+0.0)
• Security 100 → 100 (+0.0)

• Coverage not measured — no coverage collector is wired up
• Documentation: no installation or build instructions (README.md)
• Documentation: no project overview
• Documentation: no usage examples (README.md)

Written by watchdog.canine.dev from the codebase's own history, inside the signed delivery this page is composed from.

JanHenryNystrom/jhn_stdlib was measured the same way every project in this corpus was: the same rubric, at a pinned commit, with the result published in full. Point a surveyor at a repository you know and see whether you agree with it.