Two things landed today.
MIT
fson — and the whole fedem library family (cparse, callonce, plugin, the editor tooling) — is now MIT-licensed. It was Proprietary; that made no sense for a config-parsing library whose value is being used. A permissive licence is what lets it be reviewed, packaged, and picked up; a proprietary one just blocked all of that. The notation itself was always free to implement — now the reference C++ implementation is too.
The names FSON / FEDEM and the branding stay reserved (each repo has a TRADEMARKS.md): use the code freely, but a fork renames.
1.0.0
The API has been stable since the writer dialects and %include arrived — v1.0.0 marks it. There is no API change from the last 0.12.x; it is a version and SOVERSION bump (the soname is libfson.so.1 now) plus the first published source archive.
Grab it from Downloads — a git archive snapshot at the v1.0.0 tag, .tar.gz / .zip with SHA-256 sidecars. cparse (the parsing core) comes in as a Conan package; conan install . in the extracted tree pulls it.
sha256sum -c fson-1.0.0.tar.gz.sha256
tar xzf fson-1.0.0.tar.gz && cd fson-1.0.0
conan install . && cmake -B build && cmake --build build
What's in it: lossless comment-preserving round-trips, a JSON / JSON5 superset grammar, %include with provenance, a reload-staleness probe, the fson-check CLI, and a generated Doxygen API reference alongside the hand-written Reference Manual.
Post-1.0, breaking changes stay allowed with a major bump — there is no cross-major compatibility promise. But the shape of the thing is settled.
