- Fortran: use dlopen/dlsym at runtime instead of direct linking
(sandbox doesn't pass -lqrencode to gfortran)
- Both: try libqrencode.so.4, .so.3, .so in order
- Perl: use Text::QRCode (pure Perl, pre-installed) instead of Imager::QRCode
- Elixir: try Erlang :qrcode module, fallback to CLI
- OCaml: use Unix.open_process_in (no ctypes in compiled mode)
- Fortran: direct C FFI binding (requires -lqrencode at link)
Native QR generation for each language's ecosystem:
- 27 languages use package manager QR libraries (qrcode, rqrcode, ZXing, etc.)
- 10 languages use C FFI to libqrencode (dlopen, ISO_C_BINDING, @cImport, critcl)
- 2 shell languages use qrencode CLI (native shell paradigm)
- 1 language (Prolog) uses C FFI with CLI fallback
Section 9 added to test-sdk.sh with get_qr_file() mapping and
QR:unsandbox-qr-ok:ROWS pattern validation across the hydra matrix.
- Update all un.* implementations to use HMAC-SHA256 signing
- Headers: Authorization (Bearer public_key), X-Timestamp, X-Signature
- Signature: HMAC-SHA256(secret_key, "timestamp:METHOD:path:body")
- Fix test suite issues (bash arithmetic, ES module compat, TCL shebang)
- Add CLAUDE.md with inception testing documentation
- Update README.md with HMAC auth and dependency table
- All 38 implementations pass inception test via un2
