Roadmap

go-ruby-uri/uri is grown test-first, each capability differential-tested against MRI rather than built in isolation. Ruby's URI library — the deterministic, interpreter-independent slice extracted from rbgo's internals — is complete.

Stage	What	Status
Parse & components	URI.parse(s) splitting scheme / userinfo / host / port / path / query / fragment, with the per-scheme generic/HTTP/HTTPS/FTP/LDAP shapes Ruby's URI uses.	Done
Build & merge	Constructing a URI from components and merge / + for relative-reference resolution, following RFC 3986 the way reference Ruby does.	Done
Normalize	normalize lower-casing the scheme and host, collapsing default ports and dot-segments, matching MRI byte-for-byte.	Done
encode_www_form & escaping	Form encoding/decoding and escape/unescape with Ruby's reserved-character tables.	Done
Error taxonomy	The URI::InvalidURIError / URI::InvalidComponentError / URI::BadURIError hierarchy, raised on the same inputs as reference Ruby.	Done
Differential oracle & coverage	A wide URI corpus parsed, built and normalized both here and by the system ruby/uri, compared byte-for-byte; 100% coverage, gofmt + go vet clean, green across all six 64-bit Go arches and three OSes.	Done

Documented out-of-scope boundaries

These are deliberate, recorded so the module's surface is unambiguous:

• No interpreter. The library implements the deterministic algorithm; it never runs arbitrary Ruby. Anything that needs a live binding or evaluation is the consumer's job — that is why rbgo binds this module rather than the reverse.
• Reference is reference Ruby (MRI). Byte-for-byte conformance targets MRI's behaviour; differences across MRI releases are matched to the reference used by the differential oracle.
• Standalone & reusable. The module has no dependency on the Ruby runtime; the dependency runs the other way.

See Usage & API for the surface and Why pure Go for the deterministic/interpreter split.