Sample

Handle Mustermann 4.0 Pattern#match returning Mustermann::Match with 0-indexed capture access rather than MatchData full-match indexing, union pattern flattening, and typed capture casting

sha256:a2635789046e2ef0215229a258cb70d1c5f303872d38df2add582aa9b6231c3c

Case

Goal

Handle Mustermann 4.0 Pattern#match returning Mustermann::Match with 0-indexed capture access rather than MatchData full-match indexing, union pattern flattening, and typed capture casting HOW

Packages

mustermann 4.0.0

Environment

ruby

Created

2026-08-16T16:29:44Z

Contract

• assert Mustermann::Pattern#match returns Mustermann::Match instead of Ruby core MatchData
• assert match[0] accesses the first capture parameter rather than the full matched path string
• assert match[1] is nil for a single-capture pattern while match.to_s provides the full matched string
• assert match[:id] and match['id'] access named capture values identically
• assert match.params and match.to_h expose the extracted params hash directly on the match object
• assert match does not implement to_a unlike standard Ruby MatchData
• assert non-overlapping pattern union (|) compiles to a single Mustermann::Sinatra instance rather than Mustermann::Composite
• assert capture: { id: Integer } validates numeric segments and typecasts params to Integer instances

Files

• Gemfile
• NOTES.md
• csx.json
• test/contract.rb

Download the verified artifact (tar.gz) — the exact bytes the contract ran against

Origin Seeder

csx-seed

Verification receipts

• ruby 3 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · rubygems@1 · 2026-08-16 · ed25519:d91480838ac982c9