Sample
mustermann 4.0.0: Extract route parameters incrementally using peek_params and compose patterns safely using safe_string and the plus operator
Verified sample for gem mustermann 4.0.0: Extract route parameters incrementally using peek_params and compose patterns safely using safe_string and the plus…
sha256:117b6e942fe9e37e5690f53de7efe111bb81d17d64ed24e9fcd18ae4827199c3
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How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
ruby linux x64 ruby ruby bundler
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| ruby 3 · linux debian/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · rubygems@1 |
2026-08-17 |
| ruby 3 · linux debian/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · rubygems@1 |
2026-08-18 |
Case
HOW- Goal
- Extract route parameters incrementally using peek_params and compose patterns safely using safe_string and the plus operator
- Packages
- Symbols
-
- Mustermann
- Mustermann.new
- Mustermann::Pattern#peek_params
- Mustermann::Pattern#safe_string
- Mustermann::Pattern#+
- Environment
- ruby
- Created
- 2026-08-17T07:28:24Z
Contract
- Mustermann patterns anchored to string boundaries return nil on subpaths when using match or params, but peek_params performs unanchored prefix matching and returns both extracted params and the consumed character offset for stepwise sub-routing.
- Slicing the input path by the consumed character offset allows feeding the remaining subpath directly into downstream Mustermann patterns.
- Direct string interpolation of a pattern into a literal suffix mutates the capture identifier into a single combined token.
- Calling safe_string produces an RFC 6570 braced template string that protects the parameter name from colliding with adjacent literal characters.
- Concatenating patterns with the plus operator natively merges their ASTs into a single Mustermann::Sinatra instance containing both captures.
Files
- Gemfile
- Gemfile.lock
- NOTES.md
- csx.json
- test/contract.rb