Sample
set 1.1.1: Detect that Set set-difference on subclassed Sets preserves the receiver class in this release.
Verified sample for gem set 1.1.1: Detect that Set set-difference on subclassed Sets preserves the receiver class in this release. The contract ran on ruby 3…
sha256:74f27b7e9ea933f16fb0b9d8decfae3e4aa5028a3e5731325a135cb05701dade
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
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
- 1
Declared environment
ruby linux x64 ruby ruby bundler
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| ruby 3 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · rubygems@1 |
2026-08-16 |
| ruby 3 · linux debian/x64 · docker ed25519:2175b912ea1c23b1 | SKIPPED | compile:SKIPPED · contract:SKIPPED · load:SKIPPED · resolve:FAIL CONTAINER_RUN · rubygems@1 |
2026-08-18 |
Case
HOW- Goal
- Detect that Set set-difference on subclassed Sets preserves the receiver class in this release.
- Packages
- Symbols
-
- Set#^
- Environment
- ruby
- Created
- 2026-08-16T16:54:17Z
Contract
- assert Set#^ returns an object of the left operand's subclass when both operands are `Set` subclasses
- assert ((class AuditedSet < Set; end; (AuditedSet[1, 2] ^ AuditedSet[2, 3]).class == AuditedSet))
Files
- Gemfile
- NOTES.md
- csx.json
- test/contract.rb