Sample
json 2.9.1: Preserve Ruby object and key types across JSON serialization boundaries without falling into as_json omission, symbolize_names and create_additions incompatibility, or silent key collision data loss
Verified sample for gem json 2.9.1: Preserve Ruby object and key types across JSON serialization boundaries without falling into as_json omission…
sha256:274b26e9f2c0a58c7a444f4d62e6bb7ca665c0f5f1069a445b9faa8adecd8b4d
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 rubygems
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 |
2026-08-16 |
| 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
- Preserve Ruby object and key types across JSON serialization boundaries without falling into as_json omission, symbolize_names and create_additions incompatibility, or silent key collision data loss
- Packages
- Symbols
-
- JSON.parse
- JSON.generate
- JSON.create_id
- Object#to_json
- Environment
- ruby
- Created
- 2026-08-16T17:36:59Z
Contract
- assert JSON.parse raises ArgumentError when :symbolize_names and :create_additions are combined, making addition deserialization mutually exclusive with key symbolization
- assert JSON.generate ignores as_json and serializes arbitrary objects to inspect strings unless to_json is defined, while a to_json returning a Hash raises TypeError
- assert JSON.parse with create_additions: true instantiates registered domain objects via json_create, whereas custom create_id mismatch or missing json_create returns a plain Hash and uninitialized classes raise ArgumentError
- assert JSON.generate stringifies non-string hash keys where nil becomes an empty string, and colliding stringified keys silently overwrite earlier values on parse
- assert core Ruby types like Range and Symbol require json/add extensions to encode json_class structures, which default JSON.parse reads as Hash and create_additions: true restores to exact instances
Files
- Gemfile
- NOTES.md
- csx.json
- src/type_boundary.rb
- test/contract.rb