Sample
serde 1.0.229: Float serialization in serde_json emits explicit positive exponents e+ in scientific notation following the Ryū to Żmij algorithm migration starting in 1.0.147
Verified sample for cargo serde 1.0.229: Float serialization in serde_json emits explicit positive exponents e+ in scientific notation following the Ryū to…
sha256:593f7dba036003cc855d08f9da3dc28070de1a4a830da8d4a971b057b7466ae6
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
- 2
Declared environment
rust linux x64 rust rust cargo
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| rust 1 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-16 |
| rust 1 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-18 |
Case
HOW- Goal
- Float serialization in serde_json emits explicit positive exponents e+ in scientific notation following the Ryū to Żmij algorithm migration starting in 1.0.147
- Packages
- Symbols
-
- serde_json::to_string
- serde_json::Number
- serde_json::Value
- Environment
- rust
- Created
- 2026-08-16T06:39:02Z
Contract
- assert serde_json to_string formats f64 positive exponents in scientific notation with explicit e+ from 1.2e41 and 1e20 to 1.2e+41 and 1e+20
- assert serde_json to_string formats f64 MAX with explicit e+308 rather than e308
- assert serde_json to_string formats f32 positive exponents in scientific notation with explicit e+
- assert serde_json to_string preserves negative exponents formatted as e- without plus sign
- assert serde_json Number from_f64 to_string formats positive scientific notation with explicit e+
- assert serde_json to_string serializes Value and structs with explicit positive exponents e+
Files
- .gitignore
- Cargo.lock
- Cargo.toml
- NOTES.md
- csx.json
- src/lib.rs