Sample
heck 0.5.0: heck::ToUpperCamelCase
Verified sample for cargo heck 0.5.0: heck::ToUpperCamelCase. The contract ran on rust 1 · linux alpine/x64 · docker and passed.
sha256:c3bf597076d3c428f3bb6d01de0600d10c6ce7851cda3710d0c4b4e8fbbc327c
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
- 1
- Signing keys that built it
- 1
Declared environment
linux x64 cargo
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| rust 1 · linux alpine/x64 · docker ed25519:c1973797be207ac4 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1rust:1-alpine@sha256:a10e64dd139b… |
2026-10-13 |
Case
HOW- Goal
- verify heck::ToUpperCamelCase in pkg:cargo/heck@0.5.0
- Packages
- Symbols
-
- heck::ToUpperCamelCase
- Created
- 2026-10-13T23:25:39Z
Contract
- heck::ToUpperCamelCase::to_upper_camel_case converts space, underscore, and hyphen delimited strings into UpperCamelCase
- heck::ToUpperCamelCase::to_upper_camel_case normalizes consecutive uppercase acronym segments into UpperCamelCase
- heck::ToUpperCamelCase::to_upper_camel_case returns an empty String for empty input
Files
- Cargo.lock
- Cargo.toml
- PROMPT.md
- csx.json
- spec.json
- src/main.rs
- tests/contract.rs
Source
# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 4
[[package]]
name = "heck"
version = "0.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
[[package]]
name = "sample-heck-upper-camel"
version = "0.1.0"
dependencies = [
"heck",
]
[package]
name = "sample-heck-upper-camel"
version = "0.1.0"
edition = "2021"
publish = false
[dependencies]
heck = "=0.5.0"
Clean-room public code sample — generation instructions
Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.
A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.
Goal: verify heck::ToUpperCamelCase in pkg:cargo/heck@0.5.0
Kind: HOW
Use EXACTLY these public packages and versions:
- pkg:cargo/heck@0.5.0
Demonstrate these symbols/APIs:
- heck::ToUpperCamelCase
Rules:
- One focused purpose; the smallest project that proves the goal.
- Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
- Pin every dependency with a lockfile so resolution is reproducible.
- No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
- No personal names, emails, company names, or project identifiers of any kind.
- No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
- Keep it under 200 files and 256KB packed.
{"case":{"caseId":"case:sha256:8f7543dee58037a8460c6663e7c428b1c3b756b09cc65e5a02ef9eac078142bd","contract":["heck::ToUpperCamelCase::to_upper_camel_case converts space, underscore, and hyphen delimited strings into UpperCamelCase","heck::ToUpperCamelCase::to_upper_camel_case normalizes consecutive uppercase acronym segments into UpperCamelCase","heck::ToUpperCamelCase::to_upper_camel_case returns an empty String for empty input"],"goal":"verify heck::ToUpperCamelCase in pkg:cargo/heck@0.5.0","kind":"HOW","packages":["pkg:cargo/heck@0.5.0"],"schemaVersion":1,"symbols":["heck::ToUpperCamelCase"]},"contractCommand":["cargo","run","--offline"],"environment":{"arch":"x64","ecosystem":"cargo","os":"linux","packageManager":"cargo","schemaVersion":1},"license":"MIT-0","packages":["pkg:cargo/heck@0.5.0"],"schemaVersion":1,"subject":"pkg:cargo/heck@0.5.0","symbols":["heck::ToUpperCamelCase"],"verifierAdapter":"cargo@1"}
{
"schemaVersion": 1,
"goal": "verify heck::ToUpperCamelCase in pkg:cargo/heck@0.5.0",
"kind": "HOW",
"packages": [
"pkg:cargo/heck@0.5.0"
],
"symbols": [
"heck::ToUpperCamelCase"
]
}
use heck::ToUpperCamelCase;
fn main() {
assert_eq!("WeAreNotInTheSameBoat", "We are not in the same boat".to_upper_camel_case());
assert_eq!("HelloWorld", "hello_world".to_upper_camel_case());
assert_eq!("HttpRequest", "http-request".to_upper_camel_case());
assert_eq!("XmlHttpRequest", "XML_HTTP_request".to_upper_camel_case());
assert_eq!("", "".to_upper_camel_case());
}
use heck::ToUpperCamelCase;
#[test]
fn contract_to_upper_camel_case() {
assert_eq!("WeAreNotInTheSameBoat", "We are not in the same boat".to_upper_camel_case());
assert_eq!("HelloWorld", "hello_world".to_upper_camel_case());
assert_eq!("HttpRequest", "http-request".to_upper_camel_case());
assert_eq!("XmlHttpRequest", "XML_HTTP_request".to_upper_camel_case());
assert_eq!("", "".to_upper_camel_case());
}
Origin Seeder
anonymous