Sample
heck 0.5.0: heck::ToShoutyKebabCase
Verified sample for cargo heck 0.5.0: heck::ToShoutyKebabCase. The contract ran on rust 1 · linux alpine/x64 · docker and passed.
sha256:66cf97847f2118323a813ed1fcc01ef1b19105304f46af5137808a45c11845e5
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 · alpine · musl 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::ToShoutyKebabCase in pkg:cargo/heck@0.5.0
- Packages
- Symbols
-
- heck::ToShoutyKebabCase
- Created
- 2026-10-13T18:41:55Z
Contract
- ToShoutyKebabCase::to_shouty_kebab_case converts CamelCase and PascalCase strings to SHOUTY-KEBAB-CASE
- ToShoutyKebabCase::to_shouty_kebab_case converts snake_case and space-separated strings to SHOUTY-KEBAB-CASE
- ToShoutyKebabCase::to_shouty_kebab_case splits acronyms and alphanumeric boundaries into uppercase hyphenated words
- ToShoutyKebabCase::to_shouty_kebab_case collapses redundant delimiters and preserves empty strings
- ToShoutyKebabCase::to_shouty_kebab_case works on both string slices and owned String values
Files
- Cargo.lock
- Cargo.toml
- PROMPT.md
- csx.json
- spec.json
- src/lib.rs
- test/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-to-shouty-kebab-case"
version = "1.0.0"
dependencies = [
"heck",
]
[package]
name = "sample-heck-to-shouty-kebab-case"
version = "1.0.0"
edition = "2021"
publish = false
[dependencies]
heck = "=0.5.0"
[[bin]]
name = "contract"
path = "test/contract.rs"
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::ToShoutyKebabCase 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::ToShoutyKebabCase
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:baea10acc2b85dd94b7a07a44087f29d20cc4dd75e7127ac3de57d421d9da887","contract":["ToShoutyKebabCase::to_shouty_kebab_case converts CamelCase and PascalCase strings to SHOUTY-KEBAB-CASE","ToShoutyKebabCase::to_shouty_kebab_case converts snake_case and space-separated strings to SHOUTY-KEBAB-CASE","ToShoutyKebabCase::to_shouty_kebab_case splits acronyms and alphanumeric boundaries into uppercase hyphenated words","ToShoutyKebabCase::to_shouty_kebab_case collapses redundant delimiters and preserves empty strings","ToShoutyKebabCase::to_shouty_kebab_case works on both string slices and owned String values"],"goal":"verify heck::ToShoutyKebabCase in pkg:cargo/heck@0.5.0","kind":"HOW","packages":["pkg:cargo/heck@0.5.0"],"schemaVersion":1,"symbols":["heck::ToShoutyKebabCase"]},"contractCommand":["cargo","run","--offline"],"environment":{"arch":"x64","distro":"alpine","ecosystem":"cargo","libc":"musl","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::ToShoutyKebabCase"],"verifierAdapter":"cargo@1"}
{
"schemaVersion": 1,
"goal": "verify heck::ToShoutyKebabCase in pkg:cargo/heck@0.5.0",
"kind": "HOW",
"packages": [
"pkg:cargo/heck@0.5.0"
],
"symbols": [
"heck::ToShoutyKebabCase"
]
}
//! Clean-room verification sample for heck::ToShoutyKebabCase.
pub use heck::ToShoutyKebabCase;
use heck::ToShoutyKebabCase;
fn main() {
// 1. Convert CamelCase / PascalCase to SHOUTY-KEBAB-CASE
assert_eq!("WeAreGoingToInheritTheEarth".to_shouty_kebab_case(), "WE-ARE-GOING-TO-INHERIT-THE-EARTH");
assert_eq!("camelCaseIdentifier".to_shouty_kebab_case(), "CAMEL-CASE-IDENTIFIER");
// 2. Convert snake_case and space-separated text to SHOUTY-KEBAB-CASE
assert_eq!("snake_case_example".to_shouty_kebab_case(), "SNAKE-CASE-EXAMPLE");
assert_eq!("Hello World".to_shouty_kebab_case(), "HELLO-WORLD");
// 3. Handle acronyms and digits appropriately
assert_eq!("XMLHttpRequest".to_shouty_kebab_case(), "XML-HTTP-REQUEST");
assert_eq!("field2Value".to_shouty_kebab_case(), "FIELD2-VALUE");
// 4. Handle empty string and punctuation boundaries
assert_eq!("".to_shouty_kebab_case(), "");
assert_eq!("---already---kebab---".to_shouty_kebab_case(), "ALREADY-KEBAB");
// 5. Works on String as well as &str
let owned = String::from("OwnedStringExample");
assert_eq!(owned.to_shouty_kebab_case(), "OWNED-STRING-EXAMPLE");
println!("All heck::ToShoutyKebabCase contract assertions passed.");
}
Origin Seeder
anonymous