CodeSampleX

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

  1. ToShoutyKebabCase::to_shouty_kebab_case converts CamelCase and PascalCase strings to SHOUTY-KEBAB-CASE
  2. ToShoutyKebabCase::to_shouty_kebab_case converts snake_case and space-separated strings to SHOUTY-KEBAB-CASE
  3. ToShoutyKebabCase::to_shouty_kebab_case splits acronyms and alphanumeric boundaries into uppercase hyphenated words
  4. ToShoutyKebabCase::to_shouty_kebab_case collapses redundant delimiters and preserves empty strings
  5. 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

Download the source artifact (tar.gz)

Source

Cargo.lock
# 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",
]
Cargo.toml
[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"
PROMPT.md
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.
csx.json
{"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"}
spec.json
{
  "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"
  ]
}
src/lib.rs
//! Clean-room verification sample for heck::ToShoutyKebabCase.

pub use heck::ToShoutyKebabCase;
test/contract.rs
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