CodeSampleX

Sample

windows-targets 0.52.6

Verified sample for cargo windows-targets 0.52.6. The contract ran on rust 1 · linux alpine/x64 · docker and passed: link! declares and links standard C ABI…

sha256:820ba13b672959679f1183df00f87b2e96476397cc19e107490c992dcd60bfb6

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…		 2026-09-16

Case

HOW
Goal
verify pkg:cargo/windows-targets@0.52.6
Packages
Created
2026-09-16T23:05:30Z

Contract

  1. link! declares and links standard C ABI functions with 32-bit integer parameters
  2. link! handles 64-bit integer parameters and return values
  3. link! handles character conversion functions across FFI boundaries
  4. link! handles raw pointer arguments for string length calculation

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 = "sample-windows-targets"
version = "1.0.0"
dependencies = [
 "windows-targets",
]

[[package]]
name = "windows-targets"
version = "0.52.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
dependencies = [
 "windows_aarch64_gnullvm",
 "windows_aarch64_msvc",
 "windows_i686_gnu",
 "windows_i686_gnullvm",
 "windows_i686_msvc",
 "windows_x86_64_gnu",
 "windows_x86_64_gnullvm",
 "windows_x86_64_msvc",
]

[[package]]
name = "windows_aarch64_gnullvm"
version = "0.52.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"

[[package]]
name = "windows_aarch64_msvc"
version = "0.52.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"

[[package]]
name = "windows_i686_gnu"
version = "0.52.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"

[[package]]
name = "windows_i686_gnullvm"
version = "0.52.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"

[[package]]
name = "windows_i686_msvc"
version = "0.52.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"

[[package]]
name = "windows_x86_64_gnu"
version = "0.52.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"

[[package]]
name = "windows_x86_64_gnullvm"
version = "0.52.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"

[[package]]
name = "windows_x86_64_msvc"
version = "0.52.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
Cargo.toml
[package]
name = "sample-windows-targets"
version = "1.0.0"
edition = "2021"
publish = false

[dependencies]
windows-targets = "=0.52.6"

[[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 pkg:cargo/windows-targets@0.52.6
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:cargo/windows-targets@0.52.6

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:c0a29167b48a2fd20910ad67d38b4abfc08e0e7f8324c6bd7e527215dade1138","contract":["link! declares and links standard C ABI functions with 32-bit integer parameters","link! handles 64-bit integer parameters and return values","link! handles character conversion functions across FFI boundaries","link! handles raw pointer arguments for string length calculation"],"goal":"verify pkg:cargo/windows-targets@0.52.6","kind":"HOW","packages":["pkg:cargo/windows-targets@0.52.6"],"schemaVersion":1},"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/windows-targets@0.52.6"],"schemaVersion":1,"subject":"pkg:cargo/windows-targets@0.52.6","verifierAdapter":"cargo@1"}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:cargo/windows-targets@0.52.6",
  "kind": "HOW",
  "packages": [
    "pkg:cargo/windows-targets@0.52.6"
  ]
}
src/lib.rs
//! Clean-room verification sample for windows-targets.

pub use windows_targets::*;
test/contract.rs
use windows_targets::link;

// 1. Declare standard C ABI function with single 32-bit integer argument and return
link!("c" "C" fn abs(x: i32) -> i32);

// 2. Declare standard C ABI function with 64-bit integer argument and return
link!("c" "C" fn labs(x: i64) -> i64);

// 3. Declare standard C ABI function with character argument and return
link!("c" "C" fn toupper(c: i32) -> i32);

// 4. Declare standard C ABI function with pointer argument
link!("c" "C" fn strlen(s: *const u8) -> usize);

fn main() {
    // 1. abs computes absolute value of 32-bit integer
    let val32 = unsafe { abs(-42) };
    assert_eq!(val32, 42);

    // 2. labs computes absolute value of 64-bit integer
    let val64 = unsafe { labs(-100_000_000_000i64) };
    assert_eq!(val64, 100_000_000_000i64);

    // 3. toupper converts lowercase ASCII character to uppercase
    let upper = unsafe { toupper(b'z' as i32) };
    assert_eq!(upper, b'Z' as i32);

    // 4. strlen computes length of null-terminated string
    let bytes = b"windows-targets\0";
    let len = unsafe { strlen(bytes.as_ptr()) };
    assert_eq!(len, 15);

    println!("All windows-targets contract assertions passed successfully.");
}

Origin Seeder

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