CodeSampleX

Sample

clap_builder 4.6.6

Verified sample for cargo clap_builder 4.6.6. The contract ran on rust 1 · linux alpine/x64 · docker and passed: Command builder creates commands with name…

sha256:8832fb7586e6dc8f66f61e903de606c00531af4a5c89a607211e4f1cbdc1b42a

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…		 2026-09-19

Case

HOW
Goal
verify pkg:cargo/clap_builder@4.6.6
Packages
Created
2026-09-18T23:48:09Z

Contract

  1. Command builder creates commands with name, version, and about metadata
  2. Arg builder adds positional and flag arguments with default actions
  3. Command validates required arguments and returns MissingRequiredArgument error
  4. Subcommands parse hierarchical command lines and expose nested matches
  5. Arg with SetTrue action operates as a boolean toggle flag
  6. Arg with default value supplies fallback when argument is omitted

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 = "anstream"
version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "824a212faf96e9acacdbd09febd34438f8f711fb84e09a8916013cd7815ca28d"
dependencies = [
 "anstyle",
 "anstyle-parse",
 "anstyle-query",
 "anstyle-wincon",
 "colorchoice",
 "is_terminal_polyfill",
 "utf8parse",
]

[[package]]
name = "anstyle"
version = "1.0.14"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "940b3a0ca603d1eade50a4846a2afffd5ef57a9feac2c0e2ec2e14f9ead76000"

[[package]]
name = "anstyle-parse"
version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "52ce7f38b242319f7cabaa6813055467063ecdc9d355bbb4ce0c68908cd8130e"
dependencies = [
 "utf8parse",
]

[[package]]
name = "anstyle-query"
version = "1.1.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "40c48f72fd53cd289104fc64099abca73db4166ad86ea0b4341abe65af83dadc"
dependencies = [
 "windows-sys",
]

[[package]]
name = "anstyle-wincon"
version = "3.0.11"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "291e6a250ff86cd4a820112fb8898808a366d8f9f58ce16d1f538353ad55747d"
dependencies = [
 "anstyle",
 "once_cell_polyfill",
 "windows-sys",
]

[[package]]
name = "clap_builder"
version = "4.6.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7b48fea5a88e9ae728a2dcbedbfc0e730f7d60da42e1cb049a83c9fb8b789889"
dependencies = [
 "anstream",
 "anstyle",
 "clap_lex",
 "strsim",
]

[[package]]
name = "clap_lex"
version = "1.1.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1c133bc6a41be0d194c306b5506d15e6feeea7b1d6604bd3f8310dfb2ca96486"

[[package]]
name = "colorchoice"
version = "1.0.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1d07550c9036bf2ae0c684c4297d503f838287c83c53686d05370d0e139ae570"

[[package]]
name = "is_terminal_polyfill"
version = "1.70.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a6cb138bb79a146c1bd460005623e142ef0181e3d0219cb493e02f7d08a35695"

[[package]]
name = "once_cell_polyfill"
version = "1.70.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "384b8ab6d37215f3c5301a95a4accb5d64aa607f1fcb26a11b5303878451b4fe"

[[package]]
name = "sample-clap-builder"
version = "1.0.0"
dependencies = [
 "clap_builder",
]

[[package]]
name = "strsim"
version = "0.11.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"

[[package]]
name = "utf8parse"
version = "0.2.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"

[[package]]
name = "windows-link"
version = "0.2.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5"

[[package]]
name = "windows-sys"
version = "0.61.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ae137229bcbd6cdf0f7b80a31df61766145077ddf49416a728b02cb3921ff3fc"
dependencies = [
 "windows-link",
]
Cargo.toml
[package]
name = "sample-clap-builder"
version = "1.0.0"
edition = "2021"
publish = false

[dependencies]
clap_builder = "=4.6.6"

[[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/clap_builder@4.6.6
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:cargo/clap_builder@4.6.6

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:cd9aa2a2831e72b7009a504549fc0b5201e61b3bbe334e824adbcf481beb46b2","contract":["Command builder creates commands with name, version, and about metadata","Arg builder adds positional and flag arguments with default actions","Command validates required arguments and returns MissingRequiredArgument error","Subcommands parse hierarchical command lines and expose nested matches","Arg with SetTrue action operates as a boolean toggle flag","Arg with default value supplies fallback when argument is omitted"],"goal":"verify pkg:cargo/clap_builder@4.6.6","kind":"HOW","packages":["pkg:cargo/clap_builder@4.6.6"],"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/clap_builder@4.6.6"],"schemaVersion":1,"subject":"pkg:cargo/clap_builder@4.6.6","verifierAdapter":"cargo@1"}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:cargo/clap_builder@4.6.6",
  "kind": "HOW",
  "packages": [
    "pkg:cargo/clap_builder@4.6.6"
  ]
}
src/lib.rs
//! Clean-room verification sample for clap_builder.

pub use clap_builder::*;
test/contract.rs
use clap_builder::{Arg, ArgAction, Command};

fn main() {
    // 1. Command builder creates commands with name, version, and about metadata
    let cmd = Command::new("demo")
        .version("1.0.0")
        .about("A demonstration CLI tool");
    assert_eq!(cmd.get_name(), "demo");
    assert_eq!(cmd.get_version(), Some("1.0.0"));
    assert_eq!(cmd.get_about().map(|a| a.to_string()), Some("A demonstration CLI tool".to_string()));

    // 2. Arg builder adds positional and flag arguments with default actions
    let cmd = Command::new("testapp")
        .arg(Arg::new("name").required(true).index(1))
        .arg(Arg::new("verbose").short('v').long("verbose").action(ArgAction::Count))
        .arg(Arg::new("output").short('o').long("output").action(ArgAction::Set));

    let matches = cmd.try_get_matches_from(vec!["testapp", "alice", "-vvv", "-o", "result.txt"]).unwrap();
    assert_eq!(matches.get_one::<String>("name").map(|s| s.as_str()), Some("alice"));
    assert_eq!(matches.get_count("verbose"), 3);
    assert_eq!(matches.get_one::<String>("output").map(|s| s.as_str()), Some("result.txt"));

    // 3. Command validates required arguments and returns MissingRequiredArgument error
    let cmd = Command::new("testapp")
        .arg(Arg::new("name").required(true));
    let err = cmd.try_get_matches_from(vec!["testapp"]).unwrap_err();
    assert_eq!(err.kind(), clap_builder::error::ErrorKind::MissingRequiredArgument);

    // 4. Subcommands parse hierarchical command lines and expose nested matches
    let root = Command::new("git")
        .subcommand(
            Command::new("clone")
                .arg(Arg::new("repo").required(true))
        );
    let matches = root.try_get_matches_from(vec!["git", "clone", "https://example.com/repo.git"]).unwrap();
    let (sub_name, sub_matches) = matches.subcommand().unwrap();
    assert_eq!(sub_name, "clone");
    assert_eq!(sub_matches.get_one::<String>("repo").map(|s| s.as_str()), Some("https://example.com/repo.git"));

    // 5. Arg with SetTrue action operates as a boolean toggle flag
    let cmd = Command::new("flagtest")
        .arg(Arg::new("flag").long("dry-run").action(ArgAction::SetTrue));
    let matches = cmd.clone().try_get_matches_from(vec!["flagtest", "--dry-run"]).unwrap();
    assert_eq!(matches.get_flag("flag"), true);
    let matches_absent = cmd.try_get_matches_from(vec!["flagtest"]).unwrap();
    assert_eq!(matches_absent.get_flag("flag"), false);

    // 6. Arg with default value supplies fallback when argument is omitted
    let cmd = Command::new("deftest")
        .arg(Arg::new("port").long("port").default_value("8080"));
    let matches = cmd.try_get_matches_from(vec!["deftest"]).unwrap();
    assert_eq!(matches.get_one::<String>("port").map(|s| s.as_str()), Some("8080"));

    println!("All clap_builder contract assertions passed successfully.");
}

Origin Seeder

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