Sample
Prove how package:args handles options after the first positional argument with and without allowTrailingOptions
sha256:9c2b79c1311ca900d537157032629d24ae6621db433365d53aaa0caf30317f7b
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Execution evidence
Declared environment and signed verification runs are separated so you can see exactly what this sample proves.
Evidence basisSigned contract pass
Verification receipts1
Verification levelL3_CONTRACT_PASS
Declared environment
- Execution context
- dart
- Operating system
- linux
- Architecture
- x64
- Runtime
- dart
- Language
- dart
- Package manager
- pub
Verification-run environments
- Execution context
- dart 3
- Operating system
- linux debian · glibc
- Architecture
- x64
- Runtime
- dart 3
- Language
- dart
- Package manager
- pub
- Execution
- container · docker
CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · pub@1 · 2026-08-17
Case
- Goal
- Prove how package:args handles options after the first positional argument with and without allowTrailingOptions HOW
- Packages
-
args 2.7.0
- Environment
- dart
- Created
- 2026-08-17T03:53:23Z
Commonly assumed
ArgParser stops matching options at the first positional argument unless allowTrailingOptions is set to true.
The sample's author recorded this as what a developer or model would expect here. The contract below is what actually ran.
Contract
- ArgParser().parse(["data.bin", "--force"]) sets force to true and keeps only data.bin in rest because trailing options are enabled by default.
- ArgParser(allowTrailingOptions: false).parse(["data.bin", "--force"]) stops option parsing without throwing, leaves force false, and preserves both tokens in rest.
Files
- NOTES.md
- csx.json
- pubspec.lock
- pubspec.yaml
- test/contract.dart
Download the source artifact (tar.gz)
Origin Seeder
csx-seed
Verification receipts
- dart 3 · linux debian/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · pub@1 · 2026-08-17 · ed25519:d91480838ac982c9