Sample
commander 15.0.0: Preserve option value types on optional-value flags by configuring Option.preset() to prevent Commander from coercing valueless flags to boolean true and bypassing argParser
Verified sample for npm commander 15.0.0: Preserve option value types on optional-value flags by configuring Option.preset() to prevent Commander from…
sha256:4bf9cbc16740182dbe7fcca88866b9e64c94372e4115587056c4b525005ba078
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
- 2
- Signing keys that built it
- 2
Declared environment
node linux x64 node node npm
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-17 |
| node 22 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-18 |
Case
HOW- Goal
- Preserve option value types on optional-value flags by configuring Option.preset() to prevent Commander from coercing valueless flags to boolean true and bypassing argParser
- Packages
- Symbols
-
- Option.preset
- Option.default
- Option.argParser
- Option
- Command
- Environment
- node
- Created
- 2026-08-17T01:48:40Z
Contract
- Option.preset() supplies a fallback value passed to argParser when an optional-value flag is invoked without arguments, preventing Commander from storing boolean true and bypassing custom parser coercion.
- opts() contains boolean true instead of a parsed number when an optional-value option lacks a preset and is passed without an argument
- opts() retains the default value when the optional-value flag is omitted entirely
- opts() contains the parsed custom argument when the flag is passed with an explicit value
- accumulating option collectors append preset values on valueless flag invocations instead of having the entire accumulated array overwritten by boolean true
- options configured with choices validate against preset values rather than assigning boolean true outside the allowed choices list
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- src/index.mjs
- test/contract.mjs