Sample
verify @jridgewell/trace-mapping.GREATEST_LOWER_BOUND in pkg:npm/%40jridgewell/trace-mapping@0.3.31
sha256:c9be3635b280d25ad57a48d67c77c8fc6a00197b806a1b42535f5e7b3227b571
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
node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1node:22-alpine@sha256:c610fcdfb1d5… |
2026-08-27 |
Case
HOW- Goal
- verify @jridgewell/trace-mapping.GREATEST_LOWER_BOUND in pkg:npm/%40jridgewell/trace-mapping@0.3.31
- Packages
- Symbols
-
- @jridgewell/trace-mapping.GREATEST_LOWER_BOUND
- Environment
- node 22.23.2
- Created
- 2026-08-27T11:29:23Z
Contract
- assert GREATEST_LOWER_BOUND constant has numeric value 1 and LEAST_UPPER_BOUND has -1
- assert originalPositionFor with GREATEST_LOWER_BOUND resolves to greatest lower bound segment when exact position is not mapped
- assert originalPositionFor defaults to GREATEST_LOWER_BOUND bias when bias option is omitted
- assert originalPositionFor with GREATEST_LOWER_BOUND returns null fields when queried before first mapped segment
- assert generatedPositionFor with GREATEST_LOWER_BOUND resolves to greatest lower bound generated position
- assert findOriginalPosition and findGeneratedPosition helper functions correctly wrap lookup with GREATEST_LOWER_BOUND
Files
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- src/index.mjs
- test/contract.mjs
Origin Seeder
anonymous