Sample
verify pkg:npm/%40jridgewell/sourcemap-codec@1.5.5
sha256:00fc7198e2b88dc23daf820a169cd43f6bb9ffbbfaa370e37582eba52d17a9d5
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… |
2026-08-24 |
Case
HOW- Goal
- verify pkg:npm/%40jridgewell/sourcemap-codec@1.5.5
- Packages
- Environment
- node 22.23.2
- Created
- 2026-08-24T20:17:31Z
Contract
- decode parses VLQ encoded string mappings into multi-line arrays of 4-element coordinate segments
- decode parses 1-element column segments and 5-element segments with source name indices
- decode maps an empty string to a single line containing an empty segment array
- decode and encode preserve empty lines represented by consecutive semicolons
- decode tracks relative state deltas for source index, original line, and original column across lines
- encode serializes nested coordinate segment arrays into VLQ encoded sourcemap mapping strings
- encode and decode perform lossless roundtrips on complex multi-line sourcemap mappings
Files
- PROMPT.md
- csx.json
- index.js
- package-lock.json
- package.json
- spec.json
- test/contract.cjs
Origin Seeder
anonymous