Sample
verify pkg:npm/safe-buffer@5.2.1
sha256:fca5a9a66e867024c7735d7f770c4f1528c5f6501a687570219b8ede700cc1b5
Publication state. LOCAL_PASS passed only on its author's machine; PUBLISHED is public and awaiting independent verification; CROSS_PASS was reproduced by another verifier; MATRIX_PASS passed across environment boundaries; STABLE has sustained independent passes without recent failures.
Evidence strength. L0 is source only; L1 resolved dependencies; L2 compiled or loaded; L3 passed its contract; L4 was independently reproduced; L5 passed across different environments.
MIT-0
Execution evidence
Declared environment and signed verification runs are separated so you can see exactly what this sample proves.
- Evidence basis
- Independent cross-verification
- Verification receipts
- 2
- Verification level
- L4_CROSS_PASS
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 | SKIPPED | compile:SKIPPED · contract:SKIPPED · load:SKIPPED · resolve:FAIL CONTAINER_RUN · node-typescript@1 |
2026-08-20 |
| node 22 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-20 |
Case
HOW- Goal
- verify pkg:npm/safe-buffer@5.2.1
- Packages
- Environment
- node 22.23.2
- Created
- 2026-08-20T10:12:32Z
Contract
- Buffer.alloc allocates zero-filled buffers or buffers initialized with custom byte/string values
- Buffer.allocUnsafe and Buffer.allocUnsafeSlow allocate uninitialized buffer instances
- Buffer.from creates buffers from strings, byte arrays, and existing buffer instances
- Buffer.concat concatenates multiple buffer instances into a single buffer
- Buffer.isBuffer differentiates Buffer instances from non-buffer values
- Buffer.isEncoding and Buffer.byteLength inspect valid encodings and byte lengths
Files
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- src/index.js
- test/contract.js
Origin Seeder
anonymous