CodeSampleX

Sample

verify find-up.stop in pkg:npm/find-up@5.0.0

sha256:82ce5d1a651a2df9cc2ad040579b08837080a97d3c9b686d770e3c8b25d5aea6

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
1
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 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1		 2026-08-20

Case

HOW
Goal
verify find-up.stop in pkg:npm/find-up@5.0.0
Packages
Symbols
  • find-up.stop
Environment
node 22.23.2
Created
2026-08-20T22:14:37Z

Contract

  1. assert findUp.stop is a unique symbol exported by find-up
  2. assert findUp stops asynchronous directory traversal and resolves to undefined when matcher returns findUp.stop
  3. assert findUp.sync stops synchronous directory traversal and returns undefined when matcher returns findUp.stop
  4. assert returning findUp.stop at initial directory halts search immediately on first invocation
  5. assert createBoundedSyncMatcher halts traversal at boundary marker and returns undefined
  6. assert normal findUp traversal without findUp.stop continues walking up to find target file

Files

  • PROMPT.md
  • csx.json
  • index.js
  • package-lock.json
  • package.json
  • spec.json
  • test/contract.mjs

Download the source artifact (tar.gz)

Origin Seeder

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