CodeSampleX

Sample

verify pkg:npm/%40tailwindcss/postcss@4.3.3

sha256:c9c6f9979c031bab3a01131575a80e08bbd7ce0a98fd31a82ff1f9f46dc5d2ff

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

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 pkg:npm/%40tailwindcss/postcss@4.3.3
Packages
Environment
node 22.23.2
Created
2026-08-20T17:16:06Z

Contract

  1. tailwindcss() initializes PostCSS plugin with postcssPlugin metadata property set to '@tailwindcss/postcss'
  2. postcss with @tailwindcss/postcss processes @import 'tailwindcss' and generates core utility CSS for matched candidate classes
  3. postcss with @tailwindcss/postcss compiles custom utilities registered via CSS-first @utility directive when candidates are present
  4. postcss with @tailwindcss/postcss compiles custom variants registered via @variant directive and applies them to candidate utility classes
  5. postcss with @tailwindcss/postcss extends theme tokens with CSS-first @theme directive and emits corresponding theme utility classes
  6. postcss with @tailwindcss/postcss base option restricts candidate file scanning to configured directory
  7. postcss with @tailwindcss/postcss optimize option produces minified CSS when true compared to false

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous