Runtime evidence / smoke tested

express5.3.0

Observed 2026-10-12 22:55 UTC · Linux amd64 / glibc

Classified 2026-10-12 22:55 UTC · classifier_v3

Download JSON

Version summary · Observation 0 · Report history · Maintainer tools (coming soon)

Passed

All applicable planned loading observations completed.

This is loading evidence. It does not establish functional correctness or package safety.

Runtime matrix

4 pinned runtimes · production_2db44d825b68aeb5839111e38b0ad23c

Loading outcomes by runtime and consumer mode
Runtime	Root import	Root require	Subpath imports	Subpath requires
Node.js24.21.0	Passed	Passed	Not applicable0 passed · 0 failed	Not applicable0 passed · 0 failed
Node.js26.10.0	Passed	Passed	Not applicable0 passed · 0 failed	Not applicable0 passed · 0 failed
Bun1.4.2	Passed	Passed	Not applicable0 passed · 0 failed	Not applicable0 passed · 0 failed
Deno2.9.7	Passed	Passed	Not applicable0 passed · 0 failed	Not applicable0 passed · 0 failed

Node.js 24.21.0

Root importPassed

Root requirePassed

Subpath importsNot applicable0 passed · 0 failed

Subpath requiresNot applicable0 passed · 0 failed

Node.js 26.10.0

Root importPassed

Root requirePassed

Subpath importsNot applicable0 passed · 0 failed

Subpath requiresNot applicable0 passed · 0 failed

Bun 1.4.2

Root importPassed

Root requirePassed

Subpath importsNot applicable0 passed · 0 failed

Subpath requiresNot applicable0 passed · 0 failed

Deno 2.9.7

Root importPassed

Root requirePassed

Subpath importsNot applicable0 passed · 0 failed

Subpath requiresNot applicable0 passed · 0 failed

Import uses ESM; require uses CommonJS. Root modes use fresh sandboxes. Subpath batches share module caches and globals. Select a result to inspect its evidence.

Does express work in Node.js, Bun and Deno?

All applicable planned loading checks completed. The runtimes used the same installed dependency snapshot. Test environment: Linux amd64 / glibc, with install scripts and execution networking disabled. Successful import or require does not prove that package functions, native features or your application work.

Does express work with Node.js?

express@5.3.0 passed the applicable loading checks in Node.js 24.21.0. 2 passed · 0 failed.

express@5.3.0 passed the applicable loading checks in Node.js 26.10.0. 2 passed · 0 failed.

Does express work with Bun?

express@5.3.0 passed the applicable loading checks in Bun 1.4.2. 2 passed · 0 failed.

Does express work with Deno?

express@5.3.0 passed the applicable loading checks in Deno 2.9.7. 2 passed · 0 failed.

Compare npm package compatibility across Node.js, Bun and Deno · Browse observed runtime loading failures

Shared preparation

Passed

65 installed packages · 0 optional dependencies omitted · lifecycle scripts disabled

The omitted count covers locked optional dependencies. Optional peers are separate and are not automatically installed.

Static manifest, native and script observations

Static indicators are context; their presence alone does not establish a prerequisite or failure.

{
  "native": {
    "count": 0,
    "paths": [],
    "buildIndicators": [],
    "prerequisiteProven": false
  },
  "declared": {
    "engines": {
      "node": ">= 18"
    },
    "scripts": {
      "lint": "eslint .",
      "test": "mocha --require test/support/env --reporter spec --check-leaks test/ test/acceptance/",
      "test-ci": "nyc --exclude examples --exclude test --exclude benchmarks --reporter=lcovonly --reporter=text npm test",
      "lint:fix": "eslint . --fix",
      "test-cov": "nyc --exclude examples --exclude test --exclude benchmarks --reporter=html --reporter=text npm test",
      "test-tap": "mocha --require test/support/env --reporter tap --check-leaks test/ test/acceptance/"
    },
    "dependencies": {
      "qs": "^6.16.0",
      "depd": "^2.0.0",
      "etag": "^1.8.1",
      "once": "^1.4.0",
      "send": "^1.1.0",
      "vary": "^1.1.2",
      "debug": "^4.4.0",
      "fresh": "^2.0.0",
      "cookie": "^0.7.1",
      "router": "^2.2.0",
      "accepts": "^2.0.0",
      "type-is": "^2.1.0",
      "parseurl": "^1.3.3",
      "statuses": "^2.0.1",
      "encodeurl": "^2.0.0",
      "mime-types": "^3.0.0",
      "proxy-addr": "^2.0.8",
      "body-parser": "^2.3.0",
      "escape-html": "^1.0.3",
      "http-errors": "^2.0.0",
      "on-finished": "^2.4.1",
      "content-type": "^2.0.0",
      "finalhandler": "^2.1.0",
      "range-parser": "^1.2.1",
      "serve-static": "^2.2.0",
      "cookie-signature": "^1.2.1",
      "merge-descriptors": "^2.0.0",
      "content-disposition": "^2.0.1"
    },
    "devDependencies": {
      "ejs": "^3.1.10",
      "hbs": "4.3.1",
      "nyc": "^17.1.0",
      "after": "0.8.2",
      "mocha": "^11.7.5",
      "vhost": "~3.0.2",
      "eslint": "8.47.0",
      "marked": "^15.0.3",
      "morgan": "1.12.1",
      "supertest": "^6.3.0",
      "connect-redis": "^8.0.1",
      "cookie-parser": "1.4.7",
      "cookie-session": "2.1.1",
      "express-session": "^1.18.1",
      "method-override": "3.0.0",
      "pbkdf2-password": "1.2.1"
    }
  },
  "platform": {
    "os": true,
    "cpu": true,
    "libc": true
  },
  "evidenceLevel": "static_only",
  "lifecycleScripts": []
}

Coverage and evidence

Node.js 24.21.0 · Root · ESM importPassed

1 passed · 0 failed · 1 observed of 1 planned

Evidence JSON

Node.js 24.21.0 · Root · CommonJS requirePassed

1 passed · 0 failed · 1 observed of 1 planned

Evidence JSON

Node.js 24.21.0 · Subpaths · ESM importNot applicable

0 passed · 0 failed · 0 observed of 0 planned

Evidence JSON

Node.js 24.21.0 · Subpaths · CommonJS requireNot applicable

0 passed · 0 failed · 0 observed of 0 planned

Evidence JSON

Node.js 26.10.0 · Root · ESM importPassed

1 passed · 0 failed · 1 observed of 1 planned

Evidence JSON

Node.js 26.10.0 · Root · CommonJS requirePassed

1 passed · 0 failed · 1 observed of 1 planned

Evidence JSON

Node.js 26.10.0 · Subpaths · ESM importNot applicable

0 passed · 0 failed · 0 observed of 0 planned

Evidence JSON

Node.js 26.10.0 · Subpaths · CommonJS requireNot applicable

0 passed · 0 failed · 0 observed of 0 planned

Evidence JSON

Bun 1.4.2 · Root · ESM importPassed

1 passed · 0 failed · 1 observed of 1 planned

Evidence JSON

Bun 1.4.2 · Root · CommonJS requirePassed

1 passed · 0 failed · 1 observed of 1 planned

Evidence JSON

Bun 1.4.2 · Subpaths · ESM importNot applicable

0 passed · 0 failed · 0 observed of 0 planned

Evidence JSON

Bun 1.4.2 · Subpaths · CommonJS requireNot applicable

0 passed · 0 failed · 0 observed of 0 planned

Evidence JSON

Deno 2.9.7 · Root · ESM importPassed

1 passed · 0 failed · 1 observed of 1 planned

Evidence JSON

Deno 2.9.7 · Root · CommonJS requirePassed

1 passed · 0 failed · 1 observed of 1 planned

Evidence JSON

Deno 2.9.7 · Subpaths · ESM importNot applicable

0 passed · 0 failed · 0 observed of 0 planned

Evidence JSON

Deno 2.9.7 · Subpaths · CommonJS requireNot applicable

0 passed · 0 failed · 0 observed of 0 planned

Evidence JSON

Planner omissions

pattern: 0
non executable: 0
not exported: 0
invalid subpath: 0
coverage limit: 0

Reproduce these inputs

Download the recorded inputs and exact dependency lock. These files do not include the CLI, runtime images or installed packages.

Reproduction inputs Exact package lock

Local replay requires setup. The CLI currently runs from the CompatLab source repository on a qualified Linux amd64/runsc host. Hosted runtime images are not yet distributed for public download; an operator must supply the exact images named in this report. A fresh image build does not substitute for them. CLI setup and replay requirements

Command for a configured host

Run from the built CompatLab repository with both downloads in that directory and the exact runtime images loaded. Rebuilding creates a new snapshot generation.

sudo "$(command -v node)" apps/cli/dist/bin.js reproduce ./9a5615c8-ec6c-4b1f-8817-d5febb04890c-reproduction.json --rebuild --lockfile ./package-lock.json --json

The original worker last reported its sealed snapshot as available. Verified reuse requires those actual bytes in your local state directory.

Exact provenance

artifact: express@5.3.0
integrity: sha512-qCqy1xSoaugxOD4IVHb1ZWdkvCF2W3aE2okKouWj8VwJ+ztskSiXoBnCSJqfKT+cVPJhuJqe9YLbY425+Zh00g==
tarball: https://registry.npmjs.org/express/-/express-5.3.0.tgz
snapshot: b9c2130e-9708-48da-9f1b-97697f9e6155
generation: 48618c60-d1e9-4469-b4d8-ae0014b13cec
lockDigest: cb9036b55b12736f412e2c1741b269434ae21b856724619ad80af3285e96b7d7
treeDigest: b730b4bea70d400fa5de829242a1c80583d724cd4a9b58deeaa41616f26b5d11
installerImage: node:24.21.0-bookworm-slim@sha256:5cbc7caba8c2c0f0bca675d1b61b9f2857e1cf1853c6164ee9dd409501a936e7
preparationProfile: npm_11_19_0_linux_amd64_v2
harness: load_v2
planner: explicit_exports_v1
policy: runtime_limits_v2
classifier: classifier_v3
classifiedAt: 2026-10-12T22:55:56.429Z

node_24_21_0

sha256:12a6a4db05cc9f4f55fe7e4731983c5476658c748b722cac3332c4bfc986c2f1

Built 2026-10-04 15:20 UTC · runtime_image_v1

node_26_10_0

sha256:8cef3b37b8edb5af9da80cb7416bd2c8b35b87fea1bc72c9abbb204ee000bd9c

Built 2026-10-04 15:20 UTC · runtime_image_v1

bun_1_4_2

sha256:6d19a3cc65d5015ba20193b7610af27ad603eed4ea29caf4dd4ccc04ad5ca7ef

Built 2026-10-04 15:21 UTC · runtime_image_v1

deno_2_9_7

sha256:1a5c5f412e04bff71a674b122f4216fac988b0fddc9d36be588224490adc292e

Built 2026-10-04 15:21 UTC · runtime_image_v1

Evidence limitations

Only installation and loading were observed; functional correctness and package safety are not established.
Subpath batches share module caches and globals; root modes use separate fresh sandboxes.
Package-visible harness observations can be tampered with. They are not adversarial attestation.
Evidence applies to these exact artifacts, dependency snapshot, runtime images and Linux amd64/glibc policy.
Runtime error codes are captured observations and can also be thrown by package code.