[roboeve]

Fixes #4646

Summary

vercel dev loads next.config.* in a child process that runs node --input-type=commonjs -e <loader>. Under -e, Node sets a global __filename of "[eval]". package.ts is ESM, so its typeof __filename === "string" check read that global and called createRequire("[eval]"), which throws ERR_INVALID_ARG_VALUE at module load. Any Next.js app that imports withEve in next.config.* could not start under vercel dev.

resolveCurrentModulePath() now uses __filename only when it is an absolute path. Otherwise it uses the existing stack-trace fallback, which plain ESM loads already use.

Behavior and scope:

• A real module-local __filename (CommonJS, or the bundle banner's fileURLToPath(import.meta.url)) is always absolute, so those paths do not change.
• Piped stdin ("[stdin]") has the same shape and is also fixed.
• Not a recent regression: the check has been in package.ts since Hello Eve #1, and eve@0.70.1 through eve@0.76.3 all fail.

A scenario test runs node -e "import('<dist>/src/public/next/index.js')" and expects the withEve export to load.

Validation

Regression test without the fix (CI test-scenario on 8f291ced7):

FAIL  src/internal/application/package.scenario.test.ts > package module path > loads eve/next under node -e
TypeError [ERR_INVALID_ARG_VALUE]: The argument 'filename' must be a file URL object, file URL string, or absolute path string. Received '[eval]'
Test Files  1 failed | 109 passed (110)

With the fix (b35aa3cc7):

• CI: all 148 checks pass, including test-scenario, test-unit, test-integration (ubuntu and windows), typecheck, and lint.
• Local, after pnpm --filter eve build:
  • pnpm --filter eve exec vitest run --config vitest.scenario.config.ts src/internal/application/package.scenario.test.ts: 1 passed
  • pnpm --filter eve exec vitest run --config vitest.unit.config.ts src/internal/application/package.test.ts: 2 passed
  • pnpm --filter eve exec vitest run --config vitest.integration.config.ts src/internal/application/package.integration.test.ts: 7 passed
• Manual, against the built dist: node -e "import(...)" and node --input-type=commonjs -e "require(...)" both load withEve. With the import piped through stdin, resolvePackageRoot() resolves to the eve package directory.

Checklist

• I added tests and documentation where relevant
• I added a changeset if this touches the published eve package
• DCO sign-off passes for every commit (git commit --signoff)

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated
eve-docs	Ready	Preview, v0	Oct 11, 2026 4:27pm UTC
eve-pkg	Ready	Preview, v0	Oct 11, 2026 4:27pm UTC

[github-actions]

Bundle + Package Summary: apps/fixtures/weather-agent

Key takeaways

• No notable deltas vs main (b6b353f).

Delta vs main (b6b353f)

Area	Metric	Baseline	Current	Delta
Package	Packed tarball	7.58 MB	7.58 MB	+1.9 kB ⚠️
Package	Unpacked publish size	26.70 MB	26.71 MB	+5.7 kB ⚠️
Package	Installed footprint	74.51 MB	74.52 MB	+5.7 kB ⚠️
Package	Published files	4117	4117	0
Package	Installed files	8122	8122	0
Package	Installed package instances	34	34	0
Package	Distinct installed package names	32	32	0
Package	Installed dependency edges	51	51	0
Package	Installed optional peer edges	9	9	0
Runtime	Unique function payloads	2	2	0
Runtime	Total function bytes	20.39 MB	20.39 MB	+270 B ⚠️
Runtime	Public routes	18	18	0

Changed function payloads vs main (b6b353f) (2)

Function	Status	Baseline	Current	Delta	Route changes
functions/__server.func	changed	10.20 MB	10.20 MB	+135 B ⚠️	none
functions/.well-known/workflow/v1/flow.func	changed	10.20 MB	10.20 MB	+135 B ⚠️	none

eve init install

Metric	Baseline	Current	Delta
Installed footprint	112.80 MB	112.81 MB	+5.7 kB ⚠️
Installed packages	97	97	0
dependencies	4	4	0
devDependencies	2	2	0
Dependency package bytes	44.79 MB	44.80 MB	+5.7 kB ⚠️
devDependency package bytes	5.11 MB	5.11 MB	0 B ➖

Build Metadata

• Preset: vercel
• Nitro: nitro@3.0.260903-beta
• Output directory: apps/fixtures/weather-agent/.vercel/output
• Build metadata timestamp: 2026-10-11T16:29:03.888Z
• Route aliases: 18 public, 1 internal (19 total aliases)
• Vercel routes in config: 21
• Severity legend: 🔴 dominant/large, 🟠 notable, 🟡 watch, ⚪ small

Package Drill-Down

Package Details

• Package: eve@0.76.3
• Package directory: packages/eve
• Tarball: 7.58 MB (eve-0.76.3.tgz)
• Unpacked payload: 26.71 MB across 4117 published files
• Installed footprint: 74.52 MB across 8122 installed files
• Installed root package: 26.71 MB
• Installed dependencies: 47.81 MB
• Installed package instances: 34
• Distinct installed package names: 32
• Installed dependency edges: 51
• Installed optional peer edges: 9
• Runtime dependencies: 2
• Peer dependencies: 7 (6 optional)

Installed footprint is measured from an isolated temporary npm install of the packed tarball.
Graph metrics read only package.json files in package directories directly beneath a node_modules boundary, including nested boundaries. Each directory is one package instance; distinct names come from those manifests. Dependency edges count each unique name in dependencies or optionalDependencies per instance; optional peer edges count peerDependencies marked optional.

Heavy installed dependencies

• eve: 26.71 MB (35.8%)
• @rolldown/binding-linux-x64-gnu: 19.62 MB (26.3%)
• ai: 8.14 MB (10.9%)
• zod: 6.15 MB (8.3%)
• undici: 3.56 MB (4.8%)

Publish payload breakdown

Published file size
🟠 dist/src/compiled/shadcn-registry/index.js       [#####...................] 3.85 MB 14.4%
🟠 dist/src/compiled/@photon-ai/chat-adapter-ime... [###.....................] 2.29 MB 8.6%
🟠 dist/src/compiled/@ai-sdk/code-mode/index.js     [#.......................] 1.03 MB 3.8%
🟡 dist/src/compiled/@vercel/blob/index.js          [#.......................] 604.9 kB 2.3%
🟡 dist/src/compiled/_chunks/workflow/undici-D-I... [#.......................] 521.9 kB 2.0%
🔴 Other published files                            [########################] 18.42 MB 69.0%

Installed footprint breakdown

Installed package size
🔴 eve                             [########################] 26.71 MB 35.8%
🔴 @rolldown/binding-linux-x64-gnu [##################......] 19.62 MB 26.3%
🔴 ai                              [#######.................] 8.14 MB 10.9%
🔴 zod                             [######..................] 6.15 MB 8.3%
🟠 undici                          [###.....................] 3.56 MB 4.8%
🟠 nitro                           [##......................] 1.89 MB 2.5%
🔴 Other installed packages        [########................] 8.44 MB 11.3%

Runtime dependencies (2)

Package	Range	Notes
nitro	3.0.260903-beta
undici	8.10.2

Peer dependencies (7)

Package	Range	Notes
@opentelemetry/api	^1.0.0	optional peer
ai	catalog:
braintrust	^3.0.0	optional peer
chat	^4.41.0	optional peer
dd-trace	^6.13.0	optional peer
just-bash	^3.1.0	optional peer
microsandbox	^0.5.0	optional peer

eve init install drill-down

eve init install details

• Command: eve init my-agent
• Package manager: npm
• Installed footprint: 112.81 MB across 10017 installed files
• Installed packages: 97 total (91 transitive-only)
• dependencies: 4 direct packages totaling 44.80 MB
• devDependencies: 2 direct packages totaling 5.11 MB
• Other transitive package files: 62.90 MB

Installed footprint is measured from an isolated temporary eve init my-agent using the current packed eve tarball.

Heavy installed dependencies

• @typescript/typescript-linux-x64: 27.95 MB (24.8%)
• eve: 26.71 MB (23.7%)
• @rolldown/binding-linux-x64-gnu: 19.62 MB (17.4%)
• zod: 9.76 MB (8.6%)
• ai: 8.14 MB (7.2%)

Installed footprint breakdown

Installed package size
🔴 @typescript/typescript-linux-x64 [########################] 27.95 MB 24.8%
🔴 eve                              [#######################.] 26.71 MB 23.7%
🔴 @rolldown/binding-linux-x64-gnu  [#################.......] 19.62 MB 17.4%
🔴 zod                              [########................] 9.76 MB 8.6%
🔴 ai                               [#######.................] 8.14 MB 7.2%
🟠 undici                           [###.....................] 3.56 MB 3.2%
🔴 Other installed packages         [###############.........] 17.07 MB 15.1%

dependencies (4)

Package	Range	Installed size	Share
@vercel/connect	2.2.0	188.7 kB	0.2%
ai	^7.0.128	8.14 MB	7.2%
eve	file:eve-0.76.3.tgz	26.71 MB	23.7%
zod	4.5.4	9.76 MB	8.6%

devDependencies (2)

Package	Range	Installed size	Share
@types/node	24.x	2.61 MB	2.3%
typescript	7.0.2	2.50 MB	2.2%

Function Drill-Down

Payload Size Graph

Unique function payload size and share of total
🔴 functions/.well-known/workflow/v1/flow.func     [########################] 10.20 MB 50.0%
🔴 functions/__server.func                         [########################] 10.20 MB 50.0%

Top Function Payloads

🟠 functions/.well-known/workflow/v1/flow.func • 1 public route • 10.20 MB

Metric	Value
Public routes	/.well-known/workflow/v1/flow
Runtime	nodejs24.x
Handler	index.mjs
Payload	10.20 MB
Function files	10.20 MB across 118 files
Traced dependencies	0 B
Signal	🟠 Bundled file _chunks/vercel.web.mjs is 2.25 MB (22.1%)

🟠 🔎 Dependency Analysis

📦 Bundled files:

Bundled file size
🟠 _chunks/vercel.web.mjs                         [############............] 2.25 MB 22.1%
🟠 _libs/undici.mjs                               [#####...................] 1.01 MB 9.9%
🟡 _chunks/sandbox3.mjs                           [####....................] 815.4 kB 8.0%
🟡 _chunks/compiled-artifacts-instrumentation.mjs [####....................] 757.3 kB 7.4%
🟡 _chunks/token-util-Bla5Z0G9.mjs                [####....................] 704.7 kB 6.9%
🔴 Other bundled files                            [########################] 4.66 MB 45.7%

🧾 Vercel Config

{
  "handler": "index.mjs",
  "launcherType": "Nodejs",
  "shouldAddHelpers": false,
  "supportsResponseStreaming": true,
  "runtime": "nodejs24.x",
  "maxDuration": "max",
  "experimentalTriggers": [
    {
      "type": "queue/v2beta",
      "topic": "__eve776561746865722d6167656e74_wkf_workflow_*",
      "consumer": "default",
      "retryAfterSeconds": 5,
      "initialDelaySeconds": 0
    }
  ],
  "environment": {
    "WORKFLOW_PRECONDITION_GUARD": "1"
  }
}

---

🟠 functions/__server.func • 17 public routes, 1 internal alias • 10.20 MB

Metric	Value
Public routes	/ /.well-known/workflow/v1/webhook/[token] /eve/v1/callback/[token] /eve/v1/connections/[name]/callback/[attemptId]/[token] /eve/v1/connections/[name]/callback/[token] /eve/v1/health /eve/v1/info /eve/v1/session /eve/v1/session/[parentSessionId]/subagents/[callId]/[childSessionId]/stream /eve/v1/session/[sessionId] /eve/v1/session/[sessionId]/cancel /eve/v1/session/[sessionId]/clear /eve/v1/session/[sessionId]/compact /eve/v1/session/[sessionId]/reset /eve/v1/session/[sessionId]/stream /eve/v1/session/[sessionId]/stubs /eve/v1/task-input/[token]
Internal aliases	/__server
Runtime	nodejs24.x
Handler	index.mjs
Payload	10.20 MB
Function files	10.20 MB across 118 files
Traced dependencies	0 B
Signal	🟠 Bundled file _chunks/vercel.web.mjs is 2.25 MB (22.1%)

🟠 🔎 Dependency Analysis

📦 Bundled files:

Bundled file size
🟠 _chunks/vercel.web.mjs                         [############............] 2.25 MB 22.1%
🟠 _libs/undici.mjs                               [#####...................] 1.01 MB 9.9%
🟡 _chunks/sandbox3.mjs                           [####....................] 815.4 kB 8.0%
🟡 _chunks/compiled-artifacts-instrumentation.mjs [####....................] 757.3 kB 7.4%
🟡 _chunks/token-util-Bla5Z0G9.mjs                [####....................] 704.7 kB 6.9%
🔴 Other bundled files                            [########################] 4.66 MB 45.7%

🧾 Vercel Config

{
  "handler": "index.mjs",
  "launcherType": "Nodejs",
  "shouldAddHelpers": false,
  "supportsResponseStreaming": true,
  "runtime": "nodejs24.x"
}

Build Timing: e2e/fixtures/agent-tools-sandbox

This is an informational timing measurement inside eve build, from preflight through publication. Output-size measurement and profile writing are excluded.

Build mode: deployable Vercel build with sandbox template prewarm included.

• Build pipeline: 2.90 s -> 2.95 s (+56.7 ms) vs main (b6b353f).
• Timing is informational: shared GitHub runners are too variable for a hard timing budget.

Detailed phase timings vs `main (b6b353f)`

Phase	Baseline	Current	Delta
extension.check	0.4 ms	15.4 ms	+15.0 ms
project.resolve	0.3 ms	0.3 ms	0.0 ms
workspace.create	0.4 ms	0.4 ms	0.0 ms
host.prepare	635.6 ms	594.1 ms	-41.5 ms
vercel.service-prefix.resolve	1.2 ms	1.4 ms	+0.2 ms
nitro.create	515.9 ms	482.4 ms	-33.5 ms
sandbox.prewarm	312.3 ms	349.7 ms	+37.4 ms
nitro.cache.prepare	0.2 ms	0.2 ms	0.0 ms
nitro.prepare	0.5 ms	0.5 ms	0.0 ms
nitro.public-assets	0.7 ms	0.6 ms	-0.1 ms
nitro.prerender	0.4 ms	0.5 ms	+0.1 ms
nitro.bundle	1.30 s	1.36 s	+65.6 ms
nitro.cache.write	0.3 ms	0.2 ms	-0.1 ms
vercel.workflow-function.materialize	69.7 ms	67.3 ms	-2.4 ms
agent-summary.emit	0.5 ms	0.5 ms	0.0 ms
connect-manifest.emit	0.2 ms	0.3 ms	+0.1 ms
nitro.close	0.1 ms	0.1 ms	0.0 ms
output.publish	2.9 ms	2.9 ms	0.0 ms
workspace.remove	2.1 ms	2.0 ms	-0.1 ms

[AndrewBarba]

The scenario test fails on pre-fix code with the intended ERR_INVALID_ARG_VALUE for '[eval]' and passes with the fix. The fix uses __filename only when it is an absolute path and otherwise uses the existing stack fallback. It is minimal, at the owner boundary, and includes a patch changeset.

[roboeve]

Auto-merge is blocked by test-integration (windows-latest). It has failed twice on fff5e93, each time in a different Windows-only timing test, and none of them touch package.ts:

• Attempt 1: entry-handoff-lifetime (the deadline was off by 1 ms) and entry.integration (two events arrived in a different order)
• Attempt 2: tool-stubs/execution (step.started outside a turn). The two attempt-1 tests passed this time.

Every other check passed, including test-integration (ubuntu-latest) and test-scenario with the new regression test. I already re-ran it once, so I'm not retrying again. If Windows integration is required for merge, a maintainer re-run should clear it: https://github.com/vercel/eve/actions/runs/38155400138