feat(eve): compose workspace services in vercel.ts

[OwenKephart]

Summary

When deploying a mixed-framework workspace (e.g. eve agents + next.js), Vercel needs to know every service before any framework build begins.

While we can automatically generate all necessary information for eve-only builds, if users want to have additional frameworks in the mix, we need a solution that does not require one single framework to handle the entire build process, and services config needs to be generated before any framework build begins.

This PR adds a helper for writing a vercel.ts file that composes together auto-generated eve services config / transport routes with additional services / routes of the user's choosing.

Example usage for having eve agents alongside a Next.js app without one "owning" the other:

import { withEve } from "eve/vercel";

export default await withEve({
  services: {
    web: {
      framework: "nextjs",
      root: "apps/web",
    },
  },
  routes: [
    {
      src: "^(.*)$",
      destination: { type: "service", service: "web" },
    },
  ],
});

In this example, we add one additional service (nextjs) and then a catch-all route handler that sends all routes not handled by an earlier agent definition to that app. more complicated setups are of course also possible.

Validation

• pnpm --filter eve exec vitest run --config vitest.integration.config.ts src/internal/vercel/build-agent-workspace.integration.test.ts src/public/vercel/index.integration.test.ts
• pnpm --filter eve typecheck
• pnpm docs:check
• pnpm --filter eve build
• Linked disposable Next.js + native Eve workspace POC: vercel.ts compiled, Next and eve-hello built independently, and vercel build completed successfully

Checklist

• This change was requested or approved by a maintainer
• I ran the relevant checks from CONTRIBUTING.md
• 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	Sep 8, 2026 3:25pm UTC
eve-docs-4759	Ready	Preview, v0	Sep 8, 2026 3:25pm UTC
eve-pkg	Ready	Preview, v0	Sep 8, 2026 3:25pm UTC

[github-actions]

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

Key takeaways

• No notable deltas vs main (9cb899d).

Delta vs main (9cb899d)

Area	Metric	Baseline	Current	Delta
Package	Packed tarball	8.66 MB	8.66 MB	+1.6 kB ⚠️
Package	Unpacked publish size	32.63 MB	32.64 MB	+7.5 kB ⚠️
Package	Installed footprint	77.71 MB	77.72 MB	+7.5 kB ⚠️
Package	Published files	3853	3855	+2
Package	Installed files	7751	7753	+2
Package	Installed package instances	33	33	0
Package	Distinct installed package names	32	32	0
Package	Installed dependency edges	51	51	0
Package	Installed optional peer edges	7	7	0
Runtime	Unique function payloads	2	2	0
Runtime	Total function bytes	20.74 MB	20.74 MB	-80 B ✅
Runtime	Public routes	18	18	0

Changed function payloads vs main (9cb899d) (2)

Function	Status	Baseline	Current	Delta	Route changes
functions/__server.func	changed	10.37 MB	10.37 MB	-40 B ✅	none
functions/.well-known/workflow/v1/flow.func	changed	10.37 MB	10.37 MB	-40 B ✅	none

eve init install

Metric	Baseline	Current	Delta
Installed footprint	116.15 MB	116.16 MB	+7.5 kB ⚠️
Installed packages	113	113	0
dependencies	4	4	0
devDependencies	2	2	0
Dependency package bytes	48.76 MB	48.77 MB	+7.5 kB ⚠️
devDependency package bytes	5.04 MB	5.04 MB	0 B ➖

Build Metadata

• Preset: vercel
• Nitro: nitro@3.0.260903-beta
• Output directory: apps/fixtures/weather-agent/.vercel/output
• Build metadata timestamp: 2026-09-08T15:26:32.311Z
• 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@0.52.2
• Package directory: packages/eve
• Tarball: 8.66 MB (eve-0.52.2.tgz)
• Unpacked payload: 32.64 MB across 3855 published files
• Installed footprint: 77.72 MB across 7753 installed files
• Installed root package: 31.21 MB
• Installed dependencies: 46.51 MB
• Installed package instances: 33
• Distinct installed package names: 32
• Installed dependency edges: 51
• Installed optional peer edges: 7
• Runtime dependencies: 2
• Peer dependencies: 5 (4 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: 31.21 MB (40.2%)
• @rolldown/binding-linux-x64-gnu: 19.31 MB (24.8%)
• ai: 7.01 MB (9.0%)
• zod: 6.41 MB (8.3%)
• undici: 3.51 MB (4.5%)

Publish payload breakdown

Published file size
🔴 dist/src/compiled/shadcn-registry/index.js       [#############...........] 9.76 MB 29.9%
🟠 dist/src/compiled/@photon-ai/chat-adapter-ime... [###.....................] 2.27 MB 7.0%
🟠 dist/src/compiled/@ai-sdk/code-mode/index.js     [#.......................] 1.03 MB 3.1%
🟡 dist/src/compiled/@vercel/blob/index.js          [#.......................] 901.4 kB 2.8%
🟡 dist/src/compiled/_chunks/workflow/signal-exi... [#.......................] 514.6 kB 1.6%
🔴 Other published files                            [########################] 18.17 MB 55.7%

Installed footprint breakdown

Installed package size
🔴 eve                             [########################] 31.21 MB 40.2%
🔴 @rolldown/binding-linux-x64-gnu [###############.........] 19.31 MB 24.8%
🔴 ai                              [#####...................] 7.01 MB 9.0%
🔴 zod                             [#####...................] 6.41 MB 8.3%
🟠 undici                          [###.....................] 3.51 MB 4.5%
🟠 nitro                           [#.......................] 1.89 MB 2.4%
🔴 Other installed packages        [######..................] 8.36 MB 10.8%

Runtime dependencies (2)

Package	Range	Notes
nitro	3.0.260903-beta
undici	8.9.0

Peer dependencies (5)

Package	Range	Notes
@opentelemetry/api	^1.0.0	optional peer
ai	catalog:
braintrust	^3.0.0	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: 116.16 MB across 9649 installed files
• Installed packages: 113 total (107 transitive-only)
• dependencies: 4 direct packages totaling 48.77 MB
• devDependencies: 2 direct packages totaling 5.04 MB
• Other transitive package files: 62.35 MB

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

Heavy installed dependencies

• eve: 31.21 MB (26.9%)
• @typescript/typescript-linux-x64: 27.95 MB (24.1%)
• @rolldown/binding-linux-x64-gnu: 19.31 MB (16.6%)
• zod: 10.37 MB (8.9%)
• ai: 7.01 MB (6.0%)

Installed footprint breakdown

Installed package size
🔴 eve                              [########################] 31.21 MB 26.9%
🔴 @typescript/typescript-linux-x64 [#####################...] 27.95 MB 24.1%
🔴 @rolldown/binding-linux-x64-gnu  [###############.........] 19.31 MB 16.6%
🔴 zod                              [########................] 10.37 MB 8.9%
🔴 ai                               [#####...................] 7.01 MB 6.0%
🟠 undici                           [###.....................] 3.51 MB 3.0%
🔴 Other installed packages         [#############...........] 16.79 MB 14.5%

dependencies (4)

Package	Range	Installed size	Share
@vercel/connect	1.0.0	167.9 kB	0.1%
ai	^7.0.82	7.01 MB	6.0%
eve	file:eve-0.52.2.tgz	31.21 MB	26.9%
zod	4.5.4	10.37 MB	8.9%

devDependencies (2)

Package	Range	Installed size	Share
@types/node	24.x	2.54 MB	2.2%
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     [########################] 10.37 MB 50.0%
🔴 functions/__server.func                         [########################] 10.37 MB 50.0%

Top Function Payloads

🟠 functions/.well-known/workflow/v1/flow.func • 1 public route • 10.37 MB

Metric	Value
Public routes	/.well-known/workflow/v1/flow
Runtime	nodejs24.x
Handler	index.mjs
Payload	10.37 MB
Function files	10.37 MB across 112 files
Traced dependencies	0 B
Signal	🟠 Bundled file index.mjs is 2.32 MB (22.4%)

🟠 🔎 Dependency Analysis

📦 Bundled files:

Bundled file size
🟠 index.mjs                        [###########.............] 2.32 MB 22.4%
🟡 _libs/undici.mjs                 [#####...................] 980.8 kB 9.5%
🟡 _chunks/esm-Fqlolk7e.mjs         [###.....................] 723.3 kB 7.0%
🟡 _chunks/chatgpt-model.mjs        [###.....................] 697.0 kB 6.7%
🟡 _chunks/signal-exit-Dsy-TT0V.mjs [###.....................] 616.2 kB 5.9%
🔴 Other bundled files              [########################] 5.03 MB 48.5%

🧾 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 • 10.37 MB

Metric	Value
Public routes	/ /.well-known/workflow/v1/webhook/[token] /eve/v1/activity/[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/task-input/[token]
Internal aliases	/__server
Runtime	nodejs24.x
Handler	index.mjs
Payload	10.37 MB
Function files	10.37 MB across 112 files
Traced dependencies	0 B
Signal	🟠 Bundled file index.mjs is 2.32 MB (22.4%)

🟠 🔎 Dependency Analysis

📦 Bundled files:

Bundled file size
🟠 index.mjs                        [###########.............] 2.32 MB 22.4%
🟡 _libs/undici.mjs                 [#####...................] 980.8 kB 9.5%
🟡 _chunks/esm-Fqlolk7e.mjs         [###.....................] 723.3 kB 7.0%
🟡 _chunks/chatgpt-model.mjs        [###.....................] 697.0 kB 6.7%
🟡 _chunks/signal-exit-Dsy-TT0V.mjs [###.....................] 616.2 kB 5.9%
🔴 Other bundled files              [########################] 5.03 MB 48.5%

🧾 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: 4.85 s -> 4.76 s (-95.1 ms) vs main (9cb899d).
• Timing is informational: shared GitHub runners are too variable for a hard timing budget.

Detailed phase timings vs `main (9cb899d)`

Phase	Baseline	Current	Delta
extension.check	13.4 ms	17.6 ms	+4.2 ms
project.resolve	0.3 ms	6.1 ms	+5.8 ms
workspace.create	11.8 ms	0.6 ms	-11.2 ms
host.prepare	406.2 ms	420.6 ms	+14.4 ms
vercel.service-prefix.resolve	1.3 ms	1.4 ms	+0.1 ms
nitro.create	421.0 ms	427.1 ms	+6.1 ms
sandbox.prewarm	311.5 ms	264.2 ms	-47.3 ms
nitro.cache.prepare	0.2 ms	0.2 ms	0.0 ms
nitro.prepare	0.6 ms	0.6 ms	0.0 ms
nitro.public-assets	0.6 ms	0.6 ms	0.0 ms
nitro.prerender	0.4 ms	0.4 ms	0.0 ms
nitro.bundle	3.62 s	3.54 s	-79.5 ms
nitro.cache.write	0.3 ms	0.3 ms	0.0 ms
vercel.workflow-function.materialize	48.1 ms	60.3 ms	+12.2 ms
agent-summary.emit	0.6 ms	0.6 ms	0.0 ms
nitro.close	0.1 ms	0.1 ms	0.0 ms
output.publish	12.1 ms	12.3 ms	+0.2 ms
workspace.remove	1.6 ms	1.5 ms	-0.1 ms