fix(eve): (server) guarantee session event streams end in a terminal boundary event

[OwenKephart]

Server half of the stream-liveness fix (client half: #919).

A workflow run's durable event log can settle without a session boundary event when the run is terminated outside eve's own code paths — platform-level cancellation, run expiry, or the terminal-failure emitter itself dying. Consumers then can't tell "turn still running" from "run is gone" by transport behavior alone.

• Terminal framing: served event streams now append a synthesized session.failed / session.completed (derived from getRun(id).status) when a settled run's log ends without a boundary event. Implemented as a small TransformStream.flush wrapper (execution/terminal-framing.ts) on both stream-serving paths.
• App function maxDuration: "max": the nitro __server.func that serves GET /eve/v1/session/:id/stream previously ran at the platform default (~300s), so every open stream was severed every ~5 minutes while the flow function ran at "max". Patched post-build, same mechanism as the flow function.

Together with #919 this establishes the stream contract: a settled run's stream always ends in a boundary event; everything else is a transport cut the client reconnects through.

[vercel]

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

Project	Deployment	Actions	Updated (UTC)
eve-docs	Ready	Preview, Comment	Jul 17, 2026 11:11pm
eve-docs-1644	Ready	Preview, Comment, Open in v0	Jul 17, 2026 11:11pm
eve-docs-4759	Ready	Preview, Comment, Open in v0	Jul 17, 2026 11:11pm

[OwenKephart]

• fix(eve): follow durable event streams across connection cuts #919
• fix(eve): (server) guarantee session event streams end in a terminal boundary event #915 👈 (View in Graphite)
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.

[github-actions]

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

Key takeaways

• No notable deltas vs main (c1b6ad3).

Delta vs main (c1b6ad3)

Area	Metric	Baseline	Current	Delta
Package	Packed tarball	3.73 MB	3.73 MB	+585 B ⚠️
Package	Unpacked publish size	13.56 MB	13.56 MB	+3.9 kB ⚠️
Package	Installed footprint	52.67 MB	52.67 MB	+3.9 kB ⚠️
Package	Published files	2650	2652	+2
Package	Installed files	5890	5892	+2
Runtime	Unique function payloads	2	2	0
Runtime	Total function bytes	9.74 MB	9.74 MB	+3.3 kB ⚠️
Runtime	Public routes	10	10	0

Changed function payloads vs main (c1b6ad3) (2)

Function	Status	Baseline	Current	Delta	Route changes
functions/__server.func	changed	3.47 MB	3.47 MB	+2.0 kB ⚠️	none
functions/.well-known/workflow/v1/flow.func	changed	6.27 MB	6.27 MB	+1.3 kB ⚠️	none

eve init install

Metric	Baseline	Current	Delta
Installed footprint	91.07 MB	91.08 MB	+3.9 kB ⚠️
Installed packages	122	122	0
dependencies	4	4	0
devDependencies	2	2	0
Dependency package bytes	27.81 MB	27.81 MB	+3.9 kB ⚠️
devDependency package bytes	5.04 MB	5.04 MB	0 B ➖

Build Metadata

• Preset: vercel
• Nitro: nitro@3.0.260610-beta
• Output directory: apps/fixtures/weather-agent/.vercel/output
• Build metadata timestamp: 2026-07-17T23:12:19.426Z
• Route aliases: 10 public, 1 internal (11 total aliases)
• Vercel routes in config: 11
• Severity legend: 🔴 dominant/large, 🟠 notable, 🟡 watch, ⚪ small

Package Drill-Down

Package Details

• Package: eve@0.25.1
• Package directory: packages/eve
• Tarball: 3.73 MB (eve-0.25.1.tgz)
• Unpacked payload: 13.56 MB across 2652 published files
• Installed footprint: 52.67 MB across 5892 installed files
• Installed root package: 12.29 MB
• Installed dependencies: 40.39 MB
• Runtime dependencies: 1
• Peer dependencies: 5 (4 optional)

Installed footprint is measured from an isolated temporary npm install of the packed tarball.

Heavy installed dependencies

• @rolldown/binding-linux-x64-gnu: 18.96 MB (36.0%)
• eve: 12.29 MB (23.3%)
• ai: 6.39 MB (12.1%)
• zod: 5.04 MB (9.6%)
• nitro: 2.41 MB (4.6%)

Publish payload breakdown

Published file size
🟠 dist/src/compiled/experimental-ai-sdk-code-mo... [####....................] 1.51 MB 11.1%
🟡 dist/src/compiled/@vercel/sandbox/index.js       [#.......................] 622.2 kB 4.6%
🟡 dist/src/compiled/_chunks/workflow/undici-fb5... [#.......................] 502.4 kB 3.7%
🟡 dist/src/compiled/@chat-adapter/slack/index.js   [#.......................] 433.8 kB 3.2%
🟡 dist/src/compiled/_chunks/workflow/dist-CSfKN... [#.......................] 277.8 kB 2.0%
🔴 Other published files                            [########################] 10.22 MB 75.4%

Installed footprint breakdown

Installed package size
🔴 @rolldown/binding-linux-x64-gnu [########################] 18.96 MB 36.0%
🔴 eve                             [################........] 12.29 MB 23.3%
🔴 ai                              [########................] 6.39 MB 12.1%
🔴 zod                             [######..................] 5.04 MB 9.6%
🟠 nitro                           [###.....................] 2.41 MB 4.6%
🟡 @ai-sdk/provider-utils          [#.......................] 847.6 kB 1.6%
🔴 Other installed packages        [#########...............] 6.74 MB 12.8%

Runtime dependencies (1)

Package	Range	Notes
nitro	3.0.260610-beta

Peer dependencies (5)

Package	Range	Notes
@opentelemetry/api	^1.0.0	optional peer
ai	catalog:
braintrust	^3.0.0	optional peer
just-bash	^3.0.0	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: 91.08 MB across 7760 installed files
• Installed packages: 122 total (116 transitive-only)
• dependencies: 4 direct packages totaling 27.81 MB
• devDependencies: 2 direct packages totaling 5.04 MB
• Other transitive package files: 58.23 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 (30.7%)
• @rolldown/binding-linux-x64-gnu: 18.96 MB (20.8%)
• eve: 12.29 MB (13.5%)
• zod: 9.00 MB (9.9%)
• ai: 6.39 MB (7.0%)

Installed footprint breakdown

Installed package size
🔴 @typescript/typescript-linux-x64 [########################] 27.95 MB 30.7%
🔴 @rolldown/binding-linux-x64-gnu  [################........] 18.96 MB 20.8%
🔴 eve                              [###########.............] 12.29 MB 13.5%
🔴 zod                              [########................] 9.00 MB 9.9%
🔴 ai                               [#####...................] 6.39 MB 7.0%
🟠 @types/node                      [##......................] 2.54 MB 2.8%
🔴 Other installed packages         [############............] 13.95 MB 15.3%

dependencies (4)

Package	Range	Installed size	Share
@vercel/connect	0.4.0	135.4 kB	0.1%
ai	^7.0.26	6.39 MB	7.0%
eve	file:eve-0.25.1.tgz	12.29 MB	13.5%
zod	4.4.3	9.00 MB	9.9%

devDependencies (2)

Package	Range	Installed size	Share
@types/node	24.x	2.54 MB	2.8%
typescript	7.0.2	2.50 MB	2.7%

Function Drill-Down

Payload Size Graph

Unique function payload size and share of total
🔴 functions/.well-known/workflow/v1/flow.func     [########################] 6.27 MB 64.4%
🟠 functions/__server.func                         [#############...........] 3.47 MB 35.6%

Top Function Payloads

🟠 functions/.well-known/workflow/v1/flow.func • 1 public route • 6.27 MB

Metric	Value
Public routes	/.well-known/workflow/v1/flow
Runtime	nodejs24.x
Handler	index.mjs
Payload	6.27 MB
Function files	6.27 MB across 37 files
Traced dependencies	0 B
Signal	🟠 Bundled file __eve_nitro_handler__.mjs is 2.20 MB (35.1%)

🟠 🔎 Dependency Analysis

📦 Bundled files:

Bundled file size
🟠 __eve_nitro_handler__.mjs       [########################] 2.20 MB 35.1%
🟡 _chunks/world-vercel.mjs        [#########...............] 826.9 kB 13.2%
🟡 _chunks/sandbox.mjs             [########................] 754.9 kB 12.0%
🟡 _libs/@ai-sdk/gateway+[...].mjs [#####...................] 430.4 kB 6.9%
🟡 _libs/zod.mjs                   [####....................] 376.1 kB 6.0%
🟠 Other bundled files             [##################......] 1.68 MB 26.9%

🧾 Vercel Config

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

---

🟠 functions/__server.func • 9 public routes, 1 internal alias • 3.47 MB

Metric	Value
Public routes	/ /eve/v1/callback/[token] /eve/v1/connections/[name]/callback/[token] /eve/v1/health /eve/v1/info /eve/v1/session /eve/v1/session/[sessionId] /eve/v1/session/[sessionId]/cancel /eve/v1/session/[sessionId]/stream
Internal aliases	/__server
Runtime	nodejs24.x
Handler	index.mjs
Payload	3.47 MB
Function files	3.47 MB across 28 files
Traced dependencies	0 B
Signal	🟠 Bundled file _chunks/runtime-artifacts.mjs is 948.4 kB (27.3%)

🟠 🔎 Dependency Analysis

📦 Bundled files:

Bundled file size
🟠 _chunks/runtime-artifacts.mjs [########################] 948.4 kB 27.3%
🟠 _chunks/world-vercel.mjs      [#####################...] 823.9 kB 23.7%
🟠 _chunks/sandbox.mjs           [###################.....] 754.9 kB 21.8%
🟡 _chunks/dist-CSfKNxQW.mjs     [#########...............] 348.5 kB 10.0%
⚪ _libs/zod.mjs                 [###.....................] 114.2 kB 3.3%
🟡 Other bundled files           [############............] 480.3 kB 13.8%

🧾 Vercel Config

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

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: 2.27 s -> 2.27 s (-3.2 ms) vs main (c1b6ad3).
• Timing is informational: shared GitHub runners are too variable for a hard timing budget.

Detailed phase timings vs `main (c1b6ad3)`

Phase	Baseline	Current	Delta
extension.check	0.9 ms	6.8 ms	+5.9 ms
project.resolve	0.5 ms	1.4 ms	+0.9 ms
workspace.create	0.7 ms	1.2 ms	+0.5 ms
host.prepare	191.8 ms	176.3 ms	-15.5 ms
vercel.service-prefix.resolve	1.8 ms	1.7 ms	-0.1 ms
nitro.app.create	24.1 ms	22.9 ms	-1.2 ms
nitro.app.cache.prepare	0.2 ms	0.2 ms	0.0 ms
nitro.app.prepare	0.7 ms	0.8 ms	+0.1 ms
nitro.app.public-assets	0.7 ms	0.7 ms	0.0 ms
nitro.app.prerender	0.6 ms	0.6 ms	0.0 ms
nitro.app.bundle	584.9 ms	539.7 ms	-45.2 ms
nitro.app.cache.write	0.3 ms	0.3 ms	0.0 ms
vercel.app-function.max-duration	—	0.5 ms	—
sandbox.prewarm	209.6 ms	213.3 ms	+3.7 ms
nitro.flow.create	156.1 ms	186.3 ms	+30.2 ms
nitro.flow.cache.prepare	0.2 ms	0.2 ms	0.0 ms
nitro.flow.prepare	0.8 ms	0.8 ms	0.0 ms
nitro.flow.public-assets	0.2 ms	0.2 ms	0.0 ms
nitro.flow.prerender	0.0 ms	0.0 ms	0.0 ms
nitro.flow.bundle	918.8 ms	875.5 ms	-43.3 ms
nitro.flow.cache.write	0.3 ms	0.3 ms	0.0 ms
nitro.flow.close	0.2 ms	0.2 ms	0.0 ms
workflow.emit	165.7 ms	226.5 ms	+60.8 ms
agent-summary.emit	0.5 ms	0.5 ms	0.0 ms
nitro.app.close	0.1 ms	0.1 ms	0.0 ms
output.publish	3.4 ms	3.3 ms	-0.1 ms
workspace.remove	4.7 ms	4.3 ms	-0.4 ms