fix(eve): follow durable event streams across connection cuts

[OwenKephart]

Description

Keep durable event streams attached across transient connection cuts. The client resumes from its last cursor after clean or errored disconnects, without replaying events, and preserves interrupted sessions for later reattachment.

Stream retry policy is now internal rather than exposed as the low-level maxReconnectAttempts option. send() still stops at the current turn boundary, while session.stream() retains its existing caller-controlled behavior.

The TUI distinguishes connection loss from a user interrupt and warns when interrupted server-side work may still be running.

How did you test your changes?

• Unit tests for client session state and TUI recovery
• Real-socket integration tests for clean closes, abrupt disconnects, and stalled streams
• pnpm --filter eve typecheck
• pnpm lint
• pnpm guard:invariants
• pnpm docs:check

PR Checklist

• I linked an issue with prior discussion confirming this change is wanted
• 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 (UTC)
eve-docs	Ready	Preview, Comment, Open in v0	Jul 19, 2026 4:59am
eve-docs-1644	Ready	Preview, Comment, Open in v0	Jul 19, 2026 4:59am
eve-docs-4759	Ready	Preview, Comment, Open in v0	Jul 19, 2026 4:59am

[OwenKephart]

• fix(eve): maximize deployed app stream duration #936
• fix(eve): follow durable event streams across connection cuts #919 👈 (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 (47521fe).

Delta vs main (47521fe)

Area	Metric	Baseline	Current	Delta
Package	Packed tarball	3.73 MB	3.73 MB	+318 B ⚠️
Package	Unpacked publish size	13.56 MB	13.56 MB	+433 B ⚠️
Package	Installed footprint	52.67 MB	52.67 MB	+433 B ⚠️
Package	Published files	2650	2650	0
Package	Installed files	5890	5890	0
Runtime	Unique function payloads	2	2	0
Runtime	Total function bytes	9.74 MB	9.74 MB	-40 B ✅
Runtime	Public routes	10	10	0

Changed function payloads vs main (47521fe) (2)

Function	Status	Baseline	Current	Delta	Route changes
functions/__server.func	changed	3.47 MB	3.47 MB	-20 B ✅	none
functions/.well-known/workflow/v1/flow.func	changed	6.27 MB	6.27 MB	-20 B ✅	none

eve init install

Metric	Baseline	Current	Delta
Installed footprint	91.08 MB	91.08 MB	+433 B ⚠️
Installed packages	122	122	0
dependencies	4	4	0
devDependencies	2	2	0
Dependency package bytes	27.81 MB	27.81 MB	+433 B ⚠️
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: 2026-07-19T05:00:22.054Z
• 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@0.25.2
• Package directory: packages/eve
• Tarball: 3.73 MB (eve-0.25.2.tgz)
• Unpacked payload: 13.56 MB across 2650 published files
• Installed footprint: 52.67 MB across 5890 installed files
• Installed root package: 12.28 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: 12.28 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                             [################........] 12.28 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 7758 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: 12.28 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                              [###########.............] 12.28 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-0.25.2.tgz	12.28 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 948.2 kB (27.3%)

🟠 🔎 Dependency Analysis

📦 Bundled files:

Bundled file size
🟠 _chunks/runtime-artifacts.mjs [########################] 948.2 kB 27.3%
🟠 _chunks/world-vercel.mjs      [#####################...] 823.9 kB 23.8%
🟠 _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           [############............] 479.0 kB 13.8%

🧾 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: 2.57 s -> 2.05 s (-519.3 ms) vs main (47521fe).
• Timing is informational: shared GitHub runners are too variable for a hard timing budget.

Detailed phase timings vs `main (47521fe)`

Phase	Baseline	Current	Delta
extension.check	0.8 ms	0.9 ms	+0.1 ms
project.resolve	0.5 ms	0.5 ms	0.0 ms
workspace.create	0.6 ms	0.7 ms	+0.1 ms
host.prepare	183.2 ms	186.8 ms	+3.6 ms
vercel.service-prefix.resolve	1.3 ms	1.3 ms	0.0 ms
nitro.app.create	18.4 ms	17.5 ms	-0.9 ms
nitro.app.cache.prepare	0.2 ms	0.2 ms	0.0 ms
nitro.app.prepare	0.6 ms	0.6 ms	0.0 ms
nitro.app.public-assets	0.6 ms	0.6 ms	0.0 ms
nitro.app.prerender	0.4 ms	0.3 ms	-0.1 ms
nitro.app.bundle	486.4 ms	468.9 ms	-17.5 ms
nitro.app.cache.write	0.3 ms	0.2 ms	-0.1 ms
sandbox.prewarm	231.7 ms	276.0 ms	+44.3 ms
nitro.flow.create	126.9 ms	129.5 ms	+2.6 ms
nitro.flow.cache.prepare	0.2 ms	0.2 ms	0.0 ms
nitro.flow.prepare	0.6 ms	0.7 ms	+0.1 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	792.6 ms	811.7 ms	+19.1 ms
nitro.flow.cache.write	0.2 ms	0.3 ms	+0.1 ms
nitro.flow.close	0.2 ms	0.2 ms	0.0 ms
workflow.emit	715.0 ms	134.2 ms	-580.8 ms
agent-summary.emit	0.5 ms	0.4 ms	-0.1 ms
nitro.app.close	0.0 ms	0.0 ms	0.0 ms
output.publish	4.1 ms	14.4 ms	+10.3 ms
workspace.remove	4.0 ms	3.9 ms	-0.1 ms