fix(eve): pin durable session turns by chadhietala · Pull Request #2378 · vercel/eve

chadhietala · 2026-08-21T14:51:18Z

Summary

Keep turns for parked sessions on the deployment that owns their durable driver.
Prevent newer deployments from returning state or driver actions an older parked driver cannot decode.
Cover production and local-development dispatch affinity.

Validation

pnpm --filter eve exec vitest run --config vitest.unit.config.ts src/execution/workflow-steps.test.ts
pnpm --filter eve typecheck
pnpm lint

Failure Reproduced

The new production-affinity assertion failed before the implementation change because dispatch added deploymentId: "latest".

Signed-off-by: Chad Hietala <chad.hietala@vercel.com>

vercel · 2026-08-21T14:51:23Z

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Project	Deployment	Actions	Updated (UTC)
eve-docs	Ready	Preview	Aug 21, 2026 2:53pm
eve-docs-4759	Ready	Preview, v0	Aug 21, 2026 2:53pm
eve-pkg	Ready	Preview	Aug 21, 2026 2:53pm

github-actions · 2026-08-21T14:55:35Z

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

Key takeaways

No notable deltas vs main (47e8b64).

Delta vs `main (47e8b64)`

Area	Metric	Baseline	Current	Delta
Package	Packed tarball	8.17 MB	8.17 MB	-182 B ✅
Package	Unpacked publish size	30.76 MB	30.76 MB	-116 B ✅
Package	Installed footprint	74.84 MB	74.84 MB	-116 B ✅
Package	Published files	3402	3402	0
Package	Installed files	7113	7113	0
Package	Installed package instances	35	35	0
Package	Distinct installed package names	34	34	0
Package	Installed dependency edges	53	53	0
Package	Installed optional peer edges	47	47	0
Runtime	Unique function payloads	2	2	0
Runtime	Total function bytes	18.20 MB	18.20 MB	-84 B ✅
Runtime	Public routes	16	16	0

Changed function payloads vs main (47e8b64) (2)

Function	Status	Baseline	Current	Delta	Route changes
`functions/__server.func`	changed	9.10 MB	9.10 MB	-42 B ✅	none
`functions/.well-known/workflow/v1/flow.func`	changed	9.10 MB	9.10 MB	-42 B ✅	none

`eve init` install

Metric	Baseline	Current	Delta
Installed footprint	113.25 MB	113.25 MB	-116 B ✅
Installed packages	121	121	0
dependencies	4	4	0
devDependencies	2	2	0
Dependency package bytes	45.28 MB	45.28 MB	-116 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: 2026-08-21T14:54:35.156Z
Route aliases: 16 public, 1 internal (17 total aliases)
Vercel routes in config: 19
Severity legend: 🔴 dominant/large, 🟠 notable, 🟡 watch, ⚪ small

Package Drill-Down

Package Details

Package: eve@0.43.0
Package directory: packages/eve
Tarball: 8.17 MB (eve-0.43.0.tgz)
Unpacked payload: 30.76 MB across 3402 published files
Installed footprint: 74.84 MB across 7113 installed files
Installed root package: 29.40 MB
Installed dependencies: 45.44 MB
Installed package instances: 35
Distinct installed package names: 34
Installed dependency edges: 53
Installed optional peer edges: 47
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: 29.40 MB (39.3%)
@rolldown/binding-linux-x64-gnu: 19.91 MB (26.6%)
ai: 6.71 MB (9.0%)
zod: 5.07 MB (6.8%)
undici: 3.50 MB (4.7%)

Publish payload breakdown

Published file size
🔴 dist/src/compiled/shadcn-registry/index.js       [###############.........] 9.76 MB 31.7%
🟠 dist/src/compiled/@photon-ai/chat-adapter-ime... [####....................] 2.44 MB 7.9%
🟠 dist/src/compiled/experimental-ai-sdk-code-mo... [##......................] 1.51 MB 4.9%
🟡 dist/src/compiled/_chunks/workflow/undici-Dzn... [#.......................] 512.7 kB 1.7%
🟡 dist/src/compiled/_chunks/node/undici-CUIybhQ... [#.......................] 508.8 kB 1.7%
🔴 Other published files                            [########################] 16.03 MB 52.1%

Installed footprint breakdown

Installed package size
🔴 eve                             [########################] 29.40 MB 39.3%
🔴 @rolldown/binding-linux-x64-gnu [################........] 19.91 MB 26.6%
🔴 ai                              [#####...................] 6.71 MB 9.0%
🔴 zod                             [####....................] 5.07 MB 6.8%
🟠 undici                          [###.....................] 3.50 MB 4.7%
🟠 nitro                           [##......................] 2.41 MB 3.2%
🔴 Other installed packages        [######..................] 7.84 MB 10.5%

Runtime dependencies (2)

Package	Range	Notes
`nitro`	`3.0.260610-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`	`^3.0.0`	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: 113.25 MB across 8989 installed files
Installed packages: 121 total (115 transitive-only)
dependencies: 4 direct packages totaling 45.28 MB
devDependencies: 2 direct packages totaling 5.04 MB
Other transitive package files: 62.93 MB

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

Heavy installed dependencies

eve: 29.40 MB (26.0%)
@typescript/typescript-linux-x64: 27.95 MB (24.7%)
@rolldown/binding-linux-x64-gnu: 19.91 MB (17.6%)
zod: 9.02 MB (8.0%)
ai: 6.71 MB (5.9%)

Installed footprint breakdown

Installed package size
🔴 eve                              [########################] 29.40 MB 26.0%
🔴 @typescript/typescript-linux-x64 [#######################.] 27.95 MB 24.7%
🔴 @rolldown/binding-linux-x64-gnu  [################........] 19.91 MB 17.6%
🔴 zod                              [#######.................] 9.02 MB 8.0%
🔴 ai                               [#####...................] 6.71 MB 5.9%
🟠 undici                           [###.....................] 3.50 MB 3.1%
🔴 Other installed packages         [##############..........] 16.75 MB 14.8%

dependencies (4)

Package	Range	Installed size	Share
`@vercel/connect`	`0.4.3`	141.0 kB	0.1%
`ai`	`^7.0.58`	6.71 MB	5.9%
`eve`	`file:eve-0.43.0.tgz`	29.40 MB	26.0%
`zod`	`4.4.3`	9.02 MB	8.0%

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     [########################] 9.10 MB 50.0%
🔴 functions/__server.func                         [########################] 9.10 MB 50.0%

Top Function Payloads

🟠 functions/.well-known/workflow/v1/flow.func • 1 public route • 9.10 MB

Metric	Value
Public routes	`/.well-known/workflow/v1/flow`
Runtime	`nodejs24.x`
Handler	`index.mjs`
Payload	9.10 MB
Function files	9.10 MB across 50 files
Traced dependencies	0 B
Signal	🟠 Bundled file `index.mjs` is 2.06 MB (22.7%)

🟠 🔎 Dependency Analysis

📦 Bundled files:

Bundled file size
🟠 index.mjs                     [##################......] 2.06 MB 22.7%
🟠 _chunks/runtime-artifacts.mjs [###############.........] 1.80 MB 19.8%
🟡 _libs/undici.mjs              [########................] 980.5 kB 10.8%
🟡 _chunks/sandbox.mjs           [#######.................] 781.9 kB 8.6%
🟡 _chunks/frames-Dl2Hcma4.mjs   [######..................] 678.7 kB 7.5%
🟠 Other bundled files           [########################] 2.80 MB 30.8%

🧾 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 • 15 public routes, 1 internal alias • 9.10 MB

Metric	Value
Public routes	`/` `/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	9.10 MB
Function files	9.10 MB across 50 files
Traced dependencies	0 B
Signal	🟠 Bundled file `index.mjs` is 2.06 MB (22.7%)

🟠 🔎 Dependency Analysis

📦 Bundled files:

Bundled file size
🟠 index.mjs                     [##################......] 2.06 MB 22.7%
🟠 _chunks/runtime-artifacts.mjs [###############.........] 1.80 MB 19.8%
🟡 _libs/undici.mjs              [########................] 980.5 kB 10.8%
🟡 _chunks/sandbox.mjs           [#######.................] 781.9 kB 8.6%
🟡 _chunks/frames-Dl2Hcma4.mjs   [######..................] 678.7 kB 7.5%
🟠 Other bundled files           [########################] 2.80 MB 30.8%

🧾 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: 2.83 s -> 2.34 s (-488.7 ms) vs main (47e8b64).
Timing is informational: shared GitHub runners are too variable for a hard timing budget.

Detailed phase timings vs `main (47e8b64)`

Phase	Baseline	Current	Delta
`extension.check`	12.3 ms	14.3 ms	+2.0 ms
`project.resolve`	0.5 ms	0.5 ms	0.0 ms
`workspace.create`	0.9 ms	0.9 ms	0.0 ms
`host.prepare`	468.1 ms	241.8 ms	-226.3 ms
`vercel.service-prefix.resolve`	2.8 ms	2.6 ms	-0.2 ms
`nitro.create`	307.2 ms	268.8 ms	-38.4 ms
`sandbox.prewarm`	247.8 ms	244.7 ms	-3.1 ms
`nitro.cache.prepare`	0.3 ms	0.3 ms	0.0 ms
`nitro.prepare`	1.0 ms	0.8 ms	-0.2 ms
`nitro.public-assets`	0.8 ms	0.8 ms	0.0 ms
`nitro.prerender`	0.4 ms	0.5 ms	+0.1 ms
`nitro.bundle`	1.74 s	1.52 s	-216.8 ms
`nitro.cache.write`	0.5 ms	0.4 ms	-0.1 ms
`vercel.workflow-function.materialize`	36.0 ms	30.6 ms	-5.4 ms
`agent-summary.emit`	0.8 ms	0.7 ms	-0.1 ms
`nitro.close`	0.2 ms	0.1 ms	-0.1 ms
`output.publish`	4.2 ms	4.5 ms	+0.3 ms
`workspace.remove`	2.8 ms	2.6 ms	-0.2 ms

fix(eve): pin durable session turns

4ca6fe9

Signed-off-by: Chad Hietala <chad.hietala@vercel.com>

vercel Bot deployed to Preview – eve-docs-4759 August 21, 2026 14:51 View deployment

vercel Bot deployed to Preview – eve-docs August 21, 2026 14:53 View deployment

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fix(eve): pin durable session turns - #2378

fix(eve): pin durable session turns#2378
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fix/pin-durable-session-turns

chadhietala commented Aug 21, 2026 •

edited

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

Delta vs main (47e8b64)

eve init install

Package Details

eve init install details

Payload Size Graph

Top Function Payloads

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

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chadhietala commented Aug 21, 2026 •

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

Delta vs `main (47e8b64)`

`eve init` install

`eve init` install details

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