feat(eve): add task_send for blocked and finished background tasks by ruiconti · Pull Request #1522 · vercel/eve

ruiconti · 2026-08-01T20:31:02Z

Part 5/5 of the experimental.tasks stack, on top of #1521. Without this, a background child that parks on input is unreachable and a finished conversation can't be continued.

Routing by task status

working → AGENT_BUSY tool error. No queueing: matches handle-continuation semantics, and queueing on the task run is the reversible follow-up if busy errors prove noisy.
input_required + inputResponses → delivered to the parked child session with the task run's token as the caller reply target, so the child's next settled turn reports to the same task. The task returns to working.
terminal + message → the full delegated continuation from part 4, through the agent handle: new task on the same child session, new receipt back. The old task stays terminal.

Ownership is checked against the eve.tasks index; the child address comes from the agent handle. Input responses are local-only — remote children can't forward input requests in the first place, so a remote input_required never exists in this stack.

One seam worth review

task_send's own result is a tool-result, and the resolve path only settles handles from subagent-result outcomes — so the follow-up continuation parks its handle in-line instead of riding the receipt.

The task-control executors split into execution/tasks/{delegate,control-shared,send} (file-length cap, and it breaks an import cycle between the dispatch router and the send path). Includes the release changeset for the feature.

Part of #1084.

vercel · 2026-08-01T20:31:11Z

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Project	Deployment	Actions	Updated (UTC)
eve-docs	Ready	Preview	Aug 7, 2026 3:37am
eve-docs-4759	Ready	Preview, v0	Aug 7, 2026 3:37am

github-actions · 2026-08-01T20:34:48Z

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

Key takeaways

No notable deltas vs tasks/04-delegated (eae4028).

Delta vs `tasks/04-delegated (eae4028)`

Area	Metric	Baseline	Current	Delta
Package	Packed tarball	7.68 MB	7.69 MB	+5.7 kB ⚠️
Package	Unpacked publish size	28.74 MB	28.76 MB	+12.4 kB ⚠️
Package	Installed footprint	72.17 MB	72.18 MB	+12.4 kB ⚠️
Package	Published files	3058	3064	+6
Package	Installed files	6766	6772	+6
Runtime	Unique function payloads	2	2	0
Runtime	Total function bytes	17.10 MB	17.12 MB	+20.0 kB ⚠️
Runtime	Public routes	13	13	0

Changed function payloads vs tasks/04-delegated (eae4028) (2)

Function	Status	Baseline	Current	Delta	Route changes
`functions/__server.func`	changed	8.55 MB	8.56 MB	+10.0 kB ⚠️	none
`functions/.well-known/workflow/v1/flow.func`	changed	8.55 MB	8.56 MB	+10.0 kB ⚠️	none

`eve init` install

Metric	Baseline	Current	Delta
Installed footprint	110.58 MB	110.59 MB	+12.4 kB ⚠️
Installed packages	121	121	0
dependencies	4	4	0
devDependencies	2	2	0
Dependency package bytes	43.22 MB	43.23 MB	+12.4 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: 2026-08-07T03:47:20.798Z
Route aliases: 13 public, 1 internal (14 total aliases)
Vercel routes in config: 16
Severity legend: 🔴 dominant/large, 🟠 notable, 🟡 watch, ⚪ small

Package Drill-Down

Package Details

Package: eve@0.30.7
Package directory: packages/eve
Tarball: 7.69 MB (eve-0.30.7.tgz)
Unpacked payload: 28.76 MB across 3064 published files
Installed footprint: 72.18 MB across 6772 installed files
Installed root package: 27.40 MB
Installed dependencies: 44.78 MB
Runtime dependencies: 2
Peer dependencies: 5 (4 optional)

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

Heavy installed dependencies

eve: 27.40 MB (38.0%)
@rolldown/binding-linux-x64-gnu: 19.35 MB (26.8%)
ai: 6.67 MB (9.2%)
zod: 5.07 MB (7.0%)
undici: 3.50 MB (4.9%)

Publish payload breakdown

Published file size
🔴 dist/src/compiled/shadcn-registry/index.js       [################........] 9.68 MB 33.7%
🟠 dist/src/compiled/@photon-ai/chat-adapter-ime... [####....................] 2.42 MB 8.4%
🟠 dist/src/compiled/experimental-ai-sdk-code-mo... [###.....................] 1.51 MB 5.2%
🟡 dist/src/compiled/_chunks/node/undici-DWL_MYm... [#.......................] 502.4 kB 1.7%
🟡 dist/src/compiled/_chunks/workflow/undici-DWL... [#.......................] 502.4 kB 1.7%
🔴 Other published files                            [########################] 14.14 MB 49.2%

Installed footprint breakdown

Installed package size
🔴 eve                             [########################] 27.40 MB 38.0%
🔴 @rolldown/binding-linux-x64-gnu [#################.......] 19.35 MB 26.8%
🔴 ai                              [######..................] 6.67 MB 9.2%
🔴 zod                             [####....................] 5.07 MB 7.0%
🟠 undici                          [###.....................] 3.50 MB 4.9%
🟠 nitro                           [##......................] 2.41 MB 3.3%
🔴 Other installed packages        [#######.................] 7.79 MB 10.8%

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: 110.59 MB across 8648 installed files
Installed packages: 121 total (115 transitive-only)
dependencies: 4 direct packages totaling 43.23 MB
devDependencies: 2 direct packages totaling 5.04 MB
Other transitive package files: 62.32 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 (25.3%)
eve: 27.40 MB (24.8%)
@rolldown/binding-linux-x64-gnu: 19.35 MB (17.5%)
zod: 9.02 MB (8.2%)
ai: 6.67 MB (6.0%)

Installed footprint breakdown

Installed package size
🔴 @typescript/typescript-linux-x64 [########################] 27.95 MB 25.3%
🔴 eve                              [########################] 27.40 MB 24.8%
🔴 @rolldown/binding-linux-x64-gnu  [#################.......] 19.35 MB 17.5%
🔴 zod                              [########................] 9.02 MB 8.2%
🔴 ai                               [######..................] 6.67 MB 6.0%
🟠 undici                           [###.....................] 3.50 MB 3.2%
🔴 Other installed packages         [##############..........] 16.70 MB 15.1%

dependencies (4)

Package	Range	Installed size	Share
`@vercel/connect`	`0.4.3`	141.0 kB	0.1%
`ai`	`^7.0.38`	6.67 MB	6.0%
`eve`	`file:eve-0.30.7.tgz`	27.40 MB	24.8%
`zod`	`4.4.3`	9.02 MB	8.2%

devDependencies (2)

Package	Range	Installed size	Share
`@types/node`	`24.x`	2.54 MB	2.3%
`typescript`	`7.0.2`	2.50 MB	2.3%

Function Drill-Down

Payload Size Graph

Unique function payload size and share of total
🔴 functions/.well-known/workflow/v1/flow.func     [########################] 8.56 MB 50.0%
🔴 functions/__server.func                         [########################] 8.56 MB 50.0%

Top Function Payloads

🟠 functions/.well-known/workflow/v1/flow.func • 1 public route • 8.56 MB

Metric	Value
Public routes	`/.well-known/workflow/v1/flow`
Runtime	`nodejs24.x`
Handler	`index.mjs`
Payload	8.56 MB
Function files	8.56 MB across 44 files
Traced dependencies	0 B
Signal	🟠 Bundled file `index.mjs` is 2.37 MB (27.7%)

🟠 🔎 Dependency Analysis

📦 Bundled files:

Bundled file size
🟠 index.mjs                       [########################] 2.37 MB 27.7%
🟠 _chunks/runtime-artifacts.mjs   [################........] 1.62 MB 19.0%
🟡 _libs/undici.mjs                [##########..............] 980.5 kB 11.5%
🟡 _chunks/sandbox.mjs             [########................] 769.0 kB 9.0%
🟡 _libs/@ai-sdk/gateway+[...].mjs [####....................] 432.8 kB 5.1%
🟠 Other bundled files             [########################] 2.38 MB 27.8%

🧾 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 • 12 public routes, 1 internal alias • 8.56 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` `/eve/v1/session/clear` `/eve/v1/session/compact` `/eve/v1/session/reset`
Internal aliases	`/__server`
Runtime	`nodejs24.x`
Handler	`index.mjs`
Payload	8.56 MB
Function files	8.56 MB across 44 files
Traced dependencies	0 B
Signal	🟠 Bundled file `index.mjs` is 2.37 MB (27.7%)

🟠 🔎 Dependency Analysis

📦 Bundled files:

Bundled file size
🟠 index.mjs                       [########################] 2.37 MB 27.7%
🟠 _chunks/runtime-artifacts.mjs   [################........] 1.62 MB 19.0%
🟡 _libs/undici.mjs                [##########..............] 980.5 kB 11.5%
🟡 _chunks/sandbox.mjs             [########................] 769.0 kB 9.0%
🟡 _libs/@ai-sdk/gateway+[...].mjs [####....................] 432.8 kB 5.1%
🟠 Other bundled files             [########################] 2.38 MB 27.8%

🧾 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: 2.33 s -> 2.26 s (-77.9 ms) vs tasks/04-delegated (eae4028).
Timing is informational: shared GitHub runners are too variable for a hard timing budget.

Detailed phase timings vs `tasks/04-delegated (eae4028)`

Phase	Baseline	Current	Delta
`extension.check`	9.5 ms	11.8 ms	+2.3 ms
`project.resolve`	3.6 ms	0.8 ms	-2.8 ms
`workspace.create`	1.3 ms	5.2 ms	+3.9 ms
`host.prepare`	243.1 ms	218.4 ms	-24.7 ms
`vercel.service-prefix.resolve`	2.4 ms	2.3 ms	-0.1 ms
`nitro.create`	220.5 ms	233.5 ms	+13.0 ms
`sandbox.prewarm`	352.8 ms	327.7 ms	-25.1 ms
`nitro.cache.prepare`	0.2 ms	0.3 ms	+0.1 ms
`nitro.prepare`	0.9 ms	0.8 ms	-0.1 ms
`nitro.public-assets`	0.8 ms	0.8 ms	0.0 ms
`nitro.prerender`	0.4 ms	0.6 ms	+0.2 ms
`nitro.bundle`	1.47 s	1.42 s	-44.6 ms
`nitro.cache.write`	0.4 ms	0.5 ms	+0.1 ms
`vercel.workflow-function.materialize`	25.0 ms	25.1 ms	+0.1 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`	3.6 ms	3.6 ms	0.0 ms
`workspace.remove`	2.3 ms	2.2 ms	-0.1 ms

task_send completes the parent-side task controls: - an input_required task accepts an inputResponses batch, delivered to the parked child session with the task run as the reply target, and returns to working; - a terminal task accepts a follow-up message, which runs the full delegated continuation through the agent handle: a new task on the same child session, returning the new receipt; - a working task surfaces AGENT_BUSY instead of queueing (settled decision; queueing on the task run is the reversible follow-up). Sends verify ownership through the session task index, and the continued handle is parked directly because task_send's tool-result never flows through the handle-settling resolve path. The task-control executors split into execution/tasks/{delegate,control-shared,send} to keep each file within the length cap. Includes the release changeset for the experimental.tasks feature. Signed-off-by: Rui Conti <ruiconti@gmail.com>

ruiconti · 2026-08-07T06:00:12Z

Superseded by #1773, which introduces only the final message-only task_send and direct HITL contract.

ruiconti mentioned this pull request Aug 1, 2026

feat(eve): add the experimental.tasks flag, plumbing only #1517

Closed

ruiconti force-pushed the tasks/04-delegated branch from a61c317 to c020182 Compare August 1, 2026 22:13

ruiconti force-pushed the tasks/05-send branch from f27d600 to 53d356d Compare August 1, 2026 22:13

vercel Bot deployed to Preview – eve-docs-4759 August 1, 2026 22:14 View deployment

vercel Bot deployed to Preview – eve-docs August 1, 2026 22:15 View deployment

ruiconti force-pushed the tasks/05-send branch from 53d356d to ca88831 Compare August 3, 2026 01:03

vercel Bot deployed to Preview – eve-docs-4759 August 3, 2026 01:04 View deployment

vercel Bot deployed to Preview – eve-docs August 3, 2026 01:05 View deployment

ruiconti mentioned this pull request Aug 3, 2026

fix(eve): render background task turns in the dev TUI #1561

Closed

ruiconti force-pushed the tasks/04-delegated branch from c020182 to ebf9470 Compare August 5, 2026 18:41

ruiconti force-pushed the tasks/05-send branch from ca88831 to 62c2f65 Compare August 5, 2026 18:41

vercel Bot deployed to Preview – eve-docs-4759 August 5, 2026 18:42 View deployment

vercel Bot deployed to Preview – eve-docs August 5, 2026 18:43 View deployment

ruiconti force-pushed the tasks/04-delegated branch from ebf9470 to eae4028 Compare August 7, 2026 03:35

ruiconti force-pushed the tasks/05-send branch from 62c2f65 to 0a6a76c Compare August 7, 2026 03:35

ruiconti mentioned this pull request Aug 7, 2026

feat(eve): carry background-task lifecycle receipts on the wire #1756

Closed

vercel Bot deployed to Preview – eve-docs-4759 August 7, 2026 03:36 View deployment

vercel Bot deployed to Preview – eve-docs August 7, 2026 03:36 View deployment

ruiconti mentioned this pull request Aug 7, 2026

feat(eve): run subagents as durable background tasks #1773

Open

ruiconti closed this Aug 7, 2026

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feat(eve): add task_send for blocked and finished background tasks - #1522

feat(eve): add task_send for blocked and finished background tasks#1522
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tasks/05-send

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Package Details

`eve init` install details

Payload Size Graph

Top Function Payloads

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Routing by task status

One seam worth review

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

Delta vs tasks/04-delegated (eae4028)

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

Delta vs `tasks/04-delegated (eae4028)`

`eve init` install

`eve init` install details

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