feat(eve): message received - project attachment parts

[AndrewBarba]

Summary

Implements an internal fix for #286, using #481 as reference without merging the external branch directly. message.received now keeps the existing flattened data.message summary and adds structured data.parts for text plus attachment metadata, so clients can render user attachments without parsing placeholder text.

The default message reducer projects confirmed attachments as file message parts, and the web chat / framework sample UIs render those file parts. Raw bytes and internal sandbox paths stay off the stream; url is included only for client-resolvable http(s) and data: URLs.

Co-authored implementation credit: Nicolas Molina n_m09@hotmail.com.

Validation

• pnpm --filter eve exec vitest run --config vitest.unit.config.ts src/protocol/message.test.ts src/client/message-reducer.test.ts test/dev-send-message.test.ts
• pnpm --filter eve run check:web-template
• pnpm fmt
• pnpm lint (completed with existing warnings in apps/docs/scripts/render-eve-5.ts)
• pnpm typecheck
• pnpm docs:check

Notes

The exact focused-test command from the plan used repo-root paths under pnpm --filter eve exec, which runs from packages/eve; I reran the same files with package-relative paths. E2E was not run locally, per plan.

Fixes #286.
References #481.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
eve-docs	Ready	Preview, Comment, Open in v0	Jul 7, 2026 3:45pm

2 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
eve-docs-1644	Skipped	Open in v0	Jul 7, 2026 3:45pm
eve-docs-4759	Skipped	Open in v0	Jul 7, 2026 3:45pm

[github-actions]

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

Key takeaways

• No notable deltas vs main (d408d0b).

Delta vs main (d408d0b)

Area	Metric	Baseline	Current	Delta
Package	Packed tarball	3.53 MB	3.54 MB	+3.1 kB ⚠️
Package	Unpacked publish size	12.84 MB	12.85 MB	+10.1 kB ⚠️
Package	Installed footprint	51.93 MB	51.94 MB	+10.1 kB ⚠️
Package	Published files	2449	2449	0
Package	Installed files	5676	5676	0
Runtime	Unique function payloads	2	2	0
Runtime	Total function bytes	9.26 MB	9.27 MB	+12.8 kB ⚠️
Runtime	Public routes	9	9	0

Changed function payloads vs main (d408d0b) (2)

Function	Status	Baseline	Current	Delta	Route changes
functions/.well-known/workflow/v1/flow.func	changed	5.78 MB	5.79 MB	+12.9 kB ⚠️	none
functions/__server.func	changed	3.48 MB	3.48 MB	-144 B ✅	none

eve init install

Metric	Baseline	Current	Delta
Installed footprint	91.71 MB	91.72 MB	+10.1 kB ⚠️
Installed packages	120	120	0
dependencies	4	4	0
devDependencies	2	2	0
Dependency package bytes	27.00 MB	27.01 MB	+10.1 kB ⚠️
devDependency package bytes	4.81 MB	4.81 MB	0 B ➖

Build Metadata

• Preset: vercel
• Nitro: nitro@3.0.260610-beta
• Output directory: apps/fixtures/weather-agent/.vercel/output
• Build metadata timestamp: 2026-07-07T15:45:27.452Z
• Route aliases: 9 public, 1 internal (10 total aliases)
• Vercel routes in config: 10
• Severity legend: 🔴 dominant/large, 🟠 notable, 🟡 watch, ⚪ small

Package Drill-Down

Package Details

• Package: eve@0.20.0
• Package directory: packages/eve
• Tarball: 3.54 MB (eve-0.20.0.tgz)
• Unpacked payload: 12.85 MB across 2449 published files
• Installed footprint: 51.94 MB across 5676 installed files
• Installed root package: 11.57 MB
• Installed dependencies: 40.36 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: 19.18 MB (36.9%)
• eve: 11.57 MB (22.3%)
• ai: 6.34 MB (12.2%)
• zod: 5.04 MB (9.7%)
• nitro: 2.41 MB (4.6%)

Publish payload breakdown

Published file size
🟠 dist/src/compiled/experimental-ai-sdk-code-mo... [####....................] 1.51 MB 11.7%
🟡 dist/src/compiled/@workflow/core/runtime.js      [##......................] 794.4 kB 6.2%
🟡 dist/src/compiled/@vercel/sandbox/index.js       [##......................] 632.2 kB 4.9%
🟡 dist/src/compiled/@chat-adapter/slack/index.js   [#.......................] 433.8 kB 3.4%
🟡 dist/src/compiled/_chunks/workflow/attribute-... [#.......................] 371.6 kB 2.9%
🔴 Other published files                            [########################] 9.11 MB 70.9%

Installed footprint breakdown

Installed package size
🔴 @rolldown/binding-linux-x64-gnu [########################] 19.18 MB 36.9%
🔴 eve                             [##############..........] 11.57 MB 22.3%
🔴 ai                              [########................] 6.34 MB 12.2%
🔴 zod                             [######..................] 5.04 MB 9.7%
🟠 nitro                           [###.....................] 2.41 MB 4.6%
🟡 rolldown                        [#.......................] 771.7 kB 1.5%
🔴 Other installed packages        [########................] 6.63 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: 91.72 MB across 7428 installed files
• Installed packages: 120 total (114 transitive-only)
• dependencies: 4 direct packages totaling 27.01 MB
• devDependencies: 2 direct packages totaling 4.81 MB
• Other transitive package files: 59.90 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: 29.69 MB (32.4%)
• @rolldown/binding-linux-x64-gnu: 19.18 MB (20.9%)
• eve: 11.57 MB (12.6%)
• zod: 9.00 MB (9.8%)
• ai: 6.34 MB (6.9%)

Installed footprint breakdown

Installed package size
🔴 @typescript/typescript-linux-x64 [########################] 29.69 MB 32.4%
🔴 @rolldown/binding-linux-x64-gnu  [###############.........] 19.18 MB 20.9%
🔴 eve                              [#########...............] 11.57 MB 12.6%
🔴 zod                              [#######.................] 9.00 MB 9.8%
🔴 ai                               [#####...................] 6.34 MB 6.9%
🟠 @types/node                      [##......................] 2.54 MB 2.8%
🔴 Other installed packages         [###########.............] 13.40 MB 14.6%

dependencies (4)

Package	Range	Installed size	Share
@vercel/connect	0.2.2	98.6 kB	0.1%
ai	^7.0.0	6.34 MB	6.9%
eve	file:eve-0.20.0.tgz	11.57 MB	12.6%
zod	4.4.3	9.00 MB	9.8%

devDependencies (2)

Package	Range	Installed size	Share
@types/node	24.x	2.54 MB	2.8%
typescript	7.0.1-rc	2.27 MB	2.5%

Function Drill-Down

Payload Size Graph

Unique function payload size and share of total
🔴 functions/.well-known/workflow/v1/flow.func     [########################] 5.79 MB 62.4%
🟠 functions/__server.func                         [##############..........] 3.48 MB 37.6%

Top Function Payloads

🟠 functions/.well-known/workflow/v1/flow.func • 1 public route • 5.79 MB

Metric	Value
Public routes	/.well-known/workflow/v1/flow
Runtime	nodejs24.x
Handler	index.mjs
Payload	5.79 MB
Function files	5.79 MB across 26 files
Traced dependencies	0 B
Signal	🟠 Bundled file __eve_nitro_handler__.mjs is 2.02 MB (34.8%)

🟠 🔎 Dependency Analysis

📦 Bundled files:

Bundled file size
🟠 __eve_nitro_handler__.mjs              [########################] 2.02 MB 34.8%
🟠 _chunks/runtime.mjs                    [############............] 983.9 kB 17.0%
🟡 _chunks/sandbox.mjs                    [#########...............] 766.3 kB 13.2%
🟡 _chunks/attribute-changes-zAifvEhb.mjs [######..................] 473.4 kB 8.2%
🟡 _libs/@ai-sdk/gateway+[...].mjs        [#####...................] 413.5 kB 7.1%
🟠 Other bundled files                    [##############..........] 1.14 MB 19.6%

🧾 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 • 8 public routes, 1 internal alias • 3.48 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]/stream
Internal aliases	/__server
Runtime	nodejs24.x
Handler	index.mjs
Payload	3.48 MB
Function files	3.48 MB across 21 files
Traced dependencies	0 B
Signal	🟠 Bundled file _chunks/dev-runtime-artifacts.mjs is 916.4 kB (26.3%)

🟠 🔎 Dependency Analysis

📦 Bundled files:

Bundled file size
🟠 _chunks/dev-runtime-artifacts.mjs      [########################] 916.4 kB 26.3%
🟠 _chunks/runtime.mjs                    [#######################.] 891.6 kB 25.6%
🟠 _chunks/sandbox.mjs                    [####################....] 766.3 kB 22.0%
🟡 _chunks/attribute-changes-zAifvEhb.mjs [############............] 449.0 kB 12.9%
⚪ _libs/zod.mjs                          [###.....................] 114.2 kB 3.3%
🟡 Other bundled files                    [#########...............] 343.9 kB 9.9%

🧾 Vercel Config

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