feat(eve): support structured output for GitHub turns

[marcoshernanz]

Description

Adds turn-scoped structured output to GitHub channel deliveries.

• Lets GitHubInboundResult return outputSchema for webhook issue, pull-request, and comment turns.
• Lets cross-channel receive(channel, ...) pass the same schema for scheduled or proactive retries.
• Accepts Standard Schema or raw JSON Schema and normalizes it into durable JSON data.
• Scopes schemas to the current conversation turn while preserving runtime continuations and task-mode HITL contracts.
• Documents consuming validated results from the existing result.completed agent hook with trusted session auth.

Sessions remain durable and in conversation mode. This does not add a channel-specific result callback.

Closes #214.

Relationship to #207

#207 modifies cross-channel receive for empty deliveries. This PR touches the same receive path; whichever lands second should rebase and resolve that small overlap without changing either behavior.

How did you test your changes?

• pnpm lint
• pnpm fmt
• pnpm typecheck
• pnpm build
• pnpm test — 3,895 unit tests and 369 integration tests passed
• pnpm test:scenario — 260 passed, 15 platform-specific skips
• pnpm docs:check
• pnpm guard:invariants
• pnpm guard:fixtures
• pnpm check:deps
• pnpm changeset status
• NODE_ENV=test pnpm --filter agent-channels test:e2e — 2 evals and 5 gates passed

Credentialed workspace-wide E2E, model-driven TUI, and Vercel deployment checks could not complete because the required AI Gateway and Vercel credentials are unavailable locally. The relevant channel E2E passed in deterministic mock mode.

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 because this touches the published eve package
• DCO sign-off passes for every commit (git commit --signoff)

[vercel]

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Project	Deployment	Actions	Updated (UTC)
eve-docs	Ready	Preview, Comment, Open in v0	Jun 23, 2026 9:44pm

[github-actions]

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

Key takeaways

• No notable deltas vs main (d602309).

Delta vs main (d602309)

Area	Metric	Baseline	Current	Delta
Package	Packed tarball	3.39 MB	3.39 MB	+831 B ⚠️
Package	Unpacked publish size	12.35 MB	12.36 MB	+4.9 kB ⚠️
Package	Installed footprint	52.56 MB	52.56 MB	+4.9 kB ⚠️
Package	Published files	2280	2280	0
Package	Installed files	5485	5485	0
Runtime	Unique function payloads	2	2	0
Runtime	Total function bytes	9.35 MB	9.35 MB	+716 B ⚠️
Runtime	Public routes	9	9	0

Changed function payloads vs main (d602309) (2)

Function	Status	Baseline	Current	Delta	Route changes
functions/__server.func	changed	3.87 MB	3.87 MB	+566 B ⚠️	none
functions/.well-known/workflow/v1/flow.func	changed	5.48 MB	5.48 MB	+150 B ⚠️	none

Build Metadata

• Preset: vercel
• Nitro: nitro@3.0.260610-beta
• Output directory: apps/fixtures/weather-agent/.vercel/output
• Build metadata timestamp: 2026-06-23T21:44:53.933Z
• 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@0.13.3
• Package directory: packages/eve
• Tarball: 3.39 MB (eve-0.13.3.tgz)
• Unpacked payload: 12.36 MB across 2280 published files
• Installed footprint: 52.56 MB across 5485 installed files
• Installed root package: 11.08 MB
• Installed dependencies: 41.48 MB
• Runtime dependencies: 1
• Peer dependencies: 12 (11 optional)

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

Heavy installed dependencies

• @rolldown/binding-linux-x64-gnu: 20.61 MB (39.2%)
• eve: 11.08 MB (21.1%)
• ai: 6.20 MB (11.8%)
• 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 12.2%
🟡 dist/src/compiled/@workflow/core/runtime.js      [##......................] 775.4 kB 6.3%
🟡 dist/src/compiled/@vercel/sandbox/index.js       [##......................] 632.0 kB 5.1%
🟡 dist/src/compiled/@chat-adapter/slack/index.js   [#.......................] 438.4 kB 3.5%
🟡 dist/src/compiled/_chunks/workflow/attribute-... [#.......................] 370.9 kB 3.0%
🔴 Other published files                            [########################] 8.63 MB 69.9%

Installed footprint breakdown

Installed package size
🔴 @rolldown/binding-linux-x64-gnu [########################] 20.61 MB 39.2%
🔴 eve                             [#############...........] 11.08 MB 21.1%
🔴 ai                              [#######.................] 6.20 MB 11.8%
🔴 zod                             [######..................] 5.04 MB 9.6%
🟠 nitro                           [###.....................] 2.41 MB 4.6%
🟡 rolldown                        [#.......................] 771.0 kB 1.5%
🔴 Other installed packages        [########................] 6.46 MB 12.3%

Runtime dependencies (1)

Package	Range	Notes
nitro	3.0.260610-beta

Peer dependencies (12)

Package	Range	Notes
@opentelemetry/api	^1.0.0	optional peer
@sveltejs/kit	^2.0.0	optional peer
ai	catalog:
braintrust	^3.0.0	optional peer
just-bash	^3.0.0	optional peer
microsandbox	^0.5.0	optional peer
next	^16.0.0	optional peer
nuxt	^4.0.0	optional peer
react	^19.0.0	optional peer
svelte	^5.0.0	optional peer
vite	^8.0.0	optional peer
vue	^3.5.0	optional peer

Function Drill-Down

Payload Size Graph

Unique function payload size and share of total
🔴 functions/.well-known/workflow/v1/flow.func     [########################] 5.48 MB 58.6%
🔴 functions/__server.func                         [#################.......] 3.87 MB 41.4%

Top Function Payloads

🟠 functions/.well-known/workflow/v1/flow.func • 1 public route • 5.48 MB

Metric	Value
Public routes	/.well-known/workflow/v1/flow
Runtime	nodejs24.x
Handler	index.mjs
Payload	5.48 MB
Function files	5.48 MB across 27 files
Traced dependencies	0 B
Signal	🟠 Bundled file __eve_nitro_handler__.mjs is 1.51 MB (27.6%)

🟠 🔎 Dependency Analysis

📦 Bundled files:

Bundled file size
🟠 __eve_nitro_handler__.mjs              [########################] 1.51 MB 27.6%
🟠 _chunks/runtime.mjs                    [###############.........] 958.4 kB 17.5%
🟡 _chunks/sandbox.mjs                    [############............] 766.0 kB 14.0%
🟡 _chunks/attribute-changes-Bi5DLT8S.mjs [########................] 472.2 kB 8.6%
🟡 _chunks/dist-DTchiX0N.mjs              [#######.................] 460.6 kB 8.4%
🟠 Other bundled files                    [#####################...] 1.31 MB 24.0%

🧾 Vercel Config

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

---

🟠 functions/__server.func • 8 public routes, 1 internal alias • 3.87 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	3.87 MB
Function files	3.87 MB across 21 files
Traced dependencies	0 B
Signal	🟠 Bundled file index.mjs is 1.40 MB (36.3%)

🟠 🔎 Dependency Analysis

📦 Bundled files:

Bundled file size
🟠 index.mjs                              [########################] 1.40 MB 36.3%
🟠 _chunks/runtime.mjs                    [###############.........] 875.8 kB 22.6%
🟠 _chunks/sandbox.mjs                    [#############...........] 766.0 kB 19.8%
🟡 _chunks/attribute-changes-Bi5DLT8S.mjs [########................] 448.5 kB 11.6%
⚪ _libs/zod.mjs                          [##......................] 114.2 kB 3.0%
🟡 Other bundled files                    [####....................] 258.8 kB 6.7%

🧾 Vercel Config

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

[marcoshernanz]

Closing this draft in favor of #227, which contains only the generic receive(...) + outputSchema change requested in #224.