fix(run-events): the conversation typed row schema reads payload (cutover consumer fix) by kojiwakayama · Pull Request #4486 · veryfront/veryfront-code

kojiwakayama · 2026-09-12T02:27:36Z

Summary

The Veryfront API now serves every run event row keyed payload on every surface, including the conversation-scoped events route, GraphQL agentRunEvents and the MCP get_agent_run_events tool (veryfront-api #4798, on staging, production next). getConversationTypedRunEventRowSchema still required the pre-cutover event key, so an SDK consumer following the guide rejected every post-cutover row.

Changes

getConversationTypedRunEventRowSchema reads payload as canonical and accepts event as a transitional alias. Exactly one must be present: a row with both parses as payload; a row with neither fails with an issue naming both keys. The event_type agreement check and the event_class check run against the chosen object.
The parsed ConversationTypedRunEventRow exposes the chosen object as payload and, until Phase F removes the alias, as event (marked @deprecated). The export name and type name are unchanged. The "legacy: removed in Phase F" note now says the alias is what Phase F removes.
Unit tests in src/run-events/envelope.test.ts (written red first): payload-only parses, event-only parses, both prefers payload, neither fails naming both keys, the type and class agreement checks fire on the chosen object. The integration contract test covers every fixture sample under both keys.
Docs: the memory-and-streaming guide, the veryfront/run-events barrel JSDoc and the regenerated api-reference say the conversation surfaces serve payload, that format=typed is accepted and ignored (deprecated), that format=raw is refused, and that the event alias goes away in Phase F. No example sends format=typed any more.
CHANGELOG: an Unreleased entry for the deprecation of the event key.

Verification

deno task test:file src/run-events/ and deno task test:file tests/integration/semantic-unit-boundary/src/run-events/: pass.
deno task typecheck, deno task fmt:check, deno lint on touched directories, deno task lint:anti-slop, deno task lint:barrel-jsdoc, deno task lint:test-semantic-dispositions, deno task docs:api-reference:check, deno task docs:public:check: pass.
deno task docs:validate: the guide, coverage, contract and example steps pass. Two steps fail on main independently of this branch: validate-api-reference flags createManagedBrokerHandler in agent.md, and check-doc-links flags create-frontend.md and chat-ui.md. None of those files change here.

https://claude.ai/code/session_016aBfQGf3Eo36c1jtjEKT2N

Summary by CodeRabbit

Changed
- Run event records now use payload as the canonical key across run-event APIs, GraphQL, MCP, and streaming surfaces.
- The previous event key remains temporarily supported as a compatibility alias.
- Run event responses are normalized to expose both payload and the deprecated event alias.
Documentation
- Clarified that format=typed is deprecated and ignored; unsupported values such as format=raw are refused.
- Updated examples and API guidance to omit the format parameter.

…over consumer fix) The Veryfront API now serves every run event row keyed `payload` on every surface, including the conversation-scoped events route, GraphQL `agentRunEvents` and the MCP `get_agent_run_events` tool (veryfront-api #4798). `getConversationTypedRunEventRowSchema` still required the pre-cutover `event` key, so a consumer following the guide rejected every post-cutover row. The schema now reads `payload` as canonical and accepts `event` as a transitional alias: exactly one must be present, a row with both parses as `payload`, and a row with neither fails with an issue naming both keys. The `event_type` agreement and `event_class` checks run against the chosen object. The parsed `ConversationTypedRunEventRow` exposes it as `payload` and, until Phase F removes the alias, as the deprecated `event`. The guide, the barrel JSDoc and the generated api-reference stop instructing readers to send `format=typed`: the API accepts and ignores it and refuses every other value, including `format=raw`. CHANGELOG records the deprecation. Claude-Session: https://claude.ai/code/session_016aBfQGf3Eo36c1jtjEKT2N

kojiwakayama · 2026-09-12T02:27:42Z

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📒 Files selected for processing (5)

CHANGELOG.md
docs/api-reference/veryfront/run-events.md
src/run-events/envelope.test.ts
src/run-events/envelope.ts
src/run-events/index.ts

📝 Walkthrough

Walkthrough

The run event contract now uses payload as the canonical conversation-scoped key. The schema accepts legacy event input, validates the selected payload, and returns both keys. Documentation removes format=typed from examples and describes its deprecated behavior.

Changes

Run event contract

Layer / File(s)	Summary
Payload schema and normalization `src/run-events/envelope.ts`, `src/run-events/envelope.test.ts`, `tests/integration/semantic-unit-boundary/src/run-events/typed-run-event-contract.test.ts`	The conversation-scoped schema accepts exactly one of `payload` or `event`, validates the selected object, and normalizes it under both keys. Tests cover precedence, aliases, missing keys, type checks, and event-class validation.
Surface contract documentation `src/run-events/index.ts`, `src/run-events/vocabulary.ts`, `docs/api-reference/veryfront/run-events.md`, `docs/guides/memory-and-streaming.md`, `CHANGELOG.md`	Documentation describes `payload` as canonical across run event surfaces. It states that `format=typed` is accepted and ignored, while other values such as `format=raw` are refused.

Priority: ⚪ Not assessed

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix

Merge Risk: 🔵 Low · up to c2667

A valid canonical payload can be rejected when a deprecated alias is also present but malformed, and consumers are told not to send dual-key rows that the API accepts. Correct these contract inconsistencies before merge.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the main change: the conversation typed row schema now reads the `payload` key for the run-events cutover. It is specific and concise.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 2 functions across 5 files. (3 skipped: 3 …
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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github-actions · 2026-09-12T02:27:56Z

📦 Client bundle boundary

Entrypoint	Modules	Source size	Server leaks
`src/index.client.ts`	289	2307 KiB	✅ 0

A server module in a client graph aborts hydration in the browser. New leaks fail CI; known leaks are tracked in scripts/lint/client-bundle-baseline.json to burn down.

gitar-bot · 2026-09-12T02:28:11Z

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kwakayama · 2026-09-12T02:29:22Z

Code review: 90/100 — solid, well-tested backward-compatible fix

Focused schema fix for the payload/event cutover on conversation-scoped run event rows, with strong test coverage on both the unit and integration-fixture level.

Strengths

Correct precedence logic: payload canonical, event accepted as a transitional alias, exactly one required, payload wins when both are present — and this is exercised directly in tests (prefers payload when a conversation-scoped row carries both keys).
Rejection path is explicit and helpful: a row with neither key fails with an issue naming both payload and event, rather than a generic "missing field" error.
Type/class agreement checks (event_type, event_class) correctly run against whichever payload was chosen, not hardcoded to one key — covered by the "checks the type agreement against payload when both keys are present" test.
Test coverage is thorough: unit tests in envelope.test.ts cover payload-only, event-only, both-present, neither-present, and agreement-check variants; the integration contract test (typed-run-event-contract.test.ts) exercises every fixture sample under both keys against the real payload catalogue.
Docs (guide, barrel JSDoc, generated api-reference) and CHANGELOG are updated consistently with the code change, and the PR description documents which local verification tasks (tests, typecheck, fmt, lint, docs validation) were run and their results, including two pre-existing unrelated failures on main that are called out rather than hidden.

Minor notes (non-blocking)

The parsed row now always carries the payload twice (once as payload, once as the deprecated event alias) until Phase F — an intentional, documented tradeoff for consumer compatibility, but worth confirming there's no downstream size/serialization concern for high-volume event streams.
The transform step has a defensive throw new Error(...) for the case where the row reaches it with no payload chosen; this is correctly unreachable in practice because superRefine's ctx.addIssue dirties the parse status and Zod skips the subsequent transform, but it's worth a one-line comment noting why it's guaranteed unreachable (it currently just asserts that it should be) so a future refactor doesn't accidentally make it reachable.
Error message text changed from always saying event.type "..." does not match event_type to naming whichever key was chosen (payload.type or event.type); fine for a bug fix, but flag it if any consumer snapshot-tests these exact validation messages.

Given the narrow, well-justified scope, thorough red-then-green test coverage, and complete documentation/changelog updates, this looks ready to merge pending the automated review/CI checks that are still running.

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…lias Codex review: with both keys declared as typed payload objects, a row that carried a valid `payload` next to a stale or malformed `event` alias (such as `event: {}`) failed object validation before the refinement could prefer `payload`, contradicting the contract that `payload` wins whenever both are present. The alias is now declared unknown at the object level and validated as a typed payload only when it is all the row has; its issues are reported under `event`. A canonical `payload` never looks at the alias. Claude-Session: https://claude.ai/code/session_016aBfQGf3Eo36c1jtjEKT2N

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kojiwakayama · 2026-09-12T02:32:18Z

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github-actions · 2026-09-12T02:32:24Z

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Actionable comments posted: 3

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Inline comments:
In `@docs/api-reference/veryfront/run-events.md`:
- Line 105: Update the getConversationTypedRunEventRowSchema documentation to
state “At least one” of payload or event must be present, while preserving that
payload is selected when both exist and rows with neither key are rejected.

In `@src/run-events/envelope.ts`:
- Around line 156-157: Update the documentation for the envelope key requirement
at src/run-events/envelope.ts lines 156-157 and CHANGELOG.md lines 18-19:
replace “exactly one” with wording that requires at least one key, and state
that payload takes precedence when both keys are present.
- Around line 172-173: Update getConversationTypedRunEventRowSchema to validate
only the field selected by pickConversationPayload: use union branches where
typedPayload applies to the selected payload or event field, while the other
field accepts v.unknown().optional(). Add a regression test covering a valid
selected payload alongside an invalid unselected field.

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CHANGELOG.md
docs/api-reference/index.md
docs/api-reference/veryfront/run-events.md
docs/guides/memory-and-streaming.md
src/run-events/envelope.test.ts
src/run-events/envelope.ts
src/run-events/index.ts
src/run-events/vocabulary.ts
tests/integration/semantic-unit-boundary/src/run-events/typed-run-event-contract.test.ts

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Codex and CodeRabbit review: "exactly one" described an XOR contract that a consumer validating rows itself would enforce by rejecting a row carrying both keys, which this schema deliberately accepts with `payload` winning. The JSDoc, the changelog and the generated reference now say at least one. Claude-Session: https://claude.ai/code/session_016aBfQGf3Eo36c1jtjEKT2N

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kojiwakayama · 2026-09-12T02:36:55Z

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Codex Review: Didn't find any major issues. Swish!

Reviewed commit: 0be82fe6c8

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Codex review: `ConversationTypedRunEventRow` now describes the parsed row, so `payload` is required on it and a hand-built row keyed only by `event` no longer type checks under that name. The parsed type stays strict on purpose: readers need `payload` to be reliably present, which is the whole fix. A consumer that builds rows (a fixture, a stub server) gets the new `ConversationTypedRunEventRowInput` for the pre-parse shape instead, and the changelog says so. Claude-Session: https://claude.ai/code/session_016aBfQGf3Eo36c1jtjEKT2N

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kojiwakayama · 2026-09-12T02:46:34Z

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Codecov Report

❌ Patch coverage is 93.87755% with 3 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/run-events/envelope.ts	93.87%	2 Missing and 1 partial ⚠️

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…hema Codex review: normalizing the parsed row means the getter no longer returns an object schema, so the object chainables the Schema interface reserves for object schemas (extend, pick, strict) do not apply to it. The JSDoc says so and points a consumer composing a row schema at the envelope schema, the exported input shape, or the payload-keyed row schema. Claude-Session: https://claude.ai/code/session_016aBfQGf3Eo36c1jtjEKT2N

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Codex review: the exported input type accepted a row with neither key and an alias-only row with a malformed alias, both of which the schema rejects. It is now a union: the canonical branch requires a typed payload and leaves the alias unchecked, the legacy branch requires a typed event. A type-level test pins both rejections with ts-expect-error. Claude-Session: https://claude.ai/code/session_016aBfQGf3Eo36c1jtjEKT2N

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Codex Review: Didn't find any major issues. What shall we delve into next?

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sonarqubecloud · 2026-09-12T03:11:53Z

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
94.2% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

kojiwakayama requested a review from kwakayama as a code owner September 12, 2026 02:27

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kojiwakayama deleted the fix/conversation-row-payload-key branch September 12, 2026 03:38

kojiwakayama mentioned this pull request Sep 16, 2026

release: veryfront 0.1.1259 #4501

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📦 Client bundle boundary

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Code review: 90/100 — solid, well-tested backward-compatible fix

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