chore(api): migrate mailer endpoints to OpenAPI pattern

[vivekyarra]

Migrates mailer legacy endpoints to the chained OpenAPI pattern with proper AJV validation.

Closes #38876

Summary by CodeRabbit

• Chores
  • Migrated mailer API endpoints to OpenAPI pattern standards with improved request parameter validation.
  • Enhanced API response consistency and error handling for mailer endpoints.

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[changeset-bot]

🦋 Changeset detected

Latest commit: c67643d

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 41 packages

Name	Type
@rocket.chat/meteor	Patch
@rocket.chat/rest-typings	Patch
@rocket.chat/api-client	Patch
@rocket.chat/core-services	Patch
@rocket.chat/ddp-client	Patch
@rocket.chat/http-router	Patch
@rocket.chat/models	Patch
@rocket.chat/ui-contexts	Patch
@rocket.chat/web-ui-registration	Patch
@rocket.chat/account-service	Patch
@rocket.chat/authorization-service	Patch
@rocket.chat/ddp-streamer	Patch
@rocket.chat/federation-matrix	Patch
@rocket.chat/omnichannel-services	Patch
@rocket.chat/presence	Patch
rocketchat-services	Patch
@rocket.chat/omnichannel-transcript	Patch
@rocket.chat/presence-service	Patch
@rocket.chat/queue-worker	Patch
@rocket.chat/abac	Patch
@rocket.chat/network-broker	Patch
@rocket.chat/omni-core-ee	Patch
@rocket.chat/livechat	Patch
@rocket.chat/mock-providers	Patch
@rocket.chat/cron	Patch
@rocket.chat/instance-status	Patch
@rocket.chat/omni-core	Patch
@rocket.chat/server-fetch	Patch
@rocket.chat/ui-client	Patch
@rocket.chat/media-calls	Patch
@rocket.chat/uikit-playground	Patch
@rocket.chat/fuselage-ui-kit	Patch
@rocket.chat/gazzodown	Patch
@rocket.chat/ui-avatar	Patch
@rocket.chat/ui-video-conf	Patch
@rocket.chat/ui-voip	Patch
@rocket.chat/core-typings	Patch
@rocket.chat/apps	Patch
@rocket.chat/model-typings	Patch
@rocket.chat/license	Patch
@rocket.chat/pdf-worker	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

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📒 Files selected for processing (2)

• .changeset/migrate-mailer-openapi.md
• apps/meteor/app/api/server/v1/mailer.ts

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Files:

• apps/meteor/app/api/server/v1/mailer.ts

🧠 Learnings (19)

📓 Common learnings

Learnt from: smirk-dev
Repo: RocketChat/Rocket.Chat PR: 39625
File: apps/meteor/app/api/server/v1/push.ts:85-97
Timestamp: 2026-03-14T14:58:58.834Z
Learning: In RocketChat/Rocket.Chat, the `push.token` POST/DELETE endpoints in `apps/meteor/app/api/server/v1/push.ts` were already migrated to the chained router API pattern on `develop` prior to PR `#39625`. `cleanTokenResult` (which strips `authToken` and returns `PushTokenResult`) and `isPushTokenPOSTProps`/`isPushTokenDELETEProps` validators already exist on `develop`. PR `#39625` only migrates `push.get` and `push.info` to the chained pattern. Do not flag `cleanTokenResult` or `PushTokenResult` as newly introduced behavior-breaking changes when reviewing this PR.

Learnt from: ahmed-n-abdeltwab
Repo: RocketChat/Rocket.Chat PR: 38974
File: apps/meteor/app/api/server/v1/im.ts:220-221
Timestamp: 2026-02-24T19:09:09.561Z
Learning: In RocketChat/Rocket.Chat OpenAPI migration PRs for apps/meteor/app/api/server/v1 endpoints, maintainers prefer to avoid any logic changes; style-only cleanups (like removing inline comments) may be deferred to follow-ups to keep scope tight.

Learnt from: amitb0ra
Repo: RocketChat/Rocket.Chat PR: 39676
File: .changeset/migrate-users-register-openapi.md:3-3
Timestamp: 2026-03-16T21:50:42.118Z
Learning: In RocketChat/Rocket.Chat OpenAPI migration PRs, removing endpoint types and validators from `rocket.chat/rest-typings` (e.g., `UserRegisterParamsPOST`, `/v1/users.register` entry) is the *required* migration pattern per RocketChat/Rocket.Chat-Open-API#150 Rule 7 ("No More rest-typings or Manual Typings"). The endpoint type is re-exposed via a module augmentation `.d.ts` file in the consuming package (e.g., `packages/web-ui-registration/src/users-register.d.ts`). This is NOT a breaking change — the correct changeset bump for `rocket.chat/rest-typings` in this scenario is `minor`, not `major`. Do not flag this as a breaking change during OpenAPI migration reviews.

Learnt from: amitb0ra
Repo: RocketChat/Rocket.Chat PR: 39676
File: apps/meteor/app/api/server/v1/users.ts:862-869
Timestamp: 2026-03-16T23:33:15.721Z
Learning: In RocketChat/Rocket.Chat OpenAPI migration PRs (e.g., PR `#39676` for users.register in apps/meteor/app/api/server/v1/users.ts), calls to `this.parseJsonQuery()` inside migrated handlers are intentionally preserved without adding a corresponding `query` AJV schema to the route options. Adding query-param schemas for the `fields`/`sort`/`query` parameters consumed by `parseJsonQuery()` is a separate cross-cutting concern shared by many endpoints (e.g., users.create, users.update, users.list) and is explicitly out of scope for individual endpoint migration PRs. Do not flag the absence of a `query` schema for `parseJsonQuery()` usage as a violation of OpenAPI/AJV contract during migration reviews.

Learnt from: amitb0ra
Repo: RocketChat/Rocket.Chat PR: 39647
File: apps/meteor/app/api/server/v1/users.ts:710-757
Timestamp: 2026-03-15T14:31:28.969Z
Learning: In RocketChat/Rocket.Chat, the `UserCreateParamsPOST` type in `apps/meteor/app/api/server/v1/users.ts` (migrated from `packages/rest-typings/src/v1/users/UserCreateParamsPOST.ts`) intentionally has `fields: string` (non-optional) and `settings?: IUserSettings` without a corresponding AJV schema entry. This is a pre-existing divergence carried over verbatim from the original rest-typings source (PR `#39647`). Do not flag this type/schema misalignment during the OpenAPI migration review — it is tracked as a separate follow-up fix.

Learnt from: ahmed-n-abdeltwab
Repo: RocketChat/Rocket.Chat PR: 39414
File: apps/meteor/app/api/server/v1/rooms.ts:1241-1297
Timestamp: 2026-03-10T08:13:52.153Z
Learning: In the RocketChat/Rocket.Chat OpenAPI migration PRs for endpoints under apps/meteor/app/api/server/v1/rooms.ts, the pattern `ajv.compile<void>({...})` is intentionally used for the 200 response schema even when the endpoint returns `{ success: true }`. This is an established convention across all migrated endpoints (rooms.leave, rooms.favorite, rooms.delete, rooms.muteUser, rooms.unmuteUser). Do not flag this as a type mismatch during reviews of these migration PRs.

Learnt from: ggazzo
Repo: RocketChat/Rocket.Chat PR: 35995
File: apps/meteor/app/api/server/v1/rooms.ts:1107-1112
Timestamp: 2026-02-23T17:53:18.785Z
Learning: In Rocket.Chat PR reviews, maintain strict scope boundaries—when a PR is focused on a specific endpoint (e.g., rooms.favorite), avoid reviewing or suggesting changes to other endpoints that were incidentally refactored (e.g., rooms.invite) unless explicitly requested by maintainers.

Learnt from: ggazzo
Repo: RocketChat/Rocket.Chat PR: 39553
File: apps/meteor/app/api/server/v1/stats.ts:98-117
Timestamp: 2026-03-20T13:52:29.575Z
Learning: In `apps/meteor/app/api/server/v1/stats.ts`, the `statistics.telemetry` POST endpoint intentionally has no `body` AJV schema in its route options. The proper request body shape (a `params` array of telemetry event objects) has not been formally defined yet, so body validation is deferred to a follow-up. Do not flag the missing body schema for this endpoint during OpenAPI migration reviews.

📚 Learning: 2026-02-24T19:09:09.561Z

Learnt from: ahmed-n-abdeltwab
Repo: RocketChat/Rocket.Chat PR: 38974
File: apps/meteor/app/api/server/v1/im.ts:220-221
Timestamp: 2026-02-24T19:09:09.561Z
Learning: In RocketChat/Rocket.Chat OpenAPI migration PRs for apps/meteor/app/api/server/v1 endpoints, maintainers prefer to avoid any logic changes; style-only cleanups (like removing inline comments) may be deferred to follow-ups to keep scope tight.

Applied to files:

• .changeset/migrate-mailer-openapi.md

📚 Learning: 2026-03-16T21:50:37.589Z

Learnt from: amitb0ra
Repo: RocketChat/Rocket.Chat PR: 39676
File: .changeset/migrate-users-register-openapi.md:3-3
Timestamp: 2026-03-16T21:50:37.589Z
Learning: For changes related to OpenAPI migrations in Rocket.Chat/OpenAPI, when removing endpoint types and validators from rocket.chat/rest-typings (e.g., UserRegisterParamsPOST, /v1/users.register) document this as a minor changeset (not breaking) per RocketChat/Rocket.Chat-Open-API#150 Rule 7. Note that the endpoint type is re-exposed via a module augmentation .d.ts in the consuming package (e.g., packages/web-ui-registration/src/users-register.d.ts). In reviews, ensure the changeset clearly states: this is a non-breaking change, the major version should not be bumped, and the changeset reflects a minor version bump. Do not treat this as a breaking change during OpenAPI migrations.

Applied to files:

• .changeset/migrate-mailer-openapi.md

📚 Learning: 2026-03-15T14:31:28.969Z

Learnt from: amitb0ra
Repo: RocketChat/Rocket.Chat PR: 39647
File: apps/meteor/app/api/server/v1/users.ts:710-757
Timestamp: 2026-03-15T14:31:28.969Z
Learning: In RocketChat/Rocket.Chat, the `UserCreateParamsPOST` type in `apps/meteor/app/api/server/v1/users.ts` (migrated from `packages/rest-typings/src/v1/users/UserCreateParamsPOST.ts`) intentionally has `fields: string` (non-optional) and `settings?: IUserSettings` without a corresponding AJV schema entry. This is a pre-existing divergence carried over verbatim from the original rest-typings source (PR `#39647`). Do not flag this type/schema misalignment during the OpenAPI migration review — it is tracked as a separate follow-up fix.

Applied to files:

• .changeset/migrate-mailer-openapi.md
• apps/meteor/app/api/server/v1/mailer.ts

📚 Learning: 2026-03-16T23:33:15.721Z

Learnt from: amitb0ra
Repo: RocketChat/Rocket.Chat PR: 39676
File: apps/meteor/app/api/server/v1/users.ts:862-869
Timestamp: 2026-03-16T23:33:15.721Z
Learning: In RocketChat/Rocket.Chat OpenAPI migration PRs (e.g., PR `#39676` for users.register in apps/meteor/app/api/server/v1/users.ts), calls to `this.parseJsonQuery()` inside migrated handlers are intentionally preserved without adding a corresponding `query` AJV schema to the route options. Adding query-param schemas for the `fields`/`sort`/`query` parameters consumed by `parseJsonQuery()` is a separate cross-cutting concern shared by many endpoints (e.g., users.create, users.update, users.list) and is explicitly out of scope for individual endpoint migration PRs. Do not flag the absence of a `query` schema for `parseJsonQuery()` usage as a violation of OpenAPI/AJV contract during migration reviews.

Applied to files:

• .changeset/migrate-mailer-openapi.md
• apps/meteor/app/api/server/v1/mailer.ts

📚 Learning: 2026-03-14T14:58:58.834Z

Learnt from: smirk-dev
Repo: RocketChat/Rocket.Chat PR: 39625
File: apps/meteor/app/api/server/v1/push.ts:85-97
Timestamp: 2026-03-14T14:58:58.834Z
Learning: In RocketChat/Rocket.Chat, the `push.token` POST/DELETE endpoints in `apps/meteor/app/api/server/v1/push.ts` were already migrated to the chained router API pattern on `develop` prior to PR `#39625`. `cleanTokenResult` (which strips `authToken` and returns `PushTokenResult`) and `isPushTokenPOSTProps`/`isPushTokenDELETEProps` validators already exist on `develop`. PR `#39625` only migrates `push.get` and `push.info` to the chained pattern. Do not flag `cleanTokenResult` or `PushTokenResult` as newly introduced behavior-breaking changes when reviewing this PR.

Applied to files:

• .changeset/migrate-mailer-openapi.md
• apps/meteor/app/api/server/v1/mailer.ts

📚 Learning: 2026-03-10T08:13:52.153Z

Learnt from: ahmed-n-abdeltwab
Repo: RocketChat/Rocket.Chat PR: 39414
File: apps/meteor/app/api/server/v1/rooms.ts:1241-1297
Timestamp: 2026-03-10T08:13:52.153Z
Learning: In the RocketChat/Rocket.Chat OpenAPI migration PRs for endpoints under apps/meteor/app/api/server/v1/rooms.ts, the pattern `ajv.compile<void>({...})` is intentionally used for the 200 response schema even when the endpoint returns `{ success: true }`. This is an established convention across all migrated endpoints (rooms.leave, rooms.favorite, rooms.delete, rooms.muteUser, rooms.unmuteUser). Do not flag this as a type mismatch during reviews of these migration PRs.

Applied to files:

• .changeset/migrate-mailer-openapi.md
• apps/meteor/app/api/server/v1/mailer.ts

📚 Learning: 2026-03-03T11:11:48.541Z

Learnt from: ahmed-n-abdeltwab
Repo: RocketChat/Rocket.Chat PR: 39230
File: apps/meteor/app/api/server/v1/chat.ts:214-222
Timestamp: 2026-03-03T11:11:48.541Z
Learning: In apps/meteor/server/lib/moderation/reportMessage.ts, the reportMessage function validates that description is not empty or whitespace-only with `if (!description.trim())`. When migrating the chat.reportMessage endpoint to OpenAPI, adding minLength validation to the schema preserves this existing behavior.

Applied to files:

• .changeset/migrate-mailer-openapi.md

📚 Learning: 2026-02-24T19:05:56.710Z

Learnt from: ahmed-n-abdeltwab
Repo: RocketChat/Rocket.Chat PR: 0
File: :0-0
Timestamp: 2026-02-24T19:05:56.710Z
Learning: Rocket.Chat repo context: When a workspace manifest on develop already pins a dependency version (e.g., packages/web-ui-registration → "rocket.chat/ui-contexts": "27.0.1"), a lockfile change in a feature PR that upgrades only that dependency’s resolution is considered a manifest-driven sync and can be kept, preferably as a small "chore: sync yarn.lock with manifests" commit.

Applied to files:

• .changeset/migrate-mailer-openapi.md

📚 Learning: 2026-02-25T20:10:16.987Z

Learnt from: ahmed-n-abdeltwab
Repo: RocketChat/Rocket.Chat PR: 38913
File: packages/ddp-client/src/legacy/types/SDKLegacy.ts:34-34
Timestamp: 2026-02-25T20:10:16.987Z
Learning: In the RocketChat/Rocket.Chat monorepo, packages/ddp-client and apps/meteor do not use TypeScript project references. Module augmentations in apps/meteor (e.g., declare module 'rocket.chat/rest-typings') are not visible when compiling packages/ddp-client in isolation, which is why legacy SDK methods that depend on OperationResult types for OpenAPI-migrated endpoints must remain commented out.

Applied to files:

• .changeset/migrate-mailer-openapi.md
• apps/meteor/app/api/server/v1/mailer.ts

📚 Learning: 2026-03-20T13:52:29.575Z

Learnt from: ggazzo
Repo: RocketChat/Rocket.Chat PR: 39553
File: apps/meteor/app/api/server/v1/stats.ts:98-117
Timestamp: 2026-03-20T13:52:29.575Z
Learning: In `apps/meteor/app/api/server/v1/stats.ts`, the `statistics.telemetry` POST endpoint intentionally has no `body` AJV schema in its route options. The proper request body shape (a `params` array of telemetry event objects) has not been formally defined yet, so body validation is deferred to a follow-up. Do not flag the missing body schema for this endpoint during OpenAPI migration reviews.

Applied to files:

• .changeset/migrate-mailer-openapi.md
• apps/meteor/app/api/server/v1/mailer.ts

📚 Learning: 2026-02-24T19:05:56.710Z

Learnt from: ahmed-n-abdeltwab
Repo: RocketChat/Rocket.Chat PR: 0
File: :0-0
Timestamp: 2026-02-24T19:05:56.710Z
Learning: In Rocket.Chat PRs, keep feature PRs free of unrelated lockfile-only dependency bumps; prefer reverting lockfile drift or isolating such bumps into a separate "chore" commit/PR, and always use yarn install --immutable with the Yarn version pinned in package.json via Corepack.

Applied to files:

• .changeset/migrate-mailer-openapi.md

📚 Learning: 2026-03-16T21:50:42.118Z

Learnt from: amitb0ra
Repo: RocketChat/Rocket.Chat PR: 39676
File: .changeset/migrate-users-register-openapi.md:3-3
Timestamp: 2026-03-16T21:50:42.118Z
Learning: In RocketChat/Rocket.Chat OpenAPI migration PRs, removing endpoint types and validators from `rocket.chat/rest-typings` (e.g., `UserRegisterParamsPOST`, `/v1/users.register` entry) is the *required* migration pattern per RocketChat/Rocket.Chat-Open-API#150 Rule 7 ("No More rest-typings or Manual Typings"). The endpoint type is re-exposed via a module augmentation `.d.ts` file in the consuming package (e.g., `packages/web-ui-registration/src/users-register.d.ts`). This is NOT a breaking change — the correct changeset bump for `rocket.chat/rest-typings` in this scenario is `minor`, not `major`. Do not flag this as a breaking change during OpenAPI migration reviews.

Applied to files:

• apps/meteor/app/api/server/v1/mailer.ts

📚 Learning: 2026-02-24T19:09:01.522Z

Learnt from: ahmed-n-abdeltwab
Repo: RocketChat/Rocket.Chat PR: 38974
File: apps/meteor/app/api/server/v1/im.ts:220-221
Timestamp: 2026-02-24T19:09:01.522Z
Learning: In Rocket.Chat OpenAPI migration PRs for endpoints under apps/meteor/app/api/server/v1, avoid introducing logic changes. Only perform scope-tight changes that preserve behavior; style-only cleanups (e.g., removing inline comments) may be deferred to follow-ups to keep the migration PR focused.

Applied to files:

• apps/meteor/app/api/server/v1/mailer.ts

📚 Learning: 2026-03-12T10:26:26.697Z

Learnt from: ahmed-n-abdeltwab
Repo: RocketChat/Rocket.Chat PR: 39340
File: apps/meteor/app/api/server/v1/im.ts:1349-1398
Timestamp: 2026-03-12T10:26:26.697Z
Learning: In `apps/meteor/app/api/server/v1/im.ts` (PR `#39340`), the `DmEndpoints` type intentionally includes temporary stub entries for `/v1/im.kick`, `/v1/dm.kick`, `/v1/im.leave`, and `/v1/dm.leave` (using `DmKickProps` and `DmLeaveProps`) even though no route handlers exist for them yet. These stubs were added to preserve type compatibility after removing the original `DmLeaveProps` and related files. They are planned for cleanup in a follow-up PR. Do not flag these as missing implementations when reviewing this file until the follow-up is merged.

Applied to files:

• apps/meteor/app/api/server/v1/mailer.ts

📚 Learning: 2026-01-26T18:26:01.279Z

Learnt from: d-gubert
Repo: RocketChat/Rocket.Chat PR: 38227
File: apps/meteor/app/api/server/router.ts:44-49
Timestamp: 2026-01-26T18:26:01.279Z
Learning: In apps/meteor/app/api/server/router.ts, when retrieving bodyParams and queryParams from the Hono context via c.get(), do not add defensive defaults (e.g., ?? {}). The code should fail fast if these parameters are missing, as endpoint handlers expect them to be present and breaking here helps surface parsing problems rather than hiding them.

Applied to files:

• apps/meteor/app/api/server/v1/mailer.ts

📚 Learning: 2026-02-23T17:53:06.802Z

Learnt from: ggazzo
Repo: RocketChat/Rocket.Chat PR: 35995
File: apps/meteor/app/api/server/v1/rooms.ts:1107-1112
Timestamp: 2026-02-23T17:53:06.802Z
Learning: During PR reviews that touch endpoint files under apps/meteor/app/api/server/v1, enforce strict scope: if a PR targets a specific endpoint (e.g., rooms.favorite), do not propose changes to unrelated endpoints (e.g., rooms.invite) unless maintainers explicitly request them. Focus feedback on the touched endpoint's behavior, API surface, and related tests; avoid broad cross-endpoint changes in the same PR unless requested.

Applied to files:

• apps/meteor/app/api/server/v1/mailer.ts

📚 Learning: 2026-02-26T19:25:44.063Z

Learnt from: gabriellsh
Repo: RocketChat/Rocket.Chat PR: 38778
File: packages/ui-voip/src/providers/useMediaSession.ts:192-192
Timestamp: 2026-02-26T19:25:44.063Z
Learning: In the Rocket.Chat repository, do not reference Biome lint rules in code review feedback. Biome is not used even if biome.json exists; only reference Biome rules if there is explicit, project-wide usage documented. For TypeScript files, review lint implications without Biome guidance unless the project enables Biome rules.

Applied to files:

• apps/meteor/app/api/server/v1/mailer.ts

📚 Learning: 2026-02-26T19:25:44.063Z

Learnt from: gabriellsh
Repo: RocketChat/Rocket.Chat PR: 38778
File: packages/ui-voip/src/providers/useMediaSession.ts:192-192
Timestamp: 2026-02-26T19:25:44.063Z
Learning: In this repository (RocketChat/Rocket.Chat), Biome lint rules are not used even if a biome.json exists. When reviewing TypeScript files (e.g., packages/ui-voip/src/providers/useMediaSession.ts), ensure lint suggestions do not reference Biome-specific rules. Rely on general ESLint/TypeScript lint rules and project conventions instead.

Applied to files:

• apps/meteor/app/api/server/v1/mailer.ts

🔇 Additional comments (5)

apps/meteor/app/api/server/v1/mailer.ts (4)

1-12: LGTM!

Imports are correctly structured, bringing in AJV utilities and validators from @rocket.chat/rest-typings along with the local mailer utilities and API infrastructure.

---

14-39: LGTM!

The mailer endpoint migration follows the established OpenAPI pattern correctly:

• Body validation via isMailerProps AJV schema
• Proper response schema definitions for 200/400/401
• sendMail() returns Promise<void>, so returning API.v1.success() without arguments is correct

---

40-64: LGTM!

The mailer.unsubscribe endpoint migration is well-structured:

• Strict rate limiting (1 request/minute) appropriately protects against abuse
• Body validation via isMailerUnsubscribeProps
• Consistent response schema pattern with the mailer endpoint

---

66-71: LGTM!

Type export and module augmentation follow the required OpenAPI migration pattern per Rule 7. The ExtractRoutesFromAPI correctly extracts both chained POST endpoints, and the declaration merging extends Endpoints with the server-side types.

.changeset/migrate-mailer-openapi.md (1)

1-6: LGTM!

Changeset correctly designates patch for both packages. This is appropriate since the migration:

• Preserves existing behavior
• Doesn't introduce breaking changes
• Only refactors internal implementation to the OpenAPI pattern

Based on learnings, OpenAPI migrations that don't remove public types warrant patch or minor bumps, not major.

---

Walkthrough

Refactored mailer API endpoints from legacy API.v1.addRoute() pattern to the new chained .post() pattern with AJV validation schemas. Added explicit response validation for success (200) and error (400/401) responses. Introduced ServerMailerEndpoints type and extended the @rocket.chat/rest-typings module interface via declaration merging.

Changes

Cohort / File(s)	Summary
Changeset .changeset/migrate-mailer-openapi.md	New changeset marking patch-level release documenting migration of mailer endpoints to OpenAPI pattern with AJV validation.
Mailer Endpoints Migration apps/meteor/app/api/server/v1/mailer.ts	Refactored two POST endpoints using chained API pattern; replaced validateParams with body schema validation; added explicit 200/400/401 response validation via AJV; removed return value handling from sendMail call; exported ServerMailerEndpoints type and extended @rocket.chat/rest-typings module interface.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~22 minutes

Suggested labels

type: chore

🚥 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 PR title clearly and concisely describes the main change: migrating mailer endpoints to the OpenAPI pattern, which is the primary objective of this changeset.
Linked Issues check	✅ Passed	The PR fully implements the requirements from issue #38876: converts the mailer endpoints from legacy API.v1.addRoute pattern to the chained OpenAPI pattern with AJV-based validation and typed response schemas.
Out of Scope Changes check	✅ Passed	All changes are directly aligned with migrating mailer endpoints to the OpenAPI pattern; no out-of-scope modifications detected beyond the stated objective.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

---

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_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[cubic-dev-ai]

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