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: Harxhit
Repo: RocketChat/Rocket.Chat PR: 39476
File: apps/meteor/server/methods/addAllUserToRoom.ts:0-0
Timestamp: 2026-03-09T18:39:21.178Z
Learning: In apps/meteor/server/methods/addAllUserToRoom.ts, the implementation uses a single cursor pass (Users.find(userFilter).batchSize(100)) that collects both the full user objects (collectedUsers: IUser[]) and their usernames (usernames: string[]) in one iteration. `beforeAddUserToRoom` is then called once with the full usernames batch (preserving batch-validation semantics), and the subsequent subscription/message processing loop iterates over the same stable `collectedUsers` array — no second DB query is made. This avoids any race condition between validation and processing while preserving the original batch-validation behavior.

Learnt from: dougfabris
Repo: RocketChat/Rocket.Chat PR: 39425
File: apps/meteor/client/lib/chats/flows/processMessageUploads.ts:112-119
Timestamp: 2026-03-11T18:17:47.912Z
Learning: In `apps/meteor/client/lib/chats/flows/processMessageUploads.ts`, when sending multiple file uploads, each file is confirmed via its own `/rooms.mediaConfirm/${rid}/${fileId}` call and produces a separate message. Only the first file's confirm payload carries the composed message text (`msg`); all subsequent files receive `msg: ''`. This one-message-per-file behavior is intentional by design — do not flag it as a bug or suggest batching into a single message.

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.

Learnt from: juliajforesti
Repo: RocketChat/Rocket.Chat PR: 38493
File: apps/meteor/tests/e2e/page-objects/fragments/home-content.ts:60-82
Timestamp: 2026-02-24T19:36:55.089Z
Learning: In RocketChat/Rocket.Chat e2e tests (apps/meteor/tests/e2e/page-objects/fragments/home-content.ts), thread message preview listitems do not have aria-roledescription="message", so lastThreadMessagePreview locator cannot be scoped to messageListItems (which filters for aria-roledescription="message"). It should remain scoped to page.getByRole('listitem') or mainMessageList.getByRole('listitem').

Learnt from: tassoevan
Repo: RocketChat/Rocket.Chat PR: 38528
File: apps/meteor/client/startup/roles.ts:14-14
Timestamp: 2026-02-10T16:32:42.586Z
Learning: In Rocket.Chat's Meteor client code, DDP streams use EJSON and Date fields arrive as Date objects; do not manually construct new Date() in stream handlers (for example, in sdk.stream()). Only REST API responses return plain JSON where dates are strings, so implement explicit conversion there if needed. Apply this guidance to all TypeScript files under apps/meteor/client to ensure consistent date handling in DDP streams and REST responses.

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.

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.

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.

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: CR
Repo: RocketChat/Rocket.Chat PR: 0
File: .cursor/rules/playwright.mdc:0-0
Timestamp: 2025-11-24T17:08:17.065Z
Learning: Applies to apps/meteor/tests/e2e/**/*.spec.ts : Utilize Playwright fixtures (`test`, `page`, `expect`) for consistency in test files

Learnt from: CR
Repo: RocketChat/Rocket.Chat PR: 0
File: .cursor/rules/playwright.mdc:0-0
Timestamp: 2025-11-24T17:08:17.065Z
Learning: Applies to apps/meteor/tests/e2e/**/*.spec.ts : Use `expect` matchers for assertions (`toEqual`, `toContain`, `toBeTruthy`, `toHaveLength`, etc.) instead of `assert` statements in Playwright tests

Learnt from: CR
Repo: RocketChat/Rocket.Chat PR: 0
File: .cursor/rules/playwright.mdc:0-0
Timestamp: 2025-11-24T17:08:17.065Z
Learning: Applies to apps/meteor/tests/e2e/**/*.spec.ts : Use `test.step()` for complex test scenarios to improve organization in Playwright tests

Learnt from: CR
Repo: RocketChat/Rocket.Chat PR: 0
File: .cursor/rules/playwright.mdc:0-0
Timestamp: 2025-11-24T17:08:17.065Z
Learning: Applies to apps/meteor/tests/e2e/**/*.spec.ts : Ensure tests run reliably in parallel without shared state conflicts

Learnt from: KevLehman
Repo: RocketChat/Rocket.Chat PR: 37091
File: ee/packages/abac/jest.config.ts:4-7
Timestamp: 2025-12-10T21:00:54.909Z
Learning: Rocket.Chat monorepo: Jest testMatch pattern '<rootDir>/src/**/*.spec.(ts|js|mjs)' is valid in this repo and used across multiple packages (e.g., packages/tools, ee/packages/omnichannel-services). Do not flag it as invalid in future reviews.

Learnt from: CR
Repo: RocketChat/Rocket.Chat PR: 0
File: .cursor/rules/playwright.mdc:0-0
Timestamp: 2025-11-24T17:08:17.065Z
Learning: Applies to apps/meteor/tests/e2e/**/*.spec.ts : Maintain test isolation between test cases in Playwright tests

Learnt from: CR
Repo: RocketChat/Rocket.Chat PR: 0
File: .cursor/rules/playwright.mdc:0-0
Timestamp: 2025-11-24T17:08:17.065Z
Learning: Applies to apps/meteor/tests/e2e/**/*.spec.ts : Prefer web-first assertions (`toBeVisible`, `toHaveText`, etc.) in Playwright tests

Learnt from: CR
Repo: RocketChat/Rocket.Chat PR: 0
File: .cursor/rules/playwright.mdc:0-0
Timestamp: 2025-11-24T17:08:17.065Z
Learning: Applies to apps/meteor/tests/e2e/**/*.{ts,spec.ts} : Follow Page Object Model pattern consistently in Playwright tests

Learnt from: CR
Repo: RocketChat/Rocket.Chat PR: 0
File: .cursor/rules/playwright.mdc:0-0
Timestamp: 2025-11-24T17:08:17.065Z
Learning: Applies to apps/meteor/tests/e2e/**/*.spec.ts : Use `test.beforeAll()` and `test.afterAll()` for setup/teardown in Playwright tests

Learnt from: juliajforesti
Repo: RocketChat/Rocket.Chat PR: 38493
File: apps/meteor/tests/e2e/omnichannel/omnichannel-send-pdf-transcript.spec.ts:66-67
Timestamp: 2026-02-24T19:22:48.358Z
Learning: In Playwright end-to-end tests (e.g., under apps/meteor/tests/e2e/...), prefer locating elements by translated text (getByText) and ARIA roles (getByRole) over data-qa attributes. If translation values change, update the corresponding test locators accordingly. Never use data-qa locators. This guideline applies to all Playwright e2e test specs in the repository and helps keep tests robust to UI text changes and accessible semantics.

Learnt from: tassoevan
Repo: RocketChat/Rocket.Chat PR: 39397
File: packages/gazzodown/src/code/CodeBlock.spec.tsx:47-68
Timestamp: 2026-03-06T18:10:15.268Z
Learning: In tests (especially those using testing-library/dom/jsdom) for Rocket.Chat components, the HTML <code> element has an implicit ARIA role of 'code'. Therefore, screen.getByRole('code') or screen.findByRole('code') will locate <code> elements even without a role attribute. Do not flag findByRole('code') as invalid in reviews; prefer using the implicit role instead of adding role="code" unless necessary for accessibility.