Learnt from: ericallam
Repo: triggerdotdev/trigger.dev PR: 3244
File: apps/webapp/app/components/code/TextEditor.tsx:81-86
Timestamp: 2026-03-22T13:26:12.060Z
Learning: In the triggerdotdev/trigger.dev codebase, do not flag `navigator.clipboard.writeText(...)` calls for `missing-await`/`unhandled-promise` issues. These clipboard writes are intentionally invoked without `await` and without `catch` handlers across the project; keep that behavior consistent when reviewing TypeScript/TSX files (e.g., usages like in `apps/webapp/app/components/code/TextEditor.tsx`).

Learnt from: matt-aitken
Repo: triggerdotdev/trigger.dev PR: 3187
File: apps/webapp/app/v3/services/alerts/deliverErrorGroupAlert.server.ts:200-204
Timestamp: 2026-03-22T19:24:14.403Z
Learning: In the triggerdotdev/trigger.dev codebase, webhook URLs are not expected to contain embedded credentials/secrets (e.g., fields like `ProjectAlertWebhookProperties` should only hold credential-free webhook endpoints). During code review, if you see logging or inclusion of raw webhook URLs in error messages, do not automatically treat it as a credential-leak/secrets-in-logs issue by default—first verify the URL does not contain embedded credentials (for example, no username/password in the URL, no obvious secret/token query params or fragments). If the URL is credential-free per this project’s conventions, allow the logging.

Learnt from: d-cs
Repo: triggerdotdev/trigger.dev PR: 3632
File: apps/webapp/sentry.server.ts:4-21
Timestamp: 2026-05-18T08:21:27.694Z
Learning: When handling Prisma error P1001 ("Can't reach database server") in TypeScript, don’t assume a single error shape. Prisma can surface P1001 via two different error classes/fields: `PrismaClientKnownRequestError` exposes it as `err.code === "P1001"` (common during mid-query connection drops), while `PrismaClientInitializationError` exposes it as `err.errorCode === "P1001"` (common on client startup failure). Therefore, predicates should use `err.code === "P1001" || err.errorCode === "P1001"`. Do not flag `err.code === "P1001"` as “unreachable/never matches,” as it is expected in production.

Learnt from: d-cs
Repo: triggerdotdev/trigger.dev PR: 3632
File: apps/webapp/sentry.server.ts:4-21
Timestamp: 2026-05-18T08:21:27.694Z
Learning: When handling Prisma errors for P1001 ("Can't reach database server"), do not assume it only appears under a single property name. Prisma may surface P1001 via either `PrismaClientKnownRequestError` (`err.code === "P1001"`, e.g., mid-query connection drops) or `PrismaClientInitializationError` (`err.errorCode === "P1001"`, e.g., client startup connection failure). To reliably detect the condition, check `err.code === "P1001" || err.errorCode === "P1001"`, and avoid review rules that would incorrectly flag `err.code === "P1001"` as unreachable/never-matching.

Learnt from: d-cs
Repo: triggerdotdev/trigger.dev PR: 3523
File: apps/webapp/app/routes/api.v3.batches.ts:178-181
Timestamp: 2026-05-05T09:38:02.512Z
Learning: When reviewing code that catches `ServiceValidationError` in `*.server.ts` files, do not blindly forward `error.status` to HTTP responses, because SVEs may be thrown with non-default statuses (e.g., 400/500) and forwarding them can cause client-visible behavioral regressions (e.g., surfacing 500s to clients). Prefer a safe default response status of `error.status ?? 422`, but only after confirming via the reachable call graph that the caught `ServiceValidationError` instances are expected to carry those non-default statuses; otherwise, normalize to `422` to avoid unexpected client-visible 5xx behavior.

Learnt from: ericallam
Repo: triggerdotdev/trigger.dev PR: 3542
File: apps/webapp/app/components/sessions/v1/SessionStatus.tsx:1-3
Timestamp: 2026-05-12T21:04:05.815Z
Learning: In this Remix + TypeScript codebase, do not flag a server/client boundary violation when a file imports only types from a module matching `*.server`.

Specifically, it’s safe to import types using `import type { Foo } from "*.server"` or `import { type Foo } from "*.server"` because TypeScript erases type-only imports at compile time and they emit no JavaScript, so they won’t cross the Remix server/client bundle boundary.

Only raise the boundary concern for value imports (e.g., `import { Foo }` without `type`, or `import Foo`), since those produce JavaScript output.

Learnt from: nicktrn
Repo: triggerdotdev/trigger.dev PR: 3836
File: apps/supervisor/src/backpressure/backpressureMonitor.ts:3-5
Timestamp: 2026-06-04T18:16:35.386Z
Learning: When reviewing TypeScript in this repo, apply the rule “prefer type aliases over interfaces” only to data/object shapes and union/intersection type modeling. If an interface is being used as a behavioral contract for collaborators to implement (e.g., method-shape interfaces that define required behavior, such as `BackpressureLogger` / `BackpressureSignalSource` in `apps/supervisor/src/backpressure/backpressureMonitor.ts`), keep it as an `interface` and do not flag it as a type-alias-vs-interface violation.

Learnt from: 0ski
Repo: triggerdotdev/trigger.dev PR: 3879
File: apps/webapp/app/models/vercelIntegration.server.ts:619-630
Timestamp: 2026-06-09T17:58:04.699Z
Learning: In this codebase, outbound raw `fetch` calls should typically rely on Node/undici’s default request timeout (about ~300s) rather than adding a per-call `AbortController` + `setTimeout` wrapper inside individual functions (e.g. in files like `apps/webapp/app/models/vercelIntegration.server.ts`). During code review, do not flag the absence of a per-call timeout on a single `fetch` as an issue; if per-call timeouts are needed, they should be implemented via a codebase-wide convention (e.g., a shared fetch wrapper or documented pattern) rather than ad-hoc per-function changes.

Learnt from: nicktrn
Repo: triggerdotdev/trigger.dev PR: 3291
File: apps/webapp/app/v3/featureFlags.ts:53-65
Timestamp: 2026-03-29T19:16:28.864Z
Learning: When reviewing TypeScript code that uses Zod v3, treat `z.coerce.*()` schemas as their direct Zod type (e.g., `z.coerce.boolean()` returns a `ZodBoolean` with `_def.typeName === "ZodBoolean"`) rather than a `ZodEffects`. Only `.preprocess()`, `.refine()`/`.superRefine()`, and `.transform()` are expected to wrap schemas in `ZodEffects`. Therefore, in reviewers’ logic like `getFlagControlType`, do not flag/unblock failures that require unwrapping `ZodEffects` when the input schema is a `z.coerce.*` schema.

Learnt from: myftija
Repo: triggerdotdev/trigger.dev PR: 3878
File: apps/webapp/app/v3/services/computeTemplateCreation.server.ts:0-0
Timestamp: 2026-06-09T16:27:26.195Z
Learning: When working in triggerdotdev/trigger.dev code related to worker-group/region default resolution (e.g., defaultWorkerInstanceGroupId handling used by getGlobalDefaultWorkerGroup, getDefaultWorkerGroupForProject, and RegionsPresenter), do NOT add org-level featureFlags overrides in only one resolution site. That can cause template creation routing/decisions to diverge from actual run routing. If org-level override of the default region/worker group is required, it must be centralized in getGlobalDefaultWorkerGroup so every resolution path remains aligned.

Learnt from: d-cs
Repo: triggerdotdev/trigger.dev PR: 3614
File: apps/webapp/app/v3/mollifier/mollifierGate.server.ts:48-52
Timestamp: 2026-05-14T08:21:07.614Z
Learning: When using Trigger.dev v3 feature flags in the webapp, prefer the existing per-org gating mechanism supported by `flag()` via the `overrides` argument. Pass `Organization.featureFlags` (from `environment.organization.featureFlags`) as the `overrides` value; overrides must take precedence over the global `featureFlag` row. Do not require schema changes or add an `orgId` field to `FlagsOptions` for per-org gating—use the overrides pattern consistently (e.g., in gate flows like `resolveOrgFlag` and any server code that threads `environment.organization.featureFlags` into the gate call).

Learnt from: myftija
Repo: triggerdotdev/trigger.dev PR: 3274
File: apps/webapp/app/services/runsReplicationService.server.ts:922-924
Timestamp: 2026-03-26T09:02:07.973Z
Learning: When parsing Trigger.dev task run annotations in server-side services, keep `TaskRun.annotations` strictly conforming to the `RunAnnotations` schema from `trigger.dev/core/v3`. If the code already uses `RunAnnotations.safeParse` (e.g., in a `#parseAnnotations` helper), treat that as intentional/necessary for atomic, schema-accurate annotation handling. Do not recommend relaxing the annotation payload schema or using a permissive “passthrough” parse path, since the annotations are expected to be written atomically in one operation and should not contain partial/legacy payloads that would require a looser parser.

Learnt from: d-cs
Repo: triggerdotdev/trigger.dev PR: 3678
File: apps/webapp/app/entry.server.tsx:0-0
Timestamp: 2026-05-20T17:21:18.543Z
Learning: In env.server.ts (Zod env schema), any environment variable you plan to access via the typed `env` export (e.g., `env.SENTRY_DSN`) must be explicitly declared in the schema. For `SENTRY_DSN`, include `SENTRY_DSN: z.string().optional()`; otherwise switching from `process.env.SENTRY_DSN` to `env.SENTRY_DSN` will fail TypeScript typechecking.

Learnt from: d-cs
Repo: triggerdotdev/trigger.dev PR: 3754
File: apps/webapp/app/env.server.ts:1104-1129
Timestamp: 2026-06-01T11:37:08.569Z
Learning: In apps/*/app/env.server.ts, any new background/periodic worker feature flag should hard-default to "0" (explicit opt-in) rather than inheriting from a parent flag (e.g., avoid defaulting to process.env.TRIGGER_MOLLIFIER_ENABLED ?? "0"). Inheriting can cause the new worker to auto-start on upgrade for deployments that already enabled the parent flag, turning on unexpected background load without an explicit rollout. Each worker component must require its own dedicated env var and default it explicitly to "0" (e.g., TRIGGER_MOLLIFIER_STALE_SWEEP_ENABLED defaults to "0" unless explicitly set to enable that worker).