chore: satisfy code-quality (oxlint no-duplicates, knip)

Merge the channel-type import into the existing @trigger.dev/core/v3 import in
ai.ts, and drop the unused isValidSessionChannelName helper (routes validate via
the exported regex directly).

Author: ericallam

apps/webapp/app/services/realtime/sessionChannels.server.ts

@@ -2,16 +2,12 @@ import type { RbacResource } from "@trigger.dev/rbac";
 
 /**
  * Channel names are both a URL path segment and an S2 stream-name segment, and
- * they fold into the RBAC resource id as `${key}:channels:${channel}` — so a
+ * they fold into the RBAC resource id as `${key}:channels:${channel}`, so a
  * `/` would break addressing and a `:` would break scope parsing. Constrain to
  * a safe, bounded alphabet.
  */
 export const SESSION_CHANNEL_NAME_REGEX = /^[A-Za-z0-9._-]{1,128}$/;
 
-export function isValidSessionChannelName(channel: string): boolean {
-  return SESSION_CHANNEL_NAME_REGEX.test(channel);
-}
-
 /**
  * Build the authorization resource set for a named channel. For each candidate
  * session key (URL form, friendlyId, externalId) we authorize BOTH the

packages/trigger-sdk/src/v3/ai.ts

@@ -41,6 +41,8 @@ import {
   type RouterCheckpoint,
   type SessionRouteTable,
   type SessionStreamRecord,
+  type AnySessionChannel,
+  type SessionChannelName,
 } from "@trigger.dev/core/v3";
 import type {
   FinishReason,
@@ -114,7 +116,6 @@ import {
   sessions,
   type SessionSubscribeOptions,
 } from "./sessions.js";
-import type { AnySessionChannel, SessionChannelName } from "@trigger.dev/core/v3";
 import { createTask } from "./shared.js";
 import { markChatAgentRunForStreamsWarning } from "./streams.js";
 import { tracer } from "./tracer.js";