diff --git a/ai b/ai
index bf528179e..e66bb8079 160000
--- a/ai
+++ b/ai
@@ -1 +1 @@
-Subproject commit bf528179eb36bf0de11f6aa3e146b4199c588771
+Subproject commit e66bb80796bf8387e4fbcc550f9d520eaa182f6e
diff --git a/server/.env.example b/server/.env.example
index 3cb56059e..c621748a0 100644
--- a/server/.env.example
+++ b/server/.env.example
@@ -65,9 +65,6 @@ SVIX_API_KEY=
 # This is used to generate singular / plural names for your features, which are used when in the dashboard and when you use Autumn UI components
 ANTHROPIC_API_KEY=
 
-# TINYBIRD US-EAST CLICKHOUSE (required for analytics paths that hit ClickHouse-direct)
-# During the us-west → us-east cutover, ClickHouse-direct reads (revenue
-# analytics, getCountAndSum, etc.) are routed to the us-east workspace via
-# this URL plus TINYBIRD_US_EAST_TOKEN. Legacy TINYBIRD_CLICKHOUSE_URL is
-# ignored at runtime.
+# TINYBIRD
+# ClickHouse endpoint for the us-east workspace (primary after cutover).
 TINYBIRD_US_EAST_CLICKHOUSE_URL=
diff --git a/server/src/external/tinybird/initClickhouse.ts b/server/src/external/tinybird/initClickhouse.ts
index 2987effbc..16e84bc9b 100644
--- a/server/src/external/tinybird/initClickhouse.ts
+++ b/server/src/external/tinybird/initClickhouse.ts
@@ -1,18 +1,5 @@
 import { type ClickHouseClient, createClient } from "@clickhouse/client";
 
-/**
- * ClickHouse-direct client for Tinybird (used by analytics paths like
- * revenue analytics, getCountAndSum, getTopEventNames, etc.). During the
- * us-west → us-east cutover transition this reads from the us-east
- * workspace's ClickHouse endpoint and admin token. The legacy
- * `TINYBIRD_CLICKHOUSE_URL` / `TINYBIRD_TOKEN` env vars are ignored at
- * runtime — primary moved to TINYBIRD_US_EAST_* in `tinybirdUtils.ts` and
- * this client follows it.
- *
- * Tinybird URL pattern reference:
- *   API:        https://api.<region>.aws.tinybird.co
- *   ClickHouse: https://clickhouse.<region>.aws.tinybird.co
- */
 const primaryClickhouseUrl = process.env.TINYBIRD_US_EAST_CLICKHOUSE_URL;
 const primaryToken = process.env.TINYBIRD_US_EAST_TOKEN;
 
diff --git a/server/src/external/tinybird/initTinybird.ts b/server/src/external/tinybird/initTinybird.ts
index d6efe3f8f..d90790a1f 100644
--- a/server/src/external/tinybird/initTinybird.ts
+++ b/server/src/external/tinybird/initTinybird.ts
@@ -8,13 +8,7 @@ import { createListEventsPaginatedPipe } from "./pipes/listEventsPaginatedPipe.j
 import { tinybirdConfig } from "./tinybirdUtils.js";
 import { z } from "./tinybirdZod.js";
 
-/**
- * Primary Tinybird REST API client — handles reads (pipes) and primary
- * writes (ingest). Configured from `TINYBIRD_US_EAST_*` env vars during the
- * us-west → us-east cutover transition (see `tinybirdUtils.ts`). The
- * dual-write safety-net secondary lives in `initTinybirdV2.ts` and
- * reads the legacy `TINYBIRD_API_URL` / `TINYBIRD_TOKEN` vars.
- */
+/** Primary Tinybird client — reads (pipes) and primary writes (ingest). */
 const tinybirdClient: Tinybird | null = tinybirdConfig
 	? new Tinybird(tinybirdConfig)
 	: null;
diff --git a/server/src/external/tinybird/initTinybirdV2.ts b/server/src/external/tinybird/initTinybirdV2.ts
index 82297b8e3..24620b84a 100644
--- a/server/src/external/tinybird/initTinybirdV2.ts
+++ b/server/src/external/tinybird/initTinybirdV2.ts
@@ -1,14 +1,8 @@
 import { createTinybirdApi } from "@tinybirdco/sdk";
 
-/**
- * Secondary Tinybird API client for dual-write safety net during the
- * us-west → us-east region cutover. Reads from the legacy `TINYBIRD_API_URL`
- * / `TINYBIRD_TOKEN` env vars, which point at us-west during the transition.
- * Primary lives on `TINYBIRD_US_EAST_*` (see `tinybirdUtils.ts`). Once
- * us-east is stable, delete this file + the dual-write logic in
- * `sendEvents.ts`, and remove `TINYBIRD_API_URL` / `TINYBIRD_TOKEN` from
- * Infisical.
- */
+// Dual-write safety net during the us-east cutover. Reads the legacy
+// us-west env vars; delete with the dual-write logic in `sendEvents.ts`
+// once us-east is stable.
 const secondaryApiUrl = process.env.TINYBIRD_API_URL;
 const secondaryToken = process.env.TINYBIRD_TOKEN;
 
diff --git a/server/src/external/tinybird/sendEvents/sendEvents.ts b/server/src/external/tinybird/sendEvents/sendEvents.ts
index 3969d981d..80c23cbd4 100644
--- a/server/src/external/tinybird/sendEvents/sendEvents.ts
+++ b/server/src/external/tinybird/sendEvents/sendEvents.ts
@@ -11,13 +11,7 @@ const generateErrorId = (): string => {
 	return `TB_ERR_${crypto.randomBytes(8).toString("hex").toUpperCase()}`;
 };
 
-/**
- * Send EventInsert[] to Tinybird primary and (if configured) the secondary
- * dual-write safety-net client. Each path is fired independently so a missing
- * or broken primary doesn't disable the secondary. Does not throw — failures
- * are logged and captured in Sentry with `tinybird_region=primary|secondary`
- * (the tag name is legacy from when the second client was region-specific).
- */
+/** Dual-write to Tinybird primary + secondary. Failures logged, never thrown. */
 export const sendEventsToTinybird = async ({
 	events,
 	logger,
@@ -29,10 +23,7 @@ export const sendEventsToTinybird = async ({
 		return;
 	}
 
-	// During the region cutover, primary (us-east via TINYBIRD_US_EAST_*) and
-	// secondary (us-west via legacy TINYBIRD_API_URL/TOKEN) are independent.
-	// If primary is misconfigured or down, the secondary safety net must
-	// still fire — that's the whole point of dual-write.
+	// Gate on either being configured — a broken primary must not silence the secondary.
 	if (!tinybirdIngest && !tinybirdSecondaryApi) {
 		logger?.debug(
 			"Tinybird not configured (neither primary nor secondary), skipping event send",
diff --git a/server/src/external/tinybird/tinybirdUtils.ts b/server/src/external/tinybird/tinybirdUtils.ts
index 5827babf6..7abe97e29 100644
--- a/server/src/external/tinybird/tinybirdUtils.ts
+++ b/server/src/external/tinybird/tinybirdUtils.ts
@@ -1,14 +1,8 @@
 import { ErrCode, RecaseError } from "@autumn/shared";
 import { StatusCodes } from "http-status-codes";
 
-/**
- * Primary Tinybird config — reads from `TINYBIRD_US_EAST_API_URL` /
- * `TINYBIRD_US_EAST_TOKEN` during the us-west → us-east cutover transition.
- * The legacy `TINYBIRD_API_URL` / `TINYBIRD_TOKEN` env vars now feed the
- * dual-write *secondary* client (`initTinybirdV2.ts`) as a safety net
- * during the transition. After cutover stabilises, the secondary client and
- * legacy env vars get removed in a follow-up cleanup.
- */
+// Primary points at us-east during the cutover; legacy us-west vars feed
+// the dual-write secondary in `initTinybirdV2.ts`.
 const primaryApiUrl = process.env.TINYBIRD_US_EAST_API_URL;
 const primaryToken = process.env.TINYBIRD_US_EAST_TOKEN;