PostHog · edwinyjlim · Sep 8, 2026 · Sep 8, 2026
diff --git a/README.md b/README.md
@@ -614,7 +614,7 @@ point is `evaluateWizardReadiness()`, which returns one of three values:
 | --- | --- |
 | `types.ts` | Enums, interfaces (`ServiceHealthStatus`, `AllServicesHealth`, etc.) |
 | `statuspage.ts` | Statuspage.io v2 API helpers + checks for Anthropic, PostHog, GitHub, npm, Cloudflare |
-| `endpoints.ts` | Direct endpoint checks for LLM Gateway (`/_liveness`), MCP (`/`), and the skills origins (`skill-menu.json` on GitHub Releases + the AWS mirror) |
+| `endpoints.ts` | Direct endpoint checks for MCP (`/`) and the skills origins (`skill-menu.json` on GitHub Releases + the AWS mirror) |
 | `readiness.ts` | `checkAllExternalServices`, `evaluateWizardReadiness`, readiness config |
 | `index.ts` | Barrel re-export |
 | `testme.md` | Test running instructions and endpoint reference |
@@ -632,10 +632,14 @@ two arrays:
 ### Current defaults
 
 ```ts
-downBlocksRun: ['anthropic', 'npmOverall', 'llmGateway', 'mcp', 'skillsOrigin'],
+downBlocksRun: ['anthropic', 'npmOverall', 'mcp', 'skillsOrigin'],
 degradedBlocksRun: ['anthropic'],
 ```
 
+The AI gateway is deliberately absent: its URL is only known from the run's
+token mint at bootstrap, so there is nothing static to probe — and a failed
+mint already stops the run with the server's reason.
+
 `skillsOrigin` is one entry covering two origins: skills are published to
 GitHub Releases and an AWS mirror under the same filenames, and downloads fail
 over between them (`src/lib/fetch-retry.ts`). Both are probed in parallel, so

diff --git a/src/lib/health-checks/__tests__/health-checks.test.ts b/src/lib/health-checks/__tests__/health-checks.test.ts
diff --git a/src/lib/health-checks/endpoints.ts b/src/lib/health-checks/endpoints.ts
@@ -13,10 +13,6 @@ import { ServiceHealthStatus, type BaseHealthResult } from './types';
 // NoConnection means we don't know whose fault it is; readiness reconciles
 // against the status page before deciding how to surface it to the user.
 //
-// LLM Gateway – FastAPI service
-//   Source: posthog/services/llm-gateway/src/llm_gateway/api/health.py
-//   GET /_liveness → 200 {"status":"alive"}
-//
 // MCP – Cloudflare Worker
 //   Source: posthog/services/mcp/src/index.ts
 //   GET / → 302 to posthog.com docs. The redirect proves the worker is up.
@@ -65,7 +61,8 @@ async function attemptFetch(
   }
 }
 
-async function fetchEndpointHealth(
+// Exported so tests can pin the retry/taxonomy machinery directly.
+export async function fetchEndpointHealth(
   url: string,
   timeoutMs = 5000,
   isExpectedStatus: (status: number) => boolean = (s) => s === 200,
@@ -137,9 +134,6 @@ async function fetchEndpointHealth(
   return result;
 }
 
-export const checkLlmGatewayHealth = (): Promise<BaseHealthResult> =>
-  fetchEndpointHealth('https://gateway.us.posthog.com/_liveness');
-
 export const checkMcpHealth = (): Promise<BaseHealthResult> =>
   fetchEndpointHealth(
     'https://mcp.posthog.com/',

diff --git a/src/lib/health-checks/index.ts b/src/lib/health-checks/index.ts
@@ -22,11 +22,7 @@ export {
   resetPosthogHealthCache,
 } from './incidentio';
 
-export {
-  checkLlmGatewayHealth,
-  checkMcpHealth,
-  checkSkillsOriginHealth,
-} from './endpoints';
+export { checkMcpHealth, checkSkillsOriginHealth } from './endpoints';
 
 export {
   type WizardReadinessConfig,

diff --git a/src/lib/health-checks/readiness.ts b/src/lib/health-checks/readiness.ts
@@ -17,11 +17,7 @@ import {
   checkPosthogOverallHealth,
   checkPosthogComponentHealth,
 } from './incidentio';
-import {
-  checkLlmGatewayHealth,
-  checkMcpHealth,
-  checkSkillsOriginHealth,
-} from './endpoints';
+import { checkMcpHealth, checkSkillsOriginHealth } from './endpoints';
 import { logToFile } from '@utils/debug';
 
 // ---------------------------------------------------------------------------
@@ -37,7 +33,6 @@ export const SERVICE_LABELS: Record<HealthCheckKey, string> = {
   npmComponents: 'npm (components)',
   cloudflareOverall: 'Cloudflare',
   cloudflareComponents: 'Cloudflare (components)',
-  llmGateway: 'LLM Gateway',
   mcp: 'MCP',
   skillsOrigin: 'Skills download',
 };
@@ -56,26 +51,24 @@ export interface WizardReadinessConfig {
 /**
  * See README section "Health checks" for the full rationale.
  * Adjust these arrays to change what blocks a wizard run.
+ *
+ * The AI gateway is not probed: its URL is only known from the run's token
+ * mint, and a failed mint already stops the run at bootstrap with the
+ * server's reason.
  */
 export const DEFAULT_WIZARD_READINESS_CONFIG: WizardReadinessConfig = {
-  downBlocksRun: [
-    'anthropic',
-    'npmOverall',
-    'llmGateway',
-    'mcp',
-    'skillsOrigin',
-  ],
+  downBlocksRun: ['anthropic', 'npmOverall', 'mcp', 'skillsOrigin'],
   degradedBlocksRun: ['anthropic'],
 };
 
 /**
  * Reduced readiness config for --signup provisioning flows.
  *
- * Provisioning only needs PostHog and the LLM Gateway - it doesn't
- * use Anthropic directly, npm, the skills origins, or MCP.
+ * Provisioning only needs PostHog - it doesn't use Anthropic directly, npm,
+ * the skills origins, or MCP.
  */
 export const SIGNUP_WIZARD_READINESS_CONFIG: WizardReadinessConfig = {
-  downBlocksRun: ['posthogOverall', 'llmGateway'],
+  downBlocksRun: ['posthogOverall'],
 };
 
 // ---------------------------------------------------------------------------
@@ -92,7 +85,6 @@ export async function checkAllExternalServices(): Promise<AllServicesHealth> {
     npmComponents,
     cloudflareOverall,
     cloudflareComponents,
-    llmGateway,
     mcp,
     skillsOrigin,
   ] = await Promise.all([
@@ -104,7 +96,6 @@ export async function checkAllExternalServices(): Promise<AllServicesHealth> {
     checkNpmComponentHealth(),
     checkCloudflareOverallHealth(),
     checkCloudflareComponentHealth(),
-    checkLlmGatewayHealth(),
     checkMcpHealth(),
     checkSkillsOriginHealth(),
   ]);
@@ -118,7 +109,6 @@ export async function checkAllExternalServices(): Promise<AllServicesHealth> {
     npmComponents,
     cloudflareOverall,
     cloudflareComponents,
-    llmGateway,
     mcp,
     skillsOrigin,
   };
@@ -131,7 +121,7 @@ export async function checkAllExternalServices(): Promise<AllServicesHealth> {
  * official status page (`posthogstatus.com`):
  *
  *   - Status page says PostHog is `Down` / `Degraded` → upgrade
- *     llmGateway / mcp to `Down`. The status page corroborates.
+ *     mcp to `Down`. The status page corroborates.
  *   - Status page is `Healthy` → keep `NoConnection`. The status page
  *     contradicts; this is probably the user's network.
  *   - Status page is also `NoConnection` → keep `NoConnection`. User
@@ -145,11 +135,11 @@ export async function checkAllExternalServices(): Promise<AllServicesHealth> {
  * when incident.io's API parsed successfully and reported a real
  * `partial_outage` or `degraded_performance` for some component. That's
  * PostHog acknowledging an issue, even if narrower than a full outage.
- * If our gateway probe is also failing, those two signals together
+ * If our MCP probe is also failing, those two signals together
  * justify pointing at PostHog rather than the user.
  *
  * A narrower variant — only corroborate when the affected component is
- * gateway-related (LLM, US/EU Cloud, app) — would be more precise. We
+ * MCP-related (US/EU Cloud, app) — would be more precise. We
  * have the data in `posthogComponents` but don't use it here. If the
  * analytics show false positives concentrated in this case, it's a
  * cheap follow-up.
@@ -179,7 +169,6 @@ export function reconcilePosthogReachability(
 
   return {
     ...health,
-    llmGateway: upgrade(health.llmGateway),
     mcp: upgrade(health.mcp),
   };
 }
@@ -346,7 +335,6 @@ function allUnknown(error: string): AllServicesHealth {
     npmComponents: { ...base },
     cloudflareOverall: base,
     cloudflareComponents: { ...base },
-    llmGateway: base,
     mcp: base,
     skillsOrigin: base,
   };

diff --git a/src/lib/health-checks/testme.md b/src/lib/health-checks/testme.md
@@ -40,7 +40,6 @@ responses captured from production endpoints on 2026-03-05.
 | npm (components)        | `https://status.npmjs.org/api/v2/summary.json`         | Adds `components[]` array             |
 | Cloudflare              | `https://www.cloudflarestatus.com/api/v2/status.json`  | Same shape                            |
 | Cloudflare (components) | `https://www.cloudflarestatus.com/api/v2/summary.json` | Adds `components[]` array             |
-| LLM Gateway             | `https://gateway.us.posthog.com/_liveness`             | `{"status":"alive"}` (HTTP 200)       |
 | MCP                     | `https://mcp.posthog.com/`                             | HTML landing page (HTTP 200)          |
 
 ### Statuspage.io API v2 reference
@@ -54,13 +53,6 @@ responses captured from production endpoints on 2026-03-05.
 - Component docs:
   <https://support.atlassian.com/statuspage/docs/show-service-status-with-components>
 
-### LLM Gateway
-
-- Source: `posthog/services/llm-gateway/src/llm_gateway/api/health.py`
-- `GET /` → `{"service":"llm-gateway","status":"running"}`
-- `GET /_liveness` → `{"status":"alive"}` (no DB dependency)
-- `GET /_readiness` → `{"status":"ready"}` (checks Postgres with `SELECT 1`)
-
 ### MCP
 
 - Source: `posthog/services/mcp/src/index.ts`

diff --git a/src/lib/health-checks/types.ts b/src/lib/health-checks/types.ts
@@ -37,7 +37,6 @@ export interface AllServicesHealth {
   npmComponents: ComponentHealthResult;
   cloudflareOverall: BaseHealthResult;
   cloudflareComponents: ComponentHealthResult;
-  llmGateway: BaseHealthResult;
   mcp: BaseHealthResult;
   skillsOrigin: BaseHealthResult;
 }

diff --git a/src/ui/tui/playground/demos/HealthCheckDemo.tsx b/src/ui/tui/playground/demos/HealthCheckDemo.tsx
@@ -44,7 +44,6 @@ const MOCK_CONFIRMED_OUTAGE: AllServicesHealth = {
   },
   cloudflareOverall: HEALTHY,
   cloudflareComponents: { status: ServiceHealthStatus.Healthy },
-  llmGateway: HEALTHY,
   mcp: HEALTHY,
   skillsOrigin: HEALTHY,
 };
@@ -58,10 +57,6 @@ const MOCK_NO_CONNECTION: AllServicesHealth = {
   npmComponents: { status: ServiceHealthStatus.Healthy },
   cloudflareOverall: HEALTHY,
   cloudflareComponents: { status: ServiceHealthStatus.Healthy },
-  llmGateway: {
-    status: ServiceHealthStatus.NoConnection,
-    error: 'getaddrinfo ENOTFOUND gateway.us.posthog.com',
-  },
   mcp: {
     status: ServiceHealthStatus.NoConnection,
     error: 'fetch failed',

diff --git a/src/ui/tui/store.ts b/src/ui/tui/store.ts
@@ -156,7 +156,7 @@ function captureHealthCheckBlocked(result: WizardReadinessResult): void {
     const posthogStatus = health.posthogOverall?.status;
     const retriesUsed = Math.max(
       0,
-      ...(['llmGateway', 'mcp', 'skillsOrigin'] as const).map((k) => {
+      ...(['mcp', 'skillsOrigin'] as const).map((k) => {
         const ind = health[k]?.rawIndicator ?? '';
         const m = ind.match(/attempts=(\d+)/);
         return m ? Number(m[1]) - 1 : 0;