From 777114e97a38f71ec897db18617a8136c9f57b24 Mon Sep 17 00:00:00 2001
From: Ben White <ben@benjackwhite.co.uk>
Date: Mon, 13 Jul 2026 14:16:35 +0200
Subject: [PATCH] fix(canvas): send model when generating CONTEXT.md with agent

The "Generate with agent" flow for a channel's CONTEXT.md starts a cloud run
without a model. The cloud-create path defaults the runtime adapter to "claude"
but leaves the model unset, and the task-run bootstrap API rejects a runtime
adapter without a paired model ("This field is required when selecting a cloud
runtime."), so generation never starts.

Pin the default gateway model in the generate flow, matching the adapter the
saga defaults to, so the adapter/model pair the API requires is always complete.

Generated-By: PostHog Code
Task-Id: c292e951-0bde-4d16-8fb2-c18104829a09
---
 packages/ui/src/features/canvas/hooks/useGenerateContext.ts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/packages/ui/src/features/canvas/hooks/useGenerateContext.ts b/packages/ui/src/features/canvas/hooks/useGenerateContext.ts
index b868629eb3..b75c052c62 100644
--- a/packages/ui/src/features/canvas/hooks/useGenerateContext.ts
+++ b/packages/ui/src/features/canvas/hooks/useGenerateContext.ts
@@ -1,3 +1,4 @@
+import { DEFAULT_GATEWAY_MODEL } from "@posthog/agent/gateway-models";
 import {
   TASK_SERVICE,
   type TaskService,
@@ -42,6 +43,11 @@ export function useGenerateContext(channelId: string, channelName: string) {
             // test a local build of these features before merging.
             workspaceMode,
             allowNoRepo: true,
+            // A cloud run pairs a runtime adapter with a model, and the API
+            // rejects one without the other. Since this flow lets the agent pick
+            // its repo at runtime, it never surfaces a model picker, so pin the
+            // default gateway model here to match the adapter the saga defaults to.
+            model: DEFAULT_GATEWAY_MODEL,
           },
           (output) => invalidateTasks(output.task),
         );