[Fix] Fast automations ignore the configured session model

.changeset/fast-automation-session-model.md

@@ -0,0 +1,5 @@
+---
+'roomote': patch
+---
+
+Honor custom automation model and reasoning overrides for the Fast session across initial and resumed turns, without applying them to delegated coding tasks.

apps/docs/automations.mdx

@@ -118,8 +118,9 @@ Create arbitrary scheduled agent runs with:
 - an optional **preferred environment**: a named environment or **All
   repositories**, offered to the run as a hint for delegated work; leave it
   as **Let Roomote decide** to route normally
-- an optional **model** override for the runs; the default follows the
-  deployment task model
+- an optional **model** override for the automation's Fast session, including
+  later turns; without an override, it uses the deployment orchestration default.
+  Delegated coding tasks use their own model selection or deployment coding default
 - an optional **effort** override (`low`, `medium`, `high`, `extra high`, or
   `max`) when the selected model supports configurable reasoning
 - an optional **report destination**: a direct message to the automation owner,

packages/cloud-agents/src/server/fast-agent/fast-agent-conversation-repository.ts

@@ -28,6 +28,7 @@ import {
   ACP_ENVELOPE_EVENT_TYPES,
   fastAgentConversationSchema,
   type FastAgentConversationOwner,
+  type ReasoningEffort,
 } from '@roomote/types';
 
 import { FAST_RESPONDING_LEASE_MS } from './fast-agent-constants';
@@ -41,6 +42,8 @@ export type FastAgentConversationRecord = {
   userId: string | null;
   owner: FastAgentConversationOwner;
   title: string | null;
+  model: string | null;
+  reasoningEffort: ReasoningEffort | null;
   conversation: FastAgentConversation;
   /**
    * Durable visible history for cold starts and provider retries. OpenCode,
@@ -776,6 +779,8 @@ export interface FastAgentConversationRepository {
     sessionId?: string;
     /** Title to seed only when this call creates the conversation. */
     initialTitle?: string;
+    initialModel?: string;
+    initialReasoningEffort?: ReasoningEffort;
   }): Promise<FastAgentConversationGetOrCreateResult>;
   findById(input: {
     id: string;
@@ -916,6 +921,8 @@ async function loadConversationRecord(
     userId: record.userId,
     owner,
     title: record.title,
+    model: record.model,
+    reasoningEffort: record.reasoningEffort,
     conversation,
     compatibilityMessages: record.compatibilityMessages as ModelMessage[],
     openCodeSessionId: record.openCodeSessionId,
@@ -930,6 +937,8 @@ export const fastAgentConversationRepository: FastAgentConversationRepository =
       conversation,
       sessionId,
       initialTitle,
+      initialModel,
+      initialReasoningEffort,
     }) {
       const resolvedOwner =
         owner ?? (userId ? { kind: 'user' as const, userId } : null);
@@ -987,6 +996,8 @@ export const fastAgentConversationRepository: FastAgentConversationRepository =
                   ? resolvedOwner.automationKey
                   : null,
               title: initialTitle?.trim() || null,
+              model: initialModel,
+              reasoningEffort: initialReasoningEffort,
               surface: conversation.surface,
               workspaceId: conversation.workspaceId,
               conversationId: conversation.conversationId,

packages/cloud-agents/src/server/fast-agent/fast-agent-service.ts

@@ -1618,8 +1618,8 @@ export async function answerFastAgentQuestion({
   activeTasks?: FastAgentActiveTask[];
   adapter: FastAgentTurnAdapter;
   signal?: AbortSignal;
-  /** Explicit model override for this turn; defaults to the deployment's
-   * orchestration model. */
+  /** Explicit turn overrides; undefined uses stored session settings,
+   * while null uses deployment defaults. */
   model?: string | null;
   reasoningEffort?: ReasoningEffort | null;
   turnSource?: FastAgentTurnSource;
@@ -2860,6 +2860,9 @@ export async function answerFastAgentQuestion({
         return false;
       }),
     ]);
+    if (model === undefined) model = session.model;
+    if (reasoningEffort === undefined)
+      reasoningEffort = session.reasoningEffort;
     const availableIntegrations = selectFastRoomoteChannelTools({
       integrations: discoveredIntegrations,
       conversation,

packages/cloud-agents/src/server/fast-agent/fast-agent-session.ts

@@ -10,7 +10,11 @@ import {
   taskRuns,
   tasks,
 } from '@roomote/db/server';
-import type { FastAgentConversationOwner, RunStatus } from '@roomote/types';
+import type {
+  FastAgentConversationOwner,
+  ReasoningEffort,
+  RunStatus,
+} from '@roomote/types';
 import type { FastAgentConversation } from './fast-agent-conversation';
 import { fastAgentConversationRepository } from './fast-agent-conversation-repository';
 import type {
@@ -23,6 +27,8 @@ type FastAgentSessionRecord = {
   userId: string | null;
   owner: FastAgentConversationOwner;
   title: string | null;
+  model: string | null;
+  reasoningEffort: ReasoningEffort | null;
   conversation: FastAgentConversation;
   compatibilityMessages: ModelMessage[];
   openCodeSessionId: string | null;
@@ -41,6 +47,8 @@ export async function getOrCreateFastAgentSession({
   conversation,
   sessionId,
   initialTitle,
+  initialModel,
+  initialReasoningEffort,
 }: {
   owner?: FastAgentConversationOwner;
   userId?: string;
@@ -49,13 +57,17 @@ export async function getOrCreateFastAgentSession({
   sessionId?: string;
   /** Title to seed only when this call creates the conversation. */
   initialTitle?: string;
+  initialModel?: string;
+  initialReasoningEffort?: ReasoningEffort;
 }): Promise<FastAgentSessionRecord> {
   return fastAgentConversationRepository.getOrCreate({
     ...(owner ? { owner } : {}),
     ...(userId ? { userId } : {}),
     conversation,
     ...(sessionId ? { sessionId } : {}),
     ...(initialTitle ? { initialTitle } : {}),
+    ...(initialModel !== undefined ? { initialModel } : {}),
+    ...(initialReasoningEffort !== undefined ? { initialReasoningEffort } : {}),
   });
 }
 

packages/sdk/src/server/automations/custom-automations.ts

@@ -344,6 +344,8 @@ async function runFastCustomAutomation(params: {
     const session = await getOrCreateFastAgentSession({
       userId: params.automation.createdByUserId,
       conversation,
+      initialModel: params.automation.model ?? undefined,
+      initialReasoningEffort: params.automation.reasoningEffort ?? undefined,
     });
     if (rootMessageId) {
       await recordFastAgentConversationMessage({
@@ -360,14 +362,6 @@ async function runFastCustomAutomation(params: {
       launchClaimedAt: params.launchClaimedAt.toISOString(),
       prompt: params.automation.prompt,
       trigger: params.trigger,
-      ...(params.automation.model
-        ? { defaultTaskModel: params.automation.model }
-        : {}),
-      ...(params.automation.reasoningEffort
-        ? {
-            defaultTaskReasoningEffort: params.automation.reasoningEffort,
-          }
-        : {}),
       ...(params.preferredEnvironmentId
         ? { preferredEnvironmentId: params.preferredEnvironmentId }
         : {}),