diff --git a/src/renderer/store/slices/teamSlice.ts b/src/renderer/store/slices/teamSlice.ts
index 07c33f30..dc41b47d 100644
--- a/src/renderer/store/slices/teamSlice.ts
+++ b/src/renderer/store/slices/teamSlice.ts
@@ -11,7 +11,6 @@ import {
   canDisplayTaskChangesForOptions,
   type TaskChangeRequestOptions,
 } from '@renderer/utils/taskChangeRequest';
-import { extractProviderScopedBaseModel } from '@renderer/utils/teamModelContext';
 import { IpcError, unwrapIpc } from '@renderer/utils/unwrapIpc';
 import { stripAgentBlocks } from '@shared/constants/agentBlocks';
 import { getMemberColorByName } from '@shared/constants/memberColors';
@@ -19,7 +18,6 @@ import { DEFAULT_TEAM_GRAPH_LAYOUT_MODE } from '@shared/constants/teamGraphLayou
 import { DEFAULT_TOOL_APPROVAL_SETTINGS } from '@shared/types/team';
 import { isLeadMember } from '@shared/utils/leadDetection';
 import { createLogger } from '@shared/utils/logger';
-import { migrateProviderBackendId } from '@shared/utils/providerBackend';
 import { formatTaskDisplayLabel } from '@shared/utils/taskIdentity';
 import { buildTeamGraphDefaultLayoutSeed } from '@shared/utils/teamGraphDefaultLayout';
 import { getStableTeamOwnerId } from '@shared/utils/teamStableOwnerId';
@@ -50,6 +48,11 @@ import {
   mapSendMessageError,
   shouldInvalidateCachedTeamDataForError,
 } from '../team/teamErrorPolicies';
+import {
+  areTeamLaunchParamsEqual,
+  buildLaunchParamsFromRuntimeRequest,
+  type TeamLaunchParams,
+} from '../team/teamLaunchParams';
 import {
   captureTeamLocalStateEpoch,
   clearAllTeamLocalStateEpochs,
@@ -126,7 +129,6 @@ import type {
   AddTaskCommentRequest,
   CreateTaskRequest,
   CrossTeamSendRequest,
-  EffortLevel,
   GlobalTask,
   InboxMessage,
   KanbanColumnId,
@@ -148,7 +150,6 @@ import type {
   TeamLaunchRequest,
   TeamMemberActivityMeta,
   TeamMemberSnapshot,
-  TeamProviderId,
   TeamProvisioningProgress,
   TeamSummary,
   TeamTask,
@@ -167,6 +168,7 @@ export {
   selectTeamMemberSnapshotsForName,
   selectTeamTasksForName,
 } from '../team/teamDataSelectors';
+export type { TeamLaunchParams } from '../team/teamLaunchParams';
 export type {
   RefreshTeamMessagesHeadResult,
   TeamMessagesCacheEntry,
@@ -1226,16 +1228,6 @@ export interface PendingTeamSectionFocusState {
   section: TeamSectionTarget;
 }
 
-/** Per-team launch parameters shown in the header badge. */
-export interface TeamLaunchParams {
-  providerId?: TeamProviderId;
-  providerBackendId?: string;
-  model?: string; // 'opus' | 'sonnet' | 'haiku'
-  effort?: EffortLevel;
-  fastMode?: 'inherit' | 'on' | 'off';
-  limitContext?: boolean;
-}
-
 const resolvedMembersSelectorCache = new Map<
   string,
   {
@@ -2278,77 +2270,6 @@ function saveLaunchParams(teamName: string, params: TeamLaunchParams): void {
   }
 }
 
-/**
- * Extract the base model name from the raw model string sent to CLI.
- * E.g. 'opus[1m]' → 'opus', 'sonnet' → 'sonnet', undefined → undefined.
- */
-function extractBaseModel(raw?: string, providerId?: TeamProviderId): string | undefined {
-  return extractProviderScopedBaseModel(raw, providerId);
-}
-
-function buildLaunchParamsFromRuntimeRequest(
-  request: Pick<
-    TeamCreateRequest,
-    'providerId' | 'providerBackendId' | 'model' | 'effort' | 'fastMode' | 'limitContext'
-  >,
-  fallback?: TeamLaunchParams
-): TeamLaunchParams {
-  const providerId = request.providerId ?? fallback?.providerId ?? 'anthropic';
-  const providerChanged =
-    request.providerId != null &&
-    fallback?.providerId != null &&
-    request.providerId !== fallback.providerId;
-  const hasModel = Object.hasOwn(request, 'model');
-  const baseModel =
-    hasModel && typeof request.model === 'string'
-      ? extractBaseModel(request.model, providerId)
-      : undefined;
-  const rawProviderBackendId = Object.hasOwn(request, 'providerBackendId')
-    ? request.providerBackendId
-    : providerChanged
-      ? undefined
-      : fallback?.providerBackendId;
-  return {
-    providerId,
-    providerBackendId: migrateProviderBackendId(providerId, rawProviderBackendId),
-    model: hasModel
-      ? baseModel || 'default'
-      : (providerChanged ? undefined : fallback?.model) || 'default',
-    effort: Object.hasOwn(request, 'effort')
-      ? request.effort
-      : providerChanged
-        ? undefined
-        : fallback?.effort,
-    fastMode: Object.hasOwn(request, 'fastMode')
-      ? request.fastMode
-      : providerChanged
-        ? undefined
-        : fallback?.fastMode,
-    limitContext:
-      typeof request.limitContext === 'boolean'
-        ? request.limitContext
-        : providerChanged
-          ? false
-          : (fallback?.limitContext ?? false),
-  };
-}
-
-function areTeamLaunchParamsEqual(
-  left: TeamLaunchParams | undefined,
-  right: TeamLaunchParams | undefined
-): boolean {
-  if (left === right) return true;
-  if (!left || !right) return false;
-  return (
-    left.providerId === right.providerId &&
-    left.providerBackendId === right.providerBackendId &&
-    left.model === right.model &&
-    left.effort === right.effort &&
-    left.fastMode === right.fastMode &&
-    left.limitContext === right.limitContext
-  );
-}
-
 const TOOL_APPROVAL_PREFIX = 'team:toolApprovalSettings:';
 
 function parseToolApprovalSettings(raw: string | null): ToolApprovalSettings {
diff --git a/src/renderer/store/team/teamLaunchParams.ts b/src/renderer/store/team/teamLaunchParams.ts
new file mode 100644
index 00000000..02ab0f2b
--- /dev/null
+++ b/src/renderer/store/team/teamLaunchParams.ts
@@ -0,0 +1,89 @@
+import { extractProviderScopedBaseModel } from '@renderer/utils/teamModelContext';
+import { migrateProviderBackendId } from '@shared/utils/providerBackend';
+
+import type {
+  EffortLevel,
+  TeamCreateRequest,
+  TeamFastMode,
+  TeamProviderId,
+} from '@shared/types';
+
+/** Per-team launch parameters shown in the header badge. */
+export interface TeamLaunchParams {
+  providerId?: TeamProviderId;
+  providerBackendId?: string;
+  model?: string;
+  effort?: EffortLevel;
+  fastMode?: TeamFastMode;
+  limitContext?: boolean;
+}
+
+export function extractBaseModel(
+  raw?: string,
+  providerId?: TeamProviderId
+): string | undefined {
+  return extractProviderScopedBaseModel(raw, providerId);
+}
+
+export function buildLaunchParamsFromRuntimeRequest(
+  request: Pick<
+    TeamCreateRequest,
+    'providerId' | 'providerBackendId' | 'model' | 'effort' | 'fastMode' | 'limitContext'
+  >,
+  fallback?: TeamLaunchParams
+): TeamLaunchParams {
+  const providerId = request.providerId ?? fallback?.providerId ?? 'anthropic';
+  const providerChanged =
+    request.providerId != null &&
+    fallback?.providerId != null &&
+    request.providerId !== fallback.providerId;
+  const hasModel = Object.hasOwn(request, 'model');
+  const baseModel =
+    hasModel && typeof request.model === 'string'
+      ? extractBaseModel(request.model, providerId)
+      : undefined;
+  const rawProviderBackendId = Object.hasOwn(request, 'providerBackendId')
+    ? request.providerBackendId
+    : providerChanged
+      ? undefined
+      : fallback?.providerBackendId;
+  return {
+    providerId,
+    providerBackendId: migrateProviderBackendId(providerId, rawProviderBackendId),
+    model: hasModel
+      ? baseModel || 'default'
+      : (providerChanged ? undefined : fallback?.model) || 'default',
+    effort: Object.hasOwn(request, 'effort')
+      ? request.effort
+      : providerChanged
+        ? undefined
+        : fallback?.effort,
+    fastMode: Object.hasOwn(request, 'fastMode')
+      ? request.fastMode
+      : providerChanged
+        ? undefined
+        : fallback?.fastMode,
+    limitContext:
+      typeof request.limitContext === 'boolean'
+        ? request.limitContext
+        : providerChanged
+          ? false
+          : (fallback?.limitContext ?? false),
+  };
+}
+
+export function areTeamLaunchParamsEqual(
+  left: TeamLaunchParams | undefined,
+  right: TeamLaunchParams | undefined
+): boolean {
+  if (left === right) return true;
+  if (!left || !right) return false;
+  return (
+    left.providerId === right.providerId &&
+    left.providerBackendId === right.providerBackendId &&
+    left.model === right.model &&
+    left.effort === right.effort &&
+    left.fastMode === right.fastMode &&
+    left.limitContext === right.limitContext
+  );
+}
diff --git a/test/renderer/store/teamLaunchParams.test.ts b/test/renderer/store/teamLaunchParams.test.ts
new file mode 100644
index 00000000..fc898ffc
--- /dev/null
+++ b/test/renderer/store/teamLaunchParams.test.ts
@@ -0,0 +1,132 @@
+import { describe, expect, it } from 'vitest';
+
+import {
+  areTeamLaunchParamsEqual,
+  buildLaunchParamsFromRuntimeRequest,
+  extractBaseModel,
+} from '../../../src/renderer/store/team/teamLaunchParams';
+
+import type { TeamLaunchParams } from '../../../src/renderer/store/team/teamLaunchParams';
+
+const codexFallback: TeamLaunchParams = {
+  providerId: 'codex',
+  providerBackendId: 'codex-native',
+  model: 'gpt-5.5',
+  effort: 'medium',
+  fastMode: 'on',
+  limitContext: true,
+};
+
+describe('teamLaunchParams', () => {
+  it('extracts provider-scoped base models', () => {
+    expect(extractBaseModel(' opus[1m] ', 'anthropic')).toBe('opus');
+    expect(extractBaseModel('sonnet', 'anthropic')).toBe('sonnet');
+    expect(extractBaseModel('gpt-5.5[1m]', 'codex')).toBe('gpt-5.5[1m]');
+    expect(extractBaseModel('   ', 'anthropic')).toBeUndefined();
+    expect(extractBaseModel(undefined, 'anthropic')).toBeUndefined();
+  });
+
+  it('builds default anthropic launch params without fallback', () => {
+    expect(buildLaunchParamsFromRuntimeRequest({})).toEqual({
+      providerId: 'anthropic',
+      providerBackendId: undefined,
+      model: 'default',
+      effort: undefined,
+      fastMode: undefined,
+      limitContext: false,
+    });
+  });
+
+  it('preserves fallback values for metadata-only requests on the same provider', () => {
+    expect(buildLaunchParamsFromRuntimeRequest({}, codexFallback)).toEqual(codexFallback);
+  });
+
+  it('resets provider-scoped values when the provider changes without explicit fields', () => {
+    expect(
+      buildLaunchParamsFromRuntimeRequest(
+        {
+          providerId: 'anthropic',
+        },
+        codexFallback
+      )
+    ).toEqual({
+      providerId: 'anthropic',
+      providerBackendId: undefined,
+      model: 'default',
+      effort: undefined,
+      fastMode: undefined,
+      limitContext: false,
+    });
+  });
+
+  it('uses explicit model, effort, fast mode, and limitContext when present', () => {
+    expect(
+      buildLaunchParamsFromRuntimeRequest(
+        {
+          providerId: 'anthropic',
+          model: 'haiku[1m]',
+          effort: 'low',
+          fastMode: 'off',
+          limitContext: false,
+        },
+        codexFallback
+      )
+    ).toEqual({
+      providerId: 'anthropic',
+      providerBackendId: undefined,
+      model: 'haiku',
+      effort: 'low',
+      fastMode: 'off',
+      limitContext: false,
+    });
+  });
+
+  it('treats an explicit undefined model as Default for the active provider', () => {
+    expect(
+      buildLaunchParamsFromRuntimeRequest(
+        {
+          providerId: 'codex',
+          providerBackendId: 'codex-native',
+          model: undefined,
+          effort: 'low',
+        },
+        codexFallback
+      )
+    ).toEqual({
+      providerId: 'codex',
+      providerBackendId: 'codex-native',
+      model: 'default',
+      effort: 'low',
+      fastMode: 'on',
+      limitContext: true,
+    });
+  });
+
+  it('migrates legacy provider backend ids for codex requests', () => {
+    expect(
+      buildLaunchParamsFromRuntimeRequest({
+        providerId: 'codex',
+        providerBackendId: 'api',
+      })
+    ).toEqual({
+      providerId: 'codex',
+      providerBackendId: 'codex-native',
+      model: 'default',
+      effort: undefined,
+      fastMode: undefined,
+      limitContext: false,
+    });
+  });
+
+  it('compares launch params by all persisted fields', () => {
+    expect(areTeamLaunchParamsEqual(codexFallback, { ...codexFallback })).toBe(true);
+    expect(
+      areTeamLaunchParamsEqual(codexFallback, {
+        ...codexFallback,
+        fastMode: 'off',
+      })
+    ).toBe(false);
+    expect(areTeamLaunchParamsEqual(undefined, undefined)).toBe(true);
+    expect(areTeamLaunchParamsEqual(undefined, codexFallback)).toBe(false);
+  });
+});