diff --git a/src/main/runtime/orca-runtime-resolve-recovered-structured-tui-transcript.ts b/src/main/runtime/orca-runtime-resolve-recovered-structured-tui-transcript.ts
index b66f3ee04ac..497d5b381e7 100644
--- a/src/main/runtime/orca-runtime-resolve-recovered-structured-tui-transcript.ts
+++ b/src/main/runtime/orca-runtime-resolve-recovered-structured-tui-transcript.ts
@@ -13,7 +13,7 @@ import { getLocalProjectWorktreeGitOptions } from '../project-runtime-git-option
 import type { AgentSessionAttachParams } from '../native-chat/agent-session-wire/structured-agent-session-attach'
 import { getSystemCodexHomePath } from '../codex/codex-home-paths'
 import { resolveTuiAgentLaunchEnv } from '../../shared/tui-agent-launch-defaults'
-import { resolveNativeChatSessionOptionDefaults } from '../../shared/native-chat-session-option-defaults'
+import { resolveStructuredLaunchSeedOptions } from '../../shared/native-chat-session-option-defaults'
 import { hasPersistedStructuredAgentSessionStore as hasPersistedStructuredAgentSessionStoreOnDisk } from './structured-agent-session-runtime'
 import { getProfileUserDataPath } from '../orca-profiles/profile-storage-paths'
 import { homedir } from 'node:os'
@@ -162,17 +162,10 @@ export class OrcaRuntimeWithResolveRecoveredStructuredTuiTranscript extends Orca
     }
     const settings = this.requireStore().getSettings()
     const launchEnv = resolveTuiAgentLaunchEnv(input.agent, settings.agentDefaultEnv)
-    const defaults = resolveNativeChatSessionOptionDefaults(
+    const options = resolveStructuredLaunchSeedOptions(
       settings.nativeChatSessionOptions,
       input.agent
     )
-    const options = defaults
-      ? Object.fromEntries(
-          ['model', 'effort'].flatMap((key) =>
-            typeof defaults[key] === 'string' ? [[key, defaults[key]]] : []
-          )
-        )
-      : undefined
     const location = await this.resolveStructuredAgentSessionLocation(input.worktree)
     const workspacePath = (await this.resolveRuntimeFileTarget(input.worktree)).worktree.path
     return {
@@ -189,7 +182,7 @@ export class OrcaRuntimeWithResolveRecoveredStructuredTuiTranscript extends Orca
         variable: input.agent === 'claude' ? 'CLAUDE_CONFIG_DIR' : 'CODEX_HOME',
         path: await resolveAccountHomePath({ workspacePath, launchEnv, location })
       },
-      ...(options && Object.keys(options).length > 0 ? { options } : {}),
+      ...(options ? { options } : {}),
       runtimeKind: 'native'
     }
   }
diff --git a/src/shared/native-chat-session-option-defaults.test.ts b/src/shared/native-chat-session-option-defaults.test.ts
index aed767d67ac..eb197683bdf 100644
--- a/src/shared/native-chat-session-option-defaults.test.ts
+++ b/src/shared/native-chat-session-option-defaults.test.ts
@@ -2,6 +2,7 @@ import { describe, expect, it } from 'vitest'
 import {
   clearNativeChatSessionOptionModel,
   resolveNativeChatSessionOptionDefaults,
+  resolveStructuredLaunchSeedOptions,
   updateNativeChatSessionOptionDefaults
 } from './native-chat-session-option-defaults'
 import type { PersistedNativeChatSessionOptions } from './native-chat-session-options'
@@ -74,3 +75,56 @@ describe('resolveNativeChatSessionOptionDefaults', () => {
     })
   })
 })
+
+describe('resolveStructuredLaunchSeedOptions', () => {
+  const persistedCodex = (
+    valuesByModel: Record<string, Record<string, string | boolean>>
+  ): PersistedNativeChatSessionOptions =>
+    ({ codex: { model: 'gpt-5.6-sol', valuesByModel } }) as PersistedNativeChatSessionOptions
+
+  it('seeds the saved model and effort a structured create must apply', () => {
+    expect(
+      resolveStructuredLaunchSeedOptions(
+        persistedCodex({ 'gpt-5.6-sol': { effort: 'medium' } }),
+        'codex'
+      )
+    ).toEqual({ model: 'gpt-5.6-sol', effort: 'medium' })
+  })
+
+  it('drops ids the providers only accept mid-session', () => {
+    // `fastMode` is a boolean and `personality` is settable only mid-session;
+    // neither belongs in the reservation's Record<string, string>.
+    expect(
+      resolveStructuredLaunchSeedOptions(
+        persistedCodex({
+          'gpt-5.6-sol': { effort: 'high', fastMode: true, personality: 'concise' }
+        }),
+        'codex'
+      )
+    ).toEqual({ model: 'gpt-5.6-sol', effort: 'high' })
+  })
+
+  it('drops a seeded id whose persisted value is not a usable string', () => {
+    // settings.json is user-writable, so a non-string `effort` must not reach a
+    // record typed Record<string, string> and be emitted as a turn option.
+    expect(
+      resolveStructuredLaunchSeedOptions(
+        persistedCodex({ 'gpt-5.6-sol': { effort: true } }),
+        'codex'
+      )
+    ).toEqual({ model: 'gpt-5.6-sol' })
+    expect(
+      resolveStructuredLaunchSeedOptions(
+        persistedCodex({ 'gpt-5.6-sol': { effort: '  ' } }),
+        'codex'
+      )
+    ).toEqual({ model: 'gpt-5.6-sol' })
+  })
+
+  it('seeds nothing until a model is picked, so the CLI default survives', () => {
+    expect(resolveStructuredLaunchSeedOptions(undefined, 'codex')).toBeUndefined()
+    expect(
+      resolveStructuredLaunchSeedOptions({ codex: { valuesByModel: {} } }, 'codex')
+    ).toBeUndefined()
+  })
+})
diff --git a/src/shared/native-chat-session-option-defaults.ts b/src/shared/native-chat-session-option-defaults.ts
index 238005ccd62..41f607ca12a 100644
--- a/src/shared/native-chat-session-option-defaults.ts
+++ b/src/shared/native-chat-session-option-defaults.ts
@@ -28,6 +28,33 @@ export function resolveNativeChatSessionOptionDefaults(
   return values
 }
 
+/** Why only these two: they are the only ids the picker persists into
+ *  `nativeChatSessionOptions` that both structured providers also accept as
+ *  strings. Claude's `fastMode` is a boolean the durable `Record<string, string>`
+ *  record cannot carry, and the providers' remaining keys are settable only
+ *  mid-session, never seeded at launch. */
+const STRUCTURED_LAUNCH_SEED_OPTION_IDS = ['model', 'effort'] as const
+
+/** The saved selection a structured create seeds into its reservation, narrowed
+ *  to the wire-safe string subset the durable record and both providers accept. */
+export function resolveStructuredLaunchSeedOptions(
+  persisted: PersistedNativeChatSessionOptions | null | undefined,
+  agent: AgentType
+): Record<string, string> | undefined {
+  const defaults = resolveNativeChatSessionOptionDefaults(persisted, agent)
+  if (!defaults) {
+    return undefined
+  }
+  const seeded: Record<string, string> = {}
+  for (const id of STRUCTURED_LAUNCH_SEED_OPTION_IDS) {
+    const value = defaults[id]
+    if (typeof value === 'string' && value.trim()) {
+      seeded[id] = value
+    }
+  }
+  return Object.keys(seeded).length > 0 ? seeded : undefined
+}
+
 /** Why: an authoritative probe proved this id gone, and a stale `model` is emitted
  *  verbatim as a launch flag — grok exits fatally on an unknown one. Dropping only
  *  `model` keeps the per-model option values for a later reselect. */