diff --git a/config/reliability-gates.jsonc b/config/reliability-gates.jsonc
index a2993e76354..3b3211ff7b4 100644
--- a/config/reliability-gates.jsonc
+++ b/config/reliability-gates.jsonc
@@ -10346,7 +10346,8 @@
           "assertions": [
             "legacy hosts without acknowledgement cannot stamp client options as applied",
             "client-built commands retain their known applied state",
-            "fallback agents own draft state without inheriting requested-agent options"
+            "fallback agents own draft state without inheriting requested-agent options",
+            "paired-runtime receipts target the authoritative web-surface agent tab"
           ]
         }
       ],
diff --git a/src/renderer/src/hooks/useComposerState-host-context-boundaries.test.ts b/src/renderer/src/hooks/useComposerState-host-context-boundaries.test.ts
index 89d754d8a86..c2707c9b7f7 100644
--- a/src/renderer/src/hooks/useComposerState-host-context-boundaries.test.ts
+++ b/src/renderer/src/hooks/useComposerState-host-context-boundaries.test.ts
@@ -755,6 +755,7 @@ describe('useComposerState host-context boundaries', () => {
       'startupSessionOptions: { agent: tuiAgent, values: startupPlan.sessionOptions }'
     )
     expect(fullSubmit).toContain('resolveCreatedAgentAppliedSessionOptions')
+    expect(fullSubmit).toContain('resolveLaunchAgentTabId')
     expect(fullSubmit).not.toContain('platform: CLIENT_PLATFORM')
 
     const quickSubmit = sourceBetween(
diff --git a/src/renderer/src/hooks/useComposerState.ts b/src/renderer/src/hooks/useComposerState.ts
index c4578b4ba84..6d3d7253bb1 100644
--- a/src/renderer/src/hooks/useComposerState.ts
+++ b/src/renderer/src/hooks/useComposerState.ts
@@ -15,7 +15,10 @@ import {
 } from '@/lib/github-links'
 import { activateAndRevealWorktree, type AgentStartedTelemetry } from '@/lib/worktree-activation'
 import { runBackgroundWorktreeCreation } from '@/lib/worktree-creation-flow'
-import { resolveCreatedAgentAppliedSessionOptions } from '@/lib/worktree-creation-agent-seeds'
+import {
+  resolveCreatedAgentAppliedSessionOptions,
+  resolveLaunchAgentTabId
+} from '@/lib/worktree-creation-agent-seeds'
 import {
   findPendingLinkedWorkItemCreationId,
   type WorktreeCreationRequest
@@ -3919,8 +3922,13 @@ export function useComposerState(options: UseComposerStateOptions): UseComposerS
           backendSpawnedStartup && !backendStartup
             ? (worktree.createdWithAgent ?? tuiAgent)
             : tuiAgent
-        const optionScopeKey =
-          (activation !== false ? activation.primaryTabId : null) ?? result.startupTerminal?.tabId
+        const optionScopeKey = resolveLaunchAgentTabId(useAppStore.getState(), {
+          agent: createdAgent,
+          worktreeId: worktree.id,
+          primaryTabId: activation === false ? null : activation.primaryTabId,
+          startupTerminalTabId: result.startupTerminal?.tabId,
+          backendSpawned: backendSpawnedStartup
+        })
         if (optionScopeKey) {
           seedNativeChatAppliedSessionOptions(
             optionScopeKey,
diff --git a/src/renderer/src/lib/worktree-creation-agent-seeds.ts b/src/renderer/src/lib/worktree-creation-agent-seeds.ts
index 4eb58fa79d2..c3f341c1db7 100644
--- a/src/renderer/src/lib/worktree-creation-agent-seeds.ts
+++ b/src/renderer/src/lib/worktree-creation-agent-seeds.ts
@@ -38,7 +38,7 @@ export function resolveCreatedAgentAppliedSessionOptions(args: {
  * (e.g. "dev server", "logs", "shell") the worktree's first tab runs no agent,
  * and activation's `primaryTabId` is only the worktree's primary tab.
  */
-function resolveLaunchAgentTabId(
+export function resolveLaunchAgentTabId(
   state: AppStoreSnapshot,
   args: {
     agent: TuiAgent