diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index b4b69d6b651..afa721690d0 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -1117,7 +1117,6 @@ jobs:
           src/main/browser/cookies/browser-google-cookie-clear.electron.test.ts
           src/main/browser/guest-lifecycle/popups/presentation/popup-origin-chrome.electron.test.ts
           src/main/browser/guest-lifecycle/navigation/browser-link-materialization.electron.test.ts
-          src/main/browser/guest-lifecycle/popups/compatibility/browser-popup-compatibility.electron.test.ts
           src/main/browser/guest-lifecycle/popups/compatibility/browser-popup-native-compatibility.electron.test.ts
           src/main/browser/guest-lifecycle/popups/compatibility/browser-popup-background-compatibility.electron.test.ts
           src/main/browser/extensions/api-runtime/browser-extension-api.electron.test.ts
diff --git a/config/scripts/ci/unit-selection/dependency-graph/ci-unit-files.mjs b/config/scripts/ci/unit-selection/dependency-graph/ci-unit-files.mjs
index 2ff54f9cccc..8613ec9468f 100644
--- a/config/scripts/ci/unit-selection/dependency-graph/ci-unit-files.mjs
+++ b/config/scripts/ci/unit-selection/dependency-graph/ci-unit-files.mjs
@@ -52,7 +52,6 @@ export const UNIT_EXCLUDE = [
   'src/main/browser/guest-lifecycle/popups/presentation/popup-origin-chrome.electron.test.ts',
   'src/main/browser/guest-lifecycle/navigation/browser-link-materialization.electron.test.ts',
   'src/main/browser/client-pages/renderer/browser-client-page-renderer-lifecycle.electron.test.ts',
-  'src/main/browser/guest-lifecycle/popups/compatibility/browser-popup-compatibility.electron.test.ts',
   'src/main/browser/guest-lifecycle/popups/compatibility/browser-popup-native-compatibility.electron.test.ts',
   'src/main/browser/guest-lifecycle/popups/compatibility/browser-popup-background-compatibility.electron.test.ts',
   'src/main/browser/extensions/api-runtime/browser-extension-api.electron.test.ts',
diff --git a/config/scripts/test-runtime/sqlite-admission/vitest-node-runtime-files.mjs b/config/scripts/test-runtime/sqlite-admission/vitest-node-runtime-files.mjs
index c3860f770ef..155ed1f6ec5 100644
--- a/config/scripts/test-runtime/sqlite-admission/vitest-node-runtime-files.mjs
+++ b/config/scripts/test-runtime/sqlite-admission/vitest-node-runtime-files.mjs
@@ -107,7 +107,6 @@ const NODE_RUNTIME_INCLUDE = [
   // Playwright's CDP transport needs Node's WebSocket implementation.
   'src/main/browser/guest-lifecycle/popups/presentation/popup-origin-chrome.electron.test.ts',
   'src/main/browser/guest-lifecycle/navigation/browser-link-materialization.electron.test.ts',
-  'src/main/browser/guest-lifecycle/popups/compatibility/browser-popup-compatibility.electron.test.ts',
   'src/main/browser/guest-lifecycle/popups/compatibility/browser-popup-native-compatibility.electron.test.ts',
   'src/main/browser/guest-lifecycle/popups/compatibility/browser-popup-background-compatibility.electron.test.ts',
   'src/main/ai-vault/scanners/devin/session-scanner-devin-db.test.ts',
diff --git a/config/scripts/workflow/source-routing/pr-package-test-paths.mjs b/config/scripts/workflow/source-routing/pr-package-test-paths.mjs
index 950cc4fa4ba..4062cc63ed3 100644
--- a/config/scripts/workflow/source-routing/pr-package-test-paths.mjs
+++ b/config/scripts/workflow/source-routing/pr-package-test-paths.mjs
@@ -129,7 +129,6 @@ export const LINUX_PACKAGE_TESTS = [
   'src/main/browser/guest-lifecycle/popups/presentation/popup-origin-chrome.electron.test.ts',
   'src/main/browser/guest-lifecycle/navigation/browser-link-materialization.electron.test.ts',
   'src/main/browser/client-pages/renderer/browser-client-page-renderer-lifecycle.electron.test.ts',
-  'src/main/browser/guest-lifecycle/popups/compatibility/browser-popup-compatibility.electron.test.ts',
   'src/main/browser/guest-lifecycle/popups/compatibility/browser-popup-native-compatibility.electron.test.ts',
   'src/main/browser/guest-lifecycle/popups/compatibility/browser-popup-background-compatibility.electron.test.ts',
   'src/main/browser/extensions/api-runtime/browser-extension-api.electron.test.ts',
diff --git a/src/main/browser/guest-lifecycle/popups/compatibility/browser-popup-compatibility.electron.test.ts b/src/main/browser/guest-lifecycle/popups/compatibility/browser-popup-compatibility.electron.test.ts
deleted file mode 100644
index 506af3c6687..00000000000
--- a/src/main/browser/guest-lifecycle/popups/compatibility/browser-popup-compatibility.electron.test.ts
+++ /dev/null
@@ -1,125 +0,0 @@
-import { describe, expect, it } from 'vitest'
-import {
-  browser,
-  closeChildren,
-  guest,
-  origin,
-  receipts,
-  status
-} from './browser-popup-compatibility-cdp-fixture'
-
-describe('hidden Chromium popup compatibility', () => {
-  it.each(['local', 'route'])(
-    'keeps POST bodies, headers, referrers and cookie jars: %s',
-    async (name) => {
-      for (const id of ['post', 'multipart', 'empty']) {
-        const before = receipts.length
-        await guest(name).locator(`#${id}`).click()
-        await expect
-          .poll(() => receipts.slice(before).find((receipt) => receipt.path === `/${id}`))
-          .toMatchObject({
-            method: 'POST',
-            referrer: `${origin}/${name}`,
-            cookie: `synthetic_session=${name}`,
-            proxied: name === 'route',
-            origin,
-            fetchSite: 'same-origin'
-          })
-        const receipt = receipts.slice(before).find((receipt) => receipt.path === `/${id}`)
-        expect(receipt?.body).toEqual(
-          id === 'post'
-            ? 'code=synthetic%2Bvalue'
-            : id === 'empty'
-              ? ''
-              : expect.stringContaining('synthetic-multipart')
-        )
-        expect(receipt?.contentType).toMatch(
-          id === 'multipart'
-            ? /^multipart\/form-data; boundary=/
-            : /^application\/x-www-form-urlencoded/
-        )
-        await closeChildren(guest(name))
-      }
-    }
-  )
-
-  it('retains remote no-gesture, stale-gesture, scheme and four-window guards', async () => {
-    const page = guest('route')
-    expect(await page.evaluate('window.open("about:blank")===null')).toBe(true)
-    await page.locator('#invalid').click()
-    expect(await page.locator('body').getAttribute('data-handle')).toBe('false')
-    await page.locator('#stale').click()
-    await expect
-      .poll(() => page.locator('body').getAttribute('data-handle'), { timeout: 4_000 })
-      .toBe('false')
-    await page.locator('#burst').click()
-    expect(await page.locator('body').getAttribute('data-handles')).toBe(
-      '[true,false,false,false,false]'
-    )
-    await closeChildren(page)
-    for (let index = 0; index < 3; index += 1) {
-      await page.locator('#blank').click()
-    }
-    await page.locator('#shift').evaluate((link) => link.setAttribute('href', '/native-owned'))
-    await page.locator('#shift').click({ modifiers: ['Shift'] })
-    await expect
-      .poll(() =>
-        browser
-          ?.contexts()
-          .flatMap((context) => context.pages())
-          .some((candidate) => candidate.url() === `${origin}/native-owned`)
-      )
-      .toBe(true)
-    const native = browser
-      ?.contexts()
-      .flatMap((context) => context.pages())
-      .find((candidate) => candidate.url() === `${origin}/native-owned`)
-    if (!native) {
-      throw new Error('Missing owned native child')
-    }
-    expect(await native.evaluate('window.open("about:blank")===null')).toBe(true)
-    await page.evaluate('window.livePopup=window.popup')
-    expect(await page.locator('body').getAttribute('data-handle')).toBe('true')
-    await page.locator('#blank').click()
-    expect(await page.locator('body').getAttribute('data-handle')).toBe('false')
-    expect(status().blocked.length).toBeGreaterThanOrEqual(7)
-    expect(status().windowsHidden).toBe(true)
-    expect(await page.evaluate('Notification.requestPermission()')).toBe('denied')
-    await page.evaluate('console.log("orca-popup-fixture:fence")')
-    await expect.poll(() => status().routeGranted).toBe(false)
-    await expect.poll(() => page.evaluate('window.livePopup.closed')).toBe(true)
-    await expect.poll(() => native.isClosed()).toBe(true)
-    await page.locator('#blank').click()
-    expect(await page.locator('body').getAttribute('data-handle')).toBe('false')
-    await page.evaluate('console.log("orca-popup-fixture:grant")')
-    await expect.poll(() => status().routeGranted).toBe(true)
-    await page.locator('#blank').click()
-    expect(await page.locator('body').getAttribute('data-handle')).toBe('true')
-    const child = browser
-      ?.contexts()
-      .flatMap((context) => context.pages())
-      .find((candidate) => candidate.url() === 'about:blank#state')
-    if (!child) {
-      throw new Error('Missing child for opener-close check')
-    }
-    await page.locator('#shift').click({ modifiers: ['Shift'] })
-    await expect
-      .poll(() =>
-        browser
-          ?.contexts()
-          .flatMap((context) => context.pages())
-          .some((candidate) => candidate.url() === `${origin}/native-owned`)
-      )
-      .toBe(true)
-    const regrantedNative = browser
-      ?.contexts()
-      .flatMap((context) => context.pages())
-      .find((candidate) => candidate.url() === `${origin}/native-owned`)
-    if (!regrantedNative) {
-      throw new Error('Missing regranted native child')
-    }
-    await page.evaluate('console.log("orca-popup-fixture:close")')
-    await expect.poll(() => child.isClosed()).toBe(true)
-    await expect.poll(() => regrantedNative.isClosed()).toBe(true)
-  })
-})
diff --git a/src/main/native-chat/agent-session-journal/history-import/journal-pi-context-import.spec.ts b/src/main/native-chat/agent-session-journal/history-import/journal-pi-context-import.spec.ts
index 2afb48e405f..df7700a83b1 100644
--- a/src/main/native-chat/agent-session-journal/history-import/journal-pi-context-import.spec.ts
+++ b/src/main/native-chat/agent-session-journal/history-import/journal-pi-context-import.spec.ts
@@ -1,8 +1,7 @@
 import { mkdtemp, rm, writeFile } from 'node:fs/promises'
 import { tmpdir } from 'node:os'
 import { join } from 'node:path'
-import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
-import Database from '../../../sqlite/sync-database'
+import { afterEach, beforeEach, describe, expect, it } from 'vitest'
 import { prepareLegacyTranscriptImport } from './journal-legacy-import'
 import { createTrackedJournalOpener } from '../store-lifecycle/journal-host-database-test-support'
 import './journal-pi-active-branch'
@@ -40,36 +39,6 @@ export function registerJournalPiContextImportTests(): void {
   }
 
   describe('saved Pi context import', () => {
-    it('keeps prepared history when temporary database teardown reports an error', async () => {
-      const close = Database.prototype.close
-      const closeSpy = vi.spyOn(Database.prototype, 'close').mockImplementation(function (
-        this: Database.Database
-      ) {
-        close.call(this)
-        throw new Error('test teardown failure')
-      })
-      const warn = vi.spyOn(console, 'warn').mockImplementation(() => undefined)
-      try {
-        const items = await prepare([
-          {
-            type: 'message',
-            id: 'first',
-            parentId: null,
-            message: { role: 'user', content: 'hello' }
-          }
-        ])
-        expect(items).toHaveLength(1)
-        expect(items[0]?.identity).toMatchObject({ provider: 'legacy', recordId: 'first' })
-        expect(warn).toHaveBeenCalledWith(
-          '[journal-pi-import] temporary database close failed:',
-          expect.objectContaining({ message: 'test teardown failure' })
-        )
-      } finally {
-        closeSpy.mockRestore()
-        warn.mockRestore()
-      }
-    })
-
     it.each(PI_CONTEXT_FIXTURES)('$name', async (fixture) => {
       const items = await prepare(fixture.entries, 'version' in fixture ? fixture.version : 3)
       expect(
diff --git a/src/main/plugins/workers/host-api/plugin-host-project-visibility.test.ts b/src/main/plugins/workers/host-api/plugin-host-project-visibility.test.ts
deleted file mode 100644
index efda2025aa2..00000000000
--- a/src/main/plugins/workers/host-api/plugin-host-project-visibility.test.ts
+++ /dev/null
@@ -1,142 +0,0 @@
-import { describe, expect, it, vi } from 'vitest'
-import type { PluginCapabilityKind } from '../../../../shared/plugins/capabilities/plugin-capabilities'
-import { PluginRuntimeRpcError } from '../../plugin-runtime-rpc'
-import { callPluginHost, pluginHostTestServices } from './__mocks__/plugin-host-services-fixture'
-import type { PluginRuntimeRpc } from './plugin-host-runtime-call'
-
-const REPOS = {
-  repos: [
-    { id: 'r1', displayName: 'App', path: '/src/app', executionHostId: 'local' },
-    { id: 'gone', displayName: 'Old', path: '/src/old', executionHostId: 'local', hiddenAt: 5 },
-    { id: 'twin', displayName: 'Twin', path: '/l/twin', executionHostId: 'local' },
-    { id: 'twin', displayName: 'Twin', path: '/r/twin', connectionId: 'box', hiddenAt: 'x' }
-  ]
-}
-
-function runtime(answers: Record<string, unknown> = {}) {
-  const all: Record<string, unknown> = {
-    'repo.list': REPOS,
-    'repo.setHidden': (params: { repoHostId: string; hidden: boolean }) => ({
-      repo: {},
-      hostId: params.repoHostId,
-      hidden: params.hidden
-    }),
-    ...answers
-  }
-  return vi.fn<PluginRuntimeRpc>(async (method, params) => {
-    const answer = all[method]
-    if (answer instanceof Error) {
-      throw answer
-    }
-    return typeof answer === 'function' ? answer(params) : answer
-  })
-}
-
-const call = (
-  method: string,
-  params: unknown,
-  rpc: PluginRuntimeRpc,
-  granted: PluginCapabilityKind[] = ['workspace:write', 'workspace:read'],
-  audit = { record: vi.fn().mockResolvedValue(undefined) }
-) => callPluginHost({ method, params, granted, services: pluginHostTestServices(rpc), audit })
-
-const setHiddenParams = (rpc: ReturnType<typeof runtime>) =>
-  rpc.mock.calls.filter(([name]) => name === 'repo.setHidden').map(([, params]) => params)
-
-describe('project.setHidden', () => {
-  it("hides one host's copy by id, host-qualified even when the plugin names no host", async () => {
-    const rpc = runtime()
-    const audit = { record: vi.fn().mockResolvedValue(undefined) }
-    expect(
-      await call('project.setHidden', { projectId: 'r1', hidden: true }, rpc, undefined, audit)
-    ).toEqual({ ok: true, value: { hostId: 'local', hidden: true } })
-    expect(
-      await call('project.setHidden', { projectId: 'twin', hostId: 'ssh:box', hidden: false }, rpc)
-    ).toEqual({ ok: true, value: { hostId: 'ssh:box', hidden: false } })
-    expect(setHiddenParams(rpc)).toEqual([
-      { repo: 'id:r1', repoHostId: 'local', hidden: true },
-      { repo: 'id:twin', repoHostId: 'ssh:box', hidden: false }
-    ])
-    // Ids only: no project name or path reaches the audit log.
-    expect(JSON.stringify(audit.record.mock.calls)).toContain('project=r1 host=any hidden=true')
-    expect(JSON.stringify(audit.record.mock.calls)).not.toContain('/src/app')
-  })
-
-  it('refuses an unknown project, or a twin without hostId, before changing anything', async () => {
-    const rpc = runtime()
-    const outcomes = await Promise.all([
-      call('project.setHidden', { projectId: 'twin', hidden: true }, rpc),
-      call('project.setHidden', { projectId: 'nope', hidden: true }, rpc),
-      call('project.setHidden', { projectId: 'r1', hostId: 'ssh:box', hidden: true }, rpc)
-    ])
-    expect(outcomes).toEqual([
-      {
-        ok: false,
-        code: 'action_failed',
-        error: 'two hosts have this project; pass the hostId project.list gives'
-      },
-      { ok: false, code: 'action_failed', error: 'no project has this id' },
-      { ok: false, code: 'action_failed', error: 'no project has this id' }
-    ])
-    expect(setHiddenParams(rpc)).toEqual([])
-  })
-
-  it('needs workspace:write and takes no name or path selector', async () => {
-    const rpc = runtime()
-    expect(
-      await call('project.setHidden', { projectId: 'r1', hidden: true }, rpc, ['workspace:read'])
-    ).toMatchObject({ ok: false, code: 'capability_denied' })
-    expect(
-      await call('project.setHidden', { projectId: 'r1', path: '/src/app', hidden: true }, rpc)
-    ).toMatchObject({ ok: false, code: 'invalid_params' })
-    expect(await call('project.setHidden', { projectId: 'r1' }, rpc)).toMatchObject({
-      ok: false,
-      code: 'invalid_params'
-    })
-    expect(rpc).not.toHaveBeenCalled()
-  })
-
-  it('maps runtime refusals and a host that drops the field to fixed messages', async () => {
-    const removed = runtime({
-      'repo.setHidden': new PluginRuntimeRpcError('runtime_error', 'repo_not_found')
-    })
-    const older = runtime({ 'repo.setHidden': { repo: {} } })
-    const disconnected = runtime({
-      'repo.setHidden': new PluginRuntimeRpcError('runtime_unavailable', 'ssh box offline at /x')
-    })
-    expect(
-      await Promise.all(
-        [removed, older, disconnected].map((rpc) =>
-          call('project.setHidden', { projectId: 'r1', hidden: true }, rpc)
-        )
-      )
-    ).toEqual([
-      { ok: false, code: 'action_failed', error: 'no project has this id' },
-      {
-        ok: false,
-        code: 'action_failed',
-        error: "this project's host could not change it; it may need an Orca update"
-      },
-      {
-        ok: false,
-        code: 'unavailable',
-        error: 'this Orca host cannot run workspace actions now'
-      }
-    ])
-  })
-})
-
-describe('project.list', () => {
-  it('marks hidden copies, reading a malformed hiddenAt as shown', async () => {
-    const outcome = await call('project.list', undefined, runtime())
-    expect(outcome.ok && outcome.value).toMatchObject({
-      projects: [
-        { id: 'r1', hostId: 'local', hidden: false },
-        { id: 'gone', hostId: 'local', hidden: true },
-        { id: 'twin', hostId: 'local', hidden: false },
-        { id: 'twin', hostId: 'ssh:box', hidden: false }
-      ],
-      truncated: false
-    })
-  })
-})