fix: restore the Agents window — stop gating the de-brand on Setup.hidden

REGRESSION, shipped in v0.6.0 + v0.7.0. My B4 de-brand (#12) forced
IChatEntitlementService.setForceHidden(true) to hide the "Sign in to use GitHub
Copilot" call-to-actions. I read Setup.hidden as "the Copilot setup CTA gate".
It is not — it is upstream's hide-ALL-chat/agent-UI flag, and forcing it also
hid:

  - OPEN_AGENTS_WINDOW_PRECONDITION (chat/common/constants.ts) → "Open Agents
    Window" vanished from the Command Palette, making the whole Agents window
    (and the aquarium easter egg inside it) unreachable;
  - the Agent Plugins view + its menus/actions (agentPluginsView.ts ×6);
  - chat participants, createPluginAction, chatPluginActions, chatActions,
    agent-sessions experiments.

Every other term of that precondition passes (chat.agent.enabled defaults true;
the window/auxiliary checks pass in the main window) — Setup.hidden.negate() was
the only failing term, so this was solely self-inflicted.

Fix:
  - REMOVE the setForceHidden contribution → Setup.hidden returns to its default
    (false) and every surface above comes back. chat.shared.contribution.ts is
    pristine again and leaves the patch.
  - Hide the two CTAs at the MENU ITEM instead — `when: ContextKeyExpr.false()`
    on the Accounts-menu and title-bar entries (the same item-scoped pattern used
    for "Ask @VScode", which has no blast radius). Drops two imports that this
    orphans (strict build: TS6133).

Patch stays at 11 files (chat.shared out, chatSetupContributions in).
npm run compile-client → 0 errors. de-brand → 0 warnings.

Known remainder: the chat STATUS-BAR dashboard still offers "Sign in to use
GitHub Copilot" (chatStatusDashboard.ts) — it is created behind
`!sentiment.hidden`, i.e. the same Setup.hidden flag, so hiding it needs a
different, narrower gate. Tracked separately rather than re-breaking the window.

Lesson recorded in docs/CORE-PATCHES.md row 11: never gate a de-brand on
Setup.hidden — gate the item.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: ndemianc

docs/CORE-PATCHES.md

@@ -37,7 +37,7 @@ git -C vscode diff HEAD -- \
   src/vs/workbench/contrib/welcomeWalkthrough/browser/walkThrough.contribution.ts \
   src/vs/workbench/contrib/welcomeOnboarding/browser/welcomeOnboarding.contribution.ts \
   src/vs/workbench/api/node/loopbackServer.ts \
-  src/vs/workbench/contrib/chat/browser/chat.shared.contribution.ts \
+  src/vs/workbench/contrib/chat/browser/chatSetup/chatSetupContributions.ts \
   > patches/levelcode-core.patch
 # NOTE 1: use `diff HEAD` (not plain `diff`) — bootstrap's `git apply` may leave these STAGED,
 # and plain `git diff` shows only UNSTAGED changes, silently dropping the staged patches.
@@ -72,7 +72,7 @@ compile-client` after touching a core file.**
 | 8 | `welcomeWalkthrough/browser/walkThrough.contribution.ts` | **Remove** the "**Editor Playground**" action registration + Help item + their now-unused imports (`registerAction2`, `MenuRegistry`, `MenuId`, `EditorWalkThroughAction`). | De-brand (WS-C/M5). Its walkthrough is verbatim Microsoft VS Code content. Clean full removal (no leftover unused imports). |
 | 9 | `welcomeOnboarding/browser/welcomeOnboarding.contribution.ts` | Developer command **"Welcome Onboarding 2026"** → `f1: false`. | De-brand (WS-A/B3). That command calls `onboardingService.show()`, which renders the verbatim **"Welcome to VS Code — Sign in to use GitHub Copilot"** modal. Patch #4 blocks it on *first run*; this hides the one remaining Command-Palette path to it. `f1:false` (not removal) keeps the action + its imports used. |
 | 10 | `api/node/loopbackServer.ts` (`getHtml`) | Replace the `this._appName === 'Visual Studio Code'` / `'… - Insiders'` branches (which embedded the VS Code stable/Insiders **shields**, falling through to the blue VS Code **"book"** default) with a single **LevelCode chevron** data-URI. | De-brand (WS-C/L5). A latent bug **and** a leak: `appName` is now "LevelCode" so no branch matched → every GitHub OAuth success page flashed a VS Code logo. `this._appName` is still used in the page text, so no unused-field error. |
-| 11 | `chat/browser/chat.shared.contribution.ts` | Add a `WorkbenchPhase.BlockRestore` contribution that calls `IChatEntitlementService.setForceHidden(true)`. | De-brand (WS-A/B4). `product.defaultChatAgent` is kept (assertDefined-d, ~15 files), which leaves `Setup.hidden=false` → a signed-out user sees "Sign in to use GitHub Copilot" CTAs in the Accounts menu, title bar, and Chat status. `setForceHidden(true)` flips **only** that gate — it does **not** disable AI/inline suggestions or suppress LevelCode's own AI-panel auto-open, unlike `chat.disableAIFeatures:true` (`layout.ts` first-run). No new imports (file already imports `registerWorkbenchContribution2` + `IChatEntitlementService`). |
+| 11 | `chat/browser/chatSetup/chatSetupContributions.ts` | **Hide** the two GitHub Copilot sign-in call-to-actions (Accounts menu + title bar) with `when: ContextKeyExpr.false()`, and drop the two imports that becomes unused (`ChatEntitlementContextKeys`, `InEditorZenModeContext` — strict build). | De-brand (WS-A/B4). A sign-in funnel for an extension we don't ship. **Gated per MENU ITEM on purpose.** The previous attempt forced `IChatEntitlementService.setForceHidden(true)` instead — but `Setup.hidden` is upstream's *hide-ALL-chat/agent-UI* flag, not a CTA gate: it also gates `OPEN_AGENTS_WINDOW_PRECONDITION` (constants.ts), the **Agent Plugins view**, chat participants and several chat/plugin actions. That shipped in v0.6.0–v0.7.0 and made **Open Agents Window disappear from the Command Palette**. Never gate a de-brand on `Setup.hidden`; gate the item. |
 
 ## String + link rebrands — `scripts/de-brand.mjs` (NOT in the patch)
 

patches/levelcode-core.patch

@@ -95,32 +95,63 @@ index 8251c4a4..d2da153b 100644
  });
 
  // --- Actions Registration
-diff --git a/src/vs/workbench/contrib/chat/browser/chat.shared.contribution.ts b/src/vs/workbench/contrib/chat/browser/chat.shared.contribution.ts
-index 883dab9e..99861bde 100644
---- a/src/vs/workbench/contrib/chat/browser/chat.shared.contribution.ts
-+++ b/src/vs/workbench/contrib/chat/browser/chat.shared.contribution.ts
-@@ -2440,6 +2440,21 @@ registerWorkbenchContribution2(ChatSlashCommandsContribution.ID, ChatSlashComman
- registerWorkbenchContribution2(ChatSessionOptionSlashCommandsContribution.ID, ChatSessionOptionSlashCommandsContribution, WorkbenchPhase.Eventually);
- 
- registerWorkbenchContribution2(ChatExtensionPointHandler.ID, ChatExtensionPointHandler, WorkbenchPhase.BlockStartup);
-+
-+// [LevelCode] Hide the GitHub Copilot sign-in call-to-actions. product.json keeps `defaultChatAgent`
-+// (it is assertDefined-d and consumed across ~15 core files, so it can't be removed), which leaves
-+// ChatEntitlement's Setup.hidden = false — so a signed-out user still sees "Sign in to use GitHub
-+// Copilot" in the Accounts menu, the title bar, and the Chat status dashboard: a dead funnel for an
-+// extension LevelCode does not ship. setForceHidden(true) flips ONLY that Setup.hidden gate. Unlike
-+// `chat.disableAIFeatures: true`, it does not disable AI/inline suggestions and does not suppress the
-+// secondary-sidebar auto-open where LevelCode's own AI panel lives (layout.ts first-run behaviour).
-+class LevelCodeHideCopilotSetupContribution implements IWorkbenchContribution {
-+	static readonly ID = 'workbench.contrib.levelcode.hideCopilotSetup';
-+	constructor(@IChatEntitlementService chatEntitlementService: IChatEntitlementService) {
-+		chatEntitlementService.setForceHidden(true);
-+	}
-+}
-+registerWorkbenchContribution2(LevelCodeHideCopilotSetupContribution.ID, LevelCodeHideCopilotSetupContribution, WorkbenchPhase.BlockRestore);
- registerWorkbenchContribution2(LanguageModelToolsExtensionPointHandler.ID, LanguageModelToolsExtensionPointHandler, WorkbenchPhase.BlockRestore);
- registerWorkbenchContribution2(ChatPromptFilesExtensionPointHandler.ID, ChatPromptFilesExtensionPointHandler, WorkbenchPhase.BlockRestore);
- registerWorkbenchContribution2(ChatCompatibilityNotifier.ID, ChatCompatibilityNotifier, WorkbenchPhase.Eventually);
+diff --git a/src/vs/workbench/contrib/chat/browser/chatSetup/chatSetupContributions.ts b/src/vs/workbench/contrib/chat/browser/chatSetup/chatSetupContributions.ts
+index ac91175c..883a7ed6 100644
+--- a/src/vs/workbench/contrib/chat/browser/chatSetup/chatSetupContributions.ts
++++ b/src/vs/workbench/contrib/chat/browser/chatSetup/chatSetupContributions.ts
+@@ -38,13 +38,12 @@ import { ITelemetryService } from '../../../../../platform/telemetry/common/tele
+ import { ToggleTitleBarConfigAction } from '../../../../browser/parts/titlebar/titlebarActions.js';
+ import { IWorkbenchContribution } from '../../../../common/contributions.js';
+ import { IViewDescriptorService, ViewContainerLocation } from '../../../../common/views.js';
+-import { ChatEntitlement, ChatEntitlementContext, ChatEntitlementContextKeys, ChatEntitlementRequests, ChatEntitlementService, IChatEntitlementService, isProUser } from '../../../../services/chat/common/chatEntitlementService.js';
++import { ChatEntitlement, ChatEntitlementContext, ChatEntitlementRequests, ChatEntitlementService, IChatEntitlementService, isProUser } from '../../../../services/chat/common/chatEntitlementService.js';
+ import { EnablementState, IWorkbenchExtensionEnablementService } from '../../../../services/extensionManagement/common/extensionManagement.js';
+ import { ExtensionUrlHandlerOverrideRegistry, IExtensionUrlHandlerOverride } from '../../../../services/extensions/browser/extensionUrlHandler.js';
+ import { IExtensionService } from '../../../../services/extensions/common/extensions.js';
+ import { IHostService } from '../../../../services/host/browser/host.js';
+ import { IWorkbenchLayoutService, Parts } from '../../../../services/layout/browser/layoutService.js';
+-import { InEditorZenModeContext } from '../../../../common/contextkeys.js';
+ import { ILifecycleService } from '../../../../services/lifecycle/common/lifecycle.js';
+ import { IPreferencesService } from '../../../../services/preferences/common/preferences.js';
+ import { IExtension, IExtensionsWorkbenchService } from '../../../extensions/common/extensions.js';
+@@ -367,12 +366,10 @@ export class ChatSetupContribution extends Disposable implements IWorkbenchContr
+ 					menu: {
+ 						id: MenuId.AccountsContext,
+ 						group: '2_copilot',
+-						when: ContextKeyExpr.and(
+-							ChatContextKeys.Setup.hidden.negate(),
+-							ChatContextKeys.Setup.disabledInWorkspace.negate(),
+-							ChatContextKeys.Setup.completed.negate(),
+-							ChatContextKeys.Entitlement.signedOut
+-						)
++						// [LevelCode] Hidden: a GitHub Copilot sign-in funnel for an extension we do not ship. Gated on
++						// THIS MENU ITEM, deliberately not via ChatEntitlement's Setup.hidden — that flag also gates the
++						// Agents window, the Agent Plugins view and chat participants, and forcing it hid all of them.
++						when: ContextKeyExpr.false()
+ 					}
+ 				});
+ 			}
+@@ -399,16 +396,10 @@ export class ChatSetupContribution extends Disposable implements IWorkbenchContr
+ 					menu: [{
+ 						id: MenuId.TitleBarAdjacentCenter,
+ 						order: 0, // same position as the update button
+-						when: ContextKeyExpr.and(
+-							IsWebContext.negate(),
+-							ChatContextKeys.Entitlement.signedOut,
+-							ChatEntitlementContextKeys.hasByokModels.negate(),
+-							ChatContextKeys.Setup.hidden.negate(),
+-							ChatContextKeys.Setup.disabledInWorkspace.negate(),
+-							ContextKeyExpr.equals(`config.${ChatConfiguration.TitleBarSignInEnabled}`, true),
+-							ContextKeyExpr.has('updateTitleBar').negate(),
+-							InEditorZenModeContext.negate(),
+-						),
++						// [LevelCode] Hidden: a GitHub Copilot sign-in funnel for an extension we do not ship. Gated on
++						// THIS MENU ITEM, deliberately not via ChatEntitlement's Setup.hidden — that flag also gates the
++						// Agents window, the Agent Plugins view and chat participants, and forcing it hid all of them.
++						when: ContextKeyExpr.false(),
+ 					}]
+ 				});
+ 			}
 diff --git a/src/vs/workbench/contrib/files/browser/files.contribution.ts b/src/vs/workbench/contrib/files/browser/files.contribution.ts
 index 574c2d8e..f6b8c7af 100644
 --- a/src/vs/workbench/contrib/files/browser/files.contribution.ts