feat(cli): add slashCommands.disabled setting to gate slash commands (#3445)

* feat(cli): add slashCommands.disabled setting to gate slash commands

Introduces a first-class way for operators to hide and refuse to execute
specific slash commands. Useful for multi-tenant / enterprise / sandboxed
deployments where different users should see different command subsets.

The denylist is sourced from three unioned inputs:

  * `slashCommands.disabled` settings key (string[], UNION merge), so
    workspace scopes can only add to a denylist set at user or system
    scope, never shrink it — matching the shape already used by
    `permissions.deny`.
  * `--disabled-slash-commands` CLI flag (comma-separated or repeated).
  * `QWEN_DISABLED_SLASH_COMMANDS` environment variable.

Matching is case-insensitive against the final (post-rename) command
name, so extension commands are addressable by their disambiguated
form (e.g. `firebase.deploy`). Disabled commands are removed from
`CommandService`'s output, so they disappear from autocomplete and
produce the standard unknown-command path in both interactive TUI and
non-interactive (`--prompt`) modes.

The scope of this change is slash commands only: it does not affect
tool permissions (still `permissions.deny`) or keyboard shortcuts.

* chore(cli): regenerate settings.schema.json for slashCommands.disabled

Regenerates the companion JSON schema consumed by the VS Code extension
after adding the `slashCommands.disabled` entry to the TS schema in the
previous commit. Required by the "Check settings schema is up-to-date"
CI lint step.

* fix(cli): route disabled slash commands to unsupported, not no_command

handleSlashCommand was passing the disabled denylist straight into
CommandService.create, so disabled commands disappeared from
`allCommands` too. The fallback existence check that distinguishes
"known but not allowed in non-interactive mode" from "truly unknown"
then failed, and disabled commands like `/help` fell through to
`no_command` — causing the caller to forward them to the model as
plain prompt text.

Keep `allCommands` unfiltered and apply the denylist only when
constructing the executable set and when producing the unsupported
response. A disabled command now returns `unsupported` with a
"disabled by the current configuration" reason and never reaches the
model. Added three regression tests covering the primary case,
case-insensitive match, and the preserved no_command path for
genuinely unknown input.

Author: ihubanov

docs/users/configuration/settings.md

@@ -106,6 +106,7 @@ export async function handleQwenAuth(
       maxSessionTurns: undefined,
       coreTools: undefined,
       excludeTools: undefined,
+      disabledSlashCommands: undefined,
       authType: undefined,
       channel: undefined,
       systemPrompt: undefined,

packages/cli/src/commands/auth/handler.ts

@@ -160,6 +160,7 @@ export interface CliArgs {
   maxSessionTurns: number | undefined;
   coreTools: string[] | undefined;
   excludeTools: string[] | undefined;
+  disabledSlashCommands: string[] | undefined;
   authType: string | undefined;
   channel: string | undefined;
   jsonFd?: number | undefined;
@@ -530,6 +531,17 @@ export async function parseArguments(): Promise<CliArgs> {
           coerce: (tools: string[]) =>
             tools.flatMap((tool) => tool.split(',').map((t) => t.trim())),
         })
+        .option('disabled-slash-commands', {
+          type: 'array',
+          string: true,
+          description:
+            'Slash command names to hide/disable (comma-separated or ' +
+            'repeated). Merged with the `slashCommands.disabled` setting ' +
+            'and QWEN_DISABLED_SLASH_COMMANDS. Matched case-insensitively ' +
+            'against the final command name.',
+          coerce: (names: string[]) =>
+            names.flatMap((n) => n.split(',').map((t) => t.trim())),
+        })
         .option('auth-type', {
           type: 'string',
           choices: [
@@ -926,6 +938,29 @@ export async function loadCliConfig(
     if (t && !mergedDeny.includes(t)) mergedDeny.push(t);
   }
 
+  // Merge the slash-command denylist from settings + CLI flag + env var.
+  // Settings merge (UNION across scopes) is already handled upstream; we
+  // only de-duplicate while preserving case for diagnostic purposes.
+  const disabledSlashCommands: string[] = [];
+  const seenDisabled = new Set<string>();
+  const addDisabled = (value: string | undefined) => {
+    if (!value) return;
+    const trimmed = value.trim();
+    if (!trimmed) return;
+    const key = trimmed.toLowerCase();
+    if (!seenDisabled.has(key)) {
+      seenDisabled.add(key);
+      disabledSlashCommands.push(trimmed);
+    }
+  };
+  for (const name of settings.slashCommands?.disabled ?? []) addDisabled(name);
+  for (const name of argv.disabledSlashCommands ?? []) addDisabled(name);
+  for (const name of (process.env['QWEN_DISABLED_SLASH_COMMANDS'] ?? '').split(
+    ',',
+  )) {
+    addDisabled(name);
+  }
+
   // Helper: check if a tool is explicitly covered by an allow rule OR by the
   // coreTools whitelist. Uses alias matching for coreTools (via isToolEnabled)
   // to preserve the original behaviour where "ShellTool", "Shell", and
@@ -1093,6 +1128,8 @@ export async function loadCliConfig(
       ? argv.allowedTools || undefined
       : argv.allowedTools || settings.tools?.allowed || undefined,
     excludeTools: mergedDeny,
+    disabledSlashCommands:
+      disabledSlashCommands.length > 0 ? disabledSlashCommands : undefined,
     // New unified permissions (PermissionManager source of truth).
     permissions: {
       allow: mergedAllow.length > 0 ? mergedAllow : undefined,

packages/cli/src/config/config.ts

@@ -954,6 +954,34 @@ describe('Settings Loading and Merging', () => {
       expect(settings.merged.advanced?.excludedEnvVars).toHaveLength(2);
     });
 
+    it('should UNION-merge slashCommands.disabled across user and workspace scopes', () => {
+      (mockFsExistsSync as Mock).mockReturnValue(true);
+      const userSettings = {
+        slashCommands: { disabled: ['auth', 'quit'] },
+      };
+      const workspaceSettings = {
+        // Workspace overlaps with user and adds one entry. UNION de-dupes the
+        // overlap and merges the new entry; it cannot remove user entries.
+        slashCommands: { disabled: ['quit', 'clear'] },
+      };
+
+      (fs.readFileSync as Mock).mockImplementation(
+        (p: fs.PathOrFileDescriptor) => {
+          if (p === USER_SETTINGS_PATH) return JSON.stringify(userSettings);
+          if (p === MOCK_WORKSPACE_SETTINGS_PATH)
+            return JSON.stringify(workspaceSettings);
+          return '{}';
+        },
+      );
+
+      const settings = loadSettings(MOCK_WORKSPACE_DIR);
+      const disabled = settings.merged.slashCommands?.disabled ?? [];
+      expect(disabled).toEqual(
+        expect.arrayContaining(['auth', 'quit', 'clear']),
+      );
+      expect(disabled).toHaveLength(3);
+    });
+
     it('should merge all settings files with the correct precedence', () => {
       (mockFsExistsSync as Mock).mockReturnValue(true);
       const systemDefaultsContent = {

packages/cli/src/config/settings.test.ts

@@ -1151,6 +1151,36 @@ const SETTINGS_SCHEMA = {
     },
   },
 
+  slashCommands: {
+    type: 'object',
+    label: 'Slash Commands',
+    category: 'Advanced',
+    requiresRestart: true,
+    default: {},
+    description:
+      'Configuration for slash commands exposed by the CLI. Useful for ' +
+      'locking down the command surface in multi-tenant or enterprise ' +
+      'deployments.',
+    showInDialog: false,
+    properties: {
+      disabled: {
+        type: 'array',
+        label: 'Disabled Slash Commands',
+        category: 'Advanced',
+        requiresRestart: true,
+        default: undefined as string[] | undefined,
+        description:
+          'Slash command names to hide and refuse to execute. Matched ' +
+          'case-insensitively against the final command name (for extension ' +
+          'commands this is the disambiguated form, e.g. "myext.deploy"). ' +
+          'Merged as a union across settings scopes, so workspace settings ' +
+          'can add to but not remove entries defined in system/user settings.',
+        showInDialog: false,
+        mergeStrategy: MergeStrategy.UNION,
+      },
+    },
+  },
+
   tools: {
     type: 'object',
     label: 'Tools',

packages/cli/src/config/settingsSchema.ts

@@ -607,6 +607,7 @@ describe('gemini.tsx main function kitty protocol', () => {
       resume: undefined,
       coreTools: undefined,
       excludeTools: undefined,
+      disabledSlashCommands: undefined,
       authType: undefined,
       maxSessionTurns: undefined,
       experimentalLsp: undefined,

packages/cli/src/gemini.test.tsx

@@ -151,6 +151,7 @@ describe('runNonInteractive', () => {
         setRegisterCallback: vi.fn(),
         getRunning: vi.fn().mockReturnValue([]),
       }),
+      getDisabledSlashCommands: vi.fn().mockReturnValue([]),
     } as unknown as Config;
 
     mockSettings = {

packages/cli/src/nonInteractiveCli.test.ts

@@ -36,6 +36,7 @@ describe('handleSlashCommand', () => {
       getFolderTrustFeature: vi.fn().mockReturnValue(false),
       getFolderTrust: vi.fn().mockReturnValue(false),
       getProjectRoot: vi.fn().mockReturnValue('/test/project'),
+      getDisabledSlashCommands: vi.fn().mockReturnValue([]),
       storage: {},
     } as unknown as Config;
 
@@ -122,6 +123,68 @@ describe('handleSlashCommand', () => {
     }
   });
 
+  it('should return unsupported (not no_command) for a disabled command so it is not forwarded to the model', async () => {
+    const mockInitCommand = {
+      name: 'init',
+      description: 'Initialize project',
+      kind: CommandKind.BUILT_IN,
+      action: vi.fn(),
+    };
+    mockGetCommands.mockReturnValue([mockInitCommand]);
+    vi.mocked(mockConfig.getDisabledSlashCommands).mockReturnValue(['init']);
+
+    const result = await handleSlashCommand(
+      '/init',
+      abortController,
+      mockConfig,
+      mockSettings,
+      ['init'], // Would normally be allowed; denylist must still block it.
+    );
+
+    expect(result.type).toBe('unsupported');
+    if (result.type === 'unsupported') {
+      expect(result.reason).toContain('/init');
+      expect(result.reason).toContain('disabled');
+    }
+    expect(mockInitCommand.action).not.toHaveBeenCalled();
+  });
+
+  it('should match disabled names case-insensitively', async () => {
+    const mockInitCommand = {
+      name: 'init',
+      description: 'Initialize project',
+      kind: CommandKind.BUILT_IN,
+      action: vi.fn(),
+    };
+    mockGetCommands.mockReturnValue([mockInitCommand]);
+    vi.mocked(mockConfig.getDisabledSlashCommands).mockReturnValue(['INIT']);
+
+    const result = await handleSlashCommand(
+      '/init',
+      abortController,
+      mockConfig,
+      mockSettings,
+      ['init'],
+    );
+
+    expect(result.type).toBe('unsupported');
+    expect(mockInitCommand.action).not.toHaveBeenCalled();
+  });
+
+  it('should still return no_command for truly unknown slash commands even when a denylist is set', async () => {
+    mockGetCommands.mockReturnValue([]);
+    vi.mocked(mockConfig.getDisabledSlashCommands).mockReturnValue(['help']);
+
+    const result = await handleSlashCommand(
+      '/does-not-exist',
+      abortController,
+      mockConfig,
+      mockSettings,
+    );
+
+    expect(result.type).toBe('no_command');
+  });
+
   it('should execute allowed built-in commands', async () => {
     const mockInitCommand = {
       name: 'init',

packages/cli/src/nonInteractiveCliCommands.test.ts

@@ -254,8 +254,19 @@ export const handleSlashCommand = async (
       : 'non_interactive';
 
   const allowedBuiltinSet = new Set(allowedBuiltinCommandNames ?? []);
+  const disabledSlashCommandsRaw = config.getDisabledSlashCommands();
+  const disabledNameSet = new Set<string>();
+  for (const name of disabledSlashCommandsRaw) {
+    const trimmed = name.trim();
+    if (trimmed) disabledNameSet.add(trimmed.toLowerCase());
+  }
+  const isDisabled = (cmd: { name: string }) =>
+    disabledNameSet.has(cmd.name.toLowerCase());
 
-  // Load all commands to check if the command exists but is not allowed
+  // Load the full command set (unfiltered by the denylist) so that the
+  // fallback existence check below can distinguish a disabled command from a
+  // truly unknown one. Without this, a disabled command would fall through to
+  // `no_command` and be forwarded to the model as plain prompt text.
   const allLoaders = [
     new BuiltinCommandLoader(config),
     new BundledSkillLoader(config),
@@ -270,7 +281,7 @@ export const handleSlashCommand = async (
   const filteredCommands = filterCommandsForNonInteractive(
     allCommands,
     allowedBuiltinSet,
-  );
+  ).filter((cmd) => !isDisabled(cmd));
 
   // First, try to parse with filtered commands
   const { commandToExecute, args } = parseSlashCommand(
@@ -286,6 +297,16 @@ export const handleSlashCommand = async (
     );
 
     if (knownCommand) {
+      if (isDisabled(knownCommand)) {
+        return {
+          type: 'unsupported',
+          reason: t(
+            'The command "/{{command}}" is disabled by the current configuration.',
+            { command: knownCommand.name },
+          ),
+          originalType: 'filtered_command',
+        };
+      }
       // Command exists but is not allowed in non-interactive mode
       return {
         type: 'unsupported',
@@ -380,7 +401,14 @@ export const getAvailableCommands = async (
           ]
         : [new BundledSkillLoader(config), new FileCommandLoader(config)];
 
-    const commandService = await CommandService.create(loaders, abortSignal);
+    const disabledSlashCommands = config.getDisabledSlashCommands();
+    const commandService = await CommandService.create(
+      loaders,
+      abortSignal,
+      disabledSlashCommands.length > 0
+        ? new Set(disabledSlashCommands)
+        : undefined,
+    );
     const commands = commandService.getCommands();
     const filteredCommands = filterCommandsForNonInteractive(
       commands,

packages/cli/src/nonInteractiveCliCommands.ts

@@ -310,6 +310,80 @@ describe('CommandService', () => {
     expect(deployExtension?.description).toBe('[gcp] Deploy to Google Cloud');
   });
 
+  describe('disabledNames filtering', () => {
+    it('should omit commands whose names are in the disabled set', async () => {
+      const loader = new MockCommandLoader([
+        mockCommandA,
+        mockCommandB,
+        mockCommandC,
+      ]);
+      const service = await CommandService.create(
+        [loader],
+        new AbortController().signal,
+        new Set(['command-b']),
+      );
+      const names = service.getCommands().map((cmd) => cmd.name);
+      expect(names).toEqual(expect.arrayContaining(['command-a', 'command-c']));
+      expect(names).not.toContain('command-b');
+    });
+
+    it('should match disabled names case-insensitively', async () => {
+      const loader = new MockCommandLoader([mockCommandA, mockCommandB]);
+      const service = await CommandService.create(
+        [loader],
+        new AbortController().signal,
+        new Set(['COMMAND-A']),
+      );
+      const names = service.getCommands().map((cmd) => cmd.name);
+      expect(names).toEqual(['command-b']);
+    });
+
+    it('should ignore empty entries and whitespace in the disabled set', async () => {
+      const loader = new MockCommandLoader([mockCommandA, mockCommandB]);
+      const service = await CommandService.create(
+        [loader],
+        new AbortController().signal,
+        new Set(['', '  ', '  command-a  ']),
+      );
+      const names = service.getCommands().map((cmd) => cmd.name);
+      expect(names).toEqual(['command-b']);
+    });
+
+    it('should be a no-op when disabledNames is undefined or empty', async () => {
+      const loader = new MockCommandLoader([mockCommandA, mockCommandB]);
+      const undefinedResult = await CommandService.create(
+        [loader],
+        new AbortController().signal,
+      );
+      expect(undefinedResult.getCommands()).toHaveLength(2);
+
+      const emptyResult = await CommandService.create(
+        [new MockCommandLoader([mockCommandA, mockCommandB])],
+        new AbortController().signal,
+        new Set<string>(),
+      );
+      expect(emptyResult.getCommands()).toHaveLength(2);
+    });
+
+    it('should disable extension commands by their renamed (final) name', async () => {
+      const builtin = createMockCommand('deploy', CommandKind.BUILT_IN);
+      const extension = {
+        ...createMockCommand('deploy', CommandKind.FILE),
+        extensionName: 'firebase',
+        description: '[firebase] Deploy to Firebase',
+      };
+      const loader = new MockCommandLoader([builtin, extension]);
+      const service = await CommandService.create(
+        [loader],
+        new AbortController().signal,
+        new Set(['firebase.deploy']),
+      );
+      const names = service.getCommands().map((cmd) => cmd.name);
+      // Built-in /deploy remains; the renamed extension command is gone.
+      expect(names).toEqual(['deploy']);
+    });
+  });
+
   it('should handle multiple secondary conflicts with incrementing suffixes', async () => {
     // User has /deploy, /gcp.deploy, and /gcp.deploy1
     const userCommand1 = createMockCommand('deploy', CommandKind.FILE);