feat: add in-chat skill discovery and local registry install command

src/commands/builtin/index.test.ts

@@ -1,6 +1,6 @@
 import { describe, it, expect, vi } from 'vitest';
 
-import { createApproveCommand, createApprovalsCommand, createContextCommand, createDenyCommand, createElevateCommand, createModelCommand, createQueueCommand, createResearchCommand, createTransferCommand } from './index.js';
+import { createApproveCommand, createApprovalsCommand, createContextCommand, createDenyCommand, createElevateCommand, createModelCommand, createQueueCommand, createResearchCommand, createSkillCommand, createTransferCommand } from './index.js';
 
 describe('builtin /model command', () => {
   it('passes through the full argument string', async () => {
@@ -241,3 +241,19 @@ describe('builtin approval commands', () => {
     expect(result).toEqual({ handled: true, text: 'denied' });
   });
 });
+
+describe('builtin /skill command', () => {
+  it('passes subcommand text to skillCommand service', async () => {
+    const cmd = createSkillCommand();
+    const skillCommand = vi.fn(() => 'ok');
+    const result = await cmd.execute(['search', 'calendar'], {
+      channel: 'test',
+      senderId: 'user',
+      sessionId: 's1',
+      rawInput: '/skill search calendar',
+      services: { skillCommand },
+    });
+    expect(skillCommand).toHaveBeenCalledWith('search calendar');
+    expect(result).toEqual({ handled: true, text: 'ok' });
+  });
+});

src/commands/builtin/index.ts

@@ -284,6 +284,22 @@ export function createDenyCommand(): CommandDefinition {
   };
 }
 
+export function createSkillCommand(): CommandDefinition {
+  return {
+    name: 'skill',
+    description: 'In-chat skill discovery and install (list/search/install)',
+    execute: async (args, ctx) => {
+      if (!ctx.services?.skillCommand) {
+        return notAvailable('Skill command');
+      }
+      return {
+        handled: true,
+        text: await ctx.services.skillCommand(args.join(' ').trim()),
+      };
+    },
+  };
+}
+
 export function registerBuiltinCommands(registry: CommandRegistry): void {
   registry.register(createHelpCommand(registry));
   registry.register(createStatusCommand());
@@ -299,4 +315,5 @@ export function registerBuiltinCommands(registry: CommandRegistry): void {
   registry.register(createApprovalsCommand());
   registry.register(createApproveCommand());
   registry.register(createDenyCommand());
+  registry.register(createSkillCommand());
 }

src/commands/index.ts

@@ -13,5 +13,6 @@ export {
   createApprovalsCommand,
   createApproveCommand,
   createDenyCommand,
+  createSkillCommand,
   registerBuiltinCommands,
 } from './builtin/index.js';

src/commands/types.ts

@@ -38,4 +38,5 @@ export interface CommandServices {
   getApprovals?: () => Promise<string> | string;
   approvePending?: (input: string) => Promise<string> | string;
   denyPending?: (input: string) => Promise<string> | string;
+  skillCommand?: (input: string) => Promise<string> | string;
 }