feat: expand slash-command goals from command templates

Resolves armed slash-command objectives from authoritative templates before dispatch
Applies OpenCode argument expansion for goal metadata in UI and scheduled tasks
Falls back to the raw invocation when command details are unavailable

packages/ui/src/sync/session-ui-store.test.js

@@ -3,7 +3,7 @@ import { opencodeClient } from '@/lib/opencode/client';
 import { useProjectsStore } from '@/stores/useProjectsStore';
 import { useDirectoryStore } from '@/stores/useDirectoryStore';
 import { useSessionWorktreeStore } from './session-worktree-store';
-import { routeMessage, useSessionUIStore } from './session-ui-store';
+import { expandSlashCommandGoalObjective, routeMessage, useSessionUIStore } from './session-ui-store';
 import { setActionRefs, setOptimisticRefs } from './session-actions';
 import { useSkillsStore } from '@/stores/useSkillsStore';
 import { useCommandsStore } from '@/stores/useCommandsStore';
@@ -228,6 +228,31 @@ describe('routeMessage directory scoping', () => {
   });
 });
 
+describe('slash-command goal objectives', () => {
+  test('expands every $ARGUMENTS reference from the authoritative command template', () => {
+    expect(expandSlashCommandGoalObjective('/issue--to-pr LIN-123 --draft', [{
+      name: 'issue--to-pr',
+      template: 'Run the issue pipeline for $ARGUMENTS. Verify $ARGUMENTS is represented by the PR.',
+    }])).toBe('Run the issue pipeline for LIN-123 --draft. Verify LIN-123 --draft is represented by the PR.');
+  });
+
+  test('keeps the invocation when the command template is unavailable', () => {
+    expect(expandSlashCommandGoalObjective('/issue--to-pr LIN-123', [{ name: 'issue--to-pr' }]))
+      .toBe('/issue--to-pr LIN-123');
+  });
+
+  test('matches OpenCode positional and implicit argument expansion', () => {
+    expect(expandSlashCommandGoalObjective('/move "src old" dist extra', [{
+      name: 'move',
+      template: 'Move $1 to $2',
+    }])).toBe('Move src old to dist extra');
+    expect(expandSlashCommandGoalObjective('/review auth module', [{
+      name: 'review',
+      template: 'Review the requested scope.',
+    }])).toBe('Review the requested scope.\n\nauth module');
+  });
+});
+
 describe('runtime worktree topology', () => {
   test('restores independent in-memory maps across A -> B -> A', () => {
     const topologyA = new Map([['/repo', [{ path: '/repo/a', branch: 'a' }]]]);