feat: add new OpenSpec skills for change management and onboarding

- Created `openspec-ff-change` skill for fast-forward artifact creation.
- Introduced `openspec-new-change` skill for structured change creation.
- Developed `openspec-onboard` skill for guided onboarding through OpenSpec workflow.
- Added `openspec-sync-specs` skill for syncing delta specs to main specs.
- Implemented `openspec-verify-change` skill for verifying implementation against change artifacts.
- Updated `.gitignore` to exclude OpenSpec generated files.
- Added `skills-lock.json` to manage skill dependencies.

.agents/skills/shadcn/rules/icons.md

@@ -0,0 +1,101 @@
+# Icons
+
+**Always use the project's configured `iconLibrary` for imports.** Check the `iconLibrary` field from project context: `lucide` → `lucide-react`, `tabler` → `@tabler/icons-react`, etc. Never assume `lucide-react`.
+
+---
+
+## Icons in Button use data-icon attribute
+
+Add `data-icon="inline-start"` (prefix) or `data-icon="inline-end"` (suffix) to the icon. No sizing classes on the icon.
+
+**Incorrect:**
+
+```tsx
+<Button>
+  <SearchIcon className="mr-2 size-4" />
+  Search
+</Button>
+```
+
+**Correct:**
+
+```tsx
+<Button>
+  <SearchIcon data-icon="inline-start"/>
+  Search
+</Button>
+
+<Button>
+  Next
+  <ArrowRightIcon data-icon="inline-end"/>
+</Button>
+```
+
+---
+
+## No sizing classes on icons inside components
+
+Components handle icon sizing via CSS. Don't add `size-4`, `w-4 h-4`, or other sizing classes to icons inside `Button`, `DropdownMenuItem`, `Alert`, `Sidebar*`, or other shadcn components. Unless the user explicitly asks for custom icon sizes.
+
+**Incorrect:**
+
+```tsx
+<Button>
+  <SearchIcon className="size-4" data-icon="inline-start" />
+  Search
+</Button>
+
+<DropdownMenuItem>
+  <SettingsIcon className="mr-2 size-4" />
+  Settings
+</DropdownMenuItem>
+```
+
+**Correct:**
+
+```tsx
+<Button>
+  <SearchIcon data-icon="inline-start" />
+  Search
+</Button>
+
+<DropdownMenuItem>
+  <SettingsIcon />
+  Settings
+</DropdownMenuItem>
+```
+
+---
+
+## Pass icons as component objects, not string keys
+
+Use `icon={CheckIcon}`, not a string key to a lookup map.
+
+**Incorrect:**
+
+```tsx
+const iconMap = {
+  check: CheckIcon,
+  alert: AlertIcon,
+}
+
+function StatusBadge({ icon }: { icon: string }) {
+  const Icon = iconMap[icon]
+  return <Icon />
+}
+
+<StatusBadge icon="check" />
+```
+
+**Correct:**
+
+```tsx
+// Import from the project's configured iconLibrary (e.g. lucide-react, @tabler/icons-react).
+import { CheckIcon } from "lucide-react"
+
+function StatusBadge({ icon: Icon }: { icon: React.ComponentType }) {
+  return <Icon />
+}
+
+<StatusBadge icon={CheckIcon} />
+```