chore: install openagent opencode

Signed-off-by: Dmytro Stanchiev <git@dmytros.dev>

.opencode/skills/context7/README.md

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+# Context7 Skill
+
+## Purpose
+
+Fetches **live, version-specific documentation** for external libraries and frameworks using the Context7 API. Ensures you always get current API patterns instead of potentially outdated training data.
+
+**Golden Rule**: Always fetch live docs for external libraries—training data may be outdated.
+
+## Quick Start
+
+### Recommended: Use ExternalScout Subagent
+
+The **ExternalScout** subagent is the recommended way to fetch external documentation. It handles:
+- Library detection
+- Query optimization
+- Documentation filtering and sorting
+- Formatted results with code examples
+
+**Invocation**:
+```
+Use ExternalScout to fetch documentation for [Library Name]: [your specific question]
+```
+
+**Example**:
+```
+Use ExternalScout to fetch documentation for Drizzle ORM: How do I set up modular schemas with PostgreSQL?
+```
+
+### Alternative: Direct Skill Usage
+
+You can also invoke the Context7 skill directly via bash:
+
+```bash
+# Step 1: Search for library
+curl -s "https://context7.com/api/v2/libs/search?libraryName=LIBRARY&query=TOPIC" | jq '.results[0]'
+
+# Step 2: Fetch documentation
+curl -s "https://context7.com/api/v2/context?libraryId=LIBRARY_ID&query=OPTIMIZED_QUERY&type=txt"
+```
+
+See `SKILL.md` for detailed API documentation.
+
+## Supported Libraries
+
+See `library-registry.md` for the complete list of supported libraries including:
+- **Database & ORM**: Drizzle, Prisma
+- **Authentication**: Better Auth, NextAuth.js, Clerk
+- **Frontend**: Next.js, React, TanStack Query/Router/Start
+- **Infrastructure**: Cloudflare Workers, AWS Lambda, Vercel
+- **UI**: Shadcn/ui, Radix UI, Tailwind CSS
+- **State**: Zustand, Jotai
+- **Validation**: Zod, React Hook Form
+- **Testing**: Vitest, Playwright
+
+## Workflow
+
+```
+User Query
+    ↓
+ContextScout (searches internal context)
+    ↓
+No internal context found
+    ↓
+ContextScout recommends ExternalScout
+    ↓
+ExternalScout invoked
+    ├─ Reads library-registry.md
+    ├─ Detects library
+    ├─ Loads query patterns
+    ├─ Fetches from Context7 API
+    ├─ Filters & sorts results
+    └─ Returns formatted documentation
+    ↓
+User receives current, actionable docs
+```
+
+## Files
+
+- **`SKILL.md`** - Context7 API documentation and usage
+- **`library-registry.md`** - Supported libraries, aliases, and query patterns
+- **`README.md`** - This file (overview and quick start)
+
+## Adding New Libraries
+
+To add a new library to the registry:
+
+1. Edit `library-registry.md`
+2. Add entry under appropriate category:
+   ```markdown
+   #### Library Name
+   - **Aliases**: `alias1`, `alias2`, `package-name`
+   - **Docs**: https://example.com/docs
+   - **Context7**: `use context7 for library-name`
+   - **Common topics**: topic1, topic2, topic3
+   ```
+3. (Optional) Add query optimization patterns
+4. ExternalScout will automatically detect the new library
+
+## Related
+
+- **ExternalScout**: `.opencode/agent/subagents/core/externalscout.md`
+- **ContextScout**: `.opencode/agent/subagents/core/contextscout.md`